Home WORLD Flying Millyard 5 Litre V Twin Powered Motorcycle

Flying Millyard 5 Litre V Twin Powered Motorcycle

The Flying Millyard is a home-made creation from Allen Millyard, the brilliant engineer who has become well known through the series of spectacular multi-cylinder bikes that he has built over the last two decades. The custom built en 5.0 L (5000 cc/305 ci) V-twin engine is bult from two Pratt & Whitney R1340 aircraft cylinders.

source/image(PrtSc): Allen Millyard

This is the first test run of the Flying Millyard bike. The engine was made around a pair of Pratt & whitney aircraft cylinders and has a 5 3/4 inch bore and 5 3/4 inch stroke.

Lubrication is dry sump with a 1 gallon tank integral with the petrol tank. Wheel base is 8 ft and the overall height is 4 ft to the bars. A four speed hand shift gearbox is geared for 120mph @ 2000 rpm in top.


The 5 litre V Twin engine is based on two Pratt & Whitney R1340 aircraft cylinders, all other parts are hand made including the crankshaft, con rods and crankcase wooden moulds, the crankcases were then cast in aluminium.

The “Flying Millyard” 5 Litre V Twin first test run

The engine runs a dry sump with twin pumps, twin SU carbs, points ignition with manual advance / retard and twin plugs per head.The bike’s wheel base is 8 feet and the height is 4 feet to the bars.