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).
Weight breakdown of damper parts for R.R. Wraith, Humber, and Studebaker types attached to a crankshaft.
| Identifier | ExFiles\Box 132\2\ scan0210 | |
| Date | 30th April 1941 | |
| Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}4/ET.30.4.41 - 2 - Weight of the damper parts attached solidly to the crankshaft on A.{Mr Adams} R.R. WRAITH TYPE DAMPER. Friction disc. 1.69 lbs. B. HUMBER TYPE DAMPER. Driving flanges, nuts, etc... 3.51 lbs. Camshaft gear. .58 " Pulley, starter dog, etc... 2.66 " Friction discs and bush. .13 " ----- Total 6.88 lbs. C. STUDEBAKER TYPE DAMPER. Driving flanges, pins, etc... 2.66 lbs. Camshaft gear. .58 " Pulley, starter dog, etc... 2.66 " Friction washer, ferodo bush & springs. .17 ----- Total 6.05 lbs. These are all static weights. In the calculation of the moments of inertia, a radius of gyration of 1 1/2" was assumed in each case. Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden} | ||