A Wing Question

[Rcmaster199 at aol.com]

Bob, I haven't measured it but do have some knowledge about the subject. What 
you are asking is "what is the force exerted on or by the wing, spanwise, 
during the most violent maneuver". Consider that the wing panels weigh in at 
about 1lb each and may experience rotational acceleration (centripetal 
acceleration) of about 20 g's in a snap or very fast roll (it's actually alot less than 
that but trying to make a point). The force each panel needs to be retained by 
is around 20 pounds max

I use a 10 32 plastic bolt and nut to retain same. Break strength of the 10 
32 plastic bolt is approximately 125 pounds with a yield load of around 60 
pounds. The shear strength of the threads is high enough to retain the bolt during 
the tensile testing 
and wasn't actually measured (more than the bolt head's break strength; that 
broke first)
. Regardless, quite the overkill


Matt
> Subj:A Wing Question 
> Date:7/6/2004 6:55:53 PM Eastern Daylight Time
> From:
> Reply-to:discussion at nsrca.org
> To:discussion at nsrca.org
> Sent from the Internet 
> 
> 
> 
> Anyone out there actually calculated (or measured) how much OUTWARD force is 
> exerted on our wings during our typical stuff?  I'm looking for the force in 
> line with the wing tube, spanwise, for the "retaining" load to keep the 
> wings ATTACHED.....
>  
> Any knowledge?
> 
> Bob Pastorello
> rcaerobob at cox.net
> www.rcaerobats.net
> 

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