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).
Alteration note for crankcase and cylinders detailing dimensional changes.
| Identifier | ExFiles\Box 132\3\ scan0126 | |
| Date | 15th March 1940 | |
| To Rm.{William Robotham - Chief Engineer} 115/RE 117 & 1022 15th March 1940 Ripplet Section 5000 RE. 106. Crankcase and Cylinders Alteration 2 sheets. 1. Boss for Distributor Pipe has been deleted together with the following dims. Side elevation 9.225 +10/-10 from front face 6.460 +10/-10 from bottom face .850 Dia of boss. Note:- Drill .3838+5 Dia Tap .4375 Dia 18 T.P.I. RH.{R. Hollingworth} Section FF 4.803 Height of boss. 2. Spotfacing of 4 Bosses, shown in side elevation, altered from .5625Dia to .750Dia. 3. Thread altered from .3125 to .250 SECTION IN VIEW OF ARROW X added 4. COUNTERBORE .075 DEEP added to holes in Timing Gear facing | ||