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).
The total efficiency formula and a weight breakdown for the Falcon X supercharger components.
| Identifier | ExFiles\Box 42\3\ Scan052 | |
| Date | 4th December 1936 guessed | |
| contd :- -7- (2) Total efficiency. Total efficiency = Air HP. / power input. Air HP. = (n / (n-1)) * (96 W T1 (r^((n-1)/n) - 1)) / 33,000 where W = air delivery in lbs/min. --------------------- FALCON X - SUPERCHARGER WEIGHTS. Lbs. Front half of casing, with volute chamber and rotor bearing 12.88 Rear half of casing with rotor bearing and guide vanes. 10.48 Diffuser vane ring. 3.37 Rotor and pinion. 3.98 Guide unit, complete with case and gears. 15.1 Total weight = 45.81 Hs{Lord Ernest Hives - Chair}/A.A.Rubbra. | ||