Thursday, September 11, 2025

Orbital Flight Trajectory

I would like to say few words on orbital flight trajectory. The orbiting of an object relies on the centrifugal force counter acting the gravity. When a rocket propels itself away from the earth, the earth's gravity effecting on the rocket doesn't change much within couple of hundreds of kilometers. On the other hand, if that thrust is diverted to increase the rocket's horizontal speed, the centrifugal force would reduce the effect of gravitation on the rocket. That's why the rocket trajectories are designed to increase the rocket's horizontal speed even at denser lower atmosphere.

A complex alternative to reach orbital speed would include the use of light weight but sturdy wings on the first stage of the rocket. Close to 1 g of the rocket's thrust is lost to counteract the gravity. The wings would reduce that need while they would contribute to the lift passively. However, they would induce drag. That's why I stated that the design would be complex. A perfect design which would have less drag compared to the positive lift it generates can be developed. I think it is totally feasible. One benefit of the wings is that they would help the first stage of the rocket return to the launch site safely with less propellent and less complex engines.

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