Author Topic: KARI: KSLV-II Development Updates and Discussion Thread  (Read 45860 times)

Offline russianhalo117

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Dedicated thread to replace the hodgepodge of other threads in 2 sections. Mods please consolidate all related posts into this dedicated thread.
« Last Edit: 11/28/2018 09:59 am by eeergo »

Offline russianhalo117

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #1 on: 06/29/2018 07:16 pm »
KARI KSLV-II TLV testing:
[KARI]한국형발사체 시험발사체 연구개발 현장을 가다!

한국항공우주연구원(KARI)
Published on 27 Mar 2018
한국형발사체 시험발사체 연구개발 현장을 가다!

발사체체계개발단장으로부터 듣는 시험발사체 이야기를 영상으로 확인하세요.


Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #2 on: 06/30/2018 03:06 am »
Bing Translation.

[KARI] A research and development site for the Korean projectile test projectile!

Korea Aerospace Research Institute (KARI)
Published on 27 Mar 2018
A research and development site for the Korean projectile test projectile!

See the story of the test projectile from the head of the projectile system development.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline wesley

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #3 on: 07/16/2018 08:31 am »
Machine translation is always hilarious. Since we have a nice new thread, I'll note some details on what we're seeing here.

"한국형발사체" translates to "Korean Standard Launch Vehicle", which is another way of saying Korean Space Launch Vehicle II or KSLV-II. It's the "Indigenous Standard" version of the launch vehicle because the first version, KSLV-I actually used the Russian first stage and thus not fully indigenous.

"시험발사체" is the "Test Launch Vehicle" for the KSLV-II. This one is created to test the operational characteristics of the newly developed KARI 75-Ton Engine (I'll call it KARI-75), which has not yet been used in a space launch operation as of yet. The success of this test vehicle should instill confidence in building and flying the "real" KSLV-II.

The KSLV-II TLV is effectively a single stage and uses one KARI-75. Originally, it was to be two stages - stage 1 with one KARI-75 and stage 2 with one KARI-7. But the second stage of the current TLV has no engine, but just a mass simulator.

In contrast, KSLV-II will be a three-stage rocket. Stage 1 with four KARI-75 in cluster, stage 2 with one KARI-75, and stage 3 with one KARI-7.

There are to be three models of TLV: Engineering Model (EM), Qualification Model (QM), and Flight Model (FM). Building and testing of both EM and QM were successful, with the latter subject to the firing tests on the test stand as seen on the video linked in the earlier post. Currently, the FM is under construction and this is the one that will be launched for real on October 2018.

Offline SciNews

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #4 on: 08/16/2018 10:46 am »
KSLV-II launch planned for October 2018
https://www.jqknews.com/news/57216-South_Korea_plans_to_launch_a_new_launch_vehicle_in_October_after_Lo_Lao_3_hit_2.html
a mock-up was transported and raised on the launch pad

article in Korean https://news.joins.com/article/22888613

Offline Kryten

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #5 on: 09/14/2018 12:06 pm »
 Time-lapse of QM vehicle assembly;

Offline FutureSpaceTourist

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #6 on: 10/18/2018 09:28 am »
Quote
S. Korea Starts Drawing up Plans for Next-generation Satellite Launch Vehicles

With testing of the engine for Korea Space Launch Vehicle-II (KSLV-II) slated for late this month, the South Korean government has begun to draw up plans to develop a next-generation satellite launch vehicle that will succeed KSLV-II.

The government is going to develop an improved and lighter version of KSLV-II, while at the same time developing another version which is smaller and cheaper than KSLV-II.

http://www.businesskorea.co.kr/news/articleView.html?idxno=25542

Offline Lucid Nonsense

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #7 on: 10/21/2018 06:54 pm »
The article above is based on this paper: http://www.itfind.or.kr/publication/regular/periodical/read.do?selectedId=02-001-181010-000014 by KISTEP and the information on Korea's space plans are referenced mainly from this policy paper: https://msit.go.kr/web/msipContents/contentsView.do?cateId=mssw311&artId=1374583 by the Ministry of ICT and Technology.

