Netters When I was building the boat for my KR-2S, I first fabricated the side truss sections as detailed in the plans, although mine are longer since I used all 14' of the longeron material rather than cutting them to 12'-2" per plan. When it came to installing the mahogany ply, I first set up a series of temporary vertical 1/2" bulkheads centered along a centerline on the work table. They were the width that the fuselage would be at that specific point. They were positioned to meet the trusses at station points along the trusses. I then prepared the skins, scarfing the joints as needed, marked the truss outline on the ply skins, applied the epoxy and stapled them in place as detailed in the instructions. I then clamped the truss / ply skin assemblies to the temporary bulkheads while the epoxy was still wet and allowed to cure. They were easily pulled into position using Pony pipe clamps along the curve edge of the truss and blocks and wedges along the straight edge (top of the truss) which is down against the flat surface of the work table. When done, they had the curve already in them. By doing it this way, you don't have the stress of the 5/8" longeron fighting the skin when you try to shape the fuselage. I must also point out that I built my fuselage with vertical sides, but I'm pretty sure you could use this method when building the "banana" style fuselage as well. Pete Klapp, building KR-2S N729PK, Canton, OH If you have any questions, contact me off list at pke...@hotmail.com
> Subject: Re: KR> Progress Report & Another Cracked Longeron Story > From: gun...@online.no > Date: Tue, 19 Jul 2011 10:57:47 +0200 > To: kr...@mylist.net > > Sorry, but I don't have a good solution for replacing the longerons, but I > can show you why you have the cracks in the place you have them. > > >
