Started contemplating the underside of the tank - thinking it was going to be easier than the top it isn't I wanted to try and do it in as few pieces as possible, so started on the rear main section (which will need two pieces), I needed a double reverse curvature to do the main piece. I couldn't really calculate where the bends would need to be to get a perfect match, the two sides being different geometry didn't help either. I decided to sacrifice a sheet of alloy as a test, then adjust to the results achieved to get the second attempt cock on - thankfully it worked. I now need to start fettling the edges to fit the tank. Before that I might start roughing out the front section in one piece. Then hopefully once the front and rear sections are done I can complete the underside with 1 piece on the centre section too.
Shaping up nicely....i can see you'll be getting headhunted for the next Norton product with workmanship like that.
how about just using the top you have made as a dummy and just put a a plastic 5ltr can under it held onto the frame with cables ties. it will look great.
i think its cos you bring the best out in people exe.. in all seriousness, you probably have access to facilities to mold plastic. worth a thought? 20lts plastic petrol cans are available too.
Decided on paper the finm, I need to check my throttle cable clearance before attacking the aluminium After 3 iterations with paper and adjusting the depth by 1cm to clear the throttle cable route I have a pattern. (I rechecked the scale calculation and I was 1cm too deep anyway so all good) Now marked out on the Aluminium sheet ready to cut, but I have just ordered a Chicken Phal so that's probably it for toady
Front Lower section completed, in the end I had to do the angled side walls as separate pieces, I've left them a tight fit so they can be tacked and tapped in to place as we go. So I suppose I should go back to the tricky rear bit soon after a bit more pondering...