KBBS Archive 50,000

Re: Sam, what is your opinion?

Posted By: Sam McFadden
Date: Thursday, 26 July 2001, at 3:07 p.m.

In Response To: Re: Sam, what is your opinion? (Tony)

Tony,

No. I would be much more careful with the ideas you are presenting here. If your experiment reference is to the bend test results (available on the Guillemot site), then there was no indication that glass and epoxy lowered the strength of the samples. Someone else proposed that first fiber failure of a glass layer could lead to a concentration of stress and, hence, lower the strength of something like a paddle shaft. That concept can be defended analytically, but the bend test results did not demonstrate it. Some of the recent data I have suggests that hand-laid plain weave glass results in a stiffness and failure strain pretty close to that of wood (cedar), so I really don't think it would be a problem here.

In this particular case,the desire is to keep an existing paddle but make it stronger. Chip could either add wood to the shaft, or glass and epoxy. I would suggest wrapping the shaft with unidirectional tape at a small +- angle to the shaft axis, or using braided glass sleeve. If the sleeve is sufficiently over size, the fibers will be at a small angle when the sleeve is stretched out to contact the surface. Pete's suggestion of using CEPS is certainly worth the effort.

Sam

Messages In This Thread

Paddle Rehab *Pic*
Chip Sandresky -- Wednesday, 25 July 2001, at 7:22 p.m.

Sand aggressively
Paul G. Jacobson -- Thursday, 26 July 2001, at 2:43 a.m.

Penetrating epoxy *Pic*
Pete Rudie -- Thursday, 26 July 2001, at 1:03 p.m.

posting proceedure?
Elliott -- Thursday, 26 July 2001, at 1:43 p.m.

Re: posting proceedure?
Pete Rudie -- Thursday, 26 July 2001, at 2:19 p.m.

Re: posting proceedure? *Pic*
Elliott -- Friday, 27 July 2001, at 8:12 a.m.

BEAUTIFUL!!! *NM*
John Monfoe -- Saturday, 28 July 2001, at 4:58 a.m.

Re: The Celtic knot....
Shawn Baker -- Thursday, 26 July 2001, at 5:43 p.m.

Re: The Celtic knot....
Pete Rudie -- Thursday, 26 July 2001, at 6:36 p.m.

oof
Nick Schade - Guillemot Kayaks -- Friday, 27 July 2001, at 9:10 a.m.

Re: Sam, what is your opinion?
Tony -- Thursday, 26 July 2001, at 1:36 p.m.

Dynel?
Pete Rudie -- Thursday, 26 July 2001, at 2:40 p.m.

Re: Dynel?
Sam McFadden -- Thursday, 26 July 2001, at 3:25 p.m.

Re: Sam, what is your opinion?
Sam McFadden -- Thursday, 26 July 2001, at 3:07 p.m.

why d'ya think that is, Sam?
Les Nightingill -- Thursday, 26 July 2001, at 4:41 p.m.

explanation
Sam McFadden -- Thursday, 26 July 2001, at 7:06 p.m.

That helps a lot, thanks Sam *NM*
Les Nightingill -- Thursday, 26 July 2001, at 9:45 p.m.

Re: Sam, what is your opinion?
JimC -- Thursday, 26 July 2001, at 5:15 p.m.

Re: I'll just have to make another
Chip Sandresky -- Thursday, 26 July 2001, at 7:34 p.m.

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