does a propeller screw itself on air or is it just reaction

[GregHouse]

you are just being plane rude imo raids has a curious mind and those have been the most well remembered after time because you dont find new things by following others ideas but making owns. For Riad my advise is not give up but develop your skill it takes time and meanwhile you can maybe have dayjob and save money for future when you make breakthrought and need financing