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Old 11-20-2015, 06:27 PM   #11
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I am: Cliff S
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When you fly it use a larger diameter 4" pitch prop on the engine. This will give you good takeoff and climb and will limit the cruse speed to something reasonable!

"If my being here has made your day a little more pleasant then I have done my job" Red Skelton 1913 - 1997 (famous Comedian)
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Old 11-21-2015, 07:27 AM   #12
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I will weigh in on the smaller engine side. Maximum 4" pitch and all the diameter the engine will handle.

As was said in the second reply, learn to fly it "on the wing" instead of "on the throttle". I have personally seen far more beginners have bad experiences with over powered models than under powered. You wouldn't give your kid a Honda Civic with a 454 in it to learn to drive, there would be a wreak - guaranteed!

Yes you can always throttle back. Good theory. Never seen it happen. I don't! Do you?

Go with the recommended engine size and put your efforts into building it light. You will get far better return for you efforts by looking for ways to lighten it up than by overpowering it. It will take off quicker, fly better and land a way easier. Concentrate on the tail as an ounce back there will net you a 4 ounce gain on the nose. Sand, sand, sand!

Consider electric also, the E Flight .10 would give you all the power you need.

Lots of time to "super size" your engine after you have the basics down!

Hang time does not apply to ceiling fans, light fixtures, overhead door tracks or basketball nets!

Last edited by OLD PRAIRIE RED NECK; 11-21-2015 at 07:36 AM.
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Old 11-22-2015, 06:39 AM   #13
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Hi Paul,

My buddy Vic built a PT-20, 25yrs (!)ago. Used an OS.25FP. Flew great.
His first build, and he did a nice job.(the instuctions are good)
Cannot remember if there is a tank hatch on the plans, but there was one on his. It is 'robust' consruction, compared to other planes.
Vic got his Wings on it, then flew the crap out of it, having fun. Then moved on to other planes.
4/5 others flew it getting their Wings.
There were a few repairs along the way, nothing major.
The nosewheel eventually wore out after countless landings.
Got converted to taildragger.

I forget the name we called it. Vic would fuel it up, stick a paper towel in the middle of the landing area, and say 'Spot Landing' ! We would line up to have some fun flying it...

Hope this helps Paul.

There is a PT-40 for ~.40 engines. The PT-20 is for ~.20. Go for a .25.
I doubt a .15 would work.

Maac 6437
Unabashed Combat Team
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Old 11-22-2015, 05:32 PM   #14
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Thanks guys
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