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Old 07-21-2012, 05:53 PM   #1
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Looping problem

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I have a Funtana 40 and a Seagull Extra 300S with a61 2stroke in it.When I do normal size loops it preforms good but if I pull full up elevator to do a tight loop it is fine till it gets to the top of the loop it rolls right and then rolls right again at the bottom of the loop.This all happens with full power
If any one has any idea as to why this is happing with both planes I would be glad to hear from you Thanks Allan
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Old 07-21-2012, 05:57 PM   #2
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Re: Looping problem

just guessing but maybe too much elevator creating a high speed stall....program in a bit less elevator and I'll bet the problem goes away?....also, check what the elevator throws are as recommended buy the kit mfr ......Ron
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Old 07-21-2012, 06:15 PM   #3
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Re: Looping problem

If you are like me, I have a bad habit of pilling some aileron when doing a loop. If your transmitter has adjustable stick tension crank it up as far as it will go. You will also have to do a rudder and thrust check. Fly dead level straight away from you and pull straight up with power on, adjust rudder trim as necessary. When you got that adjusted, do the same maneouver but after about ten feet chop the power. If the aircraft dose not continue straight, adjust the thrust right or left to compensate. Then go back and do the rudder again. I usually build in 1/4" of right thrust and move the engine mount 1/4" to the left so the prop is in the center. Check for warped elevators. Make sure they are lined up and will not twist.

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Old 07-21-2012, 06:22 PM   #4
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Re: Looping problem

I have a Funtana 40 and it will do the same as yours with to much elevator throw in a loop. Nature of the beast. Go with less elevator and all will be fine.

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Old 07-21-2012, 07:12 PM   #5
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Re: Looping problem

Sounds like you have way to much time to fly and are getting a little cocky and aggresive. Spend some more time building planes for your son LOL!
The high speed stall sounds like that might be happening seeing as how the funtana has done that before.
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Old 07-21-2012, 07:25 PM   #6
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Re: Looping problem

Probably is snapping out of the loop as said above. One way to find out how much elev. you can get away with, is to make the big loop and continue doing consecutive loops gradually making them smaller and smaller. When you find the magic spot where it snaps out, say 3/4 back stick, land the plane and adjust your elevator throw so you don't go past that point with full back stick. Hope this helps.
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Old 07-21-2012, 08:55 PM   #7
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Re: Looping problem

OK Thanks everyone for your input. I will start with your sugestions tomorrow.and maybe, less agressive Allan
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Old 07-21-2012, 11:13 PM   #8
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Re: Looping problem

Did you check side to side balance of the plane? and check throw for each elevator half and compare?

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Last edited by moo; 07-21-2012 at 11:28 PM.
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