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).
Investigation into improved 20 HP starter stops to prevent sticking, proposing to standardise the circumferential teeth type.
| Identifier | ExFiles\Box 40\5\ Scan197 | |
| Date | 1st November 1927 | |
| To R: from Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} X3587 Hs{Lord Ernest Hives - Chair}/GWH{George W. Hancock - Head Chateauroux}2/LGS.11.27. 20 HP. STARTER - IMPROVED STOPS. X5650 We have been investigating 'stops' to prevent sticking in the off position. The stops that have been tested are single cone with angles of 45° and 60°, ball race type and circumferential teeth. The single cone stop is not as reliable as either the ball race or the circumferential teeth types. We find that with this form of stop there is friction between the two surfaces which on occasions is sufficient to hold it in the 'off' position. The ball race type and the circumferential teeth are, from the tests taken, free from sticking, both have proved reliable stops. The circumferential tooth type is slightly noisy, as a metallic sound comes from the teeth when the unit is returned after starting. Of the two schemes the circumferential teeth would be the easiest to produce. We propose to standardise this scheme. Hs{Lord Ernest Hives - Chair}/G.W.Hancock. | ||