Basically what it means is that KSLV-2 will be improved (lighter weight, improved engine performance, ect)  and commercialised (the launch and marketing of the KSLV-2 will be transferred from the Korean NASA to an actual company. The government will probably create a comercial launch provider entity or maybe private companies will bid and the government transfer the KSLV-2 over to them) by 2025 and afterwards a small-sat launcher will be made which will basically be the KSLV-2 TLV with the final 7ton engine and stage included. There are then future plans for a EELV-class launcher but that's too far in the future, just think of it as a vague ambition.

Offline spacevogel

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #8 on: 11/13/2018 07:21 am »
Google translate of the news release
Quote
Nuri test launch vehicle , launching on Nov. 28 
- The final launch date should be confirmed after considering the weather conditions.

□ The Ministry of Science and Technology (Ministry of Information and Communication) and the Korea Aerospace Research Institute (President Lim Cheol-ho, hereinafter referred to as "Woo-yun Lee") will hold the "3rd test launch project management committee" on November 13, Test launch vehicle.

  o The launch date has been determined in consideration of the technical preparation status of the development team and the schedule for overseas notification.

  o The final launch date and launch time will be determined at the close of the launch date due to future weather conditions, but if there is no problem with the preparation process, it will be carried out on the afternoon of November 28th. Also, considering the schedule change due to future climate conditions, the launch date will be set from Nov. 29 to Dec. 4.

...
« Last Edit: 11/13/2018 07:22 am by spacevogel »

Offline Lucid Nonsense

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #9 on: 11/13/2018 11:19 pm »
This is more for the future but still interesting:
http://english.yonhapnews.co.kr/news/2018/11/12/0200000000AEN20181112008151315.html

Quote
SEOUL, Nov. 12 (Yonhap) -- South Korea is in talks with the United States over its pursuit of developing solid-fuel space vehicles for non-military purposes, Seoul's foreign ministry said Monday.

Last year, the allies agreed to eliminate restrictions on the payload weight of South Korea's ballistic missiles in response to a series of North Korean provocations at that time. South Korea is allowed to develop ballistic missiles with a range of up to 800 kilometers.

"Currently, consultations are under way between South Korea and the U.S. in connection with lifting limits on the use of solid fuel for space vehicles to strengthen space development in the civilian sector," the Ministry of Foreign Affairs said.

It did not provide more details, citing ongoing state-to-state negotiations on the sensitive matter....

Offline starbase

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #10 on: 11/27/2018 07:24 am »
Test launch is go for tomorrow (Nov. 28).

Source: https://twitter.com/kari2030/status/1067317171280318464
bit.ly/SpaceLaunchCalendar ☆ bit.ly/SpaceEventCalendar

Offline edkyle99

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #11 on: 11/27/2018 05:32 pm »
Is the first stage of this test vehicle essentially the second stage of the planned KSLV-II?  Or is it merely the same 2.6 meter diameter as the second stage?

 - Ed Kyle
« Last Edit: 11/27/2018 05:38 pm by edkyle99 »

Offline russianhalo117

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #12 on: 11/27/2018 05:36 pm »
Is the first stage of this test vehicle essentially the second stage of the planned KSLV-II?  Or is it merely the same 2.6 meter diameter as the second stage?

 - Ed Kyle
Second stage yes, but AFAIU with modifications to work with the KSLV-1 launch mount which will be replaced after TLV test flight(s) are done.
« Last Edit: 11/28/2018 01:08 am by russianhalo117 »

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #13 on: 11/27/2018 09:40 pm »
Here's an image that was posted on 13 November.

twitter.com/kari2030/status/1062254241513795584
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #14 on: 11/27/2018 09:56 pm »
Video posted two says ago with interviews and construction of TLV.

Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Galactic Penguin SST

Is the first stage of this test vehicle essentially the second stage of the planned KSLV-II?  Or is it merely the same 2.6 meter diameter as the second stage?

 - Ed Kyle

IIRC it uses the same structure as the planned KSLV-II 2nd stage but uses only a single engine: https://forum.nasaspaceflight.com/index.php?topic=38220.20
Astronomy & spaceflight geek penguin. In a relationship w/ Space Shuttle Discovery. Current Priority: Chasing the Chinese Spaceflight Wonder Egg & A Certain Chinese Mars Rover

Offline Steven Pietrobon

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Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #17 on: 11/28/2018 01:34 am »
Found the NOTAM! Go to http://aim.koca.go.kr/xNotam/?language=ko_KR and search for UNL. The second NOTAM is from 06:30 to 09:40 UTC today.

