![]() ![]() ![]() Either use ‘mass’ or ‘(force of) gravity’, but definitely not ‘weight’, okay? Let’s agree not to use the word ‘weight’ anymore. Hint If you see the word ‘weight’, simply substitute it for ‘force of gravity’. Weight is a force (N) and represented by a vector.For interplanetary rocket design, we need to be more accurate, so: Coyote is 6 times less on the Moon than on Earth.Īs I am not likely to leave the planet anytime soon kilograms will do just fine 1kg weighs not much really, 10kg weighs quite a bit more and 1000kg weighs a lot. The force exerted by a 50kg ACME anvil dropped on Wile E. The Moon’s gravity is 1/6th that of Earth’s gravity. ![]() Even though on earth we express weight in kilograms, it really should be expressed as a force in Newton (N). Weight is an indicator of how heavy an object ‘feels’. Thousand kilograms is called one ton or tonne (1t). In space, there is only Thrust and the Gravitational pull from planets.īefore we start looking at these forces, let’s get something out of the way first. There are four forces acting on a craft when in the lower atmosphere within gravity: Thrust, Weight, Lift and Drag.ĭrag and Weight = Bad, although they do come in handy at times.įorces during atmospheric vertical take-off. What engines to use? How much fuel to take? What shape should the craft be? Stack decouplers or Radial decouplers? Solid booster or Liquid Fuel Engine? Let’s start with some basic concepts. Kerbal Space Program – How to build a rocket ![]()
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