Ed, I have been doing a lot of work to trailers for three different SC 20’s. Here is what I have learned;
Question 1. The chines on both outer panels run parallel, so the bunks will run parallel. The distance, and angle cut on top of bunks, will be determined by the width of the chines you decide to lock in. I use the second (middle) chine to butt up against the inside of the bunks, and then the top of bunks are cut full length to the angle of third (outermost) panel of the VDH. This measurement is 53”, and I believe the bevel angle of outer panel is 21 degrees on a table saw for bunk tops.
Question 2. The length from bunk ends to bow roller is 17’ 5”, maybe less three inches to allow for trimtabs. Should get you there.
Vezo, Part II
This pic may be more clear. I have a 2016 Owens and Sons custom trailer, but built for a Pioneer 197, with a wider bottom. But the beauty of this design is the width of the aluminum I-beams are determined by the hull sitting on it. Then the bunks mount full length of the I-beams distributing weight the entire distance of the bunks. In this case, I had to build blocks, not yet mounted or carpeted, to center the hull. These are now 53” apart and will “lock in” the hull from sliding in between the length of the bunks, thanks to the parallel chines (Strakes?) running the entire length of the hull. It’s a beautiful thing.
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