From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Design and mounting of rear engine feet for an SS model.
| Identifier | WestWitteringFiles\T\January1929-February1929\ Scan077 | |
| Date | 28th January 1929 | |
| R.{Sir Henry Royce} FROM E.{Mr Elliott - Chief Engineer} Copy to BJ. " HS.{Lord Ernest Hives - Chair} " BY.{R.W. Bailey - Chief Engineer} SECRET. ORIGINAL SS.{S. Smith} ENGINE MOUNTING. X7005 X7380 We send you herewith print of LeC. 2649. shewing the rear engine feet for the above. These feet are mounted on rubbers 9" long. Owing to the foot tube being at an angle with the bearing plate we have shewn these two joined by a forging with four bolted flange this forging being brazed on the tube. The bolting of the foot in the frame has been arranged to favour the step iron which comes directly over this point, and as the step iron we understand is frequently detached the three bolts concerned have been made double ended, the square collar thus formed being enveloped by a pad of aluminium secured to the frame with countersunk screws. We have freedom to alter the number and arrangement of these bolts but the three shewn did not seem amiss. Should any damage occur due to runningboard being smashed there are other bolts to hold the engine The forgings for clamping the foot tube have been made of 2" bore instead of 2.25" used on the Phantom. A 2" tube we think is as strong as the present SS.{S. Smith} foot and the reduction is of advantage in not cutting away so much of the inner rubber, as well as in saving weight. We have shewn a small bolt or pin through the foot forging to fix its correct position on the tube for all time. The hole in the tube can be drilled when the engine is first lined up in the frame. Regarding the end location of the engine this is shewn with an angle as on your sketches, but we have also carried round the double rubbers and used bolts and ferrules in a similar way to the side mounting. E.{Mr Elliott - Chief Engineer} | ||