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).
Specification and usage list for 40/50 model springs, detailing part numbers, dimensions, types, and stock levels.
| Identifier | ExFiles\Box 67a\2\ scan0002 | |
| Date | 14th November 1927 | |
| TITLE: 40/50 SPRINGS TABLE HEADERS: PIECE N.º | DESCRIPTION | CAMBER AT REST | TYPE OF EYE | MAKER (W=WOODHEAD F=FIRTH) | WHERE MAY BE USED & SERIES | RE-ORDER? | MINIMUM STOCK (DERBY) TABLE DATA: F.4625 | 42 FLAT | 3.5 | FORGED CENTRAL | W | FRONT E TO COMMENCEMENT OF F.W.B. | No | 4 EACH 1000 1050 1100 F.10627 | 42 FLAT | 3.5 | FORGED CENTRAL | F | FRONT E TO COMMENCEMENT OF F.W.B. | YES | 1150 1200 1250 F.812 | 42 FLAT | 3.7 TO 4 | ROLLED UP | W | REAR. 1600 ONLY TILL STOCK EXHAUSTED THEN USE F4247 | No | 4 EACH 900 950 1000 1050 1150 F.4247 | 42 FLAT | 3.75 | FORGED UP | W OR F | FRONT ALL TO END D WITH EXCEPTIONS PRIOR TO 1600. | YES | 1200 1250 1300 F.6431 | 42 x 1¼ | 3.75 | FORGED UP | W OR F | FRONT SPECIAL 1350 LBS FOR ARMOURED CARS | YES | 2 1350 R.1296 | 42 x 2 | 5.5 TO 5.7 | FORGED UP | W OR F | FRONT MANY PRIOR 1100 | YES | 4 EACH 900 950 1000 1050 1100 R.1849 | 42 x 2 | 5.5 TO 5.7 | ROLLED UP | W | REAR ALL PRIOR 1600 | No | 1150 1200 1250 1300 R.1311 | 41 x 2 | 5.5 TO 5.7 | FORGED UP OR ROLLED | W OR F | REAR TRANSVERSE 500 ONLY | AS REQUIRED R.1344 | 41 FLAT | 3.75 | FORGED UP | W OR F | FRONT PRIOR 1600 WHEN A SHORTER SPRING THAN F.4247 IS REQUIRED OWING TO FRAME IRREGULARITIES. | AS REQUIRED F.1090 | 40 FLAT | 3.75 | FORGED UP | W OR F | FRONT STANDARD 1550 TO 1599. (ORIGINALLY ROLLED EYE) | YES | 1 EACH 900 950 1000 1050 1100 R.1272 | 40 x 2 | 5.5 | FORGED UP | W OR F | FRONT EXCEPTIONAL USE ONLY | AS REQUIRED F.1841 | 39 FLAT | 3.75 | FORGED UP | W OR F | FRONT SLIPPER DRIVE CARS. PRIOR 1550. | AS REQUIRED F.1182 | 52 FLAT | 3.9 | ROLLED OR FORGED UP | W OR F | REAR 1700 - 2099 | YES | 2 EACH 900 950 1000 1050 1100 1150 1200 1250 1300 F.1410 | 52 x 1¼ | 4.75 | ROLLED OR FORGED UP | W OR F | REAR DURBAR CARS. (APPROX 17 AT END OF 1600 SERIES) | AS REQUIRED R.1281 | HALF 21x7 | 10.5 | FORGED | W OR F | HALF 700 TO 1599 | YES | 2 EACH 500 525 550 575 600 625 650. F.824 | HALF 24 x 6½ | 10 | FORGED | W OR F | HALF 1600 TO 2099 | YES | 2 EACH AS ABOVE F.71785 | 43.5 x ½ NEG. FWB | 2.6 | FORGED CENTRAL | W | FRONT SILVER GHOST & PHANTOM WITH FWB USE F71975 WHEN STOCK EXHAUSTED | No | 4 EACH 1100, 1150, 1200, 1250, 1300 F.71975 | 43.5 x ½ NEG. FWB | 2.6 | FORGED CENTRAL | F | FRONT ALL FWB | YES SUB-HEADING: CANTILEVER F.10178 | 53 FLAT | 3 | ROLLED | W | ORIGINALLY USED ON THE FEW CARS HAVING CANTILEVER SPRINGS PRIOR TO 2100. MAY BE REPLACED BY ANY LATER TYPE | No F.1722 | 53 x 1" NEG | 2 | ROLLED | W | MAY BE REPLACED BY ANY LATER TYPE | No F.3661 | 54.7 x 1 NEG | 2 | ROLLED | W | USED ON PARTS OF B & C & ALL D CANNOT BE REPLACED BY ANY OTHER SPRING. (NOTE DIFFERENT CENTRES) | YES | 3 EACH 1700, 1800, 1900, 2000, 2100, 2200 | 2 EACH 2300 2400 F.4656 | 53 x ½ NEG | 2.5 | ROLLED | W | MAY BE REPLACED BY ANY LATER TYPE | No F.7801 | 53 FLAT | 3 | FORGED CENTRAL | W | THICK LEAF OBSOLETE. REPLACE BY ANY LATER TYPE | No F.7973 | 53 FLAT | 3 | FORGED CENTRAL | W BOX CLIPS | MAY BE REPLACED BY ANY LATER TYPE | No F.8756 | 53 x ½ NEG | 2.5 | ROLLED | W RR CLIPS | MAY BE REPLACED BY ANY LATER TYPE | No F.9817 | 53 x ½ NEG | 2.5 | ROLLED | W RR CLIPS | MAY BE REPLACED BY ANY LATER TYPE | No F.10667 | 53 x ½ NEG | 2.5 | ROLLED | F W CLIPS | MAY BE REPLACED BY ANY LATER TYPE | YES | 2 EACH 1600, 1700 | 4 EACH 1800, 1900, 2000, 2100, 2200, 2300 | 2 EACH 2400, 2500 F.10612 | 53 x ½ NEG | 2.5 | ROLLED | F W CLIPS | PRESENT PRODUCTION STANDARD DEFLECTION | YES | 2 EACH 1600, 1700, 1800, 1900, 2000, 2100, 2200, 2300 F.10563 | 53 x ½ NEG | 1.9 | ROLLED | F CLIPS | PRESENT PRODUCTION 20% STIFFER 25% MORE | YES F.6432 | 53 FLAT | 2.5 | FORGED | | ARMOURED CARS. BOTTOM LEFT: N.R.G. MAY 1927 BOTTOM CENTER: A.C.G. MAY 1927 BOTTOM RIGHT TITLE BLOCK: Nº OF SHEETS: 2 | SHEET Nº: 1 DOCUMENT Nº: R.1850 STAMP (BOTTOM RIGHT): COST OFFICE ROLLS ROYCE 14 NOV 1927 DERBY | ||