The XTRM 2826/06 is a 730 KV Brushless Outrunner with a current capacity of 37 amps @ 60 seconds. A maximum efficiency of 82%, a no load current @ 10vdc of 1.5 amps and an internal resistance of 59 Mohms. This outrunner has a 5mm shaft and is designed to run on 8-14 NiCad/NiMH cells or 3-5 LiPo cells. Prop recommendations are 14x7 prop on 3 cells, 13x8 on 4 cells, or a 11x8 on 5 cells. Includes Radial Mount, 5mm Collet type prop adapter and 3.5mm Gold Plated Bullet Connectors. This motor weighs 6.1 oz. and the dimensions are 35 x 50mm.