22-12-2018, 06:55 AM
(21-12-2018, 11:33 PM)Colin Morgan Wrote: The second patent on the plate says "Connecting Rod Lubrication". Not sure what the patent covers, but suggests Stanley Edge or Sir Herbert had a hand in it?
Colin
The Bugatti Trust notes-
"During testing in 1921 Bugatti struggled to achieve success with this bottom end lubrication system. A large volume of oil at low pressure would be needed to fill the deep annular grooves in the crank webs against centrifugal force. Double oil pumps had been tried but the total theoretical clearance of 22mm2 for the oil to leak out of the system before any would get to the big ends was too much. Bugatti’s solution to this problem was his invention to inject the oil deep into the crank grooves with cross drilled jets which became the well known standard Bugatti arrangement applied to all Types from 1923".
The Bugatti system, while using a jet to feed oil to the big ends it seems to be quite different arrangement to the Austin 7 jet and would allow a patent to be applied for - whether Stanley or Herbert came up with this doesn't seem to be mentioned.