This is the .25 Brushless Electric Motor from O.S. Motors.

FEATURES: For .20 - .25 size airplanes
          Stainless steel prop shaft
          Rigid rear mounting design
          Centrifugal fan design with angled ventilation holes draws air
            through the motor and across the windings and magnets for improved
            cooling

INCLUDES: .25 Brushless Electric Motor with Backplate, four Phillips Head
            Mounting Screws, 3mm Gold Plated Male Plugs attached to leads,
            three 3mm Female Plugs with Shrink Wrap, Prop Adapter and
            Instruction Sheet

REQUIRES: 60A brushless ESC

SPECS:    Rated Power: 440W
          Rated Voltage: 11.1 - 14.8V
          Rated Current: 30 - 40A
          Maximum Current (10 sec): 75A
          No Load Current: 1.9A
          Phase Resistance: 21.4 miliohms
          Maximum Efficiency: 85%
          kV: 1200
          Poles: 14
          Shaft Diameter: 0.20" (5mm)
          Shaft Length: 0.45" (11.5mm)
          Weight: 5.46oz (155g)
          Lead Wire Length: 3.5" (90mm)
          Length of Motor Can: 1.7" (43.3mm)
          Diameter of Motor Can: 1.47" (37.5mm)
          Length/rear of Motor Can to Prop Washer: 2.3" (58mm)
          Prop Washer Diameter: 0.87" (22mm)
          Thickness of Motor Mount: 0.12" (3mm)
          Width of Motor Mount: 1.96" (50mm)
          Height of Motor Mount: 1.96" (50mm)

          Performance for this motor with different props and LiPo cells is as
            follows (all data with 60A ESC):
          Prop Size              Max Electric Current      LiPo Cells
          9.5 x 7.5                    34A                     3S
          9.5 x 8                      35A                     3S
          9 x 6                        48A                     4S
          10 x 6                       37A                     3S
          10 x 7                       42A                     3S
          11 x 7                       50A                     3S
          12 x 6E                      48A                     3S

COMMENTS: Nomenclature is defined as follows:
            0MA means 0.S. airplane motor
            First two digits are the rotor diameter
            Second two digits are the length of the magnets
            Last digits indicate the kV of the motor

                                                                   jxs 05/11/11
                                                                         ir/jxs