Lotus E21 construction report part 23

Cockpit electronics, suspension stuff, exhaust system, brake discs, internal aero and more.

This post sumarizes the work I’ve done over the past two month. A lot of small stuff like fuel fillers or electronic boxes, but also massive projects like front-and rear suspension and exhaust system.

The completion of the car is optimistically aimed to early spring, maybe March. Unfortunately it is too cold now, to do the paint jobs on the balcony. So the flat is a bit smelly from time to time. 😀

The to-do-list is pretty short now:

  • Belts
  • Cockpit padding
  • Brake calipers and cooling ducts
  • Wheels, wheel hubs, wheel nuts
  • PDRS
  • Internal aero
  • Engine cover
  • Rear light

Next to come are the brakes.


Exhaust system is done. The packaging is really thight and it will get interessting to wrap the engine cover around it.


Gearbox and clutch control unit on top of the gearbox housing. BTW. Lotus/Renault is one of the very few teams, which is still not using a carbon gearcase.


Cockpit internals are also done.


Fuel filler – top (red) one is the fuel valve, the bottom (red) one the venting.


Internal aero surface – this secures a clear and low drag tunnel for the cooling air.


Rear suspension


Front suspension – wishbone structure


Front suspension


Brake discs – each consisting from 19 parts


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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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