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 specifications and analysis of a Buick Borg & Beck clutch.
| Identifier | ExFiles\Box 124\3\ scan0331 | |
| Date | 5th March 1935 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 13317 Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}3/KW.5.3.35. BUICK CLUTCH. The clutch is a Borg & Beck. The number of springs is 9. Free length 2 5/8". Taken set to 2.5" after 326 engagements in top gear. Taken set to 2.437" after 4400 engagements in top gear. Rating - 156.55 lbs. per inch. Rating at the finish of test - 127.2 lbs. per inch. Working load - 156 lbs. Total load - 1394 lbs. Working length - 1.625". Assembled " - 1.687". Clutch fabrics mounted on central steel disc with 12 steel sections set alternately ) (. Area of clutch fabrics - outer dia. 9.4". inner dia. 6.2". The inner friction plate is the flywheel which appears to be steel. The outer pressure plate is cast iron (?). The drive of the outer pressure plate is taken by three indents pressed inwards of the clutch case pressing. There are three holes 1.5" dia. pressed out of the rim of the clutch outer casing for cooling purposes. A breather is also fitted to the top of the case. The clutch trunnion is a steel pressing made to hold a carbon disc 2.4" outer dia., 1.5" inner dia., .5" thick. (164 lbs/ft. torque at a u of .3.) Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} | ||