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 drawing dimensions versus actual dimensions for rubber bushes used for semi-isolation between the dash and scuttle.
| Identifier | ExFiles\Box 53\4\ Scan217 | |
| Date | 11th March 1930 | |
| BY.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/AJL. HS{Lord Ernest Hives - Chair}/AJL.1/WJ.11.3.30. SEMI ISOLATION BETWEEN DASH AND SCUTTLE. With reference to HY{Tom Haldenby - Plant Engineer}/EMS/J10.3.30., we find that the rubber bushes etc., supplied by the Dunlop Co., in the same mixing of rubber as used for the 40/50 HP. engine feet are not to our drawing size. The type of rubber is what we require, but the dimensions must be correct to our drawings. We give below the actual dimensions of one of each type of bush received as compared with our drawing dimensions. | PIECE NO. | OUTSIDE DIAMETER | INSIDE DIAMETER | LENGTH | |----------------|-------------------------|-----------------|-----------------| | F.55879. | | | | | Drg. dimension | .625"+ 10 | .250"+5 | .200"+25 | | Actual " | .670 | .250 | .220 | |----------------|-------------------------|-----------------|-----------------| | F.50729. | | | | | Drg. dimension | 1.000" | .266 | .400 | | Actual " | 1.000 | .312 | .393 to .422 | |----------------|-------------------------|-----------------|-----------------| | F.79206. | | | | | Drg. dimension | 1.000" | .266 | .450 | | Actual " | 1.000 | .312 | .475 | |----------------|-------------------------|-----------------|-----------------| | F.79207. | | | | | Drg. dimension | .600 | .266 | 1.500" | | Actual " | .570 | .312 | 1.500" | |----------------|-------------------------|-----------------|-----------------| | F.80727. | | | | | Drg. dimension | .800" | .266 | .350 | | Actual " | .800" | .300 | .335 | Hs{Lord Ernest Hives - Chair}/AJL. | ||