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 engine power curves from a 10,000-mile unit test, comparing various exhaust system configurations.
| Identifier | ExFiles\Box 6\7\ 07-page169 | |
| Date | 25th October 1931 | |
| POWER CURVES UNIT FOR 10,000 MILES TEST 18 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} IV C. XI C/R 5.7 CAMSHAFT Sch: 1542/3 STANDARD CARB: 15% LARGER ① OPEN EXHAUST ② COMPLETE PII SHORT TYPE EX. SYSTEM. ④ N.Sch 3285/6/7 WITH FISH TAIL EXIT OPENED TO P I SIZE ⑤ AS 4B FISHTAIL REMOVED ⑤ EXISTING STANDARD UNIT OPEN EXHAUST VALVES BOUNCE 3875 R.P.M. B.H.P R.P.M B.M.E.P. LBS/SQ INDUCTION DEPN. INS. HG. | ||