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 showing oil cooling dissipation and pressure drop for a specific tube configuration in a free air stream.
| Identifier | ExFiles\Box 149a\2\ scan0308 | |
| Date | 23th August 1935 | |
| OIL COOLING CX.{Major Len W. Cox - Advertising Manager}107/2. DISSIPATION OF TUBE C(o/16) ONE TUBE IN FREE AIR STREAM FORMULA 22/3/8/19/1.814/23.1/43.3/1/8 No 30 BUTT INTERNAL WOUND 22G COPPER. OIL MEAN TEMP = 170° F AIR INLET = 70° F AIR VELOCITY = 1,200 FT/MIN OIL FLOW = 20.5 LBS/MIN (MOBILOIL A) Left Y-Axis: OIL PRESSURE DROP LBS/IN²/FT. RUN. Right Y-Axis: B.T.U.'S. PER. HR. PER. FT. RUN. AT. 100° T.D. AIR. INLET. TO. OIL. MEAN. Top X-Axis: AIR VELOCITY FT/MIN Bottom X-Axis: LBS/MIN/TUBE. Graph Lines: DISSIPATION TO OIL FLOW DISSIPATION TO AIR VELOCITY OIL PRESSURE DROP TO FLOW Diagram: 7"RAD, 3/4", 1/2" Signature: EWS | ||