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).
Correspondence regarding the fitment, accuracy, and modification of a dual electric gauge.
| Identifier | ExFiles\Box 175\4\ img222 | |
| Date | 11th August 1936 | |
| X6003 CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. H.M. HOBSON (AIRCRAFT AND MOTOR) COMPONENTS, LTD. INCORPORATING H.M. HOBSON LTD. (Founded 1903), ACCURACY WORKS LTD. (Founded 1911), (FLOATS LTD. (Founded 1920)) REGISTERED OFFICES & WORKS, 47-55, THE VALE, ACTON, LONDON, W.3. TELEGRAMS, ASSEMBLAGE, PHONE, LONDON. TELEPHONE, SHEPHERDS BUSH 3321 (4 LINES) WORKS, ACCURACY WORKS, WOLVERHAMPTON. TELEGRAMS, ACCURACY, WOLVERHAMPTON. TELEPHONE, WOLVERHAMPTON 20786. DIRECTORS. T. P. SEARIGHT, CHAIRMAN. W. M.{Mr Moon / Mr Moore} ILIFF. H.{Arthur M. Hanbury - Head Complaints} BURROUGHES. S.W. HUGHES. J.{Mr Johnson W.M.} MONTGOMERIE. E.{Mr Elliott - Chief Engineer} DODSON. PLEASE REPLY TO -> 47-55, THE VALE, ACTON, LONDON, W.3. OUR REF. TPS/MAB. YOUR REF. Hs{Lord Ernest Hives - Chair}/Std.5/JH. 11th August, 1936. [Handwritten:] STEADMAN Noted Hs{Lord Ernest Hives - Chair}/ST Manufacturers of CLAUDEL-HOBSON CARBURETTERS HOBSON KS TELEAGES HOBSON-PERFECT WINDOW REGULATORS HOBSON SPARKING PLUGS AND THE HOBSON SYSTEM OF AIRCRAFT ENGINE MASTER CONTROLS Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, We thank you for your letter of the 8th August respecting Electric Gauge. We are sorry to note that for the moment the dual gauge is too large at the back, to permit it to be installed in your present panel, because of interference with other instruments. In regard to the accuracy of the gauge we submitted to you, we note with interest your method of checking this, which is, to all intents and purposes, identical with our own. You will appreciate, however, that the sample was hand-written, which would account to some extent, for these slight variations, and so far as a production order is concerned, a margin of error of ± 2°C. should be within our compass. At the essential point, of course, boiling, this should be dead right, as it is our datum. Regarding the fixing of the bulb, we are uncertain yet as to whether this can be modified satisfactorily to accommodate in your cylinder head. We are, however, now arranging to modify one to see if this is possible, the difficulty being that where | ||