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Sep 17, 2019, 03:51 PM
Aedificem ergo sum
cybermike's Avatar
Corvette is right. It's probably more like a 4A transistor, but stick to 2A max and you should be fine. I've used a variety of 6mm and 7mm motors (both DD and geared) under 2 amps with no issue. For 6mm - as stated previously, the J3 cub motor and Champ/Spacewalker/B-17/etc. gearbox (with the smaller spur gear) gives the best power, and can easily fly 12 - 15" wingspan models under 30 grams.

The stock Mini-vapor, B-17, and original Vapor motors are wimpy, and with the high-ratio Mini-Vapor gearbox, you are limited to swinging ridiculously large props very slowly, which is only good for very light, very slow planes.
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Sep 20, 2019, 12:11 PM
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This plane might be a source of ideas on how to do it, if you can get hold of some 1mm thick Depron or similar. It weighs 6.22g ready to fly, including a 50mAh battery that weighs 1.55g. No glue, no balsa. I don't know what the foam parts weigh, but I have some 1mm Depron that weighs about 140g per square metre, and a rough estimate shows that if I were to make this plane's foam parts of that, they would weigh about 1.5g.

If you wanted to do more than a simple stick model, you could build out of 1mm Depron but skeletonise the structure and cover it with supermarket fruit bags, which I have found weigh about 9g per square metre.


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