Author Topic: South Korean lunar orbiter and lander  (Read 49617 times)

Offline Prober

  • Senior Member
  • *****
  • Posts: 10348
  • Save the spin....I'm keeping you honest!
  • Nevada
  • Liked: 721
  • Likes Given: 729
Re: South Korean lunar orbiter and lander
« Reply #20 on: 11/28/2013 04:25 am »
What is the source of that 75 ton thrust figure?
It appears in the arirang report linked above by Prober (note that story is from April, so it pre-dates the current moon rumor)
Quote
The KSLV-2 will use four, 75-ton engines whereas the Naro had just one engine that weighed 30-tons.
Regardless of whether they really meant mass or thrust for the 30 tons, I don't see how you get 30 tons out of any of the Naro 1 specs...

I thought for a second they might have been talking about scaling up the second stage engine, but in that case 30 tons would be far too high.

Given the above and the vagaries of translation "identical" could also mean a lot of different things other than an exact copy: Same propellants, same combustion cycle, equal ISP...

edit:
The 75 ton figure appears here http://www.kslv.or.kr/kslv2/kslv_biz.asp?mn=1

google translate will get you .... something ;)
yes, I believe your on to something to clarify.    Only new problem is that the translation also says 2 of the stages each @ 75 ton figure.   
 
2017 - Everything Old is New Again.
"I fear all we have done is to awaken a sleeping giant..." --Isoroku Yamamoto

Offline Danderman

  • Extreme Veteran
  • Senior Member
  • *****
  • Posts: 10288
  • Liked: 699
  • Likes Given: 723
Re: South Korean lunar orbiter and lander
« Reply #21 on: 11/29/2013 02:49 pm »
Korean Government Aiming to Launch Its Own Space Vehicles by 2020

http://www.astrowatch.net/2013/11/korean-government-aiming-to-launch-its.html

 Korea plans to develop a space vehicle on its own and launch it during the first half of 2020, and send up a lunar orbiter and a lunar lander for itself before the end of the same year. In the longer term, it is planning to explore Mars, asteroids, and deep space to join the ranks of space industry powerhouses. The Ministry of Science, ICT and Future Planning held the sixth National Space Committee meeting on November 26 and finalized its three major plans for space development – the Long-term Plan for Space Development, the Space Technology Industrialization Strategy, and the Modified KSLV Development Plan.

At the meeting, the government decided to hasten the development of the Korean Space Launch Vehicle (KSLV) by 15 months to complete it by June 2020. The purpose of the development of the KSLV, which stared in March 2010, is to put a 1.5 ton application satellite into low earth orbit at an altitude of 600 to 800 km. According to the new plan, the government is going to launch a test vehicle in December 2017, one year ahead of schedule, and then launch completed three-stage vehicles in December 2019 and June 2020. The government will also send up the lunar orbiter and lunar lander on the vehicles before the end of 2020, if the KSLV development turns out to be successful. All of the processes are to fulfill President Park Geun-hye’s promise to explore the moon on or before 2020.

Offline yoichi

  • Full Member
  • ****
  • Posts: 1106
  • Liked: 678
  • Likes Given: 1
Re: South Korean lunar orbiter and lander
« Reply #22 on: 12/28/2013 02:30 pm »


Offline Blackstar

  • Veteran
  • Senior Member
  • *****
  • Posts: 15287
  • Liked: 7822
  • Likes Given: 2
Re: South Korean lunar orbiter and lander
« Reply #23 on: 02/17/2015 09:20 pm »
Some news:

http://english.chosun.com/site/data/html_dir/2015/02/17/2015021701757.html

Korea Unveils Moon Rover


The Korea Institute of Science and Technology on Monday unveiled an unmanned rover that can search for rare minerals and metals on the moon's surface.

The rover will be sent to the moon on a Korean-made rocket in 2020 to conduct a mission similar to NASA's Curiosity Mars rover.

