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).
Chart from an Ethylene Glycol trial comparing fluid flow against pressure difference for Ethylene, Oil, and Water.
| Identifier | ExFiles\Box 149a\2\ scan0304 | |
| Date | 28th December 1931 guessed | |
| CHART L/421 E ETHYLENE GLYCOL TRIAL FLUID TEMPERATURE ETHYLENE = 190°F OIL = 185°F WATER = 175°F SPECIFIC GRAVITY AT 190°F: 1.08 ETHYLENE AT 60°F: .92 OIL AT 60°F: 1.0 WATER FOR FURTHER DETAILS OF ELEMENT SEE CHART L/421 A 15 TUBES 13" LONG EACH 5/16" O.D. 24G 70/30 BR.{T. E. Bellringer - Repair Manager} LOG. LAW X-AXIS: FLUID FLOW LBS/MIN. Y-AXIS: PRESSURE DIFF. ACROSS ELEMENT INCHES OF WATER | ||