Hi everyone,
well the restoration of my haines 16R is in full flight, the floor has been entirely cut-out and the angle grinder has had a serious work out. fibreglass dust is flying everywhere (hopefully not infesting my lungs!).
As part of the rebuild, I am installing a 90 litre underfloor fuel tank. The tank is as shallow as possible being only 160mm high. This was the shallowest tank available regardless of whether the tank held 50 litres or 300 litres, so i couldn't have bought a shallower tank.
The way my hull has been built, the stringers are at there deepest in the middle of the boat and taper off towards the aft end. Since I plan to have the tank at the rear of the boat, i have found that the depth of the tank is fine at the centre end but about 10-15 mm too deep at the stern (ie, sits 10-15mm above the stringers.
So, i need a solution to my problem.....
Is it possible to grind/notch 10-15mm into the centre stringer to lower the tank? I plan to install large bulkheads at either end of the tank which should provide lots of rigidity into the hull.
Or do i need to raise the height of the stringers and frames. Ideally i dont want to do this as the stringers are solid.
____________________________________
On another query, now that the floor is cut out, i need to grind clean areas for glassing. do i only need to grind a 4-6" area extending from the hull to floor joint to key the floor to the hull?
should I grind the tops of the stringers?
Thanks
Nick
well the restoration of my haines 16R is in full flight, the floor has been entirely cut-out and the angle grinder has had a serious work out. fibreglass dust is flying everywhere (hopefully not infesting my lungs!).


As part of the rebuild, I am installing a 90 litre underfloor fuel tank. The tank is as shallow as possible being only 160mm high. This was the shallowest tank available regardless of whether the tank held 50 litres or 300 litres, so i couldn't have bought a shallower tank.
The way my hull has been built, the stringers are at there deepest in the middle of the boat and taper off towards the aft end. Since I plan to have the tank at the rear of the boat, i have found that the depth of the tank is fine at the centre end but about 10-15 mm too deep at the stern (ie, sits 10-15mm above the stringers.
So, i need a solution to my problem.....
Is it possible to grind/notch 10-15mm into the centre stringer to lower the tank? I plan to install large bulkheads at either end of the tank which should provide lots of rigidity into the hull.
Or do i need to raise the height of the stringers and frames. Ideally i dont want to do this as the stringers are solid.
____________________________________
On another query, now that the floor is cut out, i need to grind clean areas for glassing. do i only need to grind a 4-6" area extending from the hull to floor joint to key the floor to the hull?
should I grind the tops of the stringers?
Thanks
Nick