GG RKZZNAXX
140851 RKRRYNYX
(D8069/18 NOTAMN
Q)RKRR/QRPCA/IV/NBO/W/000/999/3426N12732E006
A)RKRR B)1811262300 C)1811280630
E)DUE TO TEST LAUNCH VEHICLE(TLV-NURI) ROCKET LAUNCH FM NARO SPACE
CENTER TEMPO PROHIBITED AREA WILL BE ESTABLISHED AS FLW :
A CIRCLE RADIUS 5NM CENTERED ON 342555N1273209E
- RMK : EXC SAR, MEDIVAC, EMG FLT
F)SFC G)UNL)

GG RKZZNAXX
140850 RKRRYNYX
(D8068/18 NOTAMN
Q)RKRR/QRPCA/IV/NBO/W/000/999/3408N12731E030
A)RKRR B)1811280630 C)1811280940
E)DUE TO TEST LAUNCH VEHICLE(TLV-NURI) ROCKET LAUNCH FM NARO SPACE
CENTER
TEMPO PROHIBITED AREA WILL BE ESTABLISHED AS FLW:
AREA BOUNDED BY THE FOLLOWING
343018N1272436E-343210N1273729E-342651N1273836E-341927N1274743E-
334726N1275259E-334410N1272442E-341618N1271915E-342458N1272545E
TO THE BEGINNING
- RMK : EXC SAR, MEDIVAC, EMG FLT
F)SFC G)UNL)
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #18 on: 11/28/2018 05:16 am »
Vehicle is fuelled up. Launch is at 07:00 UTC.

twitter.com/kari2030/status/1067660896783130624

"The test projectile will be launched today at 4:00 p.m. Thank you very much for your support."
« Last Edit: 11/28/2018 05:17 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #19 on: 11/28/2018 05:21 am »
Rollout video.

Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #20 on: 11/28/2018 06:00 am »
Launch should be happening about now.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline jcm

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #21 on: 11/28/2018 06:05 am »
Launch occurred on time
-----------------------------

Jonathan McDowell
http://planet4589.org


Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #23 on: 11/28/2018 06:10 am »
A later view of the contrail.

twitter.com/SKorea_rocket/status/1067675499281825793

"[KSLV-II TLV] TLV has lifted-off. Seems good."
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #24 on: 11/28/2018 06:12 am »
Launch success!

twitter.com/SKorea_rocket/status/1067677280833462272

[KSLV-II TLV] TLV has made it's goal : 143-second burn of the 75tf engine. Mission SUCCESS!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #25 on: 11/28/2018 06:15 am »
Past apogee.

twitter.com/SKorea_rocket/status/1067678261088382978

[KSLV-II TLV] Vehicle has passed its apogee! (180~220km)
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #26 on: 11/28/2018 06:20 am »
Launch photos.

twitter.com/SKorea_rocket/status/1067679226415919105

[KSLV-II TLV] "Mission success" - Photos are coming out. High-quality photo will come out 12 minutes later.
« Last Edit: 11/28/2018 06:24 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #27 on: 11/28/2018 06:23 am »
Official success.

twitter.com/SKorea_rocket/status/1067680091998539776

[KSLV-II TLV] More photos coming out - Mission is a OFFICIAL SUCCESS, according to KARI.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #28 on: 11/28/2018 06:30 am »
twitter.com/SKorea_rocket/status/1067681773528576002

Official : KSLV-II TLV lifted off (16:00KST 11/28) and passed its apogee (185km~), finally falled to the sea. (somewhere near Jeju-Japan) And, It's SUCCESS has been announced. - Which means, Liquid rocket engine technology of South Korea is now proved.
« Last Edit: 11/28/2018 06:30 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #29 on: 11/28/2018 06:46 am »
twitter.com/SKorea_rocket/status/1067682477085323264

[KSLV-II TLV] Official Photos are coming out. (credit=KARI)
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #30 on: 11/28/2018 06:46 am »
Launch video.

