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).
Comparison of development effort units for chassis components between an existing and a proposed model.
| Identifier | ExFiles\Box 148\5\ scan0100 | |
| Date | 19th November 1935 | |
| (Appendix - Sheet 2) As a more equable means of comparison, we have allotted to each feature of the chassis a figure which, in our opinion, represents the unit of development effort which that particular part requires to bring it from the initial design to the production stage. These figures are in red and are naturally exceedingly approximate because obviously scaling up or down throws a big load on the Works but not so much on the experimental. Sections in Production requiring R.R. Design and Development | Name of Section of chassis | Existing 3 Chassis | | | Proposed 4 Chassis | | |---|---|---|---|---|---| | | Units of effort allotted to s section | No. of separate units at present in production | Units of effort these represent | No. of separate units proposed for production | Units of effort these represent | |---|---|---|---|---|---| | Radiator | 2 | 3 | 6 | 3 | 6 | | Front Suspension | 8 | 3 | 24 | 2 | 16 | | Engine Unit | 10 | 2 | 20 | 3 | 30 | | Carburetter | 8 | 2 | 16 | 0 | 0 | | Dynamo | 4 | 2 | 8 | 0 | 0 | | Starter | 4 | 3 | 12 | 0 | 0 | | Ignition | 4 | 2 | 8 | 0 | 0 | | Clutch | 4 | 3 | 12 | 0 | 0 | | Gearbox | 9 | 2 | 18 | 2 | 18 | | Servo | 3 | 2 | 6 | 2 | 6 | | Steering | 4 | 2 | 8 | 2 | 8 | | Frame | 7 | 3 | 21 | 2 | 14 | | Rear Axle | 5 | 3 | 15 | 2 | 10 | | Brakes | 7 | 3 | 21 | 2 | 14 | | Jacks | 4 | 1 | 4 | 0 | 0 | | Rear Suspension | 3 | 3 | 9 | 2 | 6 | |---|---|---|---|---|---| | TOTAL UNITS OF EFFORT: | | | 208 | | 128 | | ||