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).
Radiator restriction tests comparing water flow through various radiator types and components.
| Identifier | ExFiles\Box 27a\3\ Scan042 | |
| Date | 13th August 1939 guessed | |
| RADIATOR RESTRICTION TESTS: A tank of 20 gal. capacity supplied water to the radiator from a head of 3 ft. 6 ins above the top of the matrix. (See Sketch.) The quantity of water delivered direct through the supply pipe in 10 secs. is given and compared with various radiators. (Radiator dimensions see blue print.) | RADIATOR. | QUANTITY OF WATER PER 10 SECS. | | :--- | :--- | | (1) Supply pipe only. | 52.7 lbs. | | (2) V.{VIENNA} series E.73592 8/7 m.m. tubes. | 29.5 lbs. | | (3) Bump Radiator, Almost similar but with 6.5/7.5 m.m. tubes. | 30.312 lbs. | | (4) F.2.B. series radiator E.77644 6/7 m.m. tubes. | 25.8 lbs. | | (6) Radiator giving continuous trouble at high speeds. | 20.375 lbs. | Handwritten note: HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} A definate standard for a 100% radiator of any particular type should be established for each rig | ||