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Sir Barf
Aug 07, 2009, 04:30 AM
Hi folks
I just bought a half finished Skybolt build by plans from Wendell Hostetler. Its a nice looking plane and I thought why not electrify this one? :D
I have got a second hand used Actro 60-200, my plan was to use the new Hyperion G3 cells and use two packs of 5S 5000 mAh and get a 10S battery. Or, I can use 24 A123 cells and get a 12S 4600 mAh pack. This package can be placed permanently in the plane, allowing me to recharge the batteries in the plane. Im not sure what would be best.
Is there anyone out there that has converted this plane into electric.
I guess that I can use a 24x10 prop spinning in the nose :)
Are

staggerwing
Aug 07, 2009, 08:08 AM
I have two of these bipes--neither elec, but just wanted to mention they were built (not by me) quite beefy & heavy per the plans & will req hefty motors & batts. I've read of the large Actro motors but not really familiar w/ them however if you can get a 24/10 up to 5500--6k RPM, it should fly the bipe fairly well pending RTF weight. One I have has a Q52 & provides power for some basic aerobatics for the 22 lb bird, & the other unflown, needs final finishing.

Sir Barf
Aug 08, 2009, 01:34 PM
They say that the Actro 60-200 with a 24x10 is comparable to a 60 ccm petrol engine :p . If this is correct, well I cant see why not this should not work. The petrol engine they used in the prototype weighed 2.95 kg (6,5 pounds), my problem seems to be to get weight forward to achieve correct CG. I have to construct a motorstand that also can serve as a batterytray. :confused:
Well, this is a vinter project and I hope to finnish this bird before next spring. Any suggestion and tips are most welcome.
are

Dennis C
Aug 09, 2009, 02:31 PM
at 24 lb you can get about 3100 Watts out of the 10s 5000 Mah packs that would give you about 130+ Watts per lb. Enough for good sport aerobatics

at that weight and pulling that many amps you may be looking at 5 minute flights or less

2 6s 5000 Mah packs with a smaller prop will give you more power or onger flight times

Not familiar with the spec's for your motor

You will need a 100+ amp ESC

The lipo set up will will be lighter and give higher power

It should be easy to cut the top of the cowll to provide easy acces over the motor mount for battery instalation,if there is not enough room on top of the motor mount, then you can mount them under the motor mount, a bit more difficult to get the battery's in and out

The Hyperion is a good battery and can be charged at 2c with the right equipment, so charging time for your flight pack in normal use will be under 20 minutes.

Good luck on the conversion

Dennis