You will be surprised by the very high power delivered by these small and very robust, but light weight (57g with power cables) brushless motors with rotating case suitable for micro helicopters and fast aerobatic models of 300-400 size. The hardened steel 3,2mm diameter shaft is supported by two large ball bearings which ensure very good mechanical reliability with front or radial mounting. As a result of using the latest ferromagnetic materials those  motors offer extremely high efficiency and high load capability for their weight. with the high quality of manufacturing, reliability and performance are the best out runners available in the market. A feature of the motor is provision for radial mounting .
Recommended to use for helicopters up to 850 g

Specification
No. Of cells : 5 - 7, 2 - 3x Li-Poly
RPM/V : 1390 RMP/V
Max. efficiency  :82%
Max. efficiency current : 14 - 22 A (>75%)
No load current :  10 V 1,2 A
Current capacity : 28 A/60 s
Internal Resistance:  45 mohm
Dimensions :28x30 mm
Shaft diameter : 3,2 mm
Weight with cables:  57 g
Recommended model weight: 300 - 1000 g (heli up to 850 g)
Recommended prop without gearbox : 2xLi 7"x5"/ xLi 5"x5"/3xLi - heli