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 for a fluid wear apparatus, detailing the weight loss of a ring specimen over several days.
| Identifier | ExFiles\Box 132\4\ scan0211 | |
| Date | 20th February 1939 | |
| FLUID WEAR APPARATUS. Test No. RR8. Specimen: ROLLS-ROYCE B.108 Oil: P.4 Gas: O₂ Gas pressure: 40 lb/sq.in. Original weight of ring: 210.0240 g.{Mr Griffiths - Chief Accountant / Mr Gnapp} Final " " ": 209.9960 g.{Mr Griffiths - Chief Accountant / Mr Gnapp} Difference 0.0280 g.{Mr Griffiths - Chief Accountant / Mr Gnapp} Date | Time of start | Time of stop | Running Time | Standing Time | Remarks 20.2.39 | 9.0 a.m. | 4.30 p.m. | 7½ hrs. | 16½ hrs. | 21.2.39 | 9.0 a.m. | 4.30 p.m. | 7½ hrs. | 16½ hrs. | 22.2.39 | 9.0 a.m. | 4.30 p.m. | 7½ hrs. | 16½ hrs. | 23.2.39 | 9.0 a.m. | 4.30 p.m. | 7½ hrs. | 16½ hrs. | 24.2.39 | 9.0 a.m. | 4.30 p.m. | 7½ hrs. | 16½ hrs. | 25.2.39 | 9.0 a.m. | 11.30 p.m. | 2½ hrs. | 3 hrs. | Totals | 40 hrs. | 85½ hrs. Notes: | ||