The rover is 50 cm wide, 70 cm long and 25 cm high, and weighs 20 kg, much lighter than China's 120 kg Jade Rabbit rover sent to the moon in 2013.
« Last Edit: 02/17/2015 09:24 pm by Blackstar »

Offline yoichi

  • Full Member
  • ****
  • Posts: 1106
  • Liked: 678
  • Likes Given: 1
Re: South Korean lunar orbiter and lander
« Reply #24 on: 02/19/2015 08:25 am »




Offline plutogno

  • Full Member
  • ****
  • Posts: 892
  • Toulouse, France and Milan, Italy
  • Liked: 240
  • Likes Given: 35
Re: South Korean lunar orbiter and lander
« Reply #25 on: 04/20/2016 05:35 am »

Offline savuporo

  • Senior Member
  • *****
  • Posts: 5152
  • Liked: 1002
  • Likes Given: 342
Re: South Korean lunar orbiter and lander
« Reply #26 on: 04/20/2016 07:05 am »
Gov't Introduces Equipment of Nation's 1st Lunar Orbiter

http://world.kbs.co.kr/english/news/news_Sc_detail.htm?lang=e&id=Sc&No=118433&current_page=
Something got lost in translation

Quote
The orbiter will carry three pieces of equipment, including a wide-field polaroid camera, a device that measures the moon’s magnetic field and a gamma-ray spectrometer.
They are sending a Polaroid camera ? :)
I think we had bit more detail in the other thread.
Orion - the first and only manned not-too-deep-space craft

Offline savuporo

  • Senior Member
  • *****
  • Posts: 5152
  • Liked: 1002
  • Likes Given: 342
Re: South Korean lunar orbiter and lander
« Reply #27 on: 05/13/2016 03:21 am »
http://sservi.nasa.gov/articles/south-korea-selects-payload-for-moon-probe/

Quote


South Korea’s first lunar space probe will launch in 2018 carrying a suite of instruments including a pantoscopic polarizing camera, a gammaray spectrometer, and a device to measure the Moon’s magnetic field. The spacecraft will circle in a polar orbit 100km above the Moon for more than a year, researching geographical features of the moon and its surrounding environment, and exploring the lunar surface for potential resources.

No Polaroids
Orion - the first and only manned not-too-deep-space craft

Offline Kryten

  • Full Member
  • ****
  • Posts: 735
  • Liked: 426
  • Likes Given: 33
Re: South Korean lunar orbiter and lander
« Reply #28 on: 08/29/2016 06:46 pm »
 NASA has published an announcement of opportunity for instruments on the 2018 orbiter.

https://www.fbo.gov/index?s=opportunity&mode=form&id=a50e070404067b481e371726dab25130&tab=core&tabmode=list&=

Offline Dalhousie

  • Senior Member
  • *****
  • Posts: 2766
  • Liked: 780
  • Likes Given: 1131
Re: South Korean lunar orbiter and lander
« Reply #29 on: 08/30/2016 07:43 am »
Gov't Introduces Equipment of Nation's 1st Lunar Orbiter

http://world.kbs.co.kr/english/news/news_Sc_detail.htm?lang=e&id=Sc&No=118433&current_page=
Something got lost in translation

Quote
The orbiter will carry three pieces of equipment, including a wide-field polaroid camera, a device that measures the moon’s magnetic field and a gamma-ray spectrometer.
They are sending a Polaroid camera ? :)
I think we had bit more detail in the other thread.

a polarising camera =/= polaroid camera
Apologies in advance for any lack of civility - it's unintended

Offline Galactic Penguin SST

Re: South Korean lunar orbiter and lander
« Reply #30 on: 08/30/2016 11:12 am »
NASA has published an announcement of opportunity for instruments on the 2018 orbiter.

https://www.fbo.gov/index?s=opportunity&mode=form&id=a50e070404067b481e371726dab25130&tab=core&tabmode=list&=

This thing is really flying in 2018? I don't see any significant hardware being built or a ride being booked yet. And how on Earth can it still receive new instruments and test it AND integrate it in less than 2 years time?
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 plutogno

