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 results from a fluid wear apparatus on a specimen ring, measuring weight loss over time.
| Identifier | ExFiles\Box 132\4\ scan0212 | |
| Date | 4th March 1939 | |
| FLUID WEAR APPARATUS. Test No. RR9. Specimen: ROLLS-ROYCE B.109 Oil: P.4 Gas: O2. Gas pressure: 40 lb/sq.in. Original weight of ring: 204.9100 g.{Mr Griffiths - Chief Accountant / Mr Gnapp} Final " " ": 204.8765 g.{Mr Griffiths - Chief Accountant / Mr Gnapp} Difference 0.0335 g.{Mr Griffiths - Chief Accountant / Mr Gnapp} Date | Time of start | Time of stop | Running Time | Standing Time | Remarks 27.2.39 | 9.0 a.m. | 4.30 p.m. | 7 1/2 hrs. | 16 1/2 hrs. | 28.2.39 | 9.0 a.m. | 4.30 p.m. | 7 1/2 hrs. | 16 1/2 hrs. | 1.3.39 | 9.0 a.m. | 4.30 p.m. | 7 1/2 hrs. | 16 1/2 hrs. | 2.3.39 | 9.0 a.m. | 4.30 p.m. | 7 1/2 hrs. | 16 1/2 hrs. | 3.3.39 | 9.0 a.m. | 4.30 p.m. | 7 1/2 hrs. | 16 1/2 hrs. | 4.3.39 | 9.0 a.m. | 11.30 a.m. | 2 1/2 hrs. | 3 hrs. | Totals | | | 40 hrs. | 85 1/2 hrs. | Notes: | ||