Re: Re: wing spars witc C grain at front?

From: William Gowen <wdgowen_at_gmail.com>
Date: Sat, 7 May 2011 12:41:57 -0400

What's important to me is that if you have 2 sheets of wood that look good
for making the spars you need you can cut spars from both sheets and then
test them to see which works best for your purpose. This doesn't answer your
question about which grain pattern is best but it will answer the question
of which spar is best.

This is similar to what I was trying to say about multi-strand motors. I
think the number of strands of rubber is not as important as the performance
of the individual motor. A 3 or 4 strand motor may perform better or worse
than a 2 strand motor made from the same rubber. A C grain spar may perform
better or worse than an A grain spar even if they're from the same piece of
wood.

Testing will tell you which is best in either of those situations.

On Sat, May 7, 2011 at 12:31 PM, izgo <izgo_at_yahoo.com> wrote:

>
>
>
> William,
>
> Its not so easy because for a tapered wing spar I need to cut them from
> different wood sheets, Or use a think one so you can cut from both
> directions.
>
> Hard but not impossible, but i thought maybe all this was already tested
> and there is a simple reaon to prefer one orientation and not the other.
>
>
> --- William Gowen <wdgowen_at_...> wrote:
> >
> > The simple solution is to make spars both ways and do deflection tests
> > on them.
> >
>
>
>
Received on Sat May 07 2011 - 09:42:04 CEST