Tip washout allows the tips to stall after the roots and keeps the ailerons
effective just a little longer too. You'll find washout in almost every
aircraft wing except things like purpose designed aerobatic aircraft.

Ian


"OscarCVox" wrote in message
...
High tech wheel pants and old fashion wing.

In fact the wing is much more high tech than the planks that have
historically
been strapped onto various Cessnas and Pipers
It is tapered and has washout in the tips such that they are not providing
lift
(and thus drag) at cruising speeds. You thus find that their cruising
speed is
higher for the same horsepower engines than most convential (for that read
spam
can american) aircraft.
They are also very robust and we have decided to refurbish our 3 x DR400
tugs
rather than buy new ones as they do the job so well.
The only downside to wood and fabric is that they do not take kindly to
being
kept outside in inclement weather.
Now if only we could fit a water cooled deisel and airbrakes we would have
the
ideal tug
Nigel