![]() The two ways to avoid this is with a lot of torque on the command system or a good set of winglets. When gravity turning, the rocket may be pushed to much by the air and flip the rocket. Having more than 3000 m/s of deltaV is good, since the extra fuel can be used in space. If the stage has somewhere between 23 deltaV, adding boosters can push up the deltaV amount over 3000 m/s. I have another guide on deltaV that explains how to use that calculator and the meaning and use of deltaV. The total deltaV should be more than 3000 m/s, and it would be helpful is the stage has more. When planning this stage, this deltaV calculator will help to make sure that you get it right the first time. This stage is the one of the most critical stages, and the most important one to get right. Orbital stage - Engines on this craft can be chosen at will, but this particular stage must at least have enough fuel to get into and maneuver freely in the orbit. Small engines like the terrier or poodle might be needed so the landing gear touch the ground first, and not the bottom of the engine. Generally, the stage must be easily manuverable and light. If your landing on a non-atmospheric body like the mun, the stage has to be able to land slowly upright on the surface. Landing stage - This stage has to do a lot of things. When re-entering the atmosphere, use the remaining fuel to slow down, then separate the stage so the payload can fall back down to the ground without the weight of the tanks and engine As long as the stage as enough fuel to get all the way back to kerbin, then engine type and ISP doesn't matter to much. Re-entry stage - This kind of rocket is more free to change. I would recommended only having one engine on this stage to make the craft more versatile. If the stage is the last before the craft re-enters Kerbin, then stage might not have as many restrictions on it compared to a other-body landing stage. ![]() The size and scope of the stage depends on the destination. The destination stage is the first rocket stage that you build.
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