"Launch Success! We will publish the launch as a video."

https://twitter.com/kari2030/status/1067684625529503745
« Last Edit: 11/28/2018 06:48 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #31 on: 11/28/2018 06:49 am »
"[KSLV-II TLV] Official Launch Video. (Credit=KARI)"

https://twitter.com/SKorea_rocket/status/1067686029887295488
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #32 on: 11/28/2018 07:06 am »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #33 on: 11/28/2018 07:11 am »
Burn time of 151 s and altitude of 209 km.

twitter.com/SKorea_rocket/status/1067691038045696000

[KSLV-II TLV] New Info : TLV engine's actual burn time was 151 seconds, which is clearly success. (Goal is 143s) Also, the apogee was 209km.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #34 on: 11/28/2018 07:19 am »
Another video of the launch.

Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #35 on: 11/28/2018 07:24 am »
The control room.

Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline wesley

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #36 on: 11/29/2018 12:34 am »
I was at an observation spot 7km away from the launch site. Here's my video. Attached is a couple of the best frames I could get out of it. It was pretty hazy that day, but the 125x optical zoom did its job.



Related blog post: http://tool-box.info/blog/archives/2663-Watching-a-rocket-launch-NuriKSLV-II-TLV.html
« Last Edit: 11/29/2018 12:45 am by wesley »

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #37 on: 11/29/2018 08:22 am »
TLV in 4K!

Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline edkyle99

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #38 on: 11/29/2018 09:10 pm »
Is the first stage of this test vehicle essentially the second stage of the planned KSLV-II?  Or is it merely the same 2.6 meter diameter as the second stage?

 - Ed Kyle

IIRC it uses the same structure as the planned KSLV-II 2nd stage but uses only a single engine: https://forum.nasaspaceflight.com/index.php?topic=38220.20
Right, but note that the KSLV-2 second stage will also only use one engine, albeit with either a vacuum-optimized engine version or with a nozzle extension. 

 - Ed Kyle

Offline Lucid Nonsense

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #39 on: 11/29/2018 09:56 pm »
Is the first stage of this test vehicle essentially the second stage of the planned KSLV-II?  Or is it merely the same 2.6 meter diameter as the second stage?

 - Ed Kyle

IIRC it uses the same structure as the planned KSLV-II 2nd stage but uses only a single engine: https://forum.nasaspaceflight.com/index.php?topic=38220.20
Right, but note that the KSLV-2 second stage will also only use one engine, albeit with either a vacuum-optimized engine version or with a nozzle extension. 

 - Ed Kyle

There is no sure way of knowing on a highly technical level but by infering from Korean media reports it seems like the TLV has a single first-stage/sea-level engine from the actual KSLV-2, identical propellant tank design and outer mold line to KSLV-2 second stage, a dummy payload on top that laregly resembles the outer mold line of the KSLV-2 stage 3 and fairing, and additional avionics/interfaces so it can be launched from the ground.

Offline Steven Pietrobon

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #40 on: 11/30/2018 04:18 am »
The KARI blog shows the TLV configuration. Half the rocket is just empty space.

https://blog.naver.com/karipr/221407284696
« Last Edit: 11/30/2018 04:20 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline wesley

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #41 on: 11/30/2018 04:44 am »
Is the first stage of this test vehicle essentially the second stage of the planned KSLV-II?  Or is it merely the same 2.6 meter diameter as the second stage?

 - Ed Kyle

IIRC it uses the same structure as the planned KSLV-II 2nd stage but uses only a single engine: https://forum.nasaspaceflight.com/index.php?topic=38220.20
Right, but note that the KSLV-2 second stage will also only use one engine, albeit with either a vacuum-optimized engine version or with a nozzle extension. 

 - Ed Kyle

There is no sure way of knowing on a highly technical level but by infering from Korean media reports it seems like the TLV has a single first-stage/sea-level engine from the actual KSLV-2, identical propellant tank design and outer mold line to KSLV-2 second stage, a dummy payload on top that laregly resembles the outer mold line of the KSLV-2 stage 3 and fairing, and additional avionics/interfaces so it can be launched from the ground.
The official website mentions that the engine is supposed to be equivalent to the 2nd stage of the KSLV-II, but you are correct that it would be the sea-level version instead of the vacuum version due to the difference in the altitude where the engine would be lit.

