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rc:2s-quadcopter [23.09.2011 01:08] vergo [Weight calculation] |
rc:2s-quadcopter [23.09.2011 01:12] vergo [Weight calculation] |
Since I'm not going to change the battery, the most obvious places to save weight would be the baseplates (maybe too sturdy for a light weight quad), the aluminium arms (shorter with 3-blade props?) and the motors (are there suitable alternatives?). It would be nice to have the weight closer to 300 grams. Smaller props might result in smaller current needed during hover with the cost of climb speed but a benefit of longer flight times. | Since I'm not going to change the battery, the most obvious places to save weight would be the baseplates (maybe too sturdy for a light weight quad), the aluminium arms (shorter with 3-blade props?) and the motors (are there suitable alternatives?). It would be nice to have the weight closer to 300 grams. Smaller props might result in smaller current needed during hover with the cost of climb speed but a benefit of longer flight times. |
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[[http://www.ecalc.ch/xcoptercalc_e.htm?ecalc|xcopterCalc]] suggests that using a 7x4 props would provide better efficiency instead of using 8x4 props. The hover time would still be about the same. The motor to motor distance could also be smaller with 7" props resulting in less weight from the motor arms and a more portable size. | [[http://www.ecalc.ch/xcoptercalc_e.htm?ecalc|xcopterCalc]] suggests that using a 7x4 props would provide better efficiency instead of using 8x4 props. The hover time would still be about the same. However, the hover throttle jumps 45% to 62%. The motor to motor distance could also be smaller with 7" props resulting in less weight from the motor arms and a more portable size. |
===== Flight time guestimation ===== | ===== Flight time guestimation ===== |
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