Subject: RE: [harryproa] Interesting kickstarter project |
From: "Jerry Barth" <shredderf16@sbcglobal.net> |
Date: 10/3/2013, 9:46 AM |
To: |
Reply-to: harryproa@yahoogroups.com.au |
Rob,
How would you join the tubes together?
I realize the bend would be messed up but just curious about how you would do
it and still have good structural properties.
Thanks,
Jerry Barth
From:
harryproa@yahoogroups.com.au [mailto:harryproa@yahoogroups.com.au] On Behalf Of Rob Denney
Sent: Thursday, October 03, 2013
5:12 AM
To: harryproa@yahoogroups.com.au
Subject: Re: [harryproa]
Interesting kickstarter project
Fantastic bit of kit. If it all worked, I'm pretty sure
you would get your money's worth over the build of the boat, excluding your
time. It is no problem structurally to join tubes, but the bend
characteristics of a mast would need some thought. And the weight would
increase. You also have to build the mandrels, which gets tricky for some
section shapes. There may also be issues removing larger items from the
mandrel, but nothing that a car, a tree and multipart purchase wouldn't fix.
Drawback of filament winding is that you can't taper the laminate or
easily add lengthwise fibres. The solution to both is the same. The
lengthwise fibres are added as sheet material, then overwrapped to consolidate
them.
The Forte braided system can't do this so tapers are tricky. But
for straight tubes, it is great, and those prices are excellent.
We get our masts etc from Etamax who have a 6m winder which, for some
jobs they dry wind, then infuse. It can also be used as a big
lathe to make the mandrels.
rob
On Wed, Oct 2, 2013 at 9:30 PM, Gardner Pomper <gardner@networknow.org>
wrote:
Hi,
I thought this http://www.kickstarter.com/projects/1157143472/x-winder-the-worlds-first-desktop-filament-winder was
something relevant to this group. It is a carbon fiber filament winder. The
largest model they are talking about is a 6" diameter and 8' long, but I
wondered if it might be possible to join the lengths together.
I was hoping that someone more knowledgeable than me (which would be
all of you! <grin>) might contribute their thoughts.
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