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Hi, Let me to say 1. Main problem - it is calculate main parameters Dia of rotor, power, parameters of transmission. ULH is very sentitive foe correct (optimum) parameters. The second step chose of prototype ULH and design... My book "Designing a homebult ULH" will can deside prablem in...

G1 is "garbidge", because construction plan G1 contents many seriosly mistakes Who will be used this plan lost money and self-murderer

Hi, 1. For built homemade helicopter for of all you have to determine main parameters: Dia. of main and tal rotors, power, parameters of transmission...and only later - disaing of ULH 2. We have wide choice of structures of ULH... see internet. It is no problem. 3. When you define main...