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).
Record of total running time for an HP.3 Blade across different engine builds.
| Identifier | ExFiles\Box 154a\1\ scan0206 | |
| Date | 20th August 1930 guessed | |
| SECTION ITEM NO: 1664/C.0026 SERIAL NO: 987.D PART NO: 6858803 PROJECT: RAXJ 88 Mod from: Mod to: ENGINE: #1 REMARKS: HP.3 BLADE BUILD 1: Total Running Time: 10 Mins 45 Secs BUILD 2: Total Running Time: 1 Hours 57 Mins 28 Secs BUILD 3: Total Running Time: 2 Hours 2 Mins - Secs BUILD 4: Total Running Time: 8 Mins 33 Secs | ||