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 showing the performance of a Smithermet 'J' filling for shutter control, plotting temperature against push and pull forces.
| Identifier | ExFiles\Box 39\4\ Scan237 | |
| Date | 20th March 1931 | |
| SMITHERMET. "J" FILLING. SPECIAL:- PROVISION MADE FOR OPENING SHUTTERS IN THE EVENT OF THE BELLOWS PUNCTURING. ASSEMBLED WITH BELLOWS ALMOST FULLY COMPRESSED SHUTTERS OPEN " CLOSED TEMP °C. PULL-LB PUSH-LB | ||