According to a Korean news article, there's currently a sea-level KARI 75-Ton engine #11 for the first stage, a vacuum KARI 75-Ton engine for the second stage, and a KARI 7-Ton engine #4 for the third stage currently installed in the test building for performance testing. So all three types of engines that go into the KSLV-II proper are already well into development.

https://news.v.daum.net/v/20181130030106646

The KARI blog shows the TLV configuration. Half the rocket is just empty space.

https://blog.naver.com/karipr/221407284696
The top half is the mass simulator that weighs roughly 8 tons, which is supposed to accurately simulate the dimensions and the mass of the KSLV-II 3rd stage according to the official website. So it's not an empty space but a hunk of metal.

https://kslvii.kari.re.kr/modedg/contentsView.do?ucont_id=CTX000005&srch_menu_nix=b1lD3n75
« Last Edit: 11/30/2018 04:59 am by wesley »

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #42 on: 11/30/2018 06:02 am »
Is the first stage of this test vehicle essentially the second stage of the planned KSLV-II?  Or is it merely the same 2.6 meter diameter as the second stage?

 - Ed Kyle

IIRC it uses the same structure as the planned KSLV-II 2nd stage but uses only a single engine: https://forum.nasaspaceflight.com/index.php?topic=38220.20
Right, but note that the KSLV-2 second stage will also only use one engine, albeit with either a vacuum-optimized engine version or with a nozzle extension. 

 - Ed Kyle

There is no sure way of knowing on a highly technical level but by infering from Korean media reports it seems like the TLV has a single first-stage/sea-level engine from the actual KSLV-2, identical propellant tank design and outer mold line to KSLV-2 second stage, a dummy payload on top that laregly resembles the outer mold line of the KSLV-2 stage 3 and fairing, and additional avionics/interfaces so it can be launched from the ground.
The official website mentions that the engine is supposed to be equivalent to the 2nd stage of the KSLV-II, but you are correct that it would be the sea-level version instead of the vacuum version due to the difference in the altitude where the engine would be lit.

According to a Korean news article, there's currently a sea-level KARI 75-Ton engine #11 for the first stage, a vacuum KARI 75-Ton engine for the second stage, and a KARI 7-Ton engine #4 for the third stage currently installed in the test building for performance testing. So all three types of engines that go into the KSLV-II proper are already well into development.

https://news.v.daum.net/v/20181130030106646

The KARI blog shows the TLV configuration. Half the rocket is just empty space.

https://blog.naver.com/karipr/221407284696
The top half is the mass simulator that weighs roughly 8 tons, which is supposed to accurately simulate the dimensions and the mass of the KSLV-II 3rd stage according to the official website. So it's not an empty space but a hunk of metal.

https://kslvii.kari.re.kr/modedg/contentsView.do?ucont_id=CTX000005&srch_menu_nix=b1lD3n75



This image should clarify further. SL Engine, Propelant tanks, interstage (sans serperation hardware), and KSLV-2 3rd stage + fairing + satellite mass/aerodynamic simulator. 
« Last Edit: 11/30/2018 10:31 am by Lucid Nonsense »

Offline russianhalo117

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #43 on: 11/30/2018 08:38 pm »
The KARI blog shows the TLV configuration. Half the rocket is just empty space.

https://blog.naver.com/karipr/221407284696
The third stage was not ready and was decided to drop it from TLV (TLV-1). KARI if needed will make a second TLV launch (TLV-2) if they decide there is a need to test fly stage 3 before the first flight of KSLV-II (NURI)

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #44 on: 12/01/2018 01:33 am »
The KARI blog shows the TLV configuration. Half the rocket is just empty space.

https://blog.naver.com/karipr/221407284696
The third stage was not ready and was decided to drop it from TLV (TLV-1). KARI if needed will make a second TLV launch (TLV-2) if they decide there is a need to test fly stage 3 before the first flight of KSLV-II (NURI)
Second launch of TLV would have occurred in 2019 if the this one was unsuccessful. I wonder if KARI will still devote resources to test the 3rd stage in the way you mentioned. No doubt I'll go see it if it happens.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #45 on: 12/08/2018 08:00 am »
Korea's staged combustion cycle rocket engine test (100s)
On November 28, KSLV-II TLV was successfully launched to qualify Korea's 75tonf liquid-engine. So, now Korea has two gas generator cycle engines : KRE-007 & KRE-075.
Now, a new engine is being developed to enhance performance : It's a Staged combustion cycle engine! It is more complex than gas generator cycle, but more efficient. So, it'll be used in the upper stage of future Korean launch vehicles.
This video is showing the test (12/6) of the 9tonf staged combustion cycle engine, which was developed in Korea. (Maybe called as KRE-009?) Burn time was 100 seconds, which was success.
Video credit = KARI



