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 weights between the standard and low inertia flywheels for the 20/25HP model.
| Identifier | ExFiles\Box 103\1\ scan0020 | |
| Date | 1st March 1933 | |
| FILE To Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} from RHC.{R. H. Coverley - Production Engineer} XJ-300 RHC{R. H. Coverley - Production Engineer}5/BEL.3.33. 20/25HP. Low Inertia Flywheel We give below comparative weights of the standard flywheel and of the low inertia type flywheel fitted to C.10 Unit in 19-G.IV. Std. Flywheel G.54938........... 68.750 lbs. Low Inertia Flywheel HS.{Lord Ernest Hives - Chair}932........ 39.625 lbs. Reduction in Weight......... 29.125 lbs. RHC.{R. H. Coverley - Production Engineer} | ||