Hello! I was hoping the Vorts could help me with this. Roger Shawyer, at minute 2:56 in this video, claims that the next generation EM Drive could generation 1 tonne of thrust per kilowatt of power. This means that a 1 tonne car should be able to hover above the ground for the price of one kilowatt. However, my calculation shows that to be about 48 times a theoretical maximum.
Here is the video where he makes the claim at 2:56. http://tinyurl.com/ko5v6h7 But here is my calculation for a theoretical maximum, calculated two different ways: - A joule is a watt-second - A watt is a joule / second - The power required to hover an object is the same power required to increase the speed of the object from rest, in a weightless environment, to 9.8 m/s in one second. We know this because the pull of gravity is 9.8 meters/second2. - The kinetic energy in an object travelling at 9.8 m/s = 1/2 * m * v2. So for a car of 1000 kg, the energy = 1000 / 2 * 9.82 = 48,020 joules = 48 kilowatts to do this in one second. - This power should be 1/2 the power to raise an object of the same mass, to a height of 9.8 meters in one second, since it would require twice as much energy to do this. - The formula to determining how much energy it takes to raise something to height = E = m * g (gravitational constant) * h = 1000 * 9.8 * 9.8 = 96,040 watts-seconds = 96 kilowatts to do this in one second. So it agrees with the previous result. So, I don't understand how any device could hover an object with the mass of a tonne for less than a theoretical 48 kilowatts. Any thoughts on this would be appreciated. Craig Haynie ( Manchester, NH)
