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Add a gearbox to your electric motor and you will be able to swing a much larger propeller more efficiently and gain an increase in torque. Originally this strategy was used for sports and cabin aircraft, where a large and less streamlined aircraft required continuous running of the motor during flight (lower current draw with a gearbox means longer motor runs). It was also used for larger electric gliders to obtain the efficiency to power a large and heavy aircraft.
Lately the strategy has been used with high performance motors, allowing a large diameter propeller which also has a large amount of pitch (remember, prop diameter gives you torque, prop pitch gives you speed). That way, vertical climbs at amazing speeds are possible. Following is a range of gearboxes for a range of purposes:
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- Peter Pine, PO Box 1050, Kingscliff NSW 2487
- Phone (02) 6674 0397 • Fax (02) 6674 2037
- E-mail: ppine@northnet.com.au
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