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Motorists who require a fast and luxurious car of imposing appearance and outstanding comfort will be attracted by the Morris lsis Six cars offered for 1932. Equipped with a powerful and responsive six cylinder power unit of highly advanced design, mounted in a low and sturdy downswept chassis frame which provides a particularly low centre of gravity, four speed twin top silent gearbox, and powerful Lockheed hydraulic brakes, it possesses a road performance of an extremely high order. Beautifully proportioned and carefully considered in every detail, it is a vehicle of the highest class which is offered at a figure that is only made possible by highly developed produdtion methods.
The superb " Eddyfree " fronted bodies are equipped with Pytchley sliding roofs, inaantly operated from the driving seats, while the furne consumer engine head ensures perfect purity of the interior atmosphere when the car is completely closed.
General Constructionally, the Morris lsis Six consists of an overhead valve six cylinder water, cooled engine with a totally enclosed clutch and four speed twin top gearbox built in unit construction. The power unit is supported in a particularly sturdy deep,s edioned frame by vibrationiess mountings. Long supple semi-elliptic springs, gaiter, equipped and controlled by progressive shock absorbers of the hydraulic type, carry the front and rear axles. The track is 4 ft. 8 in. and the wheelbase 10 ft. 0 in.
Engine The six,cylinder engine has a bore of 69 mm. and a stroke of 110 mm, giving a cubic capacity of 2468 cc., a Treasury rating of 17.7 h.p., and a tax of £18. The six cylinders are earn en bloc with the upper half of the crankcase, which extends well below the crankshaft centre hd is reinforced by unusually generous cross members of box formation at each main bearing location, thus producing a deep girder grudture of particular grength and rigidity.
The six throw crankshaft is carried on four bearings of the large a possible dimensions and is machined all over to ensure a high degree of aatic and dynamic balance. It is finally balanced to extremely close limits by the Olsen method. An overhead camshaft of large diameter, supported in three generous bearings, operates inclined valves through light, but strong, rocker mechanism. The cornbuaion chambers are machined all over by a patented method which ensures complete uniformity of compression, sweetness of running, and the minimum of carbon deposit.
The camshaft is driven by a Duplex roller chain, automatically tensioned by a patented device which restricts back lash and facilitates dismantling. The camshaft chain, in addition, drives two auxiliary shafts from which are driven the oil pump, distributor, dynamo, water impeller and fan. Special provision has been made in the detachable head to permit of its removal for decarbonising without disturbing the timing or necessitating removal of the chain or even its readjustment (a patented feature).
The steel connecting rods of "I" section, machined all over and individually and collectively balanced, further ensure sweetness of adtion, while the big end bearings are of the full ring type with white metal linings in heavy bronze shells. The pistons are of aluminium with three narrow rings, the lower one being of the oil seal pattern. The reciprocating assemblies are balanced as units to within .2 oz. (beam aero engine practice).
Lubrication Full forced feed lubrication is provided by a pump of the spur gear type, mounted externally and carried well below the oil level so that it is selfpriming. Oil is fed under full pressure to all important bearings, and oil cleanliness is assured by a tray pattern filter of exceptional dimensions. The working mixture is supplied by a highly efficient S.U. automatic pistontype carburetter feeding into an induction pipe case integral with the cylinder head. The carburetter is fitted with a horizontally pivoted throttle to ensure distribution without bias, and adequate control over the mixture strength is provided. An air pre heating and cleaning cover is fitted to the head, which consurnes all crankcase fumes, prevents them from entering the body of the car, and materially improves carburation.
Cooling System A water pump driven from the dynamo shaft positives circulates the cooling water from the base of the water jacket upwards. Then distribution of the water is ensured by three suitably disposed outlet ports in the cylinder head. The cooling water is automatically maintained at its msft effective temperature by calorstat,operated radiator shutters, while radiation under extreme conditions is assiaed by an efficient fan of ample dimensions.
Electrical Equipment Ignition is by battery and coil with the diaributor mounted vertically at cylinder head level, an excellent position for servicing or negotiating flooded areas. The dynamo is carried well up on the side of the eniine, where it is readily accessible. The starter motor is of the sliding pinion type. Pinion and toothed flywheel rim are constantly lubricated, ensuring freedom from trouble and smoothness of operation. Lucas Biflex headlamps with dipping refiectors, sidelamps, and reverse lamp, are standard equipment, while all switches, together with the ignition, slow, running adjustment for the throttle, and dipping head larnp mechanism, are mounted in the centre of the steering wheel, thus providing finger, tip control. The instrument panel is provided with diffused lighting. All electrical units are supplied by Messrs. Joseph Lucas Ltd.
Transmission The clutch is of the multi,plate type with cork insert fridtion surfaces running in oil. Its action is light, smooth and certain under all conditions, and its lubrication is automatic. The sturdy, cast iron gearbox possesses four speeds, third being of the silent type. All gears are of case, hardened nickel chrorne steel accurately ground. The robua one piece layshaft is mounted on roller bearings, as is the spigot end of the mainshaft. Ball bearings of heavy duty pattern are fitted to the primary shaft and tail,end of the rnainshaft. A tubular propeller shaft, with Spicer universal joints at either end, transrnits the drive to the spiral bevel final drive gears, which are differential, equipped.
Four Wheel Brakes Fully compensated four wheel brakes of the Lockheed hydraulic pattern are fitted to the Morris lsis Six, and operate in drums fourteen inches in diameter. Maximum braking efficiency is maintained at all times, there being no loa motion or loss of leverage. A powerful hand brake operating on the rear wheels is also fitted. A large petrol tank of seventeen gallons capacity is carried at the rear, and is provided with an accessible filler and efficient pebble guard. Indication of its contents is given by an electric gauge with dial situated on the ingrument panel. Petrol is fed to the carburetter by an automatic petrol lift mounted on the dash.
Steering The steering gear is of the Bishop cam type, extremely light in operation, giving a fine sense of controllability, and perfect safety.
Wheels and Tyres Five detachable Magna type wire wheels with Dunlop cord tyres are fitted as standard.
Tool Kit A full kit of tools is provided with every car, housed in an accessible toolbox, and consisting of :-9 in. adjuaing spanner, three box spanners with tommy bar, cylinder head nut spanner, three double, ended spanners, hammer, triple, lift jack, jack handle, distributor spanner, oilcan, pliers, pressure lubricating pump, punch, screwdriver, sparking plug box spanner, spoon tyre lever, tyre pump, valve grinding tool, wheel brace.
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