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).
Modifications for the 40/50 four-wheel brake system.
| Identifier | WestWitteringFiles\K\December1923\ Scan7 | |
| Date | 12th April 1923 | |
| TO BY.{R.W. Bailey - Chief Engineer} FROM DA.{Bernard Day - Chassis Design} c. to GI c. to RG{Mr Rowledge} c. to HS.{Lord Ernest Hives - Chair} 40/50 - FOUR WHEEL BRAKES. X9940 We send herewith N.Scheme 1707. shewing the general arrangement of the front of the car with the method of axle control decided upon in the last conference. that is to say the springs are anchored at the back and shackled at the front, the radius rods are dispensed with. the lock is improved until it is better than the standard 40/50 and the existing tie-rod fittings and steering gearbox are restored. We have tried to use the existing side steering tube but we find it is not convenient to do so, and we have accordingly modified the set. The size of the tube, the ends, etc, are standard. The springs are lengthened to 45" and the free deflection is reduced 25%. We shall be sending you particulars of these springs in the course of a day or two. In order to get the long springs in we have bent up the front horn. We wish to increase the thickness of the rubber buffer to prevent overstressing of the springs with thicker plates. It will be noticed that it is necessary to go back to the sleeve under the spring "U" bolts in the manner shewn on N.Scheme 1317. There will however be many axles on which the keys have been machined off, in which case it will be necessary to use the type of sleeve having pegs formed solid with it and fitting into holes in the axle. We shall shortly send you instructions shewing how the increased steering locks can be obtained in spite of the front brake control rods. DA.{Bernard Day - Chassis Design} | ||