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).
Particulars and comparison of front springs for American Chassis No S-167-MK.
| Identifier | ExFiles\Box 42\3\ Scan176 | |
| Date | 17th July 1925 | |
| PARTICULARS OF FRONT SPRINGS OF AMERICAN CHASSIS No S-167-MK.{R. E. B. Meade-King} FURNISHED BY THE R.R. OF RIGHT HAND SIDE FRONT SPRING. THE COLUMN OF SMALL FIGURES REFER TO A SIMILAR SPRING MANUFACTURED BY WOODHEAD FITTED TO A PRE-FRONT-BRAKE CHASSIS. First Table: | | AMERICAN. | WOODHEAD | |---|---|---| | NUMBER OF PLATES | 14 | 14 | | LOAD AT (TRAMMEL ON SPRING) | 1055 LBS. | 1050 LBS | | " " AS TESTED) | 1028 " | 1032 -- | | INITIAL CAMBER (AFTER TEST) | 3.312" | 3.375" | | WEIGHT OF COMPLETE SPRING | 42 LBS. | 39.312 LBS. | Second Table: POSITION ASSUMED BY PLATES WHEN UNDER NO LOAD AND WITH CENTRE BOLT REMOVED. | POSITION OF PLATE | THICKNESS OF PLATE AT CENTRE | GAP BETWEEN ADJACENT FACES OF EACH PAIR OF PLATES | DISTANCE FROM CENTRE TO CENTRE OF EACH PAIR | |---|---|---|---| | | AMERICAN | WOODHEAD | AMERICAN | WOODHEAD | AMERICAN | WOODHEAD | | Top | .278" | .290" | .550" | .550" | .812" | .812" | | 2nd | .258" | .234" | .550" | .550" | .793" | .777" | | 3rd | .229" | .221" | .475" | .475" | .692" | .691" | | 4th | .218" | .211" | .300" | .325" | .508" | .538" | | 5th | .199" | .216" | .425" | .250" | .614" | .463" | | 6th | .180" | .211" | .050" | .175" | .228" | .393" | | 7th | .177" | .225" | .150" | .250" | .330" | .450" | | 8th | .184" | .175" | .175" | .275" | .356" | .452" | | 9th | .179" | .179" | .100" | .175" | .279" | .352" | | 10th | .179" | .176" | .075" | .250" | .251" | .424" | | 11th | .174" | .172" | .100" | .275" | .276" | .452" | | 12th | .178" | .183" | 0 | .100" | .181" | .280" | | 13th | .184" | .172" | 0 | 0 | .179" | .162" | | Bottom | .175" | .157" | | | | | | ||