1930-06-14 — Page 15

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THE HONGKONG TELEGRAPH. MOTORING SUPPLEMENT. SATURDAY, JUNE 14, 1930.

IN 31 SECONDS

Marquette

No other car in the world in the mod- acute-price class con match such thrill- ing performance--to to 60 miles per hour in 31 seconds, in high, Buick alone could achieve such quelities of speed, power and stam- ina In a car so moderate in cost. In every phase of performance, Marquette is entirely unmatched is ho Bold] A marvelous flow of power senda you flying.up the steepest grades in high gear. You can ride at 60 or 70 with a wonderful feeling of pleasure

and security. And a host of other feo- turas wins your admiration.

Fisher bodies expressing the best. modem taste. An exclusive non-glore windshield, Exclusivo now upholstery, proof against water, dust and wear. Four Lovelay hydraulic shock absorbers and big Duo-Serve enclosed brakes.

Marquette Is complete with all the fine car characteristics. Yer the liberal G. M. A. C. terms make owning a Marquette very convenient and economical See it. Drive li today.

THE DRAGON MOTOR CAR CO. LTD.

Telephone 30228.

33, WONG NEI CHUNG ROAD, HAPPY VALLEY.

*

WHEN BETTER AUTOMOBILES ARE BUILT... BUICK WILL BUILD THEM

Beautifully Balanced

For Long

Wear

312

DISTRIBUTORS

ALEX ROSS & CO. (CHINA) LTD.

HONGKONG & KOWLOON.

GOOD YEAR

3-20-11

THE STRAIGHT EIGHT VOGUE

Eight-Cylinder-in-Line Engine Reviewed.

MR. HYDE'S

I know, the nicest fellowB gentle-mannered when home,

at

Who change like Dr. Jekyll to

a loathsome Mr. Hyde; They cast their finer feelings. nimbly from them when they roam,

And turn to selfish road-hogs

when they ride.

While youthful, dimpled lasses, who are soft at heart, and sweet, -

Display most fearsome quali

ties, when sitting at the wheel; They'd stop to help a cripple, or

An elder in the street, Yet, driving, they have hearts

of flint or steel.

The NEW

TRIUMPH.

What catalyst or magic brings

this awe-inspiring change? What makes such drivers.

battle for their "rights"? They snarl at ev'ry hindrance and cross-trafic car 'in range,

Each trip becomes one spasm

of vebal fights. Friend Freud might say "Re-

pression. Stifled hopes, to` feel and be:

Dictator of a sphere." Un-

leashed it thrives.. Far better to replace it by the thought that "Courtesy Cost nothing" but it saves n

lut of lives;

The

Silvertown Tyre

Balloon That

At the moment the straight spot incorporated in it to promote eight engine seems to have attain- vaporization. This is rather an ed a certain measure of populari-Important point in view of the ty, and there it remains, "At comparatively long. passage least, that appears to be true of between the carburetter and the its development in Britain, but in end pairs of cylinders. « America it is notable that the

More Carburation "Problems. "six" is now outnumbered by the "eight," there being 46 makes of In some cases the two induction cars with eight cylinders against passages are joined at points close 42 with six cylinders, although into the inlet porta by small pipes one or two cases the eights are of or .by communicating holes, twin-four or V type.

according to the construction of The arguments for and against the inlet manifold, the purpose the straight eight power unit have being to equalise the depressions 'been set forth at length on several within them, so as to assist in

Decasions in the "Autocar," but obtaining the same conditions for allows the design to be kept very to realize that the car of a few briefly the case for It may be all cylinders: Apart from this, compact, When one considers such years hence may be very different- summed up as follows: That it however, care must be taken in possible designs it becomes easy to what is now orthodox practice, has a more even torque, as com- setting the carburetter, to ensure pared with the six, and its that each of its mixing chambers, relatively smaller pistons and delivers the same quality of mix- reciprocating parts make possible ture to the cylinders it supplies. higher crankshaft speeds and, This is not, however, a very dif therefore, greater power.

ficult matter. Incidentally, the Against the eight-in-line it is adoption of supercharging would, argued that its greater overall of course, render easier the dis length takes up valuable space in tribution of the ingoing charge as the chassis and also adds to the the blower would draw mixture difficulties of design and construc- from a single carburetter and. tion. Usually, however, these deliver it, under the degree of arguments against the straight pressure required, through any eight are backed up by particular suitable arrangement of Induc- reference to some other. tyne of tion pipe. engine, such as the twin-four or It will thus be seen that, as Veight, and the twin-six. It is regards-carburation the problems said, quite truthfully, that the involved are similar to those eight is on an equality with the encountered with the four- straight eight in the matters of cylinder engine, which are well torque and lightness of recipro understood, and, in passing, it cating parts, but that it is superior may be said that efficient carbura- as regards compactness of build, tion is by no means easy to obtain

