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Aviation History
1921
1921 - 0512.PDF
JULY 28, 1921 NOTICES TO AIRMEN .y Aerodromes for Civil Use : Consolidated List IT is notified that : 1. Aerodromes, seaplane stations and landing grounds, open to civil aviation in the United Kingdom, and service and civil stations, available to civil aircraft in case of emer- gency only, are now given in lists which have been corrected to* July 1, 1921. 2. The lists are classified as follows, each aerodrome or landing ground being given in alphabetical order :•— LIST A.—Government-owned aerodromes available for civil flying, at which accommodation exists : (a) Civil Aerodromes, (b) Service Stations. LIST B.—Aerodromes available for civil machines in emergency only : (a) Permanent Service Stations, (b) Stations temporar- ily retained for Service purposes, (c) Civil Stations. LIST C.—-Licensed Civil Aerodromes : (a) Civil Aerodromes licensed for all types, (b) Civil Aerodromes licensed as " Suit- able for Avro 504 K and similar types of aircraft only." LIST D.—Unlicensed Private Aerodromes. Aerodromes available for civil machines only by special permission of the owners, or in emergency. Notices to Airmen Nos. 33, 35, 39, 43, 45 and 51 of the year 1921 are hereby cancelled. (No. 56 of 1921.) Pitgts' Licences : Compulsory Examination in Ele- mentary Meteorology , ; IT is hereby notified :— With reference to Notice to Airmen No. 28 of the year 1921, by which every applicant for a pilot's licence to fly passenger or goods aircraft (Class " B " Licence) or for a renewal of such licence, will, from a date to be notified later, be required to undergo an examination in elementary meteorology. A sylla- bus of the examination is now published by the Air Ministry for the guidance of candidates. The answers to the questions in this syllabus may be found in Lempfert's " Meteorology," published by Messrs. Methuen and Company, Ltd., 36, Essex Street, London, W.C. 2, price 75. 6d. (No. 55 of 1921.) Lympne Aerodrome : Cloud, Visibility and Weather Signals (i) A REVISED system of ground signals to denote to pilots the height of clouds, visibility and weather at Biggin Hill and Croydon aerodromes will be brougnt into operation at Lympne aerodrome on July 14, 1921, in substitution for the existing system, described in Notice to Airmen No. 24 of 1921. (2) The signals will consist of two groups, one referring to Biggin Hill, to be prefixed by the letter " B," and the other to Croydon, to be prefixed by " C." (3) This letter will be followed by two figures and one sym- bol. The first of the two figures will refer to the height of the base of the cloud, the second figure to the visibility, and the symbol to the weather. (4) The scales for the height of the cloud, the distances of visibility, and the symbols for weather are as follows :— (a) Height of Cloud 0 means cloud below 50 metres (= 1.50 feet.) 1 ,, ,, 100 ,, (= 300 ,, ) 200 ,, ( = 600 T, ) 3 .. ., 3oo ,, 4 >> •> 4°° •> ,, 5°° > • ,, 6oo „ 7 .. .. 7°° -. 8 ,, „ 8oo above 900 ,, (b) Visibility o means visibility less than ( (= 1,000 1.300 2 3