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).
Blueprint comparing two rear leaf spring designs, one with 5 plates and the other with 6 plates.
| Identifier | ExFiles\Box 154\1\ scan0046 | |
| Date | 26th January 1933 | |
| REAR SPRING TO ROLLS-ROYCE DRG F.B. 22 5-PLATES. 750 LBS LOAD. 4" DEFLECTION DUE TO LOAD. 25". 19 1/2". 8 5/8". 9". 20 3/8". TOTAL DEPTH 1.45". MAINPLATE .30 THICK. RANGE OF STRESS TO THE LOADED POSITION 25.0 TONS PER SQ. IN. SEAT 3.575". FRONT EYE. REAR EYE. 1 1/8" MAX TAPER 3". A.{Mr Adams} REAR SPRING TO ROLLS-ROYCE DRG F.B. 22 6-PLATES. 750 LBS LOAD. 4" DEFLECTION DUE TO LOAD. 25". 16". 7 1/8". 8". 17". TOTAL DEPTH 1.65". MAINPLATE .29 THICK. RANGE OF STRESS TO THE LOADED POSITION 24.1 TONS PER SQ. IN. SEAT 3.575". FRONT EYE. REAR EYE. 1 1/8" MAX TAPER 3". B. REFERENCE ROLLS-ROYCE LETTER DATED 24TH JAN 1933. SCALE HALF FULL SIZE. DRAWING No 82. THOS. FIRTH & JOHN BROWN LTD. SPRING DEPARTMENT. TINSLEY. SHEFFIELD. 26TH JANUARY 1933. | ||