I am working on a range extender for full size electric aircraft. It is a turbine located under the cowling, protruding only 8 inches. On my full size static model, the turbine can produce 600 watts with the prop blast v measuring 38 mph. If we could fly the plane (we can't, no wings) at 80 mph, would the prop blast increase (38 + 80 mph), stay the same, or maybe decrease? There would be all sorts of mitigating factors -- headwind, angle of attack, ground effect, etc., but as a foundation theory -- any ideas? Thank you so much.