  • Full Member
  • ****
  • Posts: 892
  • Toulouse, France and Milan, Italy
  • Liked: 240
  • Likes Given: 35
Re: South Korean lunar orbiter and lander
« Reply #31 on: 09/14/2016 05:22 pm »
NASA Seeks Science Instruments to Sponsor on Korean Space Agency Lunar Orbiter

http://www.nasa.gov/feature/kplo-ao

Offline savuporo

  • Senior Member
  • *****
  • Posts: 5152
  • Liked: 1002
  • Likes Given: 342
Re: South Korean lunar orbiter and lander
« Reply #32 on: 09/15/2017 12:23 am »
And these instruments are now of course selected and slated to fly

https://spaceflightnow.com/2017/04/28/u-s-instrument-team-to-fly-camera-on-south-korean-moon-mission/

Quote
A camera developed by scientists at Arizona State University will join four foreign-built instruments on South Korea’s first lunar orbiter set for launch at the end of 2018, NASA announced Friday.

NASA selected the ShadowCam instrument from proposals submitted by U.S. science teams. Developed by Arizona State University and Malin Space Science Systems, ShadowCam will map terrain and search for evidence of frost or ice deposits inside eternally dark craters near the moon’s poles, scientists said.

ShadowCam will launch with four South Korean-made instruments on the Korean Pathfinder Lunar Orbiter, which is set for liftoff in December 2018.

The instrument is a rebuild of the narrow-angle camera on NASA’s Lunar Reconnaissance Orbiter, but with one major change.

“The telescope and much of the electronics will be identical,” said Mark Robinson, ShadowCam’s principal investigator at Arizona State University. “The big difference is swapping out the current image sensor for one that is 800 times more sensitive, allowing high resolution imaging within permanently shadowed regions, something the Lunar Reconnaissance Orbiter Camera cannot accomplish.”
Orion - the first and only manned not-too-deep-space craft

Offline savuporo

  • Senior Member
  • *****
  • Posts: 5152
  • Liked: 1002
  • Likes Given: 342
Re: South Korean lunar orbiter and lander
« Reply #33 on: 09/17/2017 06:18 pm »
And

http://www.spacetechasia.com/kari-awards-us5-7-million-contract-to-mda-for-lunar-mission-communications-subsystems/
Quote
South Korea’s space agency, the Korea Aerospace Research Institute (KARI), has awarded a contract worth over US$5.7 million (CA$7 million) to Canadian company MacDonald, Dettwiler and Associates (MDA).

Under the contract, MDA will provide KARI with the communications subsystems needed for the Korean Lunar Exploration Program, which aims to develop and launch a lunar orbiter by late 2018. MDA’s subsystems will provide relay information between KARI’s proposed lunar orbiter and the ground station on earth.
Orion - the first and only manned not-too-deep-space craft

Offline Kryten

  • Full Member
  • ****
  • Posts: 735
  • Liked: 426
  • Likes Given: 33
Re: South Korean lunar orbiter and lander
« Reply #34 on: 10/03/2017 11:18 am »
https://www.thalesgroup.com/en/worldwide/space/press-release/thales-alenia-space-provide-x-band-transmitter-south-koreas-kplo-lunar
Quote
Madrid,  October 2nd, 2017 – Thales Alenia Space has signed a contract with the Korea Aerospace Research Institute, KARI, to deliver the communications equipment for the Korea Pathfinder Lunar Orbiter mission (KPLO), a lunar probe scheduled for launch on December 2020. These equipment will be in charge of transmitting back to Earth the data collected by the instruments on-board the orbiter.
Two years delay; this should make it possible for it to launch on KSLV-2.

Offline Lucid Nonsense

  • Member
  • Posts: 9
  • South Korea
  • Liked: 5
  • Likes Given: 0
Re: South Korean lunar orbiter and lander
« Reply #35 on: 10/21/2017 03:28 pm »
Excuse me but is it possible to run by a few things concerning the KSLV-2 by the more knowledgeable members of this forum?

Firstly, the origin of the '75ton' figure. Could it simply be 735kN of thrust divided by 9.8N? If so, why???

