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Old Mar 07, 2013, 10:17 PM
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United States, TX, Haltom City
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I was thinking a bout a cap 232 do you think it might be a good choice. but the thing is that i only found plans that have about 5 feet of wingspan. I was thinking for a minimum of 6 feet because of the weight of the engine. Do you think it mght fly? What wingspan do yours have?
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Old Mar 07, 2013, 11:47 PM
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winston mo
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I'm flying this plane with a dle 30 but a buddy of mine is flying it wit a much smaller motor
I suggest fiberglassing the motor box but it's a really nice flyer
http://www.nitroplanes.com/90a288g-m...green-kit.html
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Old Mar 07, 2013, 11:51 PM
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winston mo
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here's a video of me flying her.
Now I'm just recovering from a stroke like disease and you can see how well I'm able to fly her even though I have limited use of my hands
Big greeen (4 min 45 sec)
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Old Mar 08, 2013, 07:18 AM
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United States, TX, Haltom City
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Is that a weed wacker engine?
Ooh what prop size do you use on that?
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Last edited by Nastagol; Mar 08, 2013 at 09:22 AM.
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Old Mar 09, 2013, 10:14 AM
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earl, how much wingspan would i need?
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Old Mar 09, 2013, 10:54 AM
Hutch
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United States, Mt, Bozeman
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1/4 Scale (30cc) 3d/airshow planes will probably have 74" wingspan or so. Sport planes might have a larger wingspan, and 1/4 scale cub has a longer span.
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Old Mar 09, 2013, 10:57 AM
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for a weedwacker engine? because i am about to build a 62 " i believe
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Old Mar 09, 2013, 11:03 AM
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Like what Hutinstuff stated is pretty much it. But it does depend on the plane design. For example a Hangar 9 Tiger Moth biplane has a 88 inch wingspan and uses a 20cc engine. A Hangar 9 PA-18 1/4 scale plane has a 114 inch wingspan and uses around a 26cc to 30cc engine. Then there is the Hangar 9 P-51 1.50 size Mustang plane with a 80 inch wingspan and for 26 to 30cc engines too. Thus the plane design and airfoil shape of the wing can affect what engine works for it.
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Old Mar 09, 2013, 11:23 AM
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yeah,, i took the plan and i increased the size so the wingspan is 72. all dimensions seems ok..
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Old Dec 26, 2013, 09:47 PM
Hutch
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Bringing this one alive again! Got the stihl 20 cc fired up today on the gas/ glow mix. It's spinning a 16x6 @ 6000 rpm with the stock muffler. Earl, have you noticed a performance gain with an aftermarket muffler? I think a hobbyking one fits on my stihl. I'm wondering if it's worth the $18 to get up to around 7000?
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Old Dec 26, 2013, 10:10 PM
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I think if you go with a tuned pipe or tuned muffler setup such as a canister type of muffler, you will see a improvement. But those dinky lawn mower style mufflers don't do anything really.

I think that something like this would do the trick, if you have the room for it. Also using one of the commemorative aluminum beer cans for a mousse can muffler would work too.
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Old Dec 26, 2013, 11:43 PM
Hutch
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Thanks earl. Put new rings on her, so I may stihl see an improvement. Going on a shingletown rose, so I'm not overly concerned with performance! I think I'll get some sort of muffler to redirect the exhaust. The local stihl guy also said a guy could shave the cylinder gasket to increase the compression. Not sure I want to go down that road yet....
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Old Dec 26, 2013, 11:58 PM
Hutch
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Earl, did you make velocity stacks for your carbs?
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Old Dec 29, 2013, 09:55 PM
Hutch
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Got her tuned up to 6600 rpm on the 16x 6. Muffler on the slow boat from china!
6600 rpm stihl 16x6 (0 min 11 sec)
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Old Dec 30, 2013, 12:04 AM
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Quote:
Originally Posted by hutchinstuff View Post
Earl, did you make velocity stacks for your carbs?
I don't consider them "velocity stacks" as they are too short, but I had in the past made them for some engines. Nowadays, there are several sources for them, so not much sense in making one. I think that the short intake stack helps the engine to run more smoothly with less roughness or erraticness happening from the fast airflow going past the carb's intake. Plus it helps keep down the spitting on some engines too, where fuel would get spit out when the engine is running.

That engine is sounding pretty good in your video there too.

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Last edited by earlwb; Dec 30, 2013 at 12:06 AM. Reason: add more info
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