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rc:2s-quadcopter [06.09.2011 00:22] vergo [Motor options] |
rc:2s-quadcopter [08.05.2012 21:31] (current) vergo |
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+ | ~~NOTOC~~ | ||
+ | <note important> | ||
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====== 2S Quadcopter ====== | ====== 2S Quadcopter ====== | ||
- | This is a planning page for a quadcopter using 2S batteries, more exactly | + | This is a planning page for a quadcopter using 2S batteries, more exactly |
===== Motor options ===== | ===== Motor options ===== | ||
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^ motor ^ weight (g) ^ size (mm) ^ rpm/v ^ current | ^ motor ^ weight (g) ^ size (mm) ^ rpm/v ^ current | ||
- | | E-Power GC GT2203 | 16 | 28x12? | + | | E-Power GC GT2203 | 16 | 28x12? |
| Turnigy 2204-14T | | Turnigy 2204-14T | ||
- | | Keda KD2203/41 | 19 | 27x20 | 1500 | max 8A | PH | 8x4.3 | 2S | | + | | Keda KD2203/41 | 19 | 27x20 | 1500 | max 8A | PH | 8x4.3 | 2S |
| C2404 | 21 | 30x10 | 1900 | 9.4A | PH | 9x5 | 2S | that prop suggestion sounds wrong... | | | C2404 | 21 | 30x10 | 1900 | 9.4A | PH | 9x5 | 2S | that prop suggestion sounds wrong... | | ||
+ | | E-Power GC GT2205 | 23 | | 1660 | max 8A (12A) | 3 mm | 8x4.3 | 2S (3S) | | ||
+ | | Blue Wonder 1300kv | 25 | | 1300 | max 8A | 3 mm | 8x3.8 | 3S | 2S quadcopter mentioned in Giantcod comments, 460g/7.5A hover | | ||
+ | | Blue Wonder 1500kv | 25? | | 1500 | max 7-9A | 3 mm | 8x3.8 | 3S | max current somewhat unclear | | ||
+ | Turnigy and Keda seem to be the best options so far. | ||
+ | |||
+ | Blue Wonder test data: http:// | ||
===== Weight calculation ===== | ===== Weight calculation ===== | ||
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^ item ^ weight (g) ^ note ^ | ^ item ^ weight (g) ^ note ^ | ||
- | | 4 x motor @ ~20 g | 80 | | + | | 4 x motor @ ~20 g | 80 |
- | | 4 x 15 cm square tube @ ~15 g | 60 | | + | | 4 x 1x1x15 |
- | | 4 x 8" prop @ ~10 g | | + | | 4 x 8" prop @ 5 g | |
- | | 4 x ESC @ 7-12 g | | + | | 4 x ESC @ 10 g | |
| MiniWii | 8 | availability unknown, alternatives much heavier | | | MiniWii | 8 | availability unknown, alternatives much heavier | | ||
- | | FASST receiver | + | | FrSky TFR4 |
| Turnigy 1300mAh 2S | 90 | | | Turnigy 1300mAh 2S | 90 | | ||
- | | baseplate | + | | Baseplates |
- | | wires and screws | 20 | just a guess | | + | | Wires and screws | 20 | just a guess | |
^ ^^^ | ^ ^^^ | ||
- | | = | | + | | = | |
+ | 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? | ||
+ | |||
+ | [[http:// | ||
===== Flight time guestimation ===== | ===== Flight time guestimation ===== | ||
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| 7.0oz (200g) | 3.40A/7.6v | | | 7.0oz (200g) | 3.40A/7.6v | | ||
| 9.0oz (250g) | 4.70A/7.3v | | | 9.0oz (250g) | 4.70A/7.3v | | ||
+ | |||
+ | This video seems to suggest that the table above might not be totally correct: http:// | ||
+ | However, another video gives similar result as in that table: http:// | ||
With the planned weight, the quadcopter should be able to hover with about 100 g thrust from each motor (4 x 100 g = 400 g). As a result, we should be able to assume 4 x 1.5A = 6A as total current required for hovering. | With the planned weight, the quadcopter should be able to hover with about 100 g thrust from each motor (4 x 100 g = 400 g). As a result, we should be able to assume 4 x 1.5A = 6A as total current required for hovering. | ||
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| 0.8A | 0.8A / (6A / 60min.) | | 0.8A | 0.8A / (6A / 60min.) | ||
- | If the battery isn't totally drained (like is shouldn' | + | If the battery isn't totally drained (like it shouldn' |
+ | |||
+ | The GAUI 330X is reported to have a flight time of about 12 minutes with a 2200 mAh 2S battery and a weight of around 500 g. |