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GP Corsair .40 Elec. conversion

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Old 04-22-2011, 06:43 AM
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boz44
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Default GP Corsair .40 Elec. conversion



I just began building a GP Corsair .40. I just retired and am returning to modeling after many years. This kit has been in my closet for more than 10 yrs. but is complete and pristine.
I need, and would appreciate, any help, tips, suggestions or cautions that may apply. I have built and flown 7 or 8 fuel birds and consider my skills in the intermediate to advanced range.
This is my first elec. conversion and I need all the help I can find.
Specific Questions:

Elec. motor and mount comparable to at least a .46 fuel engine?
Lipo Battery,charger, servos and speed control recommendations?
Transmitter Brand and Model?
Construction tips?

Thank you all in advance for any tips or help you may offer,

boz44







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Old 04-22-2011, 11:10 AM
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Default RE: GP Corsair .40 Elec. conversion

I can tell you what I used to convert a .46 sized plane to "E" power.

I used the following parts to power my Giles 202.

[link=http://www.hobbypartz.com/monsterpower-46670kvoutrunner-brushless-motor.html]Monster Power 46[/link]

[link=http://www.hobbypartz.com/volcano-series-60a-brushless-esc.html]ESC[/link]

[link=http://www.hobbypartz.com/83p-5000mah-5s1p-185-25c.html]Battery[/link]

[link=http://www.hobbypartz.com/60p-dyc-1004.html]Charger[/link]

I am using an APC 13X6.5 "E" prop, this gives me about 133 ounces of thrust at 54 amps. Give a flight time of about 10 minutes.

Here is a free online calc program I used to figure it out. It may take you some time to figure out what it all means, but that is part of the fun. You will have to build a mount for the motor. it can be a simple wood box you build onto the fire wall.

Buzz.
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Old 04-22-2011, 11:51 AM
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Default RE: GP Corsair .40 Elec. conversion

Thanks for the tips Buzz. I will be posting my progress as the adventure continues.
Boz
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Old 05-16-2011, 05:04 PM
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Default RE: GP Corsair .40 Elec. conversion

Boz:

I've done a couple E conversions recently, and also a lot of figgerin.

If you build that Corsair light, I mean cut some holes in things and sand some sheeting thinner (or use thinner sheeting), combined with an average 8 oz weight savings (over glow power) that you can get by using the right size motor/pack combo, I'm sure you can get that puppy right down to 5 pounds RTF.

The ideal power combo I've used for a 4.5 to 5 pound warbird is the GP Rimfire 25, a Flightpower 60 ESC, and a 4 cell 3300 pack from hobbyking.com ($35). With a 10x5 MAS 3 blade prop, you get over 5 pounds of thrust, 60 mph or better, and current flow that's under the maximum continous for the motor at wide open. At something less than 1/2, you'll get 15 minutes or more flight time. Use Futaba S3115 micro servos- they supply 41 oz of torque and are half the weight of a standard.

Enjoy.
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Old 05-17-2011, 05:58 AM
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Default RE: GP Corsair .40 Elec. conversion

Thanks Bob,
I appreciate the tips. I'm using a Hobby People 4120/05 motor, a Phoenix Icelite 75 Esc., a 4 cell 14.8 v 5000mah lipo. and a 30x15 3 blade prop.
I'm just finishing the fuse on this bird so it will be a while before I post any flight results.
Thanks again,
Boz
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