Your story reminds me of one of my own. When I built my first center spar, I failed to keep the two caps parallel to each other.? When I removed the clamps, I found that the spar had a slight twist to it.
I had to order new wood for the verticals, and then I flipped the caps over so that I would have new surfaces to glue the new verticals to.? If you look at my center spars, they now have slivers of wood missing on the top and bottom surfaces where the old verticals took the wood away when I had to break the original spar apart. Every event becomes a learning opportunity.? For me, I clamped the caps to the table after that to keep the caps parallel. Best Regards, Kerwyn On Tuesday, October 29, 2013 7:17 AM, Kerwyn Stoll <kerdogs at yahoo.com> wrote: The spar under flying load has the bottom cap in tension, and the top cap in compression.? The verticals keep those two caps spaced apart from each other.? The shear web keeps the two caps from moving in opposite directions (along the spar length).? Probably, when it hit the floor, one of the caps hit first, and was stopped by the floor, while the other continued to move.? So, if one vertical broke loose, the rest should have broken too! Kerwyn On Tuesday, October 29, 2013 3:50 AM, Pat and Robin Russo <patrusso at myfairpoint.net> wrote: Yes, the plywood is doing most of the work but it can not do the work as well if the joints are not clean and tightly done. End grain gluing has very little strength. The glue however does give a certain tightness to the joint and also provides a moisture protective coating. The tightness of your joints and good glue spread will minimize the possibility of the plywood flexing or twisting under loads. -----Original Message----- From: PPaulVsk at aol.com Sent: Monday, October 28, 2013 9:17 PM To: krnet at list.krnet.org Subject: KR> First of many oops. This morning I was working on my aft inner spar and I dropped it. I don't have the web skin on it yet. After inspecting it I notice half of my vertical members had broken glue joints. All the brakes had wood stuck? to the epoxy so I new they were good joints. But way did so? many brake?? Does the 3/32 plywood add most of the strength?? I know about load transfer. But really. Paul Visk Belleville Il 618-406-4705 _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options _______________________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options
