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).
Graph comparing calorstat tests between a Smith's 'H' Filling and a 'Packless Gland' type.
| Identifier | ExFiles\Box 39\4\ Scan347 | |
| Date | 27th December 1933 | |
| CALORSTAT TESTS COMPARISON BETWEEN SMITH'S 'H' FILLING - TAKEN WHEN STANDARDISED ON PRODUCTION - AND THE "PACKLESS GLAND" TYPE OFF 1 B4 AFTER 10,000 MILES. SHUTTERS "CLOSED" POSITION. "PACKLESS" - 1 B4 SMITH - STANDARD PULL - LB PUSH - LB | ||