For general discussion of the Kolb family of aircraft.
Includes: Firefly, Firestar, Mark III C, Mark III X, Kolbra, Sport 600, Slingshot, Twinstar Mark II, and Ultrastar


Postby jsada » Sun May 06, 2007 10:57 am

On flying and old Twinstar I encountered aileron flutter at around 75 mph

Any advice on correcting it ?

I found some play in the control system, but not much
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Postby planecrazzzy » Sun May 13, 2007 7:59 am

     Flutter is a Very Bad thing to get .....Glad , it wasn't fatal....

Do you have "Counter Balance Rods" in your ailerons ???

The only time I've heard of a Kolb getting Flutter....Is when it DIDN'T have them...

I  re-adjusted mine this Winter....I didn't have flutter....

but the aileron would hang down when I was folding the wings....

You can see the new holes in the picture , about 2 inches longer "arm" now...

and what the Hell , I painted them up with checkers, Hey, it was winter...

I'll see if I can dig up a picture of mine...

Fly Safe...
                                Gotta Fly...
                                                 Mike & "Jaz" in MN                  
Aileron counter balance rods - checkered 004.jpg
These solid steel rods are the counter balance "weights"....helping to BALANCE the aileron
Aileron counter balance rods - checkered 004.jpg (59.92 KiB) Viewed 9515 times
Plane at Northern lights airpark 002.jpg
This isn't the greatest view of the counter balance on the ailerons....
but my planes at the hanger, this is the best I've got right now...
Plane at Northern lights airpark 002.jpg (92.89 KiB) Viewed 9515 times
Sometimes you just have to take the leap
and build your wings on the way down...
                Gotta Fly...
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Postby Sean_Caranna » Fri Aug 17, 2007 9:50 am

I agree with planecrazzzy, checkout the mass counterbalance of the ailerons and insure that they are identical in weight and balance of the control surface.  
Taking out any slop in the control rigging would also be a good idea but don't tighten things up so much that there is any chance of binding.
"I'll have what the gentleman on the floor is having."
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