to the particularly as

much with a sixcylinder engine, or, shorter crank case and crank-therefore, with the twin-six or V shaft. The same argument holds twelve. This is a point in favour good in the case of the twin-six of the twin-eight or V sixteen, a versus the straight eight; in fact, type which it seems quite possible it has. additional force, as the will be developed in the future. torque of the twelve-cylinder In this connexion it may be re- engine is better than that of the marked that an arrangement eight, while its reciprocating which would have certain attrac parts are even smaller and lighter. tions would be to set the two There is, however, a fly in the banks of eight cylinders at an ointment, for with the V engine it angle of 180 degrees, that is, is by no means easy to obtain horizontally opposed." But this adequate areas for the big-end would, of course, involve certain bearings, whether these be difficulties in accommodating such arranged with the one forked and a power unit in the chassis bearing on the outside of the beneath the conventional form of other, or whether the one be given bonnet,

a knuckle bearing on the other An alternative arrangement, This difficulty is not insuper- which has already been tried able; many such engines have experimentally, is to set the two been constructed and have given banks of cylinders side by side excellent results. This the prota- vertically on the same crank case gonist of the straight; eight is and to provide two crankshafts bound to admit, but in admitting geared together. This certainly it he probably countera with the argument, "But why not, thên, a twin-eight?".

The argument that the eight-in- line engine has a greater overall length than the six of equivalent cylinder, capacity has, of course, to be met also in the case of the twin-eight versus the twin-six. And it can be met. The increase in overall length is not really very great, and there has been no dif ficulty hitherto in providing suf ficient body space on the straight eight engined chassis without unduly lengthening the wheel. base.

More Torsional Vibration.

Owing to the increased crank- shaft length involved, there is, of course, more chance of torsional vibration being set up in the shaft, but careful design and con- struction can minimize the possi- bility of this happening. After all, the same can be said of the six-cylinder engine crankshaft as compared with that of the four, but torsional. vibration is thoroughly understood in theso days and can be guarded against, so that the eight-in-line power unit can hardly be seriously con- demned on these grounds.

Although the straight eight does not seem to have undergone much development in Britain during the last year. or so, it is, nevertheless, as a type, weil established, and it is quite likely that the attention being paid to it in America will result in it receiving greater attention in Europe:

Regarding details of construc- tion of the straight eight, this sub- ject also has received considerable attention in the "Autocar" at dif- ferent times. It may be said, however, that of the two possible forms of crankshaft construction that known as the 2-4-2 arrange- ment is usually employed. Such a crankshaft may be described as being like a four-cylinder, crank- shaft with half of a similar.crank- shaft added at each end, the end pairs of throws being at an angle of 90 degrees to the four centre throws. The alternative is the 4-4 arrangement, which may be described as two four-cylinder crankshafts joined together, with the throws of one at an angle of | 90 degrees to the other:

The crankshaft arrangement adopted naturally has to be con- sidered in laying out the induc- tion system, and with the 2-4-2 shaft it is usual to employ 3 duplex carburetter, that is, two mixing chambers fed by a common float chamber, with one mixing chamber supplying cylinders 1, 2, 7 and 8, and the other supply- Ing cylinders 3, 4, 5 and 6. The induction manifold is, in fact, split up into two separate paé- sages, and it has usually hot

extra

heavy

Gives

More

Miles and BETTER SERVICE

ALL SIZES in stock Next time -TRY GOODRICH !

Sole Agents for Hongkong and South China: THE CHINA MOTOR SUPPLY CO.

2828A, Des Voeux Road, Central Telephone 21558. Branch Office-486 Yat Tak Road, Canton.

WINNING AGAIN!

Its 3 Major Challenges

Performance with a larger, longer, roomier

Distinction

car...

...with even faster speed

with greater power with quicker acceleration

and Value... in good looks... in real values

.in reliability and economy.......

The common exclamation of everyone when he has ridden in the New Essex Challenger is: ""How did you do it! How do you get this greater power and faster get-away! How do you get this speed?""

It is a new Essex Challenger from front end to tail light. It is a longer, larger car. The Super-Six motor is made smoother and given a wider performance range. The motor retains every advantage you know în economy and long life. It is so distinctly modern in all things that count that you must want to own it.

The bodies are roomy. Three will not crowd the rear seat. There is room for your hat. You'do not have to squeeze into the driver's seat. The clutch and brakes operate at the slightest foot pressure. Proper balance and mechanism make it easier to steer.

This sweeping challenge is for you to know that the New Essex Chal- lenger is a thoroughbred automobile.

The NEWESSEX Challenger

FULL PARTICULARS FROM-

The China Motor Supply Company.

28-28A, DES VEUX ROAD, CENTRAL.

Telephone 21558.

BRANCH OFFICE486, YAT TAK ROAD, CANTON.

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