Re: wing spars witc C grain at front?

From: izgo <izgo_at_yahoo.com>
Date: Sat, 07 May 2011 16:05:00 -0000

Mark,

That is why I ask. I also think there is not much difference based on orientation "at least for square section spars".

But in wing spar usually we have a contsnt width (say 1mm) and a tapered front leading edge (say 2mm -> 1mm). so seems like all plans indicate A grain in front, leaving the c grain for the width.

Im just asking to know reasons for that, or it is in this way because its "used to be" in this way for long time.

Thanks for comments.

Ignacio.

--- In Indoor_Construction_at_yahoogroups.com, "Mark F1diddler" <f1diddler@...> wrote:
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>
>
> --- In Indoor_Construction_at_yahoogroups.com, "izgo" <izgo@> wrote:
> >
> >
> > Hello
> >
> > why all use A grain for wing spars (C grain up and down) and not in C grain in the front. In this way looks more trong, as the way it works in ribs.
> >
> > thanks.
> > Igancio
> >
>
> If you're talking breaking or buckling point, I don't think it makes a difference which way the A/C is oriented, at least with spar sizes. I'm happy just to have a stiff, straight grained piece of A/C to use. Others will differ, I'm sure.
> Mark F1diddler
>
Received on Sat May 07 2011 - 09:05:02 CEST