Take a look at Falcon 9 (24:770) > Delta 4 Heavy (29:961)
Replying to: Pls,U don't hav the basics1)Payload:takeoff WT ratio depends on a no.of factors -- InTheNameOfJesus	Post Reply Forum

motif

07/19/2021, 20:53:15

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even though D4H's engine has a higher specific impulse than F9.

When I say the payload is determined by the lift off thrust, it means strapping three F9 core together as Falcon Heavy, you get higher payload even if your engine is less efficient.

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Followups

Where did u get the'961'from'Delta 4 Heavy (29:961)'? - InTheNameOfJesus 07-20 06:38 | 259 bytes | +1
- Both figure lift off thrust - motif 07-20 22:03 | 93 bytes | +1
  - U missed a no.of important things.Ur'Payload:thrust'ratio also overlook many - InTheNameOfJesus 07-21 17:24 | 7285 bytes | link +1
    - The same apply to your comparison of 921 to CZ-9B - motif 07-21 20:54 | 450 bytes | +1
      - If I missed something bcos they're not there in the'leaked infos',as u said - InTheNameOfJesus 07-22 13:32 | 393 bytes |