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).
Blueprint for a carburettor flow bench.
| Identifier | ExFiles\Box 122\4\ scan0176 | |
| Date | 13th June 1938 | |
| COUNTERBALANCED HOOD HAVING TWO GLASS WINDOWS IN OPPOSITE SIDES ALL AIR TIGHT JOINTS INSIDE DIMENSIONS 3.0 x 1.10 x 2.0 HIGH LOCATION FOR RECEIVING CARBURETTOR ADAPTOR PLATE THIS IS BOLTED TO THE TABLE TOP AND HAS HOLES TAPPED TO RECEIVE SET SCREWS HOLDING DOWN THE ADAPTOR PLATE THE ADAPTOR PLATE IS HELD DOWN BY SET SCREWS COUNTERBORED FLUSH AND HAS STUDS TO RECEIVE THE CARBURETTOR UNDER TEST ALL AIR TIGHT JOINTS DIMENSION A NOT LESS THAN 4½" DIA. CARBURETTOR TABLE WITH MERCURY TROUGH TO PROVIDE AIR TIGHT SEAL FOR HOOD MIXTURE SEPARATING TANK IMPORTANT TO KEEP VOLUME LARGE A MAXIMUM DEPRESSION OF APPROX 20 INCHES MERCURY TO BE WITHSTOOD COLLECTING TANK FOR FUEL RECOVERED FROM SEPARATING TANK. FLOW TO THE TANK IS INDUCED BY DEPRESSION IN THE MAIN VACUUM PIPE PLATE FOR ENTRY OF PIPES TO THE CHAMBER WHEN SEALED. THE FOUR ENTRIES PROVIDED ARE USED FOR THE HIGH PRESSURE SIDE OF THE DEPRESSION MANOMETER, FUEL LINE, THERMOMETER CABLE, AND SPARE THE THROTTLE CONTROL ROD ENTERS THE CHAMBER THROUGH AN AIRTIGHT GLAND. IT IS ROTATED BY A LEVER CARRYING A POINTER WHICH INDICATES ON A SUITABLY DIVIDED SCALE STUBS TO PREVENT AIR BEING DRAWN IN UNDER TUBING. AIR INLET PIPE MIN INT DIA 6" WATER MANOMETER TO RECORD CARBURETTOR DEPRESSION UP TO 4½" MERCURY. AT WHICH DEPRESSION A CUT OUT VALVE OPERATED. THE VALVE CONSISTS OF A LOADED PISTON WHICH IS RAISED VERTICALLY BY A GIVEN DEPRESSION AND SO BLOCKS THE SUCTION LINE ORIFICE PLATE HAVING SHARP EDGE ORIFICES TO MEASURE AIR FLOW THROUGHOUT THE ENTIRE RANGE (I.E. 0-30 LB/MIN). THIS HAS A GROUND TOP SURFACE ON WHICH GROUND STEEL PLATES MAY BE SLID TO COVER ORIFICES NOT IN USE ORIFICE TANK HAS A MERCURY TROUGH TO PROVIDE SEAL FOR PLATE. DEPRESSION IN THE TANK WILL NOT EXCEED 5" WATER MIN. DIMENSIONS 2.0" DIA x 4.0" LONG TO CARB TABLE THERMOMETER TO READ AIR TEMP IN HOOD MAIN VACUUM LINE MIN INT DIA 6" SUCTION-EXHAUST BLEED LINE MIN INT DIA 4½" HIGH PRESSURE LEG OF WATER MANOMETER CONSISTS OF LARGE VOLUME RESERVOIR GATE VALVE FOR MAIN VACUUM CONTROL MERCURY U TUBE TO RECORD CARBURETTOR DEPRESSION UP TO 26" MERCURY WOODEN INSTRUMENT PANEL AND DESK PIPETTES OF CAPACITIES 20. 30. 100. 200 CC FOR MEASURING FUEL FLOWS A LARGE VOLUME FLOAT CHAMBER TO BE FITTED BETWEEN PETROL TANK AND MAIN TAP TO GIVE A CONSTANT HEAD OF 8FT. STEAM COCK TO CONTROL AIR TEMP IN THE HOOD WATER TO THE VACUUM PUMP MAIN PETROL TAP BETWEEN TANK AND PIPETTES VACUUM PUMP MOTOR CONTROLS GATE VALVE IN THE SUCTION-EXHAUST BLEED LINE EXHAUST TILTED MANOMETER FOR RECORDING AIR FLOW THE HIGH PRESSURE LEG CONSISTS OF A FLAT RESERVOIR OF LARGE CAPACITY. THE TOP END OF THE TUBE RUNS INTO A LARGE RESERVOIR WHICH ACTS AS A TRAP FOR FLUID DRAWN OVER BY EXCESS DEPRESSION. THE TWO ARE CONNECTED BY A PIPE WITH A NEEDLE VALVE IN IT HENCE ZERO LEVEL ON THE MANOMETER MAY BE ADJUSTED. AIR FLOW IS READ ON A MULTISIDED ROTATING SCALE, EACH SIDE BEING CALIBRATED TO A CORRESPONDING ORIFICE WATER SEAL VACUUM PUMP - REQUIRED 25 BHP ELECTRIC MOTOR (SLIP RING TYPE ADVISED) PRICE QUOTED FOR SIZE L6 NASH-HYTOR PUMP COMPLETE WITH COMBINED BASEPLATE FOR PUMP AND MOTOR FLEXIBLE COUPLING AND EXHAUST SILENCER - £252 . 0 . 0 STEAM PIPING TO PREVENT AIR TEMP IN THE HOOD FALLING BELOW 65°F.{Mr Friese} THE PIPING TO BE LAGGED OVERALL. AIR FLOW PIPE MIN INT DIA 6" CARBURETTOR FLOW BENCH. SCALE APPROX 1/8 FULL SIZE T.A.S / 13-6-38 ROLLS-ROYCE. LTD PRINT ROOM BO.11978? DERBY. | ||