Author Topic: North Korea Space  (Read 12810 times)

Offline Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 12014
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 2627
  • Likes Given: 379
Re: North Korea Space
« Reply #20 on: 03/20/2017 08:16 AM »
This engine used four  vernier thruster, Why ?

The verniers are for thrust vector control. The main nozzle is fixed in place. Thor used a similar system, but with only two verniers.

Quote
it's imply use in second stage,

Then what is the first stage? I think this will be used on a first stage initially.

Quote
But 80 tons trust ? i have not found any information on thrust value of this engine.
If it's  really 80 metric tons then North Korea got chance to build rocket that bring 120 Kg in low orbit
Or SLBM in size of R-29 SLBM... 

That could be the plan. The next step might be to cluster the engines Space-X style and then use this engine on an upper stage. Another possibility is to cluster several cores.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline edkyle99

  • Expert
  • Senior Member
  • *****
  • Posts: 12566
    • Space Launch Report
  • Liked: 3363
  • Likes Given: 559
Re: North Korea Space
« Reply #21 on: 03/21/2017 12:18 AM »
This engine used four  vernier thruster, Why ?
The verniers are for thrust vector control. The main nozzle is fixed in place. Thor used a similar system, but with only two verniers.
The difference was that Thor's main chamber swiveled too, but of course it could only provide pitch/yaw.  The twin verniers added roll control, and they also provided three-axis control during a brief vernier-only phase after the main engine shut down.

If the main chamber is fixed, four verniers are typically used to provide three-axis control.  There are many examples, most often in Russia, China, India, etc.

 - Ed Kyle

Offline russianhalo117

  • Senior Member
  • *****
  • Posts: 3650
  • AR USA / Berlin, DE / Moscow, RF
  • Liked: 655
  • Likes Given: 416
Re: North Korea Space
« Reply #22 on: 03/21/2017 01:05 AM »
This engine used four  vernier thruster, Why ?

The verniers are for thrust vector control. The main nozzle is fixed in place. Thor used a similar system, but with only two verniers.

Quote
it's imply use in second stage,

Then what is the first stage? I think this will be used on a first stage initially.

Quote
But 80 tons trust ? i have not found any information on thrust value of this engine.
If it's  really 80 metric tons then North Korea got chance to build rocket that bring 120 Kg in low orbit
Or SLBM in size of R-29 SLBM... 

That could be the plan. The next step might be to cluster the engines Space-X style and then use this engine on an upper stage. Another possibility is to cluster several cores.
Until ULA DII retires its verniers still play its original role going back to the first Thor.

Offline josespeck

  • Member
  • Posts: 41
  • Liked: 6
  • Likes Given: 5
Re: North Korea Space
« Reply #23 on: 03/21/2017 04:00 PM »
But 80 tons trust ? i have not found any information on thrust value of this engine.
If it's  really 80 metric tons then North Korea got chance to build rocket that bring 120 Kg in low orbit
Or SLBM in size of R-29 SLBM...

Falcon1 46 t  ----->  180-670 kg to LEO (https://en.wikipedia.org/wiki/Falcon_1)

NorthKorea New Engine 80 t ----> 120 kg to LEO ?
« Last Edit: 03/21/2017 04:01 PM by josespeck »

Offline Michel Van

  • Full Member
  • *
  • Posts: 103
  • Liege, Belgium
  • Liked: 30
  • Likes Given: 65
Re: North Korea Space
« Reply #24 on: 03/22/2017 03:19 AM »
But 80 tons trust ? i have not found any information on thrust value of this engine.
If it's  really 80 metric tons then North Korea got chance to build rocket that bring 120 Kg in low orbit
Or SLBM in size of R-29 SLBM...

Falcon1 46 t  ----->  180-670 kg to LEO (https://en.wikipedia.org/wiki/Falcon_1)

NorthKorea New Engine 80 t ----> 120 kg to LEO ?

That's base on assumption that new North Korean rocket is like a R-29 SLBM
off corse it they build a Titan II size ICBM the Payload is now 3 tons

Offline Blackstar

  • Veteran
  • Senior Member
  • *****
  • Posts: 10750
  • Liked: 2272
  • Likes Given: 1
Re: North Korea Space
« Reply #25 on: 04/20/2017 10:36 PM »
http://foreignpolicy.com/2017/04/19/the-united-states-isnt-hacking-north-koreas-missile-launches/

"Since 2014, about three-quarters of Pyongyang’s launches have succeeded. My colleague Shea Cotton keeps a database of every North Korean missile launch. Of the 66 missiles that North Korea launched during 2014 and after, 51 have succeeded. If hacking is playing any role, it is defeating a trivial number of missiles. A .230 average isn’t enough to keep you in the major leagues. And it’s a lousy batting average against nuclear-armed missiles."

Re: North Korea Space
« Reply #26 on: 05/19/2017 07:50 AM »
North Korea’s Sohae Satellite Launching Station: Facility Upgrades Continue

http://38north.org/2017/05/sohae051817/








Re: North Korea Space
« Reply #27 on: 06/16/2017 09:14 PM »

Re: North Korea Space
« Reply #28 on: 06/28/2017 09:35 AM »

Offline zhangmdev

  • Member
  • Posts: 18
  • Liked: 4
  • Likes Given: 0
Re: North Korea Space
« Reply #29 on: 07/04/2017 08:25 AM »

it's imply use in second stage,


The main engine nozzle seems too small for 2nd stage use.

A few examples of Chinese YF-24 engines, 4 tiny vernier thrusters, 1 huge main engine.

http://www.b14643.de/Spacerockets/Specials/Chinas_YF-21-24_engines/index.htm

Offline Lar

  • Fan boy at large
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 8156
  • Saw Gemini live on TV
  • A large LEGO storage facility ... in Michigan
  • Liked: 4909
  • Likes Given: 3329
Re: North Korea Space
« Reply #30 on: 07/04/2017 02:21 PM »
A couple of posts about missiles were moved to the correct topic (we have a topic for DPRK missiles, in the suborbital area)

http://forum.nasaspaceflight.com/index.php?topic=40159.0
"I think it would be great to be born on Earth and to die on Mars. Just hopefully not at the point of impact." -Elon Musk
"We're a little bit like the dog who caught the bus" - Musk after CRS-8 S1 successfully landed on ASDS OCISLY

Online docmordrid

  • Senior Member
  • *****
  • Posts: 4208
  • Michigan
  • Liked: 1387
  • Likes Given: 1
Re: North Korea Space
« Reply #31 on: 08/14/2017 04:08 PM »
This International Institute for Strategic Studies analysis reports it's a single chamber RD-250 variant,

Link....
« Last Edit: 08/14/2017 04:09 PM by docmordrid »
DM


Tags: