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Old Apr 17, 2007, 08:39 PM
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Joined Nov 2006
5 Posts
DA 50-R on Great Planes 1/4 Extra 300S Wagstaff ARF 1.60-2.1,78"


I have just received my Great Planes 1/4 Extra 300S Wagstaff ARF 1.60-2.1,78". Now I have to define what engine I am gonna buy to power it. Per Great Planes spec its weight is 14-16 lb (6.35-7.26kg) and the recommended engine varies from 2.5-3.8 ci (41-65cc)(Gas).
I am to about to buy the DA 50-R. What are your feelings about it, since the end of recommended engine scale per great planes is 65cc.? Will it pull this airplane out of any hover? Per DA 50-R spec this engine is for a 14-18lb aircraft. I am afraid of not having enough power.

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Old Apr 17, 2007, 09:40 PM
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ncrego's Avatar
United States, NH, Nottingham
Joined Aug 2002
1,077 Posts
Great engine, but not the engine for that plane. It's really too small for it, the wing loading comes out too high and the performance suffers. It's a much better plane for a large glow engine, the 50cc gassers are just too large, and the 40cc are just a bit too small. A DA 50 in that plane is a rocket, but if it's pointed anywhere but straight up, it doesn't fly well.
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Old Apr 21, 2007, 01:16 AM
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cadconversions's Avatar
Scottsville, KY
Joined Jun 2002
5,641 Posts
I had a buddy that had a Brisson 50cc in his and it was great but they are heavy compared to the other models on the market. I think the DA-50 would be find with throttlle control (more power than you need) but allow you to move up to a larger plane later.
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Old Apr 22, 2007, 12:40 AM
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Pueblo, Colorado
Joined Jul 2005
604 Posts
I've had a ZDZ-40 on mine. Great flying plane at 13.5 lbs. Plenty of power at my altitude 6400ft. 20X10 PowerPoint prop at 7200RPM.

*note* Simitar prop in photo was a dog!
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Old Apr 22, 2007, 07:40 PM
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~SnApRoLl's Avatar
United States, MD, Piney Point
Joined Mar 2005
1,902 Posts
The DA would be a great engine for that plane. Just check the balance. It will pretty much have unlimited vertical. A fellow member at my club has the G.P. 78" Patty Extra with a DA50 and it is a sweet flying model. I have the AeroWorks QB Yak 50cc with a DA50 and it weighs about 17lbs and it flies absolutly perfect. It has powerful vertical performance and it's still breaking in and a little on the rich side. I would go with the DA.
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Old May 15, 2007, 08:56 AM
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Joined Sep 2004
11 Posts
50 is good

I have a patty extra with the da, it is not a snap happy beast or anything. It is good set up in my opinion. It is my first gas set up and I am doing well with it. Mine cam out at 16 lbs even with one battery on servos and one receiver, no fancy stuff.

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