Thanks I can imagine the forces involved- no problem there. To get to the question though, what is the energy equation? There is a fine example of what I am talking about in this video. It shows just such a craft as envisaged, producing thrust to raise a mass, but how was the energy...
Thanks. What I intended was to make a craft like a rocket, but which could hover. The motor could be any power plant, capable of powering a jet of water.
The water would be supplied to the craft on a continuous basis, so the craft would remain at constant mass. The power would also be...
Homework Statement
I would like to be able to calculate the energy use per second, to maintain a rocket of given mass, at zero velocity, i.e. hovering, at, say, sea level.
Homework Equations
I have Thrust = Force times velocity, but can't work out the energy due to the velocity of the...