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).
Design of clutch and brake pedals for the 'Goshawk I', proposing a more rigid oval section design.
| Identifier | ExFiles\Box 77\2\ scan0092 | |
| Date | 15th February 1921 | |
| To Da.{Bernard Day - Chassis Design} from R.{Sir Henry Royce} c. to CJ c. to Wor.{Arthur Wormald - General Works Manager} c. to Hs.{Lord Ernest Hives - Chair} c. to By.{R.W. Bailey - Chief Engineer} X.3593. RE CLUTCH AND BRAKE PEDALS FOR "GOSHAWK I". X.4253. SCHEME 737 and 751. The clutch and brake pedals for "Goshawk I", must be made without much expense as regards forging and milling. We think two hand forgings of oval section would give much greater rigidity, than the "H" Section you show. We have made a rough estimate of the oval, which is as follows :- A circular section of ½" diameter near the upper boss, and flattened section .5" thick by .9" to 1" deep where the brake rod pull is taken. This section should have flat sides, and ¼" radius at each end, and hence is not really elliptical. The lever should be parallel in depth from where the brake rod joins on down to the pedal shaft. We also send a sketch of how this and other pedals will be made of this particular design, and also where we think the floorboard had better be arranged to form a split in the plate opposite the spindle. The pedals for "Goshawk II" which we are sending you to-morrow, and which you should receive by Thursday morning, will show you our latest work, and our inexpensive designs for this. If one of the brackets on the side tubes was clipped on to that tube, the cross tube clutch operating shaft could be easily got in, if the levers upon it could slide. Contd. | ||