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).
Comparing the particulars of a 'Measuring Autovac' with a 'Standard Autovac'.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan285 | |
| Date | 12th June 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.L. EXPERIMENTAL REPORT. -5- Expl. No. REF Hs{Lord Ernest Hives - Chair}/AHL/LG9.12.25. Instead of the standard useful capacity of .9529 galls. it is reduced to .670 galls. or a reduction of 29.6%. This loss of course will increase the probability of drying up. The following are particulars of the Measuring Autovac as compared with standard Autovac: Measuring Autovac. Standard Autovac. Dia. of float. 3.22" 3.0" Dia. of float chamber. 3.375" 3.375" Stroke of float. 0.65" 0.3" Petrol sucked per stroke. Tank empty 98 c.c.s. Tank full 92 c.c.s. by 50 cc's measurement. Distance from face of float chamber to bottom of flap valve. 6.3425" 5.5" Useful capacity of Phantom tank. .9529 galls. .670 galls. Hs{Lord Ernest Hives - Chair}/A.J.Lidsey. | ||