starting RB7s rims

Today it goes on with the rims. It’s an eerie stressful and extensive work to produce such a modern rim out of paperboard. The rear ones are semi finished (valve and lacquer are missing), at the front, the star of spokes’s missing (only the star at the rear rims consits out of 48 parts). But the work pays off if you look at the achievement at the rear axle. The regulated width of 180cm is reached at the rear, at the front it maybe could exceed because of the 4° camber angle (we’ll see that after completion). I’ve considered that in my calculations, but the manufacturing of the components out of paperboard never can be so accurate like the construction – I’ve to calculate with a tolerance of about +/-0,3mm.

The pre fitted rims for regulation tests.

The result of the first finished rim.

Even the nut is centred to the rim. I was afraid, they could be unconcentricaly by attaching because the brake covers leads the rim.

A close-up view of the OZ Racing rim.


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About paulsf1

My name is Paul Bischof. I’m a student in mechanical engineering at the Technical University of Graz in Austria, expected finishing in February 2016. Since I was eight years old, I am building model planes out of paperboard. Since 2004 I scratch (that means building without an assembling set) Formula 1 and sportscars in 1:10th scale. The average time I need for such a car is around 400 to 700 hours within 4 to 8 months. One car has around 3500 up to 5000 single components. On this blog, you can take a look on my work and later, after my studies, hopefully you can see me in Formula 1.

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