On Fri, Feb 27, 2015 at 6:33 AM, Gardner Pomper gardner@networknow.org [harryproa] <harryproa@yahoogroups.com.au> wrote:
I was browsing the harryproa web site, under masts, and I was reminded of the folding, unstayed wing masts. Did they ever get built? How did they work and what was the pricing
The stubs are built, the rest of it is ongoing. They are not cheap.
Along the same lines, I have always been under the impressing that wing masts cost way more than regular masts. I was thinking about it and was wondering if they could be constructed from the "normal" carbon fiber masts but adding a carved foam leading edge and a couple of flat panels on the trailing edge. The wing shape must not have to be that strong, since there are soft wing sails. The strength could be provided by the filament would round mast and the rest by relatively weak shaping. Oh, and I am talking about the partial wing, with a sail, not a full wing. Comments?
Wing masts do cost more, especiallty compared to filament wound tubes , although we now have wing section moulds so not so bad. Foam leading and trailing edges on a round mast work (I did it on one of the Elementarry masts), as long as the trailing edge has frames at the batten locations, other wise the track gets torn off. Weight goes up and the foam is prone to denting if it is handled a lot. Makes a very good cushion if the mast is dropped!
rob
- Gardner
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Posted by: Rob Denney <harryproa@gmail.com>
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