|Subject: [harryproa] Re: telescoping mast|
|From: "captian_rapscallion" <email@example.com>|
|Date: 12/30/2007, 5:17 PM|
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
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
> > I have several questions.
> Keep 'em coming!
> > Is the mast free standing?
> > 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.