Alterations to the Hawk Northcliffe Chassis for the piston and gudgeon pin.
| Identifier | ExFiles\Box 41\1\ Scan069 | |
| Date | 2nd February 1920 | |
| X.3773 To RHC {R. H. Coverley - Production Engineer} from DA {Bernard Day - Chassis Design} /Stt. C. to Ck. {Mr Clark} DA {Bernard Day - Chassis Design} /Stt8/EF14. 2. 20. X.3773 Hawk(Aero Engine) Northcliffe Chassis. We send you herewith two blue prints of the following details in connection with alterations :- 1929/N N. 2944 Flexible Split Piston Alteration Compression ratio 4.25 to 1. The following dimensions have been added .400+10, .200+5. 1938/N N. 2962 Gudgeon Pin for Hawk(Aero Engine) Northcliffe. Alteration Added Slot .150+10 deep and .125+15 wide DA {Bernard Day - Chassis Design} /Stt. | ||
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).