It's also my impression that the goal is to demount, not telescope.
The trick is how the ends are attached.
I've been assuming that they fit into a socket in order to maximize
contact area and minimize stress points. And if the sockets are tight
enough to provide that contact area, I don't believe the splayed beams
will slide in.
If you had a series of large bolts on one end, and could slide the
beams up into place from underneath, that might work. It could be a
socket with the bottom edge open. But I'd still worry about
concentrating stress where bolts attach.
- Mike
jrwells2007 wrote:
I assume what Doug is getting at with splayed beams is to have beams that are demountable not telescopic. The primary concern is for trailering and not bothering about reducing beam for berthing. The attachment of the beams to the hulls would require some other system rather than a sleeve for at least one of the beam ends unless there is sufficient lateral flexibility of the beams to insert into a short sleeve probably at the ww hull end.
John
--- In harryproa@yahoogroups.com.au , Mike Crawford <jmichael@...> wrote:
>
> Doug,
>
> While I'm not sold on Robert's reverse sheer idea (I like the egg
> cross section -- to each his own), I do think he has a point here.
>
> To test his theory, I'd cut two short hulls from scrap foam (30 cm and
> 45 cm each) and make some beams out of dowels or pencils.
>
> For the first test, attach the beams parallel for one test, buried
> into the hull pieces by at least 2 cm, and see how they will slide into
> and out of the holds in the foam.
>
> For the second test, attach the beams at a 30 to 45 degree angle,
> again with 2 cm bury, and then see how smoothly you can get them to
> slide in and out of the holes when both "beams" are in. I realize you
> probably won't toe the beams out at 45 degrees, but the point is to test
> the theory.
>
> In the end, I think you'll find that: a) either the beams need to be
> parallel, or b) the ends of the beams need to be parallel, even if the
> main portion of the beam angles out.
>
> - Mike
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