Smith and Wesson 686 Plus Dual Aft
Smith and Wesson 686 Plus The Most Satisfying Pipe Threading Tool Coaxial rotors cancel out torque and boost lift without needing a tail rotor. The blades are perfectly timed to avoid collision. So why With dual propellers, you have two propellers per engine. The forward propeller is a four bladed prop and the aft propeller is a ...