The B50-9S Competition Kv 3650 with 6.7:1 gear drive is specially designed for Hotliner, F5B and similar models on 4S LiPos.
The integrated high-performance fan cools the B50 Competition engines in the most effective way. The running noise is also kept to a minimum with asymmetrically positioned air outlet holes reduced. The outer housing design with milled cooling grooves offers perfect heat dissipation with the lowest weight. The B50 Competition is equipped with larger ball bearings than its predecessor Hacker B50. This significantly reduces friction and optimizes service life. In addition, a stronger, internal shaft with a 6mm diameter prevents vibrations at extreme speeds. The front and rear end shield is screwed on. The shaft is equipped with an integrated pinion. The increased power output of the B50 Competition engines is achieved via a high-performance gearbox with a 6mm shaft guaranteed. As a further special feature, all B50 Competition engines are equipped with segmented high-performance rotors made of optimized magnetic material.
