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).
Analysis of an engine's design, components, and performance characteristics.
| Identifier | ExFiles\Box 173\2\ img074 | |
| Date | 19th February 1934 guessed | |
| IV that it is short between the bearings. Its overall length is 27.8" cwt 73.25 lbs. Its connecting rod is steel, certainly well pared down with a centre length of 8 3/16". The piston is certainly exceptionally light weighing 9-6 oz. They have had to cut the skirt length, to miss the crankshaft which is one reason it weighs so little, but - it gives reasonable service (T slot used by Cadillacs). The Crankcase and cylinder block are admittedly cast en block cast iron with double flywheel bearing cap and double central bearings centrally about the crankshaft centre line, but the unit is lighter for its displacement than almost any similar American unit I understand. I will try and get the actual weight. I send an instruction book which gives general outline of engine, gearbox etc. They have a rubber type crankshaft damper. Therefore there is nothing mechanically that one can put one's finger on as out of the ordinary to give the result. Thermodynamically they have done a good deal on combustion chamber design to give smooth burning but there is a section here who say a pound of rubber | ||