wnorth(at)sdccd.edu
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 Posted: Tue Jun 29, 2010 8:05 am Post subject: tires and flaps |
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Hey Reuven,
If you don't take off with the tires flat you will be less likely to land
with them that way...
;{)
Michelin leak stop tubes are junk. I've had one fail, one not leak in the
tire even though it had a split when I took it apart, and I've helped
several folks get rid of them by the side of the runway when theirs split a
seam at fly-ins.
Mostly I use flaps on take off when I'm practicing using flaps on take
off... it does bring the tail up quicker, however one blows through flap
speeds so quickly it is just one more thing to remember or forget.
One place it is really useful is when taking off in formation with a slower
plane. My first time at that was with a Lockheed L60 (think C206 mated with
a Sherman tank) at KOSH. We had a plan, however I hadn't completely thought
through what it meant to me in terms of throttle and speed. It was not an
issue, I just wasn't mentally ready for everything to happen so slow while
taking off at 1/3 throttle. Since then I've learned that some flaps do
reduce the tendency to catch up too fast but one really has to 'work' at
going slow enough to let the lead get airborne first.
Practicing a low to medium power take off has some value because most of us
have been taught to go full power in a go around. This is not needed and can
exacerbate things due to the pitching up moment that occurs in our short
airplanes when the throttle is slammed full at really slow speeds.
Lastly, grass runways get 10 deg of flaps mostly due to the fact that the 5"
tires are really small and tend to be draggy on soft or long grass. Anything
that can add lift will reduce tire into sod penetration. My guess is Van's
grass strip in soggy Portland has conditioned him into always using flaps.
Wheeler
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