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).
Comparison of the Moments of Inertia for an R.R. Damper and a Humber type Damper.
| Identifier | ExFiles\Box 132\2\ scan0212 | |
| Date | 8th May 1941 | |
| -cont'd- - 2 - Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}3/SW.8.5.41. Moments of Inertia - lb.in.sec² R.R. Damper. I for friction disc .020 lb.in.sec² Crankshaft Nose .002 ½ the front journal .003 TOTAL .025 lb.in.sec² Humber type Damper. I for flanges nuts etc .023 lb.in.sec² Crankshaft Pinion .008 Fan Pulley .026 Crankshaft Nose .003 ½ the front journal .003 TOTAL .063 lb.in.sec² | ||