1927-04-30 — Page 7

SATURDAY, MOTORING SUPPLEMENT.

APRIL 30, 1927.

HINTS

FOR THE

THE HONGKONG TELEGRAPH.

MOTORIST

ALBERT L. CLOUGH

WORM-DRIVEN PASSENGER CARS.

TYPE OF GEARS EMPLOYED.

trouble, agnuming that your 200 MILES AN HOUR. clutch, rear-whool brakes and other transmission controls aro correctly adjusted.

CAUSE OF COIL BURNOUTS.

Question. What causes ́igni- tion coils to burn out? Several of them have burned out on my car. Garage mon toll me that this accident is caused by the ignition switch being left on, but this has Inover happened with my car.

Answer: Failure of insulation is the cause of coil burnouts, but excessive houting of the primary winding may deteriorate the in-

Three-Ton Twin- Engined Car.

Tho following interesting article by H. Massac Buist ap poured in the Observer shortly be fore Major Segrave established

his record.

At the moment Major H. O. D. Sugravé has not the earliest op. portunity to be the first man to travel on land at threo milos o minute, otherwise, at 180 m.p.h.; but, paradoxically, he has the Although in common use for not turn over. This is a manually isulation so that it gives way, Lost chance of being the first man yoare past in England and the meshed drive and all goars soom This overheating is caused by too to ride in a car at 200 m.p.h. The Continent, it is only during the O. K. Upon operating this star-large a current flowing in the explanation of this seoming con. present season that the worm-ter with cover-plate removed, the primary ignition circuit and this tradiction is that, though the drive has appeared upon a rogulur large idler gear seems to mesh may be caused by too high volt-1,000 h.p. twin-engined Sunboam production model of American with the motor gear, but the small age of the electrical system or by car is ready, it is too fast for any passenger car, notwithstanding idler gear fails to engage with the absence of sufficient ballast re-open strotch in this country: the fact that it has been accopied fly wheel. Apparently the fly-sistance in series with the prim-therefore it will leave England Wednesday next on tha practice on American trucks for wheel is to far forward to permit ary coil. Leaving the switch on, on

How could this with the engine stopped, does Berengaria for the United States. engagement- a long timo.

miles of occur? Can yon suggest what sometimes cause laurnouts as the Thore with twenty the trouble is?

full curront then flows contin- straightway-ho will make his Answer: Any change in fly-ously and not intermittently, as first attempt on world's short dis- The form of worm-and-worm-. wheel final drive hore referred to, wheel position seems imponillo in normal service. Evory cail-istance records at Daytona Beach.. may be considered as closely re-and it can hardly le that the star-made to carry a certain primary Florida, about March 20.

There is no Tomoto possibility lated to the spiral-gear drive, ter cnit has moved, as it is bolted current, which should not be ox-

of Major Segrave patting coinmonly used for operating the down and positioned on dewols, conded and in installing a new

the greatest spoed per- distributor and other auxiliaries More likely the gear-shifting coil, you better have the amper-up on engines, and because of the arm has become bent or lease on age drawn by it measured to see formance by travelling faster nature of the tooth action and the its pivots or the spool on the idler that it does not exceed the than any man has done before, large contact areus involved, is shaft, with which the lower end normal. You might also have the because not aeroplanes merely. perfectly silent, remaining so in of the shifter arm engages, is voltage of your electrical system but seaplanes now travel at over. definitely, if adequately lubric.worn. Any of these defects would tested, to see that it is not at 266 miles an hour, wind con- Possibly theditions neutralised. Nothing on ated. The form of worm used is reduce the travel of the small idler times excessive. the multiple-thread variety and, gear, possibly so much that ballast-roll or resistance-unit of land, or water, can hope to move contrary to the mistaken belief would not mesh with the fly-wheel your ignition system may be as fast as man passes through the of any motorists, this gear is gear. The rear edges of the fly-short-circuited, thas letting an air, though he has only begun to perfectly reversible with free whoe gear teeth may be more abnormally large current flow, consting qualities and an effi-chipped than they appear to biologieter ciency as high as any other form making necessary a longer mesh-

of final drive.

DIFFERENT RATION BEADILY

OHTAINABLE.

Whilo its perittanent silence is!

ing movement than originally re quired.'

CLUTCH BRANS FROM,

THICKENED OIL.

Question. In order to start the

its chief claim to superiority, engine of my Ford car, after it possesses the further advantage has stood overnight in the garage, that a very wide range of redue-I have to jack up the rear wheels, tion ration can, be obtained with at the gear into high and sping it, with relatively slight change the rear wheels by hand.

After

in position between the driving the ongine runs for a short time. and driven shafts in other words, if I pull the hand lever back, the within the same housing, Withngine pounds and then stups, but the large reduction ratios, em-after minning the car fora mile ployed with modern high-speer or so, it begins to operate ath engines, a very large ring geadright. What is the reason for and a correspondingly large hous-this?

ing is required, while with worm! Answer: The fact that you drive a housing of smallerspread have this troubic while your on-} may be used and still be ruin oil is gold and that it clears) enough to permit the substitution up, when it becomes warm, is of geurs producing widely differ-retty good evidence that you are ing reductions.

STARTER GEARS DON'T MESH. Question.--When I press the starter pedal of my ear, the inotor whires, but the engine does

using oil which is too heavy and too much affected by cold. If you' will discard your present oil and substituto a light oil that thickensi

minium amount with eokl.

furtheri you simild have

a

01926 OT HEA SERVICE ING

Sometimes wien z girl is

dreamy-cycl she may be dreaming of the other fellow.

"Why on earth don't you use

SOCONY MOTOR OIL

SOCONY SPRING OIL

STANDARD OIL COMPANY

MOTOR OIL

FOR EASY RIDING OF NEW YORK**

ride the wind, and will increase

speed with the lapse of every

your.

:

1.500 C.C. Contrasted With 41,888 C.C.

In measure as you add to ear speed, various intricate problems arise to be dealt with. Much of the knowledge gained concerning wind pressures from aviation practice is applicable-by entire-. ly distinct formations because the problem is utterly different- to motor car practice. Credit is due to Mr. Louis Coatalen for having produced on behalf of the British industry, in the 1,000 h.p. Sunbearrear, the first machine built specially to attempt short distance world's records which looks, and is, a thoroughbred of its kind. Its advent outdates everything of this sort, a remark which applies particularly to thei chassis.

Few motorists soon to realise that the two twelve-cylinder an- gines wed were designed, and examples of that type were actually built, before the Armis- tice was granted to the. Germans nice years ago. Further, when construtore are making such re- markably running with that Grand Prix car types having 1,500 e. supercharged engines, which propel Some of those chassis at 136 m.p.h, it is hi teresting, to, note that each of these 60° V-type twelve-cylinder Sunbeam engines has 22,444 c.c. cylinder content. They are mere- ly adapted to their curront pur- pose, having been designed for aircraft service.

It is a remarkable tribute to Dunlap that their experiments in evolving giant special thin tread type low pressure tyres have justified the Sunbeam ongineers in risking the transmission of 560 h.p. through ench of two tyres, for a four-wheel drive is not am-1 ployed, though, of course, that will be used one day. It has been available in France for nearly a score of years for utility vehiclos

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A Few Advantages:-

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Free Legal Advice. Reliable Drivers Supplied Free Mechanical Advice Associate Membership of this RA. C, and A. A. London.

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P. O. Box 1LG.

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