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Vertical Rolls

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Old 12-05-2007, 05:14 PM
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KGSS28
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Default Vertical Rolls

Hay Don : I have the following questions.

1) My plane is trimed for vertical lines hands off with some rudder to high throttle mix . It dose not pull to the belly or canopy at least not that I can tell. I can get about one and a half or two rolls before it wants to augar and get ugly. Why does this happen and how do I fix it ? oh yea I have done multiple test making shure to stay out of the elevator.

2) I have been reading several articles where you can set the CG without the wings on using the wing tube to hold the plane . What is this all about and should we be doing this . The last article was by Scott Covey in the K-Factor.

Thanks Kirk

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Old 12-08-2007, 04:27 AM
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Don Szczur
 
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Default RE: Vertical Rolls

I cover this in my upcoming video. There are four forces, one which is weather vaning, which I suspect you are feeling. Don't fret, as long as it augers into the wind consistently you are ok. I'll keep you posted on the video status. Shooting for a winter release. It should be good.

If its a perfectly calm day and the plane is consistently doing it (you have to pull up in to a vertical up line entering from right to left and then from left to right) if the thrust, rudder and elevator trim is correct, then what is left is aileron differential. As long as you have adequate thrust to weight ratio (where the plane is not slowing down significantly at the top of lines) the vertical CG should not influence vertical up lines significantly.

The best desription on differential I've seen on this subject is from Peter Goldsmith. I can't recall if it was a Model Aviation magazine article or in the Diamante instruction manual (which has an excellent trimming and flying section I might add).

Don



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Old 12-08-2007, 06:48 PM
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Default RE: Vertical Rolls

Thanks Don , Looking forward to the video. Put me first on the list.

Thanks Kirk
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