dwardio
Member
Great question! Yes, you'll be fine as long as you keep a couple of things in mind.
1) Higher max amperage = heavier. Probably not an issue for most folks, but if weight margins are tight, this can be a factor.
2) Be absolutely sure that your ESC matches the number of cells in your battery! If you are using a 2S lipo, don't match it with an ESC designed for 3-4S. If your ESC is rated for 2-3S and you attach a 4S battery, you will fry the ESC (and possibly the plane, workshop, yourself, etc.)!
That being said, the usual guideline is to use an ESC sized about 30% larger than the calculated max amps. 18A * 1.3 =23.4A, so rounding up would suggest a 30A is plenty.
You may know this already, but be sure to mount your ESC so that it has as much airflow past it as possible. This will help keep it cooler, making it last longer. Also, one side will be totally flat and the other "bumpy" under the shrink-wrap. Put the glue/tape on the bumpy side, as the flat side is the heat sink and needs to have air moving past it.
1) Higher max amperage = heavier. Probably not an issue for most folks, but if weight margins are tight, this can be a factor.
2) Be absolutely sure that your ESC matches the number of cells in your battery! If you are using a 2S lipo, don't match it with an ESC designed for 3-4S. If your ESC is rated for 2-3S and you attach a 4S battery, you will fry the ESC (and possibly the plane, workshop, yourself, etc.)!
That being said, the usual guideline is to use an ESC sized about 30% larger than the calculated max amps. 18A * 1.3 =23.4A, so rounding up would suggest a 30A is plenty.
You may know this already, but be sure to mount your ESC so that it has as much airflow past it as possible. This will help keep it cooler, making it last longer. Also, one side will be totally flat and the other "bumpy" under the shrink-wrap. Put the glue/tape on the bumpy side, as the flat side is the heat sink and needs to have air moving past it.
rcspaceflight
creator of virtual planes
Some of the higher amp ESCs do not have a built in BEC. Otherwise it should be fine.
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