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).
Technical drawing of a Hispano front brake with annotations and dimensions.
| Identifier | ExFiles\Box 22\1\ Scan040 | |
| Date | 25th November 1923 | |
| HISPANO FRONT BRAKE. 15.76 DIA. THIS IS THE DIA. IN MEAN BRAKING POSITN I.E. WHEN SHOES ARE JUST IN CONTACT WITH DRUM. 60° FERODO EASED AWAY 1/4" EACH END OPERATING CAM. SHOE. 112° (FERODO) 5.5 RAD. 6.70 RAD. ANGLE BETWEEN SHOE PIVOT & START OF FERODO 38° 19°36' 29°24' 2.00 76° 9.70 FRICTION SURFACE 1 SHOE = 112°. ANGLE BETWEEN SHOE PIVOT & START OF FERODO = 29.5° (APP.) ANGLE BETWEEN SHOE PIVOTS = 17° (APP). ALH 25-11-23 | ||