Would'nt it be better to let the jet exhaust exit further out the circle?? Nearer the tips of the blade??
Then it would need less energy to turn the blade right??
No Exactly. after I explained that as it is the end of the blade mount these outlets, it turns these very slender blade, which introduces them to an extremely dangerous vibrations, preventing restful flight. Besides, most of the energy would be lost in a very long thin hole in the middle of the blade. So with a total that is not profitable, despite its larger radius. But here safety is a priority and not efficiency. Such " supposedly efficient " has been....Holm86 wrote:Would'nt it be better to let the jet exhaust exit further out the circle?? Nearer the tips of the blade??
Then it would need less energy to turn the blade right??
No the Rotordyne had a gas-driven rotor, like your design. The Eurocopter has a jet engine driving the rotor through a free turbine & gearbox so the main rotor creates torque that the lateral props have to counteract. So at zero speed one prop is blowing air backwards and the other forwards. As the chopper speeds up, the thrust differential between them decreases and no doubt at some point both props are pushing the chopper forwards, though there would still need to be a net thrust differential.Feliks wrote:
In the 50 theses similar already done. of hard and even had the gear, not have . But it was not a very safe (vibration propeller blades ). for my Heron Apache, also without a gearbox, but it is completely safe. Prop blades are the same as in the best designs helicopters. But the gear no longer needed....