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 detailing the results of water flow tests on a P.I. No. 7 unit with a standard radiator.
| Identifier | ExFiles\Box 24\5\ Scan357 | |
| Date | 14th October 1930 guessed | |
| WATER FLOWS TESTS ON P.I. NO 7 UNIT STANDARD RADIATOR (E.77675) OFF PRODUCTION STANDARD CIRCULATION LEGEND: R.P.M. 2500 R.P.M. 3000 R.P.M. CIRCULATION UNDER 4 LBS/SQ'' PRESSURE 2500 3000 AXIS LABELS: DELIVERY GALLS / MIN. PRESSURE LBS/SQ'' DEPN LBS/SQ'' BOTTOM WATER TEMP. GRAPH ANNOTATIONS: DELIVERY GALLS/MIN. LBS/SQ'' PRESSURE DELIVERY SIDE PUMP LBS/SQ'' DEPRESSION SUCTION SIDE PUMP | ||