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 procedure for checking high-coefficient rocker arm brackets.
| Identifier | ExFiles\Box 124\3\ scan0429 | |
| Date | 2nd November 1936 | |
| TEST NO. 606-I SHEET NO. 1 NO.SHEETS 6 DATE: 2-11-36 PROCEDURE USED IN CHECKING HIGH-COEFFICIENT ROCKER ARM BRACKETS. --- 1936 Series 60-80-90 Engine on block in cold room. 20-W oil was used. Oil pan insulated to aid warm-up during hot run. Oil temperature taken in main oil line. Alcohol in radiator for -10°F.{Mr Friese} Prod. 140° Thermostat. Water temperature taken in regular fitting at rear of head. Thermocouples and Potentiometer used in temperature checks. Lash checked with feelers (set o .001" to .025"). Valves of Cyl. #6, 7 & 8 checked and average taken. Slot cut in rocker arm cover to permit lash check. No engine fan used. Radiator temperature controlled with blower. Motor hot lashed .015" at 400 R.P.M. Oil & Water Temp. 150°F.{Mr Friese} Cold room then cooled down, water and oil temperature 0°F.{Mr Friese} at start of test. Motor driven at 400 R.P.M. with dynamometer while initial lash check was made and initial temperatures were taken. Motor started with dynamometer and stopwatch started when motor began to run. Speed brought up to 1200 R.P.M. with 50 Ft. Lbs. torque as soon as possible. Reading of lash and temperature taken every 2 minutes for 30 minutes, lash checked without slowing down motor. After 30 minutes speed stepped up to 2400 R.P.M. 100 Ft. Lbs. torque, readings taken every 4 minutes, motor being slowed to 1200 during check and immediately speeded up again. Run continued until maximum difference between oil and water obtained or until water boiled. | ||