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rc:2s-quadcopter [23.09.2011 01:08]
vergo [Weight calculation] |
rc:2s-quadcopter [08.05.2012 21:31]
vergo |
| | ~~NOTOC~~ |
| | <note important>This plan has been discarded. It could be viable but would be too close in size with the 3S 8" prop quadcopter I already have. The micro quadcopter has replaced this one and could probably also use that mentioned 1300 mAh 2S battery.</note> |
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| ====== 2S Quadcopter ====== | ====== 2S Quadcopter ====== |
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| This is a planning page for a quadcopter using 2S batteries, more exactly 1300mAh. The reason is that I already have plenty of such for [[rc:ms-composit-swift-ii|MS Composit Swift II]] and wouldn't want to get yet another different size only for one device. Something ultrasmall or even mini isn't the target. More likely something using 8" props resulting in around 30-40 cm motor to motor distance. The target flight time is around 6 minutes. | This is a planning page for a quadcopter using 2S batteries, more exactly 1300 mAh. The reason is that I already have plenty of such for [[rc:ms-composit-swift-ii|MS Composit Swift II]] and wouldn't want to get yet another different size only for one device. Something ultrasmall or even mini isn't the target. More likely something using 8" props resulting in around 30-40 cm motor to motor distance. The target flight time is around 6 minutes. |
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| ===== Motor options ===== | ===== Motor options ===== |
| 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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