Lotus E21 construction report part 25

Brake ducts, wheel hubs, cockpit padding, start designing engine cover and internal aero devices.

The brake ducts/drums are pretty complex shapes, but were fun to build. They are, even if they are 2013s, actually not less complicated than 2017 brake ducts. The packaging of the whole brake ventilation stuff is impressively thight (as almost everything is on this car – but not that extreme as the 2014 upwards car generation). The rear drums feature a row of little wings to generate downforce directly at the wheel. The front ducts only feature a few vanes.

The wheel hubs are relatively simple shapes, but each consisting of 16 parts. Front and rears are almost identical.

One of the most complicated things to design and manufacture is the cockpit padding. In real-life, it is filled with a foam. My one includes a structure inside and is covered by black paper. The difficulty here is, that the cockpit opening is not to 100 per cent exact (means also not 100 per cent symmetric). So I had to design the padding not to the exact original measurements but to the model’s shape – finally it is slightly asymmetric, but it fits pretty well.

Probably the most complex part on the entire car is the engine cover. Same as the cockpit padding, its shape has to be designed to the already existing bodywork on the model. Surprisingly the first design was already pretty good. Just two prototypes had to be designed till the right shape was found.

Remaining to-do’s:

  • Finishing rain light
  • Wheel nuts
  • Wheels
  • PDRS
  • Engine cover
  • Internal aero

I don’t like to place another completely wrong estimated date of completion – like I’ve done in the previous post. 😂

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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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