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).
Proposed designs for the Goshawk I clutch and brake pedal gear.
| Identifier | ExFiles\Box 74\2\ scan0312 | |
| Date | 10th February 1921 | |
| To & from DA.{Bernard Day - Chassis Design} Copy to DR. Copy to EFC. X 3594 X 42HH RECEIVED EFC 12 FEB RE GOSHAWK I - CLUTCH & BRAKE PEDAL GEAR. We send herewith a print of "N" Scheme 751 shewing the proposed pedals made out of oval tubing, similar to a bicycle fork. We have also shewn the clutch pedal with a push rod operating the clutch shaft from on top. The principal difficulty has been to find a good means of attaching the lugs and end pieces to the pedal tubes. On Fig I - the clutch pedal, we shew a forging with an oval hole, which we expect would have to be broached. The lower boss is put in like a bicycle fork crown. It will be seen that the crankpin method of operating the push rod puts a considerable amount of torsion on the pedal, and we have accordingly suggested in Fig 2 that a stirrup might be used, with a sheet metal attachment to the pedal tube, so as to avoid the torsion, and perhaps at the same time, to make the lug attachment easier. On Fig 3 a similar attachment is shewn for the brake pull rod, another method of making the actual attachment to the oval tube being shewn on Fig 4. On Fig 5 another sheet metal construction is shewn, which appeared to us to be cheap and at the same time to take the pull in rather a better way. While on Fig 6 an adaptation of this same arrangement is shewn for the brake pedal. Contd. | ||