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).
Test report detailing pressure readings taken from the filler tube and over the starter motor under various conditions.
| Identifier | ExFiles\Box 91\4\ scan0057 | |
| Date | 2nd July 1935 guessed | |
| ( 2 ) Position of pressure taken, filler tube and just over end of Starter Motor. M.P.H. FILLER TUBE O.S. M.P.H. OVER STARTER-MOTOR. N.S. 20 0.1" 0.2" 20 0 30 0.1" 0.2" 30 0 40 0.1" 0.2" 40 0 50 0.1" 0.2" 50 0 60 0.2" 0.4" 60 0 70 0.2" 0.4" 70 0 80 0.2" 0.4" 80 - 0.1" 0.2" Filler tube O.S. with breather pipes to rockers, dismantled holes left open in rocker covers. 20...........0.1" 0.2" 30...........0.1" 0.2" 40...........0.1" 0.2" 50...........0.2" 0.4" 60...........0.4" 0.8" 70...........0.5" 1.0" 80...........0.75" 1.50" With Car standing full revs. O.S. pressure 0.4" A further test to be taken with breather holes stopped up in rocker covers. --------- G.W.Hancock. G.W.H. | ||