My design was looking at tubing, drawing inspiration from the Norton frame to come up with a design which matches the clean tubular curves of the frame. Using the AutoCAD drawing to define relationships between engine mounts and frame
Rear Brackets
Tubular bracket design, this gets welded to the cross bar.
The opposing bracket needs to be removable, bolting to the cross pipe, allowing the engine to be removed.
Cross bar, connecting two brackets.
Mounting points, connecting engine mount points to brackets.
Rear Bracket Assembly
Front Brackets
Based on similar principles as rear brackets. The left hand side front bracket is a singular curve which gets welded onto the cross bar.
The challenge with the front brackets is they are not symmetrical as the upper right hand side protrudes by 20mm.This meant having to separate the right hand side bracket into 2 separate brackets.
Lower Bracket
Upper Bracket
Both these brackets get bolted to the cross bar (creating the 20mm difference). These brackets are removable, like the right hand front bracket, allowing the engine be removed easily.
The cross pipe (joining the two sides of the brackets)gets welded to a cross bar on the frame.
Front Brackets in place.
Bracket Quotes
After finishing the design I sent the drawing off to a variety of manufacturers to get some quotes.
3D printing
I looked into 3D printing, uploading the models to Shapeways...
Steel Cold Bending
After receiving an expectedly high cost for 3D printing I looked into more traditional manufacturing methods. I sent quotes to various steel fabrication companies and only received a response from one, FJ Metal. FJ Metal specialize in steel cold bending.
Though the steel cold bending method is not as accurate and is more labor intensive (welding etc. required)it would be a feasible choice if going ahead with bracket fabrication.
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