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-   -   Great Planes P-51 ARF 40 conversion (http://www.rcuniverse.com/forum/glow-electric-conversions-132/1813554-great-planes-p-51-arf-40-conversion.html)

mobert 05-14-2004 01:00 AM

Great Planes P-51 ARF 40 conversion
For some time now I have been considering an electric conversion of the Great Planes P-51D 40size ARF. I'd be interested to find out if anyone has done this. I have an AXI 4120/14 sitting there dying to be used in something.... I wonder if it would fit the bill for the GP P-51. Any thoughts anyone?

Greg Covey 05-14-2004 01:24 PM

RE: Great Planes P-51 ARF 40 conversion
The specs. for the Great Planes P-51 are similar to my Hobby Lobby Skylark using the AXI 4120/14 motor. The P-51 appears to weigh a bit more but that should be fine for a scale flying model.

Look at my thread on the [link=http://www.rcuniverse.com/forum/Hobby_Lobby_Skylark_e%2DConversion/m_1429819/tm.htm]Hobby Lobby Skylark[/link] and see if the mounting scheme may work for your P-51.

Matt Kirsch 05-14-2004 01:50 PM

RE: Great Planes P-51 ARF 40 conversion
The profile guys have the Profile Brotherhood. We need to form the AXi Brotherhood.

Don't know why I didn't point this out earlier, but I have an AXi 4120/14 in my .40-size Corsair ARF. On sixteen HR4/5FAUP NiMH cells with a 12x8 prop, it flies the plane quite well. You could go with a 5S LiPoly pack and the same prop, or a 4S LiPoly pack and a bigger prop to lose weight and gain flight time.

mobert 05-15-2004 01:05 AM

RE: Great Planes P-51 ARF 40 conversion
Greg and Matt, thanks to you both for the information. This is just the kind of encouragement I needed - I can happily go and relieve my wallet of some cash, in return for a GP P-51 arf. I've only just dabbled in Lipo's, so maybe I'll try the NiMH option first and see if I can make it go. I've recently burnt out a Kokam Lipo charger - it was charging a pack, reached 90% capacity, and then started to emit a high frequency noise, and then just turned black and flamed out in front of my eyes!! It happened so quickly that I couldn't even drop my jaw.
So I'm a bit Lipo shy right now, but will get back to them soon.

E-Challenged 05-18-2004 02:37 PM

RE: Great Planes P-51 ARF 40 conversion
I just ordered my first 16 cell Sanyo 1950AUP pack for my Dynaflite P40 and P51 Funscale projects. I'm using an Astro Cobalt brushed 25G and plan to buy an AXI 4120/18 using same pack or maybe a 14 or 16-cell GP3300 pack. I have .40 glow engines that would fly these very well but want to try e-power. From what I've been told, I can expect 6-7 minutes of scale aerobatics with the 1950 pack and somewhat longer at reduced throttle. Plan to use a 500 mil radio/servo pack,although some of the latest add-on BEC devices look good at least in the ads.
Not ready to spring for a Lipo charger and six large series/parallel Lipo packs yet, big packs are still too pricey for me.

Greg Covey 05-19-2004 08:28 AM

RE: Great Planes P-51 ARF 40 conversion
I like the 1950AUP cells also. In a 30amp application, they beat out CP1300 cells.

I have not used them in a 40amp application yet so I don't know how they compare to CP1700 NiCd cells other than being a bit lighter.

Matt Kirsch 05-19-2004 12:01 PM

RE: Great Planes P-51 ARF 40 conversion
I'm at 38 Amps on my set. Power's good, but duration is a bit lacking. I've got about 5 minutes from takeoff to landing, and that doesn't leave much for a go-around. The old Supernova puts in about 1450mAh after a flight.

If I remember Greg's Texan on CP1700s from last summer, he had about 3 minutes of duration. It's probably got the new Kokams in it now :)

Longarm 06-08-2004 03:11 PM

RE: Great Planes P-51 ARF 40 conversion
1 Attachment(s)
This was my H-9 60 size P-51 with an AXI 4130-16 motor.

Pictures of the finished plane, the crashed plane, and it coming on final approach of its second flight.

I had a servo bind on the retract servo and all other servos had no power. It spiralled in and was crashed in a terrible way.


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