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Old Jun 17, 2011, 10:57 AM
malakiblunt is offline
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were to hinge flaps on Clark Y ?


Hi im in the process of drawing up a 6ft span cessna Birddog, im looking for extream stol performance, to that end im building it very light,
I had originaly intended to use a Drela aerofoil as i realy like the way my supergee handles, but i know enough about to know i cant just increase the chord 13" and double the wing loading expect it to handle the same.

Anyways so ive gone back to basics and decided on the Clark Y (unless anyone ccan recomend something better?) , Its going to be a hotwired wing so i can get the foil acurate, my qeustion is were should i hinge the flaps for best performance?

kind regards
philip
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Old Jun 17, 2011, 12:21 PM
HerkS is offline
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This data should put you in the ball park
Old Jun 18, 2011, 03:08 AM
kestrel2003 is offline
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what book is that table from


Hi, what book/Report is the table from? rgds mv
Old Jun 18, 2011, 03:47 AM
JetPlaneFlyer is online now
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That table is really good.. the only caveat i would add is that it's based on quite high Re (609,000). The performance of flaps at the much lower Re of a medium size model during take off and landing could be very significantly different..
Old Jun 18, 2011, 09:16 AM
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Quote:
Originally Posted by kestrel2003 View Post
Hi, what book/Report is the table from? rgds mv
Airplane Performance, Stability and Control
Courtland D. Perkins, & Robert E. Hage

Most of those referenced NACA reports are probably still available
http://ntrs.nasa.gov/search.jsp
Old Jun 18, 2011, 12:35 PM
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great, many thanks


thanks, many regards mv


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