wyrnut
Flying officer
Posts: 6
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Post by wyrnut on Feb 14, 2009 20:28:49 GMT 1
hi every one ...brand spanken new to this , my wife got me a mini cub , i havent even made my 1st flight yet and im already thinkin more batteries...LOL it has lipo 7.4v 300mAh is there any problem using lipo 7.4v with 900mAh ... and what would be the upside n down side to this...I have seen people say they had to make more room for the larger batteries.. thanks for any help ....... now im off to fly with the battery they gave me ... then maby buy a roll of repair tape
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Post by duck9191 on Feb 14, 2009 21:09:10 GMT 1
the more mah the longer you can fly, only trade off is weight, the 900 is gonna weight more then the 300. if the cub mini-cub can carry that much more then go for it. i know hobbycity.com has some rhino 360mah that are pretty small. you would need to get the weight of the stock battery and go from there.
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Post by flydiver on Feb 14, 2009 21:17:25 GMT 1
Most small planes will fly better to a whole lot better with less weight (small battery). A way to find out is weigh your battery. Attach an equal amount or more of weight. Fly it again. See if that is acceptable.
Most sites will post battery weight so you can get an idea.
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wjcjr1
Flight lieutenant
Posts: 92
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Post by wjcjr1 on Feb 15, 2009 0:42:42 GMT 1
That method of attaching the projected increase of weight for carrying a battery, camera, parachutist, small fury animal is a great idea. I guess I would've just bought the larger battery, thrown it in check COG and went and the result is the result. I really like your idea, alleviates the consequences of wasting a bunch of cash buying something you can not use.
A addition to this method could be as you are testing the theorized additional weight add the weight slowly, an example being only add a 1/4 ounce nugget at a time. By adding the weight in increments the characteristics in flight change will be slow and not a devastating OH NO...Crash...Smoke.
Wayne
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Post by flydiver on Feb 15, 2009 1:25:47 GMT 1
I have a scratch built foamy (YAK) It's my 2nd foray into that arena and I deliberately went light on this one. I fly it on anything from a 2S 360 > 1020 and have put a 1800 on it. If flies with all but for the floaty and trick stuff the best batteries are the 360>500 range.
OTOH, when I was learning I tended to like my Slow stick better with a big battery in it. Huge wing didn't care much and it provided stability that I was not yet good at. The stock cub is not terribly weight sensitive. I suspect the mini would be more so. Things often do not scale well.
Not familiar with the battery bay in that one. A common shock to Cub fans getting larger batteries is finding significant unexpected work needs to be done. You can generally get battery dimensions along with weight and figure that out.
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Post by mrmugen on Feb 15, 2009 3:13:35 GMT 1
Well I flew that same plane when it was released and know for fact that it is already too heavy with the stock set up. WIng loading is way too much IMO. If your only after longer flight times then try maybe a 500-600mah instead of the 900. I built one from scratch for a fellow club member with a 300 outrunner and it is perfect. Much lighter than stock and it actually floats around instead of having to go fast to stay up. Good luck and let us know how it goes. That is a fun plane once it is trimmed.
Kevin
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