Hand-drawn diagram showing the layout and dimensions of a Hispano front brake system.
| Identifier | ExFiles\Box 22\1\ Scan033 | |
| Date | 1st February 1924 | |
| HISPANO FRONT BRAKE. 15.76 DIA. THIS IS THE DIA. IN MEAN BRAKING POSITION. I.E. WHEN SHOES ARE JUST IN CONTACT WITH DRUM. 60°. OPERATING CAM. FERODO EASED AWAY 3/4" EACH END. 112° (FERODO). SHOE. ANGLE BETWEEN SHOE PIVOT & START OF FERODO. 5.5 RAD. 6.70 RAD. 38°. 8°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). | ||
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).