07-10-2020, 04:00 PM
Why not have a go at building your own? Here’s a paraphrase of what an enterprising and skilled Scott owner reported in the Magazine "Yowl" after building one for his bike. Although their engine capacities are not too far apart, the Scott radiator is, of course, less than half the size of that on a Seven so material and time costs would be considerably greater.
Obtained 1500 pieces of 7mm brass tubing from a Chinese supplier on Alibaba.com All cut to length and polished for £110
Annealed the end of each tube with a blow torch and dropped in water – about 20 hours’ work.
Swaged the tubes using a 7-position, home-made jig held in a machine vice on the table of a drill press. A hexagon punch in the drill chuck was wound down to swage the ends. About 12 hours’ work.
Made a frame with sides complete with screw fitting used to hold all the tubes firmly in place.
Thought about making a soldering tank.
Thought about buying enough solder and flux to cover the bottom of the tank to a depth of 6mm. Price £250
Instead, bought two big rolls of solder (£80) and hand-soldered each tube in place. About 12 hours’ work.
A pressure test, followed by 2 hours of soldering up all the invisible pin-hole leaks.
Made top and bottom tanks, turned up and threaded a filler neck and made a cap.
Soldered everything together.
Send for plating.
Pressure tested again and a bit more soldering.
Easy, eh!
Obtained 1500 pieces of 7mm brass tubing from a Chinese supplier on Alibaba.com All cut to length and polished for £110
Annealed the end of each tube with a blow torch and dropped in water – about 20 hours’ work.
Swaged the tubes using a 7-position, home-made jig held in a machine vice on the table of a drill press. A hexagon punch in the drill chuck was wound down to swage the ends. About 12 hours’ work.
Made a frame with sides complete with screw fitting used to hold all the tubes firmly in place.
Thought about making a soldering tank.
Thought about buying enough solder and flux to cover the bottom of the tank to a depth of 6mm. Price £250
Instead, bought two big rolls of solder (£80) and hand-soldered each tube in place. About 12 hours’ work.
A pressure test, followed by 2 hours of soldering up all the invisible pin-hole leaks.
Made top and bottom tanks, turned up and threaded a filler neck and made a cap.
Soldered everything together.
Send for plating.
Pressure tested again and a bit more soldering.
Easy, eh!