Secondly, other than SpaceX and the Merlin Engine architecture, what are the benefits of choosing to develop a RP-1/LOX GG cycle engine as a first 'big-boy' engine attempt over other fuels and cycles. (Staged-combustion and cryogenics are obviously too ambitious, but were there any alternatives?)

While the engine seems inspired by Merlin, (assuming my 735kN leap of logic holds true) the LV design seems very Ariane 1~4 like. What would a comparison in performance look like?

Ariane 4 used SRBs. Considering South Korea would be politically hard-pressed to manufacture a Solid Rocket Motor large enough to potentially be threatening Balistic Missile, what would a KSLV-2 with 2 or 4 single engine liquid booster stages (using 1st or 2nd stage diameter tooling) look like performance wise?

Finally, what would a KSLV-3 with a 7 or 9 engine (I'll come clean and admit I'm thinking of odd numbers due to RTLS/Reusability) 1st stage look like? Would it have a single engine 2nd stage or more? What about the 3rd? What would the overall LV design be?

{Also, extraneous extra, there are unofficial plans to reduce the weight and increase the thrust (about 880kN or more) of the 1st stage engine and develop a replacement ORSC 3rd stage engine (80~100kN) for better ISP, how feasible would these proposals be and what kinds of performance improvements would there be in terms of payload mass and such.}

Offline Kryten

  • Full Member
  • ****
  • Posts: 735
  • Liked: 426
  • Likes Given: 33
Re: South Korean lunar orbiter and lander
« Reply #36 on: 10/21/2017 03:53 pm »
Ariane 4 used SRBs. Considering South Korea would be politically hard-pressed to manufacture a Solid Rocket Motor large enough to potentially be threatening Balistic Missile, what would a KSLV-2 with 2 or 4 single engine liquid booster stages (using 1st or 2nd stage diameter tooling) look like performance wise?
The warhead weight limitation for SK missiles was recently dropped; there's still a formal range limit, they can de facto produce missiles, and thus motors, of any size now.

Offline Lucid Nonsense

  • Member
  • Posts: 9
  • South Korea
  • Liked: 5
  • Likes Given: 0
Re: South Korean lunar orbiter and lander
« Reply #37 on: 10/22/2017 04:07 pm »
Ariane 4 used SRBs. Considering South Korea would be politically hard-pressed to manufacture a Solid Rocket Motor large enough to potentially be threatening Balistic Missile, what would a KSLV-2 with 2 or 4 single engine liquid booster stages (using 1st or 2nd stage diameter tooling) look like performance wise?
The warhead weight limitation for SK missiles was recently dropped; there's still a formal range limit, they can de facto produce missiles, and thus motors, of any size now.

While the easing of warhead weight restrictions have still not officially occurred, even if the de jure limitation disappears, there would still be de facto political pressure from other countries. In any case Korea aims to use liquid boosters.

On the 75ton thrust mystery front, it may very well be the case that 75tons refers to 75tonf (75x1000kgf). Why Korean engineers are not using SI units still remain an unsolved mystery.

Offline sanman

  • Senior Member
  • *****
  • Posts: 5974
  • Liked: 1312
  • Likes Given: 8
Re: South Korean lunar orbiter and lander
« Reply #38 on: 10/22/2017 08:09 pm »
Korean new rocket family images.
http://japanese.joins.com/article/758/178758.html  (Japanese article)

They may change the Octaweb engine arrangement   ;D

It looks like they're going from Falcon-1 to Falcon-4 to Falcon-9 to FalconHeavy.
Is there any reusability planned somewhere along the way? Or not at all?

Offline Patchouli

  • Senior Member
  • *****
  • Posts: 4490
  • Liked: 253
  • Likes Given: 457
Re: South Korean lunar orbiter and lander
« Reply #39 on: 10/25/2017 01:08 am »
Depends can the engine be made to air start otherwise I'd expect something similar to ULA's recovery though getting it back to land would be better.

 

Advertisement NovaTech
Advertisement Northrop Grumman
Advertisement
Advertisement Margaritaville Beach Resort South Padre Island
Advertisement Brady Kenniston
Advertisement NextSpaceflight
Advertisement Nathan Barker Photography
1