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).
Blueprint detailing the design, dimensions and weight of an Alfa-Romeo valve.
| Identifier | ExFiles\Box 179\3\ img030 | |
| Date | 29th February 1932 | |
| WEIGHT OF VALVE COMPLETE WITH INNER AND OUTER SPG RETAINERS = .2320 LBS SCALE 1/1 VALVE: ALFA-ROMEO 2.600" 3.800" 1.290" DIA. 1.150 DIA 30° .12" .925 RAD .297 DIA .34" DIA .940" .225" 1.675 .125 .650 THD. 8m/m x 1P-224 1.290" DIA. CUT IN HEAD .062" WIDE x .750 RAD x .090 DEEP C.R.E.D. DRG No. 29 FEB 1932 | ||