3 ms·
Even if the motor is quiet you still have the propeller making a lot of noise. I (honestly) don't know if you can really get it quiet enough for the motor's noi
by euyyn 12y ago
Even if the motor is quiet you still have the propeller making a lot of noise. I (honestly) don't know if you can really get it quiet enough for the motor's noise to be important.
- davepage 12y ago> The propeller, even at 500 feet over the maintenance area, made only a light flutter, heard just as it approached. http://en.wikipedia.org/wiki/Lockheed_YO-3 http://en.wikipedia.org/wiki/Lockheed_YO-3 The largest source of propeller noise is transonic flow at the tips, so turning the propeller slowly helps significantly. The tradeoff is a larger propeller and more expensive engine installation due to the required gearbox.