China's Space Program News Thread

[antiterror13]

The US doesn't need to redevelop a new Saturn. It is developing

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, which has 20% more thrust than Saturn. SLS uses LH2/LOX for fuel though.

Thats why I wrote "new" Saturn V ... I meant SLS

LM-5 also uses LH2/LOX .....

 

[antiterror13]

To set the record straight, the Saturn V's F1 engines use the same kind of fuel the Long March 5 does (RP1 + LOX) but with far greater thrust (although with lower efficiency). One of the reasons why Saturn V was not "revived" is because its blueprints were destroyed (interestingly, its F1 engines are being restarted for the F-1B engine, once considered for the SLS).

nope, LM-5 (also LM-6 and LM-7) doesn't use RP1 ... it uses LH2/LOX and kerosene

 

[SinoSoldier]

nope, LM-5 (also LM-6 and LM-7) doesn't use RP1 ... it uses LH2/LOX and kerosene

RP-1 is a type of refined kerosene. Only the upper stages of the LM-5 use LH2/LOX.

 

[antiterror13]

RP-1 is a type of refined kerosene. Only the upper stages of the LM-5 use LH2/LOX.

True ... but RP-1 is not the same as kerosene. RP-1 has a fraction of toxicity and carcinogenic (unlike kerosene or LH2)

 

[Quickie]

Interesting trivia: the LM-5 has the second highest GTO payload capacity in the world (14 tons), after the Delta IV heavy (14.22 tons).

Imo, the significance of the stated max payload is quite subjective. If you look at the history of the launches of the heavy launchers, the actual payload was actually way less than the stated max payload.

 

[taxiya]

RP-1 is a type of refined kerosene. Only the upper stages of the LM-5 use LH2/LOX.

Both first and second stages of LM-5 uses LH2/LOX. Only the boosters use Kerosene/LOX. That can not be mistaken from the outside looking as the two stages are 5 meters in diameter to house the LH2/LOX engines, while the boosters are 3.5 meters in diameter to house the Kerosene/LOX engines.

 

[antiterror13]

Imo, the significance of the stated max payload is quite subjective. If you look at the history of the launches of the heavy launchers, the actual payload was actually way less than the stated max payload.

perhaps they never need to do that

 

[escobar]

SJ-17 is based on DFH-4S platform...

 

[antiterror13]

so what special of SJ-17 ?

 

[Quickie]

perhaps they never need to do that

Or the launcher can be claimed to have a higher max payload, but they would rather not go there because of a higher chance of launch failure?