The "definitive" discussion on flap setting is in the No. 7 Factory
Newsletter, March 1994 (excerpt attached here).
One (or two ) of the taildragger conversions (which use the tri gear
electrically driven means of flap activation) have flap settings up to
(I am told) 40 degrees.
It is reported that 30 to 35 degrees gives a useful increase in drag to
enable steeper approaches.
Collective aerodynamic wisdom suggests that about 30 degrees is the
general limit of any benefit for simple Fowler flaps.
Do any tri gear pilots have a view on the best flap setting for the
shortest possible take off distance? And the optimum setting to take off
AND clear a, say, 50' obstacle (i.e. best compromise for the safest
departure).
Duncan McF.
----- Original Message -----
From: Frank Mycroft
To: europa-list@matronics.com
Sent: Friday, June 12, 2009 5:44 PM
Subject: Europa-List: Flap extension
It is my recollection that in the early stages of development of the
Europa (when almost any degree of flap could have been designed in) it
was found that anything more than 25degrees increased drag but did not
increase lift. In other words more flap could give you a steeper
approach, but would not reduce the stalling speed.
Frank Mycroft
|