Re: ATM Plywood laminate

["at making" <atmaking@hotmail.com>]

Hi,

Yes Hugues, one of the first, if not the first who has tried thin plywood
and foam is Steven Overholt. When I was looking for is booklet "lightweight
Giant", I wrote to John Lightholer who send me is own booklet to me, Thanks
John !!
John has used this technic to make is beautiful 22" fd 6 dobson scope.
I have try this on a 22" too. Yes, it's more work cause each time their is
something to cut, their is 3 panel to cut, one plywood, one foam and again
one plywood, also their is more glue to spread but really, that really
worth
the effor ! The classical white wood glue or the yellow esterior grade is
good. I'm now currently making a 32" with a composite mirror box, "fork"
and
top cage. The mirror box is amazingly light, around 36 lbs, not lot more
than the 22's mirror box
..
I have used 9 mm plywood (baltic birch) and 2" thick foam for this new
scope
and for the cage, a 3 mm thick ordinary plywood with 2,3" of foam for the
top "ring". The top cage, in fact a single square shape, is light, around 5
lbs, despite is 40" size. I have started to translate all those pages but
it's not yet finished.

Frédéric Géa
http://www.astrosurf.com/altaz




>From: Hugues_Laroche@ses-astra.com
>Reply-To: Hugues_Laroche@ses-astra.com
>To: atm@shore.net
>Subject: Re: ATM Plywood laminate
>Date: Mon, 1 Oct 2001 08:36:13 +0200
>
>
>
>Oops
>
>I wrote:
> >Frederic is, I believe, working after ideas of John Lightholder (sp?)
>
>Should have read
> >Frederic is, I believe, working after ideas of Steve Overholt (sp?)
>
>But that's nearly the same, huh?   ;-)
>Had my birthday this week-end. Apparently the additional year was
>fatal to my memory.
>
>Hugues
>
>
>
>
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