Recent content by blimpyway

just apply impulse conservation/ Newton action and reaction law... from: force x time_it_is_applied = variation_of_speed x mass_of_accelerated_body results: Force = air speed x mass flow of the fan.

to accelerate from 20 to 30 km/h you need to apply at least the torqueneeded to maintain constant speed at 30km/h. a vehicle movement there are these forces in equilibrium: - propulsion and braking forces from by engine/cyclist/propeller and brakes - aerodynamic drag, given by forward speed...

Hi, I am interested in these pumps but I have no idea what kind of pressure/flow ratios they can get. Can you please tell me for what measured values you got for 0.5% efficiency? Thanks, cezar