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).
'singing' issue with the throttle diaphragm, concluding it's a matter of adjustment.
| Identifier | ExFiles\Box 81\1\ scan0042 | |
| Date | 19th April 1913 | |
| AW/SM2/L19413 Re Throttle Diaphragm. - X.332. Mr Elliott Mr Dalley 19-4-13 In further reply to your instruction sheet 10254 (16/4/13) Mr Hives replies as follows :- "The whole trouble with these "diaphragms seems to be the amount of "lap is not the same on all throttles. "When we were experimenting with these "originally we made them sing by not "having sufficient clearance between the "low speed throat and the diaphragm when "running slow. "This arrangement has run I should "say 20,000 miles on different experimental "cars, and we have never had a complaint "of one singing. We have one on 2301 "which commenced to sing immediately the "engine was run. I do not consider "it a question of design, it is a matter "of adjustment." p. A.{Mr Adams} Wormald. | ||