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).
Specifications and performance graph for an Alfa Romeo clutch and its springs.
| Identifier | ExFiles\Box 124\5\ scan0076 | |
| Date | 11th April 1932 | |
| X448 11.4.32 ALFA ROMEO CLUTCH. Max. Clutch Movement .200" Compressed Length of Springs 2.330" Free Length. 3.030" (Average). Outer Dia. of Coils. 1.930" Dia. of Wire. .236" No. of Working Coils 6 Initial Spring Load 114 lbs. Rating 163 lb/in. Torsional Friction of Assembled Clutch. 100 lb.ft. ALFA-ROMEO CLUTCH SPRING 11-4-32 RATING 163 LB/IN. SPRING LOAD - LB. INITIAL LOAD 114 LB. DEFLECTION - INS. | ||