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The MICRO-4, 4-Watt motor has helped popularize ultra small electric powered free flight and continues to be a very popular system. It is a direct drive motor designed to run on two 50 mAh batteries and power 40-60 g. models having 50-70 sq. in. wing area. For slightly larger models, with 65-85 sq.in. of wing area, a 2-cell, 110 mAh battery pack more power for a longer time. Flight times of 2 -2.5 min. can be expected from a full charge.
The total system weight is 25-32 g. The MICRO-4 draws about 2 Amps at 2 Volts on the 3-1/2 x 3-1/2 prop and produces 15 g. of thrust. For propeller application the MICRO-4 is provided with an adapter using a #2-56 screw to retain the propeller. This makes the motor easier to enclose within the model while permitting use of other propeller types. Drill props to 0.89"diameter.
| MICRO-4 Prop Application Weights | |
| Motor w/adaptor | 11.6 g |
| 3-1/2" Prop | 1.1 g |
| 3-Blade prop w/spinner | 2.9 g |
| Switch, jack and plate | 3.3 g |
| 2 x 50 mAh battery | 7.5 g |
| 2 x 110 mAh battery | 14.3 g |
| 2 x 150 mAh battery | 17.9 g |
| 3 x 110 mAh battery | 21.5 g |
| 5 x 200 mAh battery (B-36) | 53.7 g |
| MICRO-4 Motor | M6-06 $ 19.95 each Canadian |
Includes: |
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| MICRO-4 Basic Package 1 | M6-07 $ 32.95 each Canadian |
For flying 50-75 sq. in. 40-60 g. models.
Includes: |
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| MICRO-4 Basic Package 2 | M6-07B $ 32.95 each Canadian |
For flying 65-85 sq. in. 50-65 g. models.
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