Archived posting to the Leica Users Group, 2009/10/20

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Subject: [Leica] Fender Bender
From: Frank.Dernie at (Frank Dernie)
Date: Tue, 20 Oct 2009 08:59:14 +0100
References: <> <F74547E8FBC64AEB9D0EE2D2FC4066F4@jimnichols> <>

Hi Jerry,
I have been working with Carbon-Epoxy since 1982. It requires a  
different mind set to design with it than used for metals, for example  
any fibre reinforced structure is not really suitable for rivets,  
though non-expanding rivets which -can- be used are nowadays readily  
available. These are more for the benefit of traditional construction  
than suitableness-for-purpose though. How resilient a component is  
depends on design and material choice, as usual, it just needs a  
greater depth of knowledge to exploit than do metals. The Aeronautical  
industry is rightly very conservative...
I have used carbon epoxy springs which are very light.
Frank D.

On 19 Oct, 2009, at 21:56, Jerry Lehrer wrote:

> Jim and Rei,
> Carbon composite has about zero ductility.  Carbon -epoxy composite  
> is what the Boeing 787  is made of.
> I work with that stuff every day.  It doesn't bend-- IT BREAKS.
> Jerry
> Jim Nichols wrote:
>> My condolences.  I can't figure how that area could have been  
>> struck, leaving other surrounding areas unmarked.
>> Jim Nichols
>> Tullahoma, TN USA
>> ----- Original Message ----- From: "Rei Shinozuka" <shino at>
>> To: "Leica Users Group" <lug at>
>> Sent: Sunday, October 18, 2009 11:49 AM
>> Subject: [Leica] Fender Bender
>>> unfortunately, my fender
>>> DLUX4
> _______________________________________________
> Leica Users Group.
> See for more information

In reply to: Message from shino at (Rei Shinozuka) ([Leica] Fender Bender)
Message from jhnichols at (Jim Nichols) ([Leica] Fender Bender)
Message from glehrer at (Jerry Lehrer) ([Leica] Fender Bender)