Author Topic: Bugatti Type 37 Build  (Read 35175 times)

StefanN

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Have taken the CK from a quick wood and cardboard mock-up that gave us confidence that our outline design will work, through to rolling on 4 wheels.

Rear hubs
We got a standard hub from Gemini Karts but with the studs pulled. The hub has 4 holes on a 100mm PCD.
To allow the hub to fit the wheel we cut about 5mm from the inside face of the hub. Four M8 bolts then hold the hub and wheel nicely.

We cut my 50mm length of Oilite bushing into 4 and pressed these into the wheels using a long bolt, large washers and tightening the nut.  We had to ease the inside of the bushes with some wet and dry to help them slide onto the axle. We assume they got a bit compressed when we pressed them into the wheel hubs.

Following advice, we chamfered the edge of the keyway on the axle where the bushes will be.  The wheel spins very smoothly on the axle with no slop - very pleased.  A split collect on the outside of the wheel keeps it in place with a circlip on the end for good measure.

The attached sketch shows the set-up.

Front axles
The front axle beam is from Gemini and has 16 deg camber and 5 deg caster.  Replaced the bearings on the front wheels with 35/17mm bearings.    Turned a stub axle and welded it to the Gemini yoke at 16 degrees (should have gone for 17 deg for the tiniest bit of positive camber).

The front springs are 35mm x 4mm x 560mm (and about 80mm drop from memory), made by Midland Motor Springs.  They're held onto the front axle beam with standard exhaust U-bolts through a bit of plate.