B40 Series-The Hacker B40 Series motors are designed for medium sized R/C models, were a Small and Powerful Motor system is required. The 4.4:1 Planetary Gearbox incorporates Ceramic bearings for low friction and long life. From Scale Planes to Sport Models to Competition Gliders the Hacker B40 Series offers less weight, more power and the best performance for your model. We recommend the for use with the B40 Series Motors

C40 Series- The C40 series motors have been specially developed for High RPM, High Temperature applications. R/C Racing Cars and Smaller Helicopters that use 6-10 NiMh cells or 2-3 LiPoly are excellent candidates for the Hacker C40 Brushless System. These motors are Super Efficient , but produce Huge amounts of Power (300% more than a Brushed Modified!!!). Available in both "T" (Short) and "L" (Long) versions. The C40T Motor bolts directly into any "540" Mounting location and feature a 1/8" Shaft. The C40L is a Longer Motor that also uses the "540" mounting pattern and a 1/8" shaft. We recommend the Hacker Master Series Controllers for use with the C40 Series Motors

B50 Series-The Hacker B50 Series motors are designed for R/C models, were a Very High Power Motor system is required. The 6.7:1 Planetary Gearbox incorporates Needle bearings on all planetary gears for low friction and long life. From Hotliners to Large Gliders to 3D Aerobatic models the Hacker B50 Series will achieve very High Thrust with 10 to 16 cells. We recommend the Hacker Master Series Brushless Controllers  for use with the B50 Series Motors