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).
Letter to The Normal Engineering Company detailing the requirements for a vacuum pump for a carburetter rig.
| Identifier | ExFiles\Box 122\4\ scan0148 | |
| Date | 8th June 1938 | |
| EXPERIMENTAL DEPARTMENT. Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}15/JH. 8th June, 1938. The Normal Engineering Company, Hytor Works, Commerce Way, Purley Way, CROYDON. For the attention of L.F. Padgham Esq.. Dear Sirs, 1036 Further to our letter of May 12th. we are now able to state more exactly our requirements with regard to a "blower" for use with a carburetter rig. In the first place the term "blower" was used rather loosely, a vacuum pump being implied. The pump would have to handle an amount slightly in excess of 400 cu.ft/min, say 450 cu.ft/min. Maximum depression would be 20" mercury. With regard to electrical conditions, the standard current is 200 v.{VIENNA} 50 cycles frequency. We would be glad of your advice on the type of motor which it would be best to use. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||