Top Hinging Ailerons and Elevators

[Alan Simmonds]

I like this idea too, but only if you can get them pop out just in the
downlines ;-) 

Alan
 
 -----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of EHaury at aol.com
Sent: 07 April 2003 18:58
To: discussion at nsrca.org
Subject: Re: Top Hinging Ailerons and Elevators


Probably the biggest reason for top (or near top) hinging anything is
weight savings when using very large ailerons on relatively thick wings
as may be the case with AA 3D designs. 

If 45 degrees of travel is desired, and even if both the aileron and
wing are beveled, a quite thick balsa edge is needed to do it
conventionally. With top hinging the foam can be cut to the bevel and
sheeted with 1/16, having only some 1/4" insets for the hinges. Saves a
bunch of weight.

As for the gap, on my Widebody 60 with top hinging and very wide bevel
on the bottom (actual gaps sealed) there was no deleterious effect. I
did tape (front edge only) some 1/64 ply "covers" over the bevel opening
and saw no change in upright flight. Nearly crashed in inverted flight
as the covers stood up like spoilers in the now lower pressure area
(top). 

Earl 

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