20-10-2023, 07:39 PM
On page 9 of Jonathan Wood's Austin Seven 1999 book it says below a sectioned drawing of the engine:
"The 7hp FN motorcycle engine that provided Edge with inspiration for the lower half of the Seven's power unit. This 52 x 88 mm 748 CC T-head four was introduced in 1914 and reappeared in 1919. The crankcase was aluminium, and Seven owners will recognise the splash-lubricated two-roller-bearing crankshaft."
Stanley Edge said that he gained some confidence from this engine that his crank design would be okay in the Seven engine.
"The 7hp FN motorcycle engine that provided Edge with inspiration for the lower half of the Seven's power unit. This 52 x 88 mm 748 CC T-head four was introduced in 1914 and reappeared in 1919. The crankcase was aluminium, and Seven owners will recognise the splash-lubricated two-roller-bearing crankshaft."
Stanley Edge said that he gained some confidence from this engine that his crank design would be okay in the Seven engine.