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).
Test report detailing engine performance, consumption, detonation levels, and identified mechanical issues.
| Identifier | ExFiles\Box 65a\2\ scan0230 | |
| Date | 7th February 1929 | |
| X7770 23-EX. 7-8/2/29 Air Temperature - Carburetter inlet 34°c. } Radiator 19°c. } Water Flow 80°c. 5 gallons. 2 mins.45 secs. 60° to 90°c. 2 mins.30 secs. Petrol Consumption 53 p.p.h. Ignition settings 15° B.T.D.C. 3rd. Gear 1 hour 245 lbs. 2nd " 1 hour 360 " 1st " 1/2 hour. 603 " O.K. for man creeping Power fluctuates at 2250 r.p.m. slightly at 2500 r.p.m. Carburation better than previous run. Detonation seems worse than on previous test - 500 r.p.m. 15 notches from full advance. 750 r.p.m. 9 notches. 1000 r.p.m. slight detonation fully advanced. Engine freedom very good. Water leak at stud in flange bottom elbow - cyld.head to radiator Oil Leaks - Engine good. Clutch from drain hole rather bad, but much improved on last test. Gear Box selector cover at joint of change lever arm badround servo bearing. Axle offside axle tube flange on differential bottom nuts. Propellor shaft throws oil fromt front coupling and universal joint slightly at rear joints. Dynamo charging fuse blows. | ||