[quote="mark.shimei(at)gmail.com"]Well,this probably isnt Kolb related ,since
it is an Ultrastar,but I will put this out anyway.
My ULTRASTAR has flown without the filler between between the center section
for 60hrs+ since April. I have not noticed any loss of control at stalls or
in any other flight position,including landing....plenty of room to flare.
I installed a velcroed gap filler with an alum. flashing leading edge to give
it stiffness,instead of using a center rib of sorts.
The takeoff-climbout seemed a little faster,but what really seemed to change
was the pitching up of the nose at cruise
Originally I needed to install a bungee to hold the stick back(John H trim) which
worked great. I now have to push FWD at level cruise(75%). Just trying
to figure out why it changed so much
On the flip side,I can putter at 3200 rpm and sink about 80fpm or so.Havent dead-sticked
it yet,but will try it as soon as the weather changes.Got 10+ in
so far,so I have a good reference point.
Mark
> [b]
Dude - last I heard, Ultrastars are Kolbs - no problem.
Shooting from the hip here, perhaps having the prop below the trailing edge of
the wing keeps the airflow from exiting the gap to the extent it would if the
prop is higher, thereby reducing the normal loss of lift. And the stick bungee
worked the way you would expect.
Now that you have a gap seal, the loss of air through the front part of the gap
(where the prop draw would not have as much effect) is reduced, giving you a
bit more lift at the forward part of the wing, changing your apparent center of
lift forward. Now you have to hold forward stick to compensate. In any event,
your center of lift has moved forward.
Not sure if this is right, but that is how I am visualizing it. And as Beauford
says, Worth what ya paid fer it.
Richard Pike
MKIII N420P (420ldPoops)
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