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).
Test report on foot brake sponge issues for a Bentley model 3-B-IV.
| Identifier | ExFiles\Box 84\2\ scan0165 | |
| Date | 27th June 1934 | |
| FILE. X206 27.6.34. Foot Brake Sponge - Bentley. Tests carried out on 3-B-IV fitted with direct braking to four wheels. With the aid of the servo a 500 lb. pull was applied to the plate lever in the front equaliser, the pull in the ropes then being 237 lbs. To take up all the clearance the movement on the last (3.5 CTS{C. Trot Salt - Carburation} lever) was .450. A further .300 was measured on applying the 500 lbs. load. The movement on the equaliser lever to the rope during the .300 travel was .430, .075 of which is therefore due to the torsion shafts. Measurements taken on the periphery of the drum showed an average increase in diameter of .032 at right angles to the diameter through the operating cam, the radius through the cam being reduced .020. We shall therefore increase the height of the ribs as far as the casting allows to stiffen the drum. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||