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).
The incorporation of new increased inertia balance weights for the Wraith III crankshaft.
| Identifier | ExFiles\Box 8\5\ 05-page13 | |
| Date | 29th November 1937 | |
| 617 To By.{R.W. Bailey - Chief Engineer} c. to By/CS. c. to Da{Bernard Day - Chassis Design}/MoS. c. to HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}10/JH.29.11.37. WRAITH III CRANKSHAFT. ----------------------- It has been decided to incorporate the new increased inertia balance weights to Er.1944/5 on the LOP. for the above unit. Will you accordingly instruct that this be carried out and to apply to the 6 units which RHC.{R. H. Coverley - Production Engineer} is to build. The Wraith unit which is to go to France will be fitted with these modified balance weights and makes the Wraith crankshaft balance in line with the balance of the present 30 H.P. We would point out that these increased balance weights apply only to Wraith III and not to Bentley III. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||