|Apr 16, 2012, 03:12 PM|
Planning on building another Northstar as I regret having to sell my old one with only ever getting a total of 11 flights on it before I was forced to sell it. This time I want to do it fully sheeted, glassed and painted with electric power.
I fly electric heli's but I need some help with figuring out the proper Motor/ESC/Combo i'll need. I want power equivalent to an OS .55
|Apr 16, 2012, 03:20 PM|
|Apr 17, 2012, 06:12 AM|
Sverige, Värmlands Län, Filipstad
Joined Jan 2009
Check how large diameter prop you can have to get prop clearance to the top of the wing.
Check with ecalc http://www.ecalc.ch/motorcalc_e.htm?ecalc
what temp, amp and watt (P(out) you get with various props.
Try APC Electric E prop. I checked briefly and with the motor, ESC (max 60 amp) and 6 cell 3700 25-35C LiPo I got with 16x8 prop 723 watt as P(out) and a mixed flight time about 8,7 minutes (minus 20% since You should not drain the battery more that you have 20% capacity left after flight, that mean about 7 minutes mixed flight time in your case).
723 watt is about 1 hp (746 watt = 1.0 hp).
Lets say the Northstar will weight about 7 lbs
That will be 723/7 =103 watt per lbs and should work OK for sport flying.
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