G'day,
You aren't the only one who hopes it works!
The mast is about 10% heavier, but considerably more than 10% (yet to
be discovered) more labour. It would not be possible in wood without
being much bigger and heavier. A secondary advantage is that very
large masts can be built by us and shipped around the world in a
container. The freight savings on this are enormous.
It should be the easiest way of getting a tall mast under a bridge.
On Dec 30, 2007 10:17 PM, captian_rapscallion
<captian_rapscallion
>
>
>
>
> Thanks Rob,
>
> Sounds really interesting. I hope it works.
>
> How much heavier does the mast have to be in order to gain this feature?
>
> Could the mast be constructed out of wood, carbon fiber without being
> too heavy?
>
> This might be overly optimistic, I was hoping for a telescoping mast
> in order to get under a bridge on a homebuilt
>
>
> --- In harryproa@yahoogrou
> >
> > On Dec 30, 2007 1:28 PM, captian_rapscallion
> > <captian_rapscallio
> >
> > > I have several questions.
> > Keep 'em coming!
> > >
> > > Is the mast free standing?
> > Yes
> > >
> > > Is the mast keel stepped?
> > Yes, with a UHMPWE plastic bearing on the keel and another on the deck.
> > >
> > > Is the section wing shaped?
> > Yes, a shortened Clark Y section, as per Tom Speer's logic.
> > >
> > > Is the mast metal or composite?
> > Carbon/epoxy infused in a female mould, each piece is built in 2
> > halves, the lower piece also has a sheer web.
> > >
> > > have you built a prototype?
> > No. The 15m one will be the first. I did not think the loads and
> > controls would scale up very accurately so did niot build a small one
> > first. As it is for me, it is a risk I am prepared to take.
> >
> > Regards,
> >
> > Rob
> > >
> > >
> >
>
>
>
>
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch format to Traditional
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe