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).
Design, specifications and required experiments for a Claudel-Hobson carburettor for the 'Eagle' engine.
| Identifier | ExFiles\Box 121\3\ scan0032 | |
| Date | 31th July 1916 | |
| To Ry. From E.{Mr Elliott - Chief Engineer} c.c. to St.{Capt. P. R. Strong} c.c. to F.A. 1/8/16 X.1482 COPY. E1/W31716. July 31st, 1916. X.2489. RE CLAUDEL-HOBSON CARBURETTER. Please receive herewith drawing No.LeC.608, shewing the features we require embodied in the above. You will notice that not having particulars of the float needle, weights and petrol level, we have made certain assumptions and should be glad if you would go over the matter and see that the job is in order. In drawing the parts in the relative positions shown, we have dropped the float chamber and needle seating so as to obtain a greater non-spilling angle. With regard to the regulatable jet we think it will be necessary perhaps to make two or three trial tapers of cone, since we require that the normal running position will be obtained by lifting the needle the thickness of the lock nut from the dead shut position. We do not know the area of the petrol orifice for a 36 m/m carburettor, adjusted to run on one of our "Eagle" engines, but we find that a 40 m/m jet which we have at St.{Capt. P. R. Strong} Margaret's has two holes of about .050 diameter each for the petrol to run through, and we have rather worked on this information. Will you therefore kindly arrange with Mr Hives to experiment with the taper to obtain the conditions specified on the drg: Drawing No.LeC.608 illustrates the 36 m/m size of carburetter. We have selected this size because we have a drawing giving details of the carburetter body E.6301. The 40 m/m size which we shall be using for the later "Eagles" should be drawn from LeC.608 scaling up where necessary. E.{Mr Elliott - Chief Engineer} [Handwritten in left margin: 1462] | ||