toe out
Posted: Fri Feb 17, 2012 10:55 pm
Hi
Below is a quote from Bruce Frank that sums up a recent discussion on
RAH about toe-in on taildraggers. It agrees with what was discussed with
Bill Tee at BobP's last rebel builder's meeting, and other sources.
Since there are some conflicting messages in the archive, I thought I'd
forward it here.
Only thing I'd add is that a lot of camber will change the toe a bit
between the 3 point and the tail up attitude. ie landing technique and
camber might explain some of the comments in the archives. IF you also
have a lot of postive camber for some reason, I believe zero toe
measured in the tail high attitude can still result in unwanted toe-in
with the tail down. (slack bungees would tend to result in negative
camber though ;) )
Ken
"With a tail wheel you want it "0". If you error make it to ever so
slight toe out. Ed Wischmeyer hinted as to why. If you foot work isn't
fast enough and the plane takes a swerve when the plane lifts the inside
wing and gear leg the weight dumps on the outside gear leg. If that gear
leg is toed inward the wheel steers to the inside of the turn further
lifting the wing leading to real trouble. If the wheel is toed out the
loading on that one wheel tends to cause it to steer away from the turn
forcing the wing back down and planting the other wheel on the pavement.
Toed in wheels have been found to cause many a squirrelly tail wheel
plane. When the condition was corrected the planes became docile on the
ground. One of the advantages of landing a tail wheel plane on grass is
that there is less traction for mis-aligned or mis-guided wheels to
create a significant excursion into the weeds."
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Below is a quote from Bruce Frank that sums up a recent discussion on
RAH about toe-in on taildraggers. It agrees with what was discussed with
Bill Tee at BobP's last rebel builder's meeting, and other sources.
Since there are some conflicting messages in the archive, I thought I'd
forward it here.
Only thing I'd add is that a lot of camber will change the toe a bit
between the 3 point and the tail up attitude. ie landing technique and
camber might explain some of the comments in the archives. IF you also
have a lot of postive camber for some reason, I believe zero toe
measured in the tail high attitude can still result in unwanted toe-in
with the tail down. (slack bungees would tend to result in negative
camber though ;) )
Ken
"With a tail wheel you want it "0". If you error make it to ever so
slight toe out. Ed Wischmeyer hinted as to why. If you foot work isn't
fast enough and the plane takes a swerve when the plane lifts the inside
wing and gear leg the weight dumps on the outside gear leg. If that gear
leg is toed inward the wheel steers to the inside of the turn further
lifting the wing leading to real trouble. If the wheel is toed out the
loading on that one wheel tends to cause it to steer away from the turn
forcing the wing back down and planting the other wheel on the pavement.
Toed in wheels have been found to cause many a squirrelly tail wheel
plane. When the condition was corrected the planes became docile on the
ground. One of the advantages of landing a tail wheel plane on grass is
that there is less traction for mis-aligned or mis-guided wheels to
create a significant excursion into the weeds."
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To unsubscribe from this list go to:
http://www.dcsol.com:81/public/code/html-subscribe.wcx
Archives located at http://rebel:builder@www.dcsol.com:81/default.htm
To contact the list admin, e-mail mike.davis@dcsol.com
*-------------------------------------------------------------------------*
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username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
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