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 and data table showing the rating of bellows after puncturing for a Smitherment 'J' filling.
| Identifier | ExFiles\Box 39\4\ Scan242 | |
| Date | 14th April 1931 | |
| SMITHERMET - 'J' FILLING. SPECIAL: - SET TO OPEN SHUTTERS WHEN BELLOWS ARE PUNCTURED. RATING OF BELLOWS AFTER PUNCTURING. Graph: Y-Axis: DEFLECTION - INS. (.050, .100, .150, .200, .250) X-Axis: LOAD - LB. (2, 4, 6, 8) MAX. MOVEMENT .243" RATING 2/.068 = 29.4 LB/IN Table: LOAD ON BELLOWS LB. | DEFLECTION INS. 0 | 0 1 | .031 2 | .068 3 | .099 4 | .141 5 | .170 6 | .205 MAX. MOVEMENT OBTAINED ON SAMPLE .243 MAX. MOVEMENT REQUIRED (E.80893 ARRGt) .425" Stamp: 14 APL 31 DERBY. | ||