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).
Technical drawing of an Intermediate Wheel for a Revolution Counter.
| Identifier | ExFiles\Box 33\5\ Scan077 | |
| Date | 12th January 1926 | |
| Nº OF TEETH: 55 PITCH DIA: 2.750 D.P.: 20 OBLIQUITY: 20° TYPE OF TOOTH: FELLOW'S CHORDAL THICKNESS: .076 2.400 DIA: +00 -10 .450 DIA: +0 -10 .250 DIA: +5 +0 2.850 DIA: +0 -2 1.250: +0 -10 .075: +0 -10 .050 RAD: +10 +00 .075 RAD: +0 -10 .375: +0 -10 INTERMEDIATE WHEEL REV. COUNTER SCALE 1/1 S/N 206 05/12/1/26 | ||