8C,10C,15C...which do I choose
02-17-2006, 09:51 AM
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8C,10C,15C...which do I choose
Okay getting a little confused here someone help me out...which is better higher C rating or higher mah rating?
I have a 3cell Li-PO/ 2000 mah / 10C battery turning a 12/6 prop on a E-Flite 480..on my amp meter it shows initial amps at 37 then starts to fall pretty fast and pack gets very warm after just a minute of running. Do I need higher amp rating or higher C rating or just smaller prop say a 11/7 ??
I have a 3cell Li-PO/ 2000 mah / 10C battery turning a 12/6 prop on a E-Flite 480..on my amp meter it shows initial amps at 37 then starts to fall pretty fast and pack gets very warm after just a minute of running. Do I need higher amp rating or higher C rating or just smaller prop say a 11/7 ??
02-17-2006, 06:22 PM
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RE: 8C,10C,15C...which do I choose
Tommy,
Think your pack is headed for an early death if you puch it this hard. As for me, I usually try to use my Lipos so that the max current they see is about 70-80% of the "claimed" C rating. For example, if a 2200 mAh pack is rated at 10C, its max continous current should be 20 amps or less. Therefore, I would pick a 2500 mAh or larger pack to fly the plane. Yes, it is a little bit heavier and perhaps a little more expensive, but it should make the pack last a lot longer in the long run. For your situation, I might look at a pack that is rated at 4000 mAh. I understand that www.maxamps.com has some pretty good packs in this range. An alternative would be to parallel two of the packs you are using, to get a 4000 mAh pack. That would work as well.
If you can use a smaller prop that will keep the max amps under 20 and still fly the plane well, that would be the cheapest and lightest solution.
Hope this helps.
D.W.
Think your pack is headed for an early death if you puch it this hard. As for me, I usually try to use my Lipos so that the max current they see is about 70-80% of the "claimed" C rating. For example, if a 2200 mAh pack is rated at 10C, its max continous current should be 20 amps or less. Therefore, I would pick a 2500 mAh or larger pack to fly the plane. Yes, it is a little bit heavier and perhaps a little more expensive, but it should make the pack last a lot longer in the long run. For your situation, I might look at a pack that is rated at 4000 mAh. I understand that www.maxamps.com has some pretty good packs in this range. An alternative would be to parallel two of the packs you are using, to get a 4000 mAh pack. That would work as well.
If you can use a smaller prop that will keep the max amps under 20 and still fly the plane well, that would be the cheapest and lightest solution.
Hope this helps.
D.W.
