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).
Graph comparing Autovac petrol delivery for a standard pipe versus a 3/8' pipe at various engine RPMs under half throttle.
| Identifier | ExFiles\Box 40\4\ Scan258 | |
| Date | 13th June 1927 | |
| INDUCTION PIPE DEPRESSION (INS MERCURY) AUTOVAC PETROL DELIVERY (PTS/HR) ENGINE R.P.M. AUTOVAC PETROL FEED. EFFECT OF SIZE OF PETROL PIPE ON AUTOVAC DELIVERY. STANDARD PIPE ----- 3/8" PIPE. HALF THROTTLE 13-6-27 | ||