OMA-5020-490 .40 Brushless Electric Motor from O.S. Motors.
Features:
- For airplanes using .40 - .50 size 2-stroke engines or .70 size 4-stroke
engines
- 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
Specs:
- Rated Power: 1110W
- Rated Voltage: 18.5 - 22.2V
- Rated Current: 50 - 60A
- Maximum Current (10 sec): 90A
- No Load Current: 1.5A
- Phase Resistance: 23 miliohms
- Maximum Efficiency: 85%
- kV: 490
- Poles: 14
- Shaft Diameter: 0.20" (5mm)
- Shaft Length: 0.45" (11.5mm)
- Weight: 12.3oz (350g)
- Lead Wire Length: 4.3" (110mm)
- Length of Motor Can: 2.1" (52.5mm)
- Diameter of Motor Can: 1.98" (50mm)
- Length/rear of Motor Can to Prop Washer: 2.7" (69mm)
- Prop Washer Diameter: 0.87" (22mm)
- Thickness of Motor Mount: 0.16" (4mm)
- Width of Motor Mount: 2.67" (68mm)
- Height of Motor Mount: 2.67" (68mm)
Performance for this motor with different props and LiPo cells is as follows
(all data with 80A ESC):
Prop Size |
ESC |
Max Elec. Current |
LiPo Cells |
14 x 8 |
80A |
45A |
6S |
14 x 10 |
80A |
55A |
6S |
15 x 8E |
80A |
50A |
6S |
15 x 10E |
80A |
60A |
6S |
15 x 10E |
80A |
42A |
6S |
16 x 8E |
80A |
58A |
6S |
16 x 10E |
80A |
51A |
5S |
Includes:
.40 Brushless Electric Motor with Backplate, four Phillips Head
Mounting Screws, 4mm Gold Plated Male Plugs attached to leads,
three 4mm Female Plugs with Shrink Wrap, Prop Adapter and
Instruction Sheet