1948-11-18 — Page 10

THE CHINA MAIL, THURSDAY, NOVEMBER -10, 1940.

AVAILABLE

FOR INSPECTION

IN HONG KONG

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ENGINEERING DEPARTMENT

IGHT

TEL:30331.

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HONG KONG

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ENGINEERING PAGE

RADAR AND RADIO ADVANCES

REDUCE FLYING DIFFICULTIES

Recent developments in radar and radio technique have gone a long way to solving the problem of landing in bad visibility. Really thick fog over an airfield, unless dispersed locally by "Fido" is, of course, still an insuperable ob- stacle which will force an aircraft to wait or land olsowhere.

But so long as a pilot is cble to see the runway once he is over it he can now land safely; in making a blind approach to a point from which he can complete his landing visually he may be "talked down" by Ground Controlled Approach or he may have instruments which tell him where he is in relation to the runway. The GEC radio equipment Path and Localiser receivers to- for instrument landing nowether direct the pilot to his run- being developed at their once he is located the "gale” inboratories.

if the airport. falls into the

The Ringe' part of the Range Jatter category. Ground transmad Leulise receiver unit works mitters direct radio beam at a greater range and helps the which deline the correct land- | pito: "da" Toente his destination ing course, and an instrument Tram lance, It may opernío in the aircraft with two inter on one of three system of track

ecting needles, one vertical aldaneet and the other horizontal. tells the pilot where he is flying in relation to this course.

he By this means

can be brought to a position 50 feet ab vr the centre of the approach end of the runway, and thereafter he should be able to complete hi landing by direct vision with the assistance of the fare path.

Two Units

(a) an aural system now large.

ly

the obsolescent, uning Game Bort of split beam described technique

above; a

a continuous note la

heard when the aircraft iz| on cours but Morze chan acteristics A or N predomi nate if the alreraft divergesį from course to one alde ur the other:

(b) un extension of the visual indicator system used for th Localiser;

Givas Bearing

WORLD'S LARGEST FUNNEL

One of the final stages in the exterier construction of the 34,000-ton Cunard White Star liner Caronia took place re. cently at a Clydebank shipyard when the last section of the

ship 4 placed aboard ever

Waz fitted. largest funnel The funnet is in three sections and la 25 feet 6 Inches wide and 46 feet deep.

and dispersa It contains machinery designed to collect Emoke from the main engines, and dust from publle rooms and cabins. This picture shows the 15-ton section about to be fitted by men on the specially erected scaffolding.

Automatic Telephones On Aircraft Carrier

The equipment in the aircrafi consists esentially of two units, Glide Path Receiver and Range and Lacaliser Receiver, The glide path receiver, which

te A visual indicator system i operates the horizontal nezije, receives signala from a traumit Bunge 31 Localiser

operated by an attachment to th

receiver ter whose radio-frequency energy

which constantly compares the split into two beats which

-3 overlap slightly, their intersee-phase difference between two-

e/s audo-signals,

of which tion forming a straight plane in- |

in radiated dini-directionally and loed at an angle of a few de

the other in

Automatic a revolving beam grees from the ground,

from pole serial calating, at been admitted to a new sphere tower beam la madulat› ed at 150 c/s and the upper bur.p.m. The phase differencs through the Admiralty decision

between the signals received in-

"The

at 90 c/s, and the function of

telephony has f

to instal a G.E.C. automatic

the, receiver is to make a rum, 1 dizales the boaring of the aircrali | 10tenhone exchange in an Air-

from the Beacon; which may or may not be near the aircraft.

tion

beaconinstallations having been of the radio links.

facilities and per-

cere will be provided with an executive right-of-way facility, which will permit the interrup- tion of existing connections In cases of urgency.

British When coupled to the ning comparison between the

'craft Carrier. Although simi- Post Office telephone system. strengths of the modulation. In addition to the above the lar systems have already been eight pairs of wires will permit signale received from the two, Ronge and Legaliser receiver wil installed in many passenger eight conversations and the use beams.

an the permit the simultaneous recep-liners, this will be the first in-of eight teleprinter links. A When the aircraft is

of communication signals stance in which such apparatus single position minut board pro- gikle path the signals will be off

OT has been fitted in one of His vides

enquiry equal strength ani tu horizontal superimposed upon localiser

track guklance siguals. Also in- indicator needle will be at a

Majesty's ship, all previous its the extension of calls via Is a marker corporated central position. Any divergence receiver giving mural

Although the exchange circuits and/o from the slide path is indicated

manual type.

are designed to match all known visual indication by the rise or full of the needles fances from the alport.

