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 for various Hermetic fabric couplings on a 130% flywheel.
| Identifier | ExFiles\Box 5\5\ 05-page44 | |
| Date | 5th October 1931 | |
| RESULTS OF FABRIC COUPLINGS TEST. Description. Time Run Hrs. Mins. Total Reversals Average RPM No.1 HA Hermetic 130% flywheel. 5. 30 182,620 276 No.2 HA Hermetic 130% flywheel. 3. 1 101,320 281 No.1 HB{C. E. Harcombe} Hermetic 130% flywheel. 6. 5 205,760 282 No.2 HB{C. E. Harcombe} Hermetic 130% flywheel (1st test) 61. 0 2085,500 285 Ditto (2nd test) 20. 0 673,700 281 No.1 HC Hermetic 130% flywheel. 1. 29 50,060 282 No.2 HC Hermetic 130% flywheel (1 coupling bolt sheared) 56. 16 945,240 280 No.1 HD{Mr Hayward/Mr Huddy} Hermetic 130% flywheel. 4. 13 342,020 281 No.2 HD{Mr Hayward/Mr Huddy} Hermetic 130% flywheel. 3. 55 66,070 281.1 | ||