3 Bladed Contra Drive II AVR Propellers II New Standard II Adverrun XS

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Hi Everyone; here the New Contra Props, AVR propellers, lot of work developing this new system, it will be the new standard for ContraDrive. Its a Game Changer. The feelings since first flights were very good: Constant Speed, more than with 2 blade props falcon or Mejlik, the change its so big.