Offline yoichi

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« Last Edit: 12/11/2018 06:21 am by yoichi »

Online Tywin

Korea's staged combustion cycle rocket engine test (100s)
On November 28, KSLV-II TLV was successfully launched to qualify Korea's 75tonf liquid-engine. So, now Korea has two gas generator cycle engines : KRE-007 & KRE-075.
Now, a new engine is being developed to enhance performance : It's a Staged combustion cycle engine! It is more complex than gas generator cycle, but more efficient. So, it'll be used in the upper stage of future Korean launch vehicles.
This video is showing the test (12/6) of the 9tonf staged combustion cycle engine, which was developed in Korea. (Maybe called as KRE-009?) Burn time was 100 seconds, which was success.
Video credit = KARI



The engine specification  8)

https://twitter.com/Kor_Spaceflight/status/1071394161033539584
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Offline Lucid Nonsense

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #48 on: 12/11/2018 03:28 pm »
That particular twitter is repackaging what is in the public domain + stuff in papers in English which is good as it can reach a wider audience.

I think he has explained most stuff about what will happen in the future.

Launch vehicle plans:
1. KSLV-2 (Similar to Ariane 1 but with RP-1/LOX engines)
2. SSLV (Similar to KSLV-2 TLV)
3. GEO-SLV (Similar to Ariane 4 but with RP-1/LOX engines and only liquid boosters until a political agreement for solids with the US)

Engine plans:
1. Upgrading the 75tonf engines to 90tonf
2. Developing an 8~10tonf closed-cycle RP-1/LOX upper stage engine for enhanced performance for higher orbits

GEO-SLV launch sites/trajectories:
1. Launch from Naro (Planned, most likely)
2. East sea near DMZ (Threads the needle over the Tsugaru Strait)
3. Sea launch at the equator
(Ignore 2 and 3, using Naro is 99% a done deal too many complications with the others)

Extra:
Possible improvement of KSLV-2 performance with better structural mass ratio + improved engines (No stretch)

Sources (Papers under https://creativecommons.org/licenses/by-nc/3.0/):
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE07156787
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE07414589
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE07543940

Offline Mammutti

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #49 on: 12/29/2020 11:50 am »
https://twitter.com/Kor_Spaceflight/status/1343894686197448704

Quote from: S.Korean Spaceflight
The first launch of the KSLV-II has been postponed to November 2021. The reason is: modification of the assembly procedure, delay in parts delivery, need for more time in stage assembly, and the need for Wet Dress Rehearsal. Second launch is May 2022.

Offline Mammutti

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #50 on: 01/28/2021 09:15 am »
https://twitter.com/Kor_Spaceflight/status/1354712554635816961

Quote from: S.Korean Spaceflight
A SUCCESSFUL hot fire test of KSLV-II first stage! 4 KRE-075 engines were fired simultaneously at the Naro Space Center. More info coming out soon

Offline whiztech

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #51 on: 02/25/2021 08:32 am »
https://www.facebook.com/karipr/posts/3670431673064721

Google translation:

Quote
Today, at the Naroju Center, the second combustion test of the first stage propulsion engine of the Korean launch vehicle “Nuri” was held. The burning time in the first test was 30 seconds, whereas in this second test, it burned for 100 seconds.
Through this test, we were able to confirm engine performance, such as propellant supplied to the engine normally and combustion proceeded stably. We ask for your support for the launch of Nuriho!

https://twitter.com/kari2030/status/1364855679815536645

Google translation:

Quote
#Successful 2nd Comprehensive Combustion Test by the Nuri 1st Stage Engine!

The combustion time in the first test was 30 seconds, but in this second test, combustion was conducted for 100 seconds, and the engine performance was confirmed, such as the propellant supplied to the engine normally and the combustion proceeded stably.

edit: adding video

Google translation:

Quote
Korean-type launch vehicle Nuri, 1 step 100 second comprehensive combustion test success!

Nuriho 1-stage QM 100 second comprehensive combustion test success!

The combustion time of the first test was 100 seconds longer than 30 seconds, and the propellant was normally supplied to the engine and the combustion proceeded stably, confirming the engine performance.

We ask for your support for the launch of Nuriho!

