11-12-2022, 12:02 PM
Steve, if you can’t find Ian’s info, this is a fairly simple method I used when building my special and is only suitable for the two top parts of the bonnet.
First of all the bonnet tops are turned over to make a 13mm or so inward pointing flange at the hinge area to which you can attach by small screws individual pieces of hinge.
These are made of 20swg stainless steel sheet in my case and are made as follows. Start with a piece of cereal packet as a template and cut a rectangle of 35mm wide approximately by 75 mm long. Using a piece of 8mm bar about 100mm long, bend the 35mm width over the bar and stick the assembly in the vice with the bar horizontal and not gripped in the vice jaws but stuck out above it, the only bits in the vice being the two “tails”. Tighten the vice and there you have one short piece of hinge, albeit in card.
When you are happy with the length of the tails you can now cut out however many you need for the bonnet length in stainless or mild steel and use the same method of squeezing in the vice with the 8mm steel rod as a former.
Alternate pieces of hinge are attached by screws to the two sides of the bonnet.
The 8mm full bonnet length hinge pin can now be fitted. The downturn of the two pieces of bonnet top at the hinge gives you a rigid and square appearance, with no undulations in this area and no screws or rivet heads visible.
My special has separate side panels as the Ulster so no complications of side hinges.
First of all the bonnet tops are turned over to make a 13mm or so inward pointing flange at the hinge area to which you can attach by small screws individual pieces of hinge.
These are made of 20swg stainless steel sheet in my case and are made as follows. Start with a piece of cereal packet as a template and cut a rectangle of 35mm wide approximately by 75 mm long. Using a piece of 8mm bar about 100mm long, bend the 35mm width over the bar and stick the assembly in the vice with the bar horizontal and not gripped in the vice jaws but stuck out above it, the only bits in the vice being the two “tails”. Tighten the vice and there you have one short piece of hinge, albeit in card.
When you are happy with the length of the tails you can now cut out however many you need for the bonnet length in stainless or mild steel and use the same method of squeezing in the vice with the 8mm steel rod as a former.
Alternate pieces of hinge are attached by screws to the two sides of the bonnet.
The 8mm full bonnet length hinge pin can now be fitted. The downturn of the two pieces of bonnet top at the hinge gives you a rigid and square appearance, with no undulations in this area and no screws or rivet heads visible.
My special has separate side panels as the Ulster so no complications of side hinges.