Need Help Sizing motor,esc,battery
08-30-2009, 08:57 PM
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Need Help Sizing motor,esc,battery
I have a Supertiger gull 1600. It is a 2 meter sailplane with a brushed Mabuchi 540 motor, 30 amp ESC, 6-cell 1400mah nicad battery. I am interested in going to brushless motor and LiPoly battery.
What do I need?
How do I size this?
This should not be rocket science... I just want to get the sailplane to height and lose severalounces of weight.
What do I need?
How do I size this?
This should not be rocket science... I just want to get the sailplane to height and lose severalounces of weight.
08-31-2009, 03:58 PM
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RE: Need Help Sizing motor,esc,battery
Use [link=http://flbeagle.rchomepage.com/software/webocalc_1.05/html/webocalc_imperial.html]WeboCalc[/link] to estimate your requirements. Just plug in your plane's vital statistics. Read the "Help" section for an excellent tutorial.
Just guessing, you will probably need a 2.5 - 3 oz. brushless outrunner that can comfortably sustain about 20 - 25 amps of current without running much beyond warm. It should be rated about 800 - 1000 rpm/volt (Kv) and spin a 9x5 to 11x5 prop. A 2200 mAh 3S (3-cell) lipo might be a good battery size. It would not be too heavy but would provide enough ballast to enable you to balance the plane. The performance improvement should be dramatic. Good luck with your new configuration!
Just guessing, you will probably need a 2.5 - 3 oz. brushless outrunner that can comfortably sustain about 20 - 25 amps of current without running much beyond warm. It should be rated about 800 - 1000 rpm/volt (Kv) and spin a 9x5 to 11x5 prop. A 2200 mAh 3S (3-cell) lipo might be a good battery size. It would not be too heavy but would provide enough ballast to enable you to balance the plane. The performance improvement should be dramatic. Good luck with your new configuration!
