Recent content by jsa0100

I have calculatet that i need 9.8W and with 50% and 80% efficiency I get around 25W. In real life this types of planes needs around 200w. So what am i missing?

I am trying to calculate the necessary amount of power (watts) for a RC plane to hover or to move vertically up. The electro engine has an efficiency of 80% and the propeller efficiency is 50%. The plane weight is around 1 kg.

Sorry i ment Electromagnetic radiation (Radio and Light). By loosing energy do you mean that the wavelength will be longer?

So from an electromagnetic source, will the photons travel "forever" or will some of them "collapse" after a while ?