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).
Standardisation Sheet No.3809, confirming the safety of fitting low-pressure tyres to 20 HP cars without hydraulic dampers.
| Identifier | ExFiles\Box 42\1\ Scan065 | |
| Date | 9th June 1926 | |
| X3809 To Hs.{Lord Ernest Hives - Chair} from BJ. Copy to PN.{Mr Northey} Hydraulic Dampers. 20 HP. BJ1/E9/6/26 With further reference to my BJ2/E8/6/26, I notice that on Standardisation Sheet No.3809 concerning the well base rims and tyres on the 20 HP, it mentions that it is safe to fit these low pressure tyres to existing cars without hydraulic dampers. BJ. | ||