« Last Edit: 02/25/2021 08:42 pm by whiztech »

Offline Mammutti

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #52 on: 03/25/2021 09:36 am »


https://twitter.com/Kor_Spaceflight/status/1375030779294588930

Quote from: S.Korean Spaceflight
Four KRE-075 engines firing simultaneously for 125.5 seconds! This was the final hot fire test of KSLV-II first stage, and was a success!

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Offline edkyle99

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #54 on: 03/27/2021 12:56 am »

The shutdown sound at about 2:10 in this video may be the coolest rocket engine noise I've heard.

 - Ed Kyle
« Last Edit: 03/27/2021 12:57 am by edkyle99 »

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #55 on: 04/03/2021 02:58 pm »
Has a payload been announced for first launch?
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Offline Bean Kenobi

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #56 on: 04/03/2021 03:42 pm »
Has a payload been announced for first launch?

http://www.businesskorea.co.kr/news/articleView.html?idxno=63539

Quote
KSLV-2 is scheduled to carry a satellite mock-up and the second launch scheduled for May next year is to include a demonstration satellite of less than 200 kg along with a micro cube set.

Offline GraniteHound92

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #57 on: 06/01/2021 01:47 pm »
Nuri (KSLV-II) pathfinder rolled to pad.

https://en.yna.co.kr/view/AEN20210601002651320

Launch expected in October.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #58 on: 07/01/2021 12:41 am »
Nuri (KSLV-II) pathfinder rolled to pad.

https://en.yna.co.kr/view/AEN20210601002651320

Launch expected in October.
If the maiden launch of the the Nuri goes as planned, then South Korea will have launched a truly homegrown space launch vehicle, because the first stage of the Naro was built in Russia whereas the second stage was built in South Korea, and the South Koreans were shocked to see North Korea beat the South in putting a satellite into orbit.

Offline Davidthefat

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #59 on: 07/01/2021 06:48 am »
Nuri (KSLV-II) pathfinder rolled to pad.

https://en.yna.co.kr/view/AEN20210601002651320

Launch expected in October.
If the maiden launch of the the Nuri goes as planned, then South Korea will have launched a truly homegrown space launch vehicle, because the first stage of the Naro was built in Russia whereas the second stage was built in South Korea, and the South Koreans were shocked to see North Korea beat the South in putting a satellite into orbit.

The Nodong engines are scaled up SCUD engines, so based on a relatively reliable design. But yes, certainly seeing North Korea make it to space earlier than South Korea did was surprising. I reckon that was partially at fault of politics, certainly South Korea had the manpower with the skillsets and industry to support such endeavor to achieve it much earlier.

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #60 on: 10/13/2021 07:51 am »
Belated cross-post:
https://twitter.com/Kor_Spaceflight/status/1435111252330700804
Quote
Wet Dress Rehearsal of the KSLV-II is completed! The vehicle is in good condition, and is now ready for flight. A small problem with the launch pad air pressure system is found, but there will be no change of the launch date. (October 21th)
[dated September 7]


KSLV-II a.k.a. Nuri maiden orbital launch thread
« Last Edit: 10/13/2021 08:22 am by zubenelgenubi »
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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #61 on: 04/09/2022 09:42 am »
The second launch is scheduled for June 15, 2022:

Z0196/22 NOTAMN 
Q) RKRR/QWMTT/IV/BO/W/000/999/3535N12700E999
A) RKRR B) 2206150600 C) 2206231000
E) TRIGGER NOTAM-AIRAC AIP SUP 8/22
WEF 1500 UTC 15 JUN 2022 TIL 1000 UTC 23 JUN 2022
KOREA SPACE LAUNCH VEHICLE II(KSLV II) LAUNCH
CREATED: 07 Apr 2022 02:16:00
SOURCE: RKRRYNYX
This message reflects my personal opinion based on open sources of information.

