18/09/2025
Just finished the V8, 16 valve over head camshaft, Hispano-Suiza - an aero engine with a racing car heritage
The main issue was how to upscale an engine to 1/10th scale using Lego engine parts. The crankshaft was enlarged using 6575 technic cams, and the piston rod and bottom end lengthened using 87083 axels and 44 connectors. The cylinder block was enlarged, or rather extended, by drilling 10mm hole into 3022 2x2 plate and adding them to the bottom of the cylinder blocks, and perhaps something Lego could consider as a new part? At this scale, I had room to drive a working overhead camshaft with spring loaded valve rods. The cams are made from Lego cranks by opening up +hole for the technic axels. The engine and its valves all work together, but despite using feather light springs, the bevel gears do occasionally jump as the torque to drive all the running gear is way too high, but it will turn using small movements.
The British built these engines under licence at Wolseley motor factory and named it the ‘Viper’. These light 11 litre V8 engines were used to power the Royal Aircraft Factory SE 5 at the latter end of World War 1. Indeed, they were so good that after WW1 they were installed in racing cars, namely Formula Libre Delage Bequet. Before taking on the licence to build these engines, the British tested a Hispano-Suiza engine and ran it a full throttle for 50 hours, without anything failing. Hispano-Suiza, was named after the Spanish founder and his Swiss parter.
Thanks to Chrome Block City for the nice Copper and Black Chrome parts.
This engine will be fitted into my 1/10th scale Royal Aircraft Factory SE5.