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 diagram showing carbon deposits on engine inlet ports after a 17,000 miles test.
| Identifier | ExFiles\Box 83\1\ scan0283 | |
| Date | 5th November 1936 | |
| UNIT 'B' 22 AFTER 17,000 MILES TEST Ex.174 CARBON COLLECTED AS SHOWN ON NOS. 2 & 4 BORES. THERE ARE SIGNS OF HEAVY CARBON DEPOSIT ON ALL INLET PORTS IN SAME POSITION IMMEDIATELY BEHIND VALVE SEATS. NOTE:- HEAD WAS DECARBONISED AFTER 10,786 MILES. INLET PORT. CARBON DEPOSIT. ROLLS-ROYCE. LTD. PRINT ROOM, 5 NOV 1936 DERBY. Ex.174 | ||