Offline Galactic Penguin SST

The second launch is scheduled for June 15, 2022:

Z0196/22 NOTAMN 
Q) RKRR/QWMTT/IV/BO/W/000/999/3535N12700E999
A) RKRR B) 2206150600 C) 2206231000
E) TRIGGER NOTAM-AIRAC AIP SUP 8/22
WEF 1500 UTC 15 JUN 2022 TIL 1000 UTC 23 JUN 2022
KOREA SPACE LAUNCH VEHICLE II(KSLV II) LAUNCH
CREATED: 07 Apr 2022 02:16:00
SOURCE: RKRRYNYX

So the launch is on schedule since the date was announced back in February:

Apparently KSLV-II's 2nd launch has now been scheduled on June 15 (needs someone who reads Korean to confirm): https://twitter.com/kari2030/status/1497100491737923584
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Offline Vahe231991

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #63 on: 06/21/2022 08:21 pm »
The Nuri (KSLV-2) rocket carried out its first successful orbital launch today. Is there any latest word on construction of the Nuri rocket scheduled for launch in December?

Offline Conexion Espacial

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #64 on: 06/21/2022 10:07 pm »
The Nuri (KSLV-2) rocket carried out its first successful orbital launch today. Is there any latest word on construction of the Nuri rocket scheduled for launch in December?
In this video, you can see that in the second 00:10 and in the minute 01:58 comes out what looks like another rocket, if so, I guess it is already well advanced to achieve a second launch this year.
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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #65 on: 06/22/2022 03:22 pm »
Is it possible that South Korea could increase the rate of production of Nuri rockets to 4 rockets pear year so as to allow the South to use homegrown SLVs to launch into orbit sophisticated spy satellites to spy on North Korea?

Offline russianhalo117

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #66 on: 06/22/2022 03:31 pm »
Is it possible that South Korea could increase the rate of production of Nuri rockets to 4 rockets pear year so as to allow the South to use homegrown SLVs to launch into orbit sophisticated spy satellites to spy on North Korea?
They are in the initial production/initial operational capability phase. They are not there yet on their roadmap.
« Last Edit: 06/22/2022 03:32 pm by russianhalo117 »

Offline FutureSpaceTourist

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #67 on: 12/02/2022 05:41 am »
https://twitter.com/cnspaceflight/status/1598562920870604800

Quote
Hanwha Aerospace is awarded $212 million contract to lead the production of three Nuri (KSLV-II) in the next three years. Hanwha will also receive technology transfer from KARI

https://www.ajudaily.com/view/20221202145925153

twitter.com/kari2030/status/1598528201500037120

Quote
Hanwha Aerospace was finally confirmed as the Korean launch vehicle ( #누리호 ) system comprehensive company.
Hanwha Aerospace will supervise the production of the Korean launch vehicle, perform overall management of companies participating in component manufacturing, participate in repeated launches of the Nuri, and receive related technology transfers such as launch operation.
« Last Edit: 12/02/2022 05:41 am by FutureSpaceTourist »

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #68 on: 03/10/2023 06:32 am »
The next launch is scheduled for 2023 May 10:

Z0129/23 NOTAMN 
Q) RKRR/QWMTT/IV/BO/W/000/999/3535N12700E999
A) RKRR B) 2305100900 C) 2305240900
E) TRIGGER NOTAM-AIRAC AIP SUP 5/23 WEF 0900 UTC 10 MAY 2023 TIL 0900
UTC 22 JUN 2023
- KSLV II(KOREA SPACE LAUNCH VEHICLE II) LAUNCH
CREATED: 09 Mar 2023 08:51:00
SOURCE: RKRRYNYX
This message reflects my personal opinion based on open sources of information.

Offline Mahurora

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #69 on: 06/09/2023 01:42 pm »
Some interesting information regarding KSLV-IIA. As I've mentioned before, KSLV-IIA was supposed to be an improved variant of KSLV-II that was planned as a follow-up development. There were various improvements to the rocket ranging from improved inert mass ratio, improved engine performance (upgraded 1st stage based on improvements to KRE-075 and a new SC 9tf 3rd stage motor), boosters (both liquid and solid considered), etc.

It was ultimately scrapped in 2020 in favor of KSLV-III
« Last Edit: 06/09/2023 01:46 pm by Mahurora »

Offline Mahurora

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #70 on: 06/09/2023 01:44 pm »
Earlier KSLV-II improved variant proposals with boosters and its performance.

Offline Mahurora

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #71 on: 06/09/2023 01:46 pm »
envisioned performance improvements for the later KSLV-IIA model

Offline Mahurora

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Re: KARI: KSLV-II Development Updates and Discussion Thread
« Reply #72 on: 06/09/2023 01:51 pm »
improved combustion chamber for an upgraded engine based on KRE-075

 

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