OOPS!

[Gray E Fowler]

Its all about compression modulus, not strength. This is a common mistake.



Gray Fowler
Principal Chemical Engineer
Composites Engineering




"Dean Pappas" <d.pappas at kodeos.com>
Sent by: discussion-request at nsrca.org
03/17/2004 09:26 AM
Please respond to discussion

 
        To:     <discussion at nsrca.org>
        cc: 
        Subject:        RE: OOPS!


Hey Eric,
Some years back (my guess is that this happened in '93) Steve Stricker 
laid up the fuselage on one of his first Excalibur IIs extra light to save 
weight, and added no formers, in the tail. This was a simple glass layup: 
no laminates. The first snap with the plane, the tail-cone twisted and 
folded over. Steve let go of everything, and the plane "popped" back 
straight. The rudder cables and the elevator pushrod survived, and the 
plane landed with rips in the the two bottom "corners" of the fuse, just 
aft of the wing. Very little reenforcement solved the problem.
 
Dean
 
 
-----Original Message-----
From: Henderson,Eric [mailto:Eric.Henderson at gartner.com]
Sent: Wednesday, March 17, 2004 9:34 AM
To: discussion at nsrca.org
Subject: RE: OOPS!

BTW this is not  an IMAC-attack. It was just so interesting to see a stab 
and fin stay still while the rest rotated itself off.  I have always 
thought that the back-end took most of the stress. This showed how much.
 
Murphy's law certainly kicked in this time.
 
Regards,
 
Eric.
 
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Tony Quist
Sent: Wednesday, March 17, 2004 1:14 AM
To: discussion at nsrca.org
Subject: RE: OOPS!

That plane was Mike McConvilles  2000 TOC plane.  The new owner admitted 
after the crash that the plane broke loose in the trailer and sustained 
some damage. 
 
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On Behalf Of Lance Van Nostrand
Sent: Tuesday, March 16, 2004 9:12 PM
To: discussion at nsrca.org
Subject: Re: OOPS!
 
Eric,
Amazing video! Was that a FiberClassics rohacel laminate plane?  Why did 
it fail?
--Lance
 
----- Original Message ----- 
From: Henderson,Eric 
To: discussion at nsrca.org 
Sent: Tuesday, March 16, 2004 8:15 PM
Subject: OOPS!
 
 Click here: http://www.cox-internet.com/33bd4u/images/IMAC_crash.wmv 
 
  Why didn't everyone run....?

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