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-   -   brushless motor conversion (https://www.rcuniverse.com/forum/electric-training-102/708138-brushless-motor-conversion.html)

bdymond 04-20-2003 01:36 AM

brushless motor conversion
 
Does anyone out there know what I can use in place of a super 400 cobalt motor 27t in my wattage cap 232? I need the make of motor and controller, what size prop and battery pack type and cell count. I want to go brushless and have the power to hover if I can. Thanks for your help! :confused:

Billy Haynes 04-26-2003 04:48 AM

brushless
 
One suggestion would be to go to www.ezonemag.com click on disscussion (top left), then search (top right) type Wattage Cap 232, then search. There are many post on the zone of brushless caps.
I'll run some figures through motocalc for you, but for the best estimate I'll need the weight of the plane RTF minus motor, battery, s.c. & prop/spinner. I'll put in 14oz's as a start. Also what pack are you using? Does this plane need to fly fast to stay up? Motocalc (with what i've put in) is estimating a stall speed of 25mph, is this close or is it actually slower?
With some guessing of your weight & speed required.....Mega 16/15/5, 3:1, 12x8 prop, 10c KAN 950's=(Motocalc)=
With a wing loading of 17.8oz/sq.ft, a model of this size will have flying characteristics suited to an experienced pilot. The plane will fly fast, and be readily able to handle fairly strong winds.
The static thrust (33.1oz) to weight (27.2oz) ratio is 1.22:1, which will result in extremely short take-off runs, no difficulty taking off from grass surfaces (assuming sufficiently large wheels), and vertical climb-outs. This model will probably be able to perform a hover or torque roll.
At the best lift-to-drag ratio airspeed, the excess-thrust (13.2oz) to weight (27.2oz) ratio is 0.486:1, which will give steep climbs and excellent acceleration. This model should be able to do consecutive loops, and has sufficient in-flight thrust for almost any aerobatic maneuver.
Do you have a preference in brand of motor? Let me know if I can help somemore.


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