O.S. Speed 91HZ-R 3d Helicopter engine91HZ R 3D Speed Features: Designed for all out, aggressive 3D competition. Offers incredibly stable mid range torque for awesome 3D flight Carburetor inlet enlarged to 11. 2 mm Exhaust port timing set at 165 Combustion chamber shaped to match the big bore carburetor and advanced exhaust cylinder timing Demand Regulator System (DRS) guarantees a steady fuel supply to the carb at any attitude, on a full or empty tank and during the most abrupt throttle

●Socket Screw x 1

Azure Power 105 PRO Heli Tail Blade 106mm

●600DFC Main shaft(ESP) x 2(172

an increase in collective pitch will automatically be applied to arrest the descent rate that is no doubt taking place

5mm)●Bearing MR52ZZ x 8(Φ2xΦ5x2

Engine pinion 17T

●Must with H7NT004XXW 700N DFC Torque Tube

•Copper Sets（1PSC）

XLpower Specter NME

PORT-C[UART3]

and no rust

A step above coreless motor technology