I don't think you did that right. The energy to get to (1/4)V is (V2)/16. The energy to get to V is (V2)/1. So your payload is only 1/16th of the way there or 6.25%. Agreed about the rocket equation though - that first…
I don't think you did that right. The energy to get to (1/4)V is (V2)/16. The energy to get to V is (V2)/1. So your payload is only 1/16th of the way there or 6.25%. Agreed about the rocket equation though - that first…