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Author Topic: Conversion  (Read 2006 times)

Online john vlna

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Conversion
« on: April 07, 2017, 09:02:04 AM »
I haven't done much building lately but I have been converting glow planes to electric. Here is a sport carrier I have had for years, a Berliner Joyce OJ-2. As a bipe high speed is not real good, but it is easy to hang. As a glow it has flown with a variety of engines, most recently a FOX MkV plain bearing combat convert to throttle operation with a ST carb. The motor is a Turnigy D3548/6, 790 Kv. I'll be able to fly with either a 3 or 4 cell battery. The motor also comes in a 1100Kv version. (there used to be a 1400 but it is no longer offered). The motor is larger than needed, but when converting a glow plane balance sometime is a issue, and with this model I knew it would be. So I used a heavier mount and bigger motor to get some nose weight. It looks like the balance will be just about right. Since most of my flying is off grass these days(thanks FAAjavascript:void(0)) I'll add some bigger wheels. Even with the 4s battery I will be within the 3.5lb limit. I'll let you know how it flies. It should be fine, I recently converted a Henschel HS-123 which is about the same size and it flies very well. Although not for carrier I can hang it.

PS excuse the out of focus pictures, my camera no longer focuses properly

Offline JoeJust

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Re: Conversion
« Reply #1 on: April 07, 2017, 05:36:39 PM »

PS excuse the out of focus pictures, my camera no longer focuses properly
[/quote]

Neither does my brain. There is no excuse for impending senility.
Joe
I only enter contests so somebody else is not always in last place

Online john vlna

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Re: Conversion
« Reply #2 on: April 07, 2017, 07:08:07 PM »
Yeah that's my camera's problem, it is senile.

Online john vlna

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Re: Conversion
« Reply #3 on: April 09, 2017, 11:18:11 AM »
Go out to test fly this weekend, I took several different prop\battery combination, but needed only my first guess. It was so perfect I never did any other experimentation. I am using an APC 12x8EP and 3s 2700mah battery. I did not get any times but the model flies just like it did as a glow. Stable in high speed and easy to hang. The OJ-2 does not have a slider, I fly it like a 15, throttle and hook only. Weight is 2lb 12.8 oz. ready to fly.
OJ-2's were build in College Park Maryland, and it was tested as the Navy's first blind landing plane at CP airport. Used mostly as a float/cruiser plane, it was carrier capable.

Online john vlna

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Re: Conversion
« Reply #4 on: April 19, 2017, 08:57:57 PM »
Did a bit more testing yesterday, I would like a bit more power for hanging, and it would Also help high speed. Next time out I'll try a 4s battery, probably with a 10x8.


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