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Aviation History
1921
1921 - 0529.PDF
AUGUST 4, 1921 NOTICE TO AIRMEN Wireless Telegraphy Stations in Operation inConnection with Civil Air Routes IT is notified that:—• The following wireless stations are established for tele-graphic operation ir connection with civil air routes, and are tabulated by countries. The stations are classified asfollows :— CLASS " A."—Statiors directly concerned with flyingoperations, whose routine is primarily intended for aircraft. CLASS " B."—Stations indirectly concerned with flyingoperations, whose routine is not primarily intended for aircraft. (N.B.—All stations use a C.W. system, unless otherwisestated, and all times quoted are G.M.T.) /•—British Isles 1. Class " A " Stations.—Station : Air Ministry (CallSignal: GFA) ; Castle Bromwich (GEC) ; Croydon (GED) ; Didsbury (GEM) ; Lympne (GEG) ; Pulham (GEP) ;Renfrew (GER). ' 2. Class " B " Stations.—Station : Goswick (Call Signal:BVG) ; Lerwick (GEL) ; Poldhu (MPD). 3. Procedure.—The procedure to be adopted for W/Tcommunication between aircraft and ground stations is that laid down in the '' Handbook for Wireless Telegraph Operatorsof His Majesty's Postmaster General," obtainable through any bookseller or directly from H.M. Stationeiy Office,price 6d. Full details of the radio-telephonic routine on 900 metres are given in Notice to Airmen No. 21 of 1921. //.—Belgium4. Class " A " Stations.—Station : BAV).5. Class " B " Stations.—Nil. 6. Procedure.—The W/T procedure for communicationbetween aircraft and Belgian ground stations is similar to that in force in the British Isles, described in paragraph 3above. Brussels (Call Signal: ///.—France 7. Class " A " Stations.—Station : Le Bourget (Call Signal:ZM) ; St. Inglevert (AM) ; Antibes (AK) ; Bayonne (AY) ; Bordeaux (AB) ; Lyons (AL) ; Marseilles (AX) ; Maubeuge(AV) ; Montelimar (AQ) ; Nimes (AN) ; Perpignan (AP) ; Toulouse (AU). 8. Class " B " Stations.—Station : Eiffel Tower (Paris) (Call Signal: FL) ; Brest (F.UE) ; Cherbourg (FUC)'; Strasbourg (C3) ; Toulon (FUT). 9. Procedwie-—-As for stations in the British Isles, described in paragraph 3 above. IV.— Holland ' Stations.—Station : Soesterberg (Call Stations.—Station : Scheveningen (Call in the British Isles, de- 10. Class " A Signal: STBV 11. Class " B Signal: PCH). 12. Procedure.—As for stations scribed in paragraph 3 above. V.— Other Countries 13. Class " B" Stations only in Operation.—Country: Serbia ; Station : Belgrade (Call Signal: HFB) ; Roumania, Bucharest (BNS) ; Hungary, Budapest (HB) ; Spain, Carabanchal (EGC) ; Norway, Christiania (LCH) ; Gibraltar (BWW) ; Sweden (Karlsborg (SAJ) ; Denmark, Lyngby (OXE) ; Germany, Nauen (POZ) ; Czecho-Slovakia, Prague (PRG) ; Estnonia, Reval (ELN) ; Italy, Rome (IDO); Austria, Vienna (OHL) ; Poland, Warsaw (WAR). (Particulars are given in the Air Ministry Notice, of lati- tudes, longitudes, wave-lengths and routine.) VI-—Cancellations Paragraph 1 of Notice to Airmen No. 94 ot 1920, paragraphs 3 and 6 of Notice to Airmen No. 98 of 1920, and paragraphs io to 14 inclusive of Notice to Airmen No. 123 of 1920 are hereby cancelled. (No. 61 of 1921.) - * AN AUTOMATIC BRAKE FOR AEROPLANES AMONG those who have been giving their attention to the subject of stopping an aeroplane in the shortest space, after it has landed, is Mr. James E. Mardon, who was led to think over the problem during the War, and has taken out a patent (No. 139,854/19) for his invention. One of the most serious difficulties in the way of fitting a brake to the wheels of aeroplanes is that of making certain that the full force of the brake cannot be suddenly applied—with disastrous results to such a fragile structure as an aeroplane. That has been the defect from which many of the designs of wheel-brakes for aeroplanes tried in the past have suffered—they tend to turn the machine over on its nose. Realising this, Mr. Mardon has devised a scheme of brakes operating on the aeroplane wheels, in which, while the brake-lever brings the brake-system into operation, it only does that, the brake itself being gradually applied with a gradually increasing pressure through the action of a dash-pot or some similar device. A further development of the device is shown in the drawing; here the brake is automatically applied as the machine lands. A hand brake-lever of the usual type is employed, and when it is in the " off " position the special skid A is- drawn up clear of the ground, but when it is put in the "on" position this, skid is lowered, so that it can make contact with the ground before the tail skid proper touches. From this it will be seen that the b'rakes are not applied by the movement of the lever; that only brings the brake-skid, as it may be termed, into position so that it can automatically apply the brakes on the wheels when the machine lands. In this arrangement, as in the hand- operated design, there is a dashpot, B, which allows for the gradual application of the brake, thus preventing any violent retardation with its risk of overturning the machine. In the diagram the brake shown is of the band variety, but it need hardly be said that the system can be adapted to any type of brake acting on the wheels. Similarly it is possible to vary the arrangement of brake-lever or to utilise other methods of putting the system in operation, according to circumstances. Tokyo Civil Air Port THE Japanese authorities, it is announced, are making preparations for establishing an aerial port near Tokyo. tJrawa, the capital of the prefecture of Saitama and situated at a distance of 30 minutes by train from Tokyo, is reported to be the probable site. Mr. Hata, the Vice-Director of the Aviation Bureau, states that the aerodrome which is contemplated by the authorities is of an entirely different nature from the military aerodromes "at Tokorozawa, Kagamiga-hara, etc., and is intended to be the first of many aerodromes of the kind to be constructed in Japan, Korea, Saghalien, etc. It is to comprise a training ground, landing-place, warehouses, customs house, hospital, wireless installations, a signal tower, etc., and also equipment connected with aviation at night to be prepared according to the requirements of the Air Convention. As this new air port will be placed under the control of' the Imperial Japanese Aviation Bureau, it would become an important military organ in time of war. In time of peace, however, it will be a welcome training ground for civil aviators, who have long felt the necessity of such a ground. 529
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