The Type 5 chassis is a modified version of the Type 3 chassis. It incorporates the Mazda MX-5 rear
sub-frame and also has the front structure modified to take standard MX-5 front suspension wishbones.
This is not a practical option as the lower wishbones are quite long and the chassis
changes result in a very substantial reduction in the chassis torsional stiffness.

The chassis is constructed from square tubing. All chassis members are
constructed using 25 mm square steel tube with a 1.6 mm wall thickness.

Clubman Chassis Models

The image above shows the 3D wireframe structure used to perform a simple stress analysis for this chassis design.

Clubman Chassis Models

The image above shows the predicted stress levels (axial stress along each tube) in the chassis structure
due to an applied torsional load. The red colour indicates the most highly stressed chassis members.
Yellow indicates moderate stress levels while blue indicates low stress.

This chassis was tested for theoretical torsional stiffness. A value of 1205 lbs.ft/degree was calculated. 

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