I also needed a parking brake.
To allow the swing arm to swing I am going to use a pair of M20 high perfermance rose joints.
To fit them I turned a couple of plugs to fit some 50x3mm tube which will form the two sides of the swing arm.
They were drilled to 18mm and tapped to M20x1.5mm.
I then welded the plugs to each end of the tube for cutting to length later.
As with the motor all welds on the swing arm will be ground smooth.
The swing arm will have a single leaf spring under the motor reaching out to the hub and directly under the arm itself so it will be mostly out of sight. To keep the clean open look I will use a lever arm damper mounted in, or just under, the luggage box over the motor and operated by a descrete push rod. That way the rear body work will float above the motor, swing arm and wheel with only a thin push rod between the two and no obvious suspension.
I also picked up a Ford Escort mk1/2 steering rack. It is 140mm wider then the MGB rack and so I can make the front track correspondingly wider. That will help stability and I will be able fit the battery pack better between the chassis rails.
