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).
Endurance test conditions specifying timings, RPM, loads, fuel, and oil parameters.
| Identifier | ExFiles\Box 124\1\ scan0125 | |
| Date | 22th May 1939 | |
| -2- Conditions. The conditions under which the endurance was carried out are as follows. 1st. 18 hrs. Each hour (a) 15 mins. at 3000 r.p.m. 15 mins. at 3500 r.p.m. 30 mins. at 4000 r.p.m. Each 10 hours. (b) 7 hrs. - full load. 2 hrs. - half load. 1 hr. - quarter load. Last 32 hrs. 2 hrs. half load and 1 hr. quarter load in each 10 hrs. run under condition (a). 7 hrs. in each 10 hrs. as follows. 1 hr. at 3000 r.p.m. 1 hr. at 3500 r.p.m. 1 hr. at 4000 r.p.m. 10 mins. at 4250 r.p.m. 5 mins. at 4500 r.p.m. Fuel. Part time on Redline (No.1) fuel, and part time on Shell (No.1). Oil. Motorine 'C' at an inlet temperature to bearings of 100°C outlet 110°C. Press. 35/40 lbs.sq.in. Exhaust. Test bed exhaust system which loses approx. only 5% to open exhaust power. | ||