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 results for an Autovac pump showing flow rates under various valve and tank configurations.
| Identifier | ExFiles\Box 40\4\ Scan315 | |
| Date | 15th October 1929 guessed | |
| PUMP 740 RPM. 5/16 dia pipe 1/4 Bore PETROL LIFT 36" TOTAL LENGTH OF PETROL PIPE 204" BALL VALVE AUTOVAC TESTS, USING ROLLS-ROYCE PUMP RUNNING AT 740 REVS. PER MINUTE. Autovac as supplied to Rolls-Royce. Weight of Float 86 grammes. With Standard Non-return Valve in Suction Elbow. 9 gallons per hour. 2nd. Without " " " " " " 9.5 " " " 3rd. With " " " " " " using Foot Ball Valve. 11.6 " " " 4th. Without " " " " " " " " 11.9 " " " --------- Moving Float & Deep Inner Tank AV.173. 1st. With Standard Non-return Valve in Suction Elbow. 15 gallons per hour d.{John DeLooze - Company Secretary} Without " " " " " " 15 " " " 3rd. With " " " " " " using Foot Ball Valve. 18.5 " " " 4th. Without " " " " " " " " 18.3 " " " --------- Deep Inner Tank AV.173 with Fixed Float AV.234. 1st. With Standard Non-return Valve in Suction Elbow. 13 gallons per hour 2nd. Without " " " " " " 13.1 " " " 3rd. With " " " " " " using Foot Ball Valve. 15.65 " " " 4th. Without " " " " " " " " 15.5 " " " --------- | ||