Re: Re: Coslick style deflection testing

From: William Gowen <wdgowen_at_gmail.com>
Date: Sun, 21 Oct 2012 16:32:16 -0400

I don't know what weight I used. I just usually use a piece of solder
that I can hang on the end of the spar. If it breaks the spar it's too
heavy.

On 10/21/2012 4:18 PM, Mark F1diddler wrote:
>
>
>
> --- In Indoor_Construction_at_yahoogroups.com
> <mailto:Indoor_Construction%40yahoogroups.com>, William Gowen
> <wdgowen_at_...> wrote:
> >
> > IMHO what you really want to do is select the best spars from the wood
> > you have available. If you use this approach then the actual test
> method
> > isn't that important. Just set up the deflection tester so it will work
> > with the length of your spars, then hang a weight on the end of the
> spar
> > that will give you a readable amount of deflection.>>
>
> That's what I've been doing for years. But decided to try to match LC
> method/stats to see if I've been overbuilding in this area (with good
> wood I might rather use somewhere else.)
>
> <<A deflection of an average 1/2" will probably work. Then all you
> need to do is pick the ones with the least deflection.>>
>
> Are we talking about a .27 gram weight, and testing half spar at a
> time? I just did the above with a .026g/7.0" spar, weight hung at very
> end for only 4/16" deflection on Hobbyshopper gauge. This is typical
> result, so once again, wondering what I'm doing so different from
> published stats/results.
> MB
>
>
Received on Sun Oct 21 2012 - 13:32:26 CEST