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).
Letter to Cadillac Motor Car Co. with a sketch of an apparatus for measuring pressure curves.
| Identifier | ExFiles\Box 170\2\ img046 | |
| Date | 23th May 1931 | |
| Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}l/KT. Expl. Dept. 23rd. May, 1931. M.{Mr Moon / Mr Moore} Olley Esq., Cadillac Motor Car Co., Detroit, Michigan. Dear Cy, Referring to your letter of the 16th April. (1) Pressure Curve. FLYWHEEL DRIVEN BY VARIABLE SPEED MOTOR 7.150" 4 1/2" 2FT 9 1/2" 10" RAD The above is the sketch of apparatus we use. The centre of the diagram is practically in the centre of the stroke as you will see from the attached sketch. We will give you an enlarged print of the way the indi- cator drum is driven from the T. lever. The object of the T. lever is to enable us to accomodate any length of arm and both hands of shock absorbers with the minimum difficulty. Our con. rod is so long that we also nearly get S.H.M. We cannot believe the Delco diagrams are right. We always find that if there is a viscosity factor in the valve, i.e. the pressure rises appreciably | ||