Joe Horton wrote:
>> For anyone using a belly board on their KR's I would like to know
what size they have, is it the right size (opinion) and a debate that I
remember from many years ago ...with holes in it or not to have holes .<<
Here's how I did mine on the KR2....full width of the flat bottom of the
fuselage, and 9.5" tall (nose draggers could probably stand more). The
creation and installation was really pretty quick. See
http://www.n56ml.com/n891jf/speedbrake/ for excruciating details.
My experience with this is that it noses the plane down, likely because
it's a drag point at the bottom of the plane, but it's never been
noticeable enough for me to readjust trim in any way....seems to not
affect trim much, for some reason. I'll have to pay more attention to
that next time I fly. Of course the huge bonus is that it's like riding
an elevator once you lower the board....a very noticeable rate of
descent, and quicker slowdown rate, which translates into a lot less
runway burned up in the process! You knew that already though.
As for holes, I looked into this a lot and the consensus is they made no
real difference, so I left them off.....because when retracted those
holes cause more drag, although the airflow is arguably quite turbulent
being aft of the prop anyway....
Mark Langford
[email protected]
http://www.n56ml.com
Huntsville, AL
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