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).
Blueprint graph of power curves for a 25 HP Japan Unit, testing various silencing system configurations.
| Identifier | ExFiles\Box 6\7\ 07-page119 | |
| Date | 9th March 1931 guessed | |
| GRAPH II POWER CURVES 25 H.P. JAPAN UNIT 112° CAMSHAFT TWIN ZENITH CARB 26 M/M CHOKES TURBULENT ALUM. HEAD 5.25 COMP RATIO SMALL BORE INDUCTION PIPE INSIDE DIA 1.250 B.H.P. M.E.P. EX. MANIFOLD E.56031 DOWNTAKE INSIDE DIA 1.625 FISH TAIL PIPE 1.812 FISH TAIL AREA 1.5 SQ" ARRANGEMENT E.55734 ① ---- COMPLETE STANDARD SILENCING SYSTEM ② ---- DITTO - SWAN NECK REMOVED ③ ---- - SILENCER & SWAN NECK REMOVED ④ ---- SILENCER S. NECK & DOWNTAKE REMOVED ⑤ ---- STANDARD DOWNTAKE, VORTEX A SILENCER NO SWAN NECK | ||