Gig 601Xl Builder wrote:
150flivver wrote:
On Apr 14, 8:36 pm, Brian Whatcott wrote:
wrote:
http://www.cnn.com/2009/US/04/14/nts...ane/index.html
Designed by Zenair.
Just saw it on CNN.
Karl
Ouch! Control flutter and reduced sick force per G at high g

Well, this is homebuilders heaven - so I suppose we could use a
reminder that balancing control surfaces, specially tail feathers,
can help stop the onset of flutter, that loose control wires
and rods can encourage.....

Brian W

How do you balance ailerons that aren't hinged?


Well they are hinged just that the hinge is an extension of the upper
skin of the aileron. Interesting point though. It seems that most if not
all of the accident aircraft did use a more traditional piano hinge?


Ah yes, a flex-hinge - a neat concept.
To balance a surface hinged with whatever, there are several choices.
1) (traditional) a leading horn outboard or inboard of the fixed
surface with a lead weight up front.
2) a lower aileron surface that comes further forward than the upper
surface, and that's leaded on its front seam. Like the Cessnas.
3) an aero and mass balanced extension - often seen on rudders:
a leading extension that balances the rudder mass, that reduces torque
along the rudder, and reduces pedal force. Some extensions are just for
aero effect.

Brian W