"spot" tils

The exchange accommodates telephone systems, the Admiralty the pilot must then fly in

The Glile Path receiver is Pro for domestic and administrative in the more obscure ports, so that Geo extensions and will be used are investigating systems in use wards it to regain course,

vided with eleven alternative Direction Guide

Because of the limited further modifications can be in- channels the Range and Localiser furposes, The job of the Localisez vos Teceiver has fly and embodies ze-of-the batchways, ten units, corporated-to-permit-the-equip relver (a part of the linge and the "Asne" (Automatic Selection ach containing equipment for 5tment to work into them.

be used, these Standard fretensions, will Locallser recelver unit) is

equipment, tof Any Channel) system of fre units being coupled together to ployed in shore installations will operate the vertical needle, which | queneg control whereby local

In view of the gives guidones tu azimuth oscillations corresponding to each ve the size of installation robe used, but

arduous operational conditions lirection. It works on exactly of the 50 frequency channels can

Il desired. the 500 line ex- under which the equipment may the same principle as the Glej be produced by the use of no change can be extended to ac- be called upon to operate, special Path receiver.. Thus the Glidel more than two quartz crytals..

commodate a maximum of 600 recautions have been taken to Ines; by the addition two fur-afford protection against. me- ther 50 line units.

"10-

of

EIGHT TIMES ROUND WORLD

A standard de Haviland jet engine, as used in the "Vam Fire" fubter. recently completed a test equivalent to oight fight around the world at jet fighter speed, and with the uspeiling fluctuations of a "dog fight."

During the ordeal the engine required only. 13.2 houre' maintenance and so survived by far the most Intensive" trimi ever imposed on any sero ongino; platon or turbine,

The picture shows Air Marchal E. J. Cuckney Inspecting the de Havilland "Goblin' engine after its ordeal."

TWYFORDS

SANITARY FIXTURES

AGENT

D. CARTER

quired.

as em

chanical shock. These include

Swiss Precision

MACHINE TOOLS

MAAG Gear Cutting Machine, Typo SH-180. arranged for large internal gear.

SOLE AGENTS:--

SIBER HEGNER & CO., LTD.

TIENTSIN

PEIPING

HONG KONG

87. GEORGE'S BLDG.

PHONE 22625

SHANGHAI

You who recognize

this will recogniza

also that onging packing and jointing should always carry the original brand of Beldams Pilot, in- signia of the Beldam Packing & Rubber Co. Ltd.

SOLE AGENTS:-

The circuits employed pro- the strengthening of certain parts, REISS, BRADLEY & CO, LTD.

vide a complotei guard - apulnat end the provision of rubber anti- maloperation and selected off-shock nountings.

TELEVISION IS GROWING UP

Television sets will account for almost 30 per cent of the dollars spent for radio and telvision receivers this year in the United States, according to Business Week.

Hallmarked Plastics

British plastic products are to have their own hallmark-a small symbol indicating that they have been manufactured according to specifications of the British Ston- dards Institution.

This new

new measure, announced by the British Plastics Federation yesterday, is intended to give the buying public independent

An estimated box-score for the firat nine months of 1040 was given as follows by the maza Elne: Number of radio sets pEG- duced, 10,800,000; estimated value guarantee that the materials and products thus marked conform to (wholesale), $337,500,000; number precise requirements laid down by

The article said one set maker

in

of TV, sets produced, 538,000; es- timated value (wholesale), $134,- ducer."

an authority other then the pro- EnD,0110.

The "Plastic Mark" will be. the form of a circle with the estimules that television receiver initials E.S.

in the centre (in- sales in 1949 will bring the indus- dleating British Standards) and try some $330 million for the the initials B.P.F. (British Pihs- the year's production-of' 1.6 mil- tics Federation) on the left and llon sets. And some manufac-side. It has already been listed turers said their TV dollar sales to a number of leading United had already, surpassed radio sales. Kingdom plastics manufacturers.

was explained that this isn't true for the Industry: as

whole primarily because of

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