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Napier Lion Aero Engine
1936 Citroen Traction Avant 11A is complete... 
click here for more about this project.
The Napier Lion aero engine was the primary power source for the UK airforce from 1918 to the mid 1930s. 
Because it was the most  powerful engine of its time, it was also used for setting speed records.
Notably, versions of the Lion powered the Supermarine S.5 seaplane that won the Schneider Trophy in 1927 and  powered the Napier-Railton race car. In 1935, with an average speed of over 143 mph, that car set the all-time lap record at Brooklands until the race track was closed during WWII.

1:8 scale drawings of the engine are in process with quite a few details still to add. The drawings will be the platform for a 3D printed version of the engine and then, possibly, one or two models of the planes and cars it powered.
There's more to come!
Introduced in 1934, Citroen's Traction Avant, was the first mass-produced front wheel drive car. It also featured an elegant monocoque body construction. With all round independent suspension the car had excellent road holding. An unusually innovative family car, it marked another major step forward in automobile design
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All of the above were good reasons to attempt a 1:8 scale model. Click here for more details.
Click here for a detailed story of the build. (92pp, 56MB)
Scratch built, historically correct, engine, gearbox and front wheel drive assembly.
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