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frankm(at)clara.net
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 Posted: Fri Jun 12, 2009 9:16 am Post subject: Flap extension |
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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
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ami(at)mcfadyean.freeserv
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| Posted: Sat Jun 13, 2009 3:43 am Post subject: Flap extension |
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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.
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| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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