Built for maximum strength to weight for use in FAI Unlimited class record attempts, this is something of a do-all hub. It has endured tests up to 1 in-oz and is full capable of handling the flight loads of an F1M/OPP launch. The Unlimited Hub weighs 120 mg and features a beefy .015″ prop shaft and driver arms. The .011″ torsion spring is built to handle the set point torques required by heavy rubber motors.
When ordering, please specify hook design (Reverse S hook or Standard) and whether you would like spar tubes (please specify diameter). Shaft and driver arms can be increased to .020″ at no extra charge.
J&H Aerospace propeller hubs are unavailable at this time. We hope to resume production in 2019.