Allen Millyard comes along with some of his wackiest bike creations, including his award-winning ‘Flying Millyard’, which is powered by a gigantic, 5.0-litre V-twin engine. 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.
source.image: Allen Millyard
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.
Everything is hand made, including the crankshaft and connecting rods, then, in what seems to be the new popular skill among high level engine builders, he created some wooden patterns and cast an aluminum crankcase for the beast.
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The engine can’t be squeezed into a normal frame of any sort, so you end up getting an outsized lump in the center with very long handlebars for the rider out back.
This is the first test run of my 5 litre V Twin engine 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 engine runs a dry sump with twin pumps, twin SU carbs, points ignition with manual advance / retard and twin plugs per head.
