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).
The substitution of gear cutters for the Condor .666 reduction gear.
| Identifier | ExFiles\Box 38\6\ Scan099 | |
| Date | 23th October 1918 | |
| Ex. To ICI. C. EFC RECEIVED RE CONDOR .666 REDUCTION GEAR - 4240 - X3389. With reference to the new gears -G.6229, 6230 & 6231, please note that until cutters for 8-pitch 20° angle of obliquity are available, we should use 8pitch 14½° angle of obliquity. Da.{Bernard Day - Chassis Design} | ||