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GP L39 - Is Stock Motor/Fan Adequate ?

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GP L39 - Is Stock Motor/Fan Adequate ?

Old 09-28-2009, 01:47 PM
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BalsaBob
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Default GP L39 - Is Stock Motor/Fan Adequate ?

About to assemble the Great Planes L39. Is the stock motor and fan adequate ? or is it best to upgrade them ? (it is so much easier installing the upgraded stuff with the initial assembly).

Thanks. Bob
Old 09-28-2009, 09:34 PM
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CBM Racing
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Default RE: GP L39 - Is Stock Motor/Fan Adequate ?

I wonder this as well. Anyone?
Old 09-29-2009, 01:21 PM
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frankf8293
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Default RE: GP L39 - Is Stock Motor/Fan Adequate ?

Hello: I use several of the Ammo motors. 3600, 4300, 5100 kv's. I place them into my scratch build edf's. The 3600 on 3s is ok. the L39 is using the 3500kv. It would be ok to start getting used to plane. But if you go 4s you will see a big change in speed. Just do not go WOT. Go 4300kv she will be nice and fast
Old 09-29-2009, 08:18 PM
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SoppyJoe
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Default RE: GP L39 - Is Stock Motor/Fan Adequate ?

A good friend at my field has one, bone stock, and it gets along just fine.

Joey
Old 10-01-2009, 10:36 PM
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Aerospacer
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Default RE: GP L39 - Is Stock Motor/Fan Adequate ?

Bob,

Most people who upgrade the stock setup go to something way north of 200 watts which satisfy those "hair-on-fire" flying urges but make for a more problem-prone setup. My solution was less aggressive but still gets a fair amount of improvement. The stock setup is designed to deliver about 130-140 watts. All I did was upgrade the motor to the Ammo 20-40-4040 which gives me another 30-40 watts. This extra power warrants using a 1500-1800 mah 3s LiPo which still doesn't add much to the AUW, so it still flies decently with throttle management instead of WOT.
Old 10-02-2009, 08:34 AM
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BalsaBob
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Default RE: GP L39 - Is Stock Motor/Fan Adequate ?

Thanks Aerospacer .... that is a good plan. Bob
Old 10-10-2009, 05:24 PM
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BalsaBob
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Default RE: GP L39 - Is Stock Motor/Fan Adequate ?

Hope to fly it tomorrow (weather permitting). I noticed no cooling or air circulation in the battery/ESC compartment ..... is this an issue ? Bob
Old 10-10-2009, 10:06 PM
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Default RE: GP L39 - Is Stock Motor/Fan Adequate ?

I have one on the way, should have it by next weekend to fly it, Im putting my XF fan in it with the little screamers jet screamer motor, running a donsRC pentium 30amp esc, electrifly 11.1 1500mah pack...not sure what it will do in the L-39 but I had that combo on a modified stryker and it worked great, not sure on the speed but plenty fast(I'll try to clock this one with my GPS) and the run time was the big plus, I was getting 8 minutes or more out of it and that was flying it pretty hard, I will also be trying a 4s eventually and Im building a thrust vectoring setup for it that will operate with elevator and rudder for some high alpha ability...I'll let you know what happens and start a thread on it, time to make this little thing what it can be...another thought, micro air retracts, I found some light enough if I have room for the bottle and stuff for them...I'll let you know how it does, may save you some cost in playing around with motors till you find one you like...

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