"Andy Burns" wrote in message
o.uk...
dennis@home wrote:

You won't explain it from that description as its rubbish.
They are claiming they can develop thrust by removing energy from the
vehicle and that gives the vehicle more energy to make it faster

No, they are claiming they can develop thrust by removing energy from the
wind by slowing it down as it passes through their propeller, the reaction
pushes the vehicle forwards, which spins the wheels, which spins the
propeller ... I think!


The vehicle is going faster than the wind, so the air that passes through is
not the wind, it is the wind - the vehicle speed which is some negative
value as the vehicle is going faster than the wind.

How do extract energy from the wind when they are effectively going into the
wind *they* are generating by moving the vehicle to make the vehicle gain
energy and go faster?

This is in the same area as the numpties that think they can run a car on
water by splitting it into hydrogen and burning it by using the "spare"
power in the alternator. You can even see videos of them doing it (but none
without the batteries being connected).