There's no piece of wood below the top aluminum beam (which btw were I doing it again I would have made slightly longer so that it extends farther beyond the pins that hold it down for safety reasons). Right below the top beam is the deflated hose, then the rib, then a piece of soundboard scrap (for illustration) and then the radiussed caul. These are light but the aluminum is quite expensive--I was shocked when I placed the order. The dimensions are 1 3/4" x 3" and the wall thickness is 1/8". There is virtually no flexing. I made (I think) two 3', three 4', and one 5' lengths (I'd have to go out to the shop and look again). In retrospect I think I would have made another 5' length as you need something to span the width of the board on either side of the bass corner width without having to move one past the bass corner--or at least make the one long enough to do that. I tend to not show the cutoff from the top of the panel so you need a longer clamp to span that entire width. If you are cutting the panel along the cut off bar (easier for clamping when you install the board into the piano) then you don't need the same length for the clamps. Sorry about the drop in orders. But if I were ordering premades of course they would come from you. Fine work! David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Terry Farrell Sent: Friday, February 19, 2010 4:34 AM To: pianotech at ptg.org Subject: Re: [pianotech] Aluminum Pneumatic Soundboard Press Reposting Thanks for posting the pics David. They appear basically just like mine, but aluminum instead of steel and wood - very slick, neat and light! It appears you have a piece of wood atop the lower aluminum beam, but below the panel - what role does that have? What are the dimensions of the square tubing and the wall thickness? What is the longest open span and how much bending do you get when the air pressure is on? Those really look nice. 'Course, the down side is that now I see why I haven't gotten any orders from you for complete ribbed soundboards in a long time! :-( Terry Farrell On Feb 19, 2010, at 12:05 AM, David Love wrote: > Here's a reposting of the pictures. I think the original post was > from my > old computer, may it rest in peace. > > David Love > davidlovepianos at comcast.net > > <P1290049 (2).JPG><P1290050 (2).JPG><P1290051 (2).JPG><P1290052 > (2).JPG>
This PTG archive page provided courtesy of Moy Piano Service, LLC