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 the performance of different exhaust systems on a B.80 unit.
| Identifier | ExFiles\Box 109\1\ scan0139 | |
| Date | 21th July 1939 guessed | |
| EXHAUST SYSTEM COMPARISONS ON B.80 UNIT NO FAN - CURVES CORRECTED TO 15ºC AIR TEMP COMPOSITE CURVE. SYSTEMS NOT BEING AVAILABLE FOR COMPARISON ON ONE UNIT ① OPEN EXHAUST ② ADAPTED B.V. SYSTEM ON TIBV ③ ACTUAL BUICK SYSTEM DIRECT OFF CENTURY ④ ADAPTED BUICK SYSTEM AS FITTED TO 30 G VII (S 98) B.H.P. R.P.M. M.E.P. LBS/□" BACK PRESS. INS HG | ||