Comparative test of a standard fan versus a Cadillac fan for the Phantom III, chassis 31-EX, focusing on cooling and noise.
| Identifier | ExFiles\Box 91\3\ scan0118 | |
| Date | 7th October 1935 | |
| To E. {Mr Elliott - Chief Engineer} c. to Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} +300a (2) Hs {Lord Ernest Hives - Chair} /GWH. {George W. Hancock - Head Chateauroux} 33/KW.7.10.35. Phantom III. 31-EX. Comparative tests between the present fan and the Cadillac rubber mounted blades, self acting. Standard Fan. Cadillac Fan. Engine Revs. 225-250 225-250 Starting temp. 78° 78° Time run. 10 mins. 10 mins. Finishing temp. 89° 89° Rise of temp. 11° 6° The Cadillac fan, tested for comparison in noise, was 25% quieter at 55 m.p.h. At 80-90 m.p.h. 10-15% quieter. Hs {Lord Ernest Hives - Chair} /G.W.Hancock. | ||
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).