<<B.t.w., maintaining pressure equalisation will probably be an issue with
foam filling as well, I'm thinking.>>
It is, and the build manual requires these internal spaces to be vented.
There was a case a few years ago where a Lancair 'popped' its tailplane in a
climb to high altitude, because of inadequate venting.
Duncan McF.
----- Original Message -----
From: "Jan de Jong" <jan.de.jong@xs4all.nl>
Sent: Friday, January 12, 2007 10:20 PM
Subject: Re: Europa-List: bouyancy
>
> I'm also intrigued because I'm finally getting close to putting the lids
> on my XS wings and now there may be just one more and very last thing to
> do.
> If and when I reach a positive decision that there is not that will be
> fine. I can do a little more filling and sanding of flaps and ailerons in
> the interim.
>
> In theory one could just close off the space forward of the XS wing spar.
> The only remaining task would then be to assure pressure equalisation for
> those times one wants to fly instead of float. I thought of:
> - Tubing from wing root to fuselage roof
> - Float valve at wing tip
> - Multiple, redundant, tubing to fuselage roof
> - Construct close-off as weakpoint (safety valve)
>
> Difficulty is knowing quality of any 1-off design.
> Safety lost could easily exceed safety gained?
>
> B.t.w., maintaining pressure equalisation will probably be an issue with
> foam filling as well, I'm thinking.
>
> Jan de Jong
> 461
>
>
>
|