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!