Original Posted By: rhartwig11(at)juno.com
Subject: Re: Pietenpol-List: Pietenpol Video DocumentryIn a message dated 3/13/2005 10:53:12 AM Central Standard Time, wacopitts(at)yahoo.com writes:One error I found was at the lower cross-member at thefirewall. How do you attach it? At the intendedattach points, there are the metal fittings for theengine mount (Model A) which would hinder theattchment.Doc, The cross-member (3/4 X 3/4 Spruce) is shown on Drawing No. 1, in the lower right portion. It goes between the inbd side of each of the lower longerons, but is cut short, to access the inboard bolts of the engine mount fitting.The 1/8" plywood firewall is also the gusset for this cross-member, as well as the 7/32" plywood bottom, and will carry the load. There is also a gusset on the inbd side of each lower longeron, with a cut out for this lower cross-member, called out on Drawing No. 4 - in the upper left portion of the drawing.I think this might be the error. There should NOT be a cut out for the cross-member, because the cross-member doesn't extend all the way to the longerons. Gussets like this one, and others like it on the lower longerons, should have a filler piece installed, to prevent dirt or water from collecting betweenthe inboard gussets, and plywood sides, on each side of the lower longerons. On Drawing 6 - lower left portion - shows the lower Model A engine mount. This is a good point to clerify on the plans. The plans note - LOWER INSIDE FITTING INSERTED THRU FRONT BULKHEAD. CUT OFF END OF CROSS STRUT. This would be required to install one of the nuts on the inside of the fitting.Good point, Doc !! Lets hear more like this.Chuck G.________________________________________________________________________________Date: Sun, 13 Mar 2005 17:00:28 -0600Subject: Pietenpol-List: Sanding
Pietenpol-List: Sanding
Re: Pietenpol-List: Sanding
Original Posted By: Mark Blackwell
Subject: Re: Pietenpol-List: SandingI think I understand the sanding the plywood... I've made several ribs and ona few occasions, had some extra glue. So I made test pieces. As you mentioned,I made one with the braces at 90 deg. cuts and the other were tight joints.The one without any end grain contact (gussets only) actually broke free ofthe gussets quite easily. I have not tried it with sanding the plywood. All of the ribs I've made do not have plywood that is sanded. Should I scrap them(8 ribs)? The other test I did had tight fitting joints and the wood brokefirst on that one. Then tonight I put a lot of pressure just outside the gussetsand the brace came free of the top capstrip. IT had wood fibres in it butit broke at the glue line...Tom B.________________________________________________________________________________Date: Sun, 13 Mar 2005 22:09:51 -0500
Subject: Re: Pietenpol-List: SandingI think I understand the sanding the plywood... I've made several ribs and ona few occasions, had some extra glue. So I made test pieces. As you mentioned,I made one with the braces at 90 deg. cuts and the other were tight joints.The one without any end grain contact (gussets only) actually broke free ofthe gussets quite easily. I have not tried it with sanding the plywood. All of the ribs I've made do not have plywood that is sanded. Should I scrap them(8 ribs)? The other test I did had tight fitting joints and the wood brokefirst on that one. Then tonight I put a lot of pressure just outside the gussetsand the brace came free of the top capstrip. IT had wood fibres in it butit broke at the glue line...Tom B.________________________________________________________________________________Date: Sun, 13 Mar 2005 22:09:51 -0500