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).
Abridged specification for an S.U. Carburetter for works use.
| Identifier | ExFiles\Box 121\4\ scan0188 | |
| Date | 4th July 1938 | |
| Specification No. 403. S. U. CARBURETTER ABRIDGED SPECIFICATION (WORKS USE) Date 4-7-38 Car: ROLLS ROYCE H.P. and Model Year: 1939 Mounting: OFFSIDE Carb. Size and Type: PAIR H4. DIE CAST BODY No 3266. (WITH THICKENED FLANGE & STEEL THROTTLE BUSHES.) Stud Centres and Dias: Float Chamber Size: FRONT CARB: T2 1208-1161 ON R.H. WITH 1879 NEEDLE SEAT ON BOTH LIDS. Needle: MACHINE TOP SLOTS FROM BOTH LIDS & FIT 1866 BANJO (WHICH IS SUPPLIED IN ADVANCE IN NATURAL BRASS FINISH). 1867 FIXING NUT & 1557 WASHER FITTED. PT Nos 1558 & 1559 TICKLER PINS & COLLARS FITTED ON BOTH LIDS. No UNIONS SUPPLIED. REAR CARB: 3258-1161 THERMO. FLOAT Ch ON R.H. NEEDLE 3134 TO HAVE .008" TAPER & SUCTION DISC 3129 TO BE .435" DIA. FIT STANDARD SPRING (GREEN). Throttle opens: DOWN Throttle Lever Type and Centres and Position: SUPPLY TWO 199 STOPS LOOSE Jet Lever Type: Remarks on Jet Control: .090" ADJUSTABLE JETS AS ASSEMBLY No 54. General Remarks: FIT 3347 THROTTLE SPINDLE ON EACH CARB: FIT 3336 SUCTION PISTON COMPLETE WITH 3328 HOLLOW ROD IN CONJUNCTION WITH HYDRAULIC OIL DAMPER PT Nos 3329, 3330-1-2-3. FIT 3327 (RIGID) SUCTION CHAMBER. FINISH: BLACK ENAMEL FINISH ON CARB: BODY, FLOAT ChR, LID{A. J. Lidsey}, & SUCTION ChR. DULL NICKEL FINISH ON ALL "OUTSIDE" BRASS & STEEL PARTS. Alterations NOT to be made on this Sheet without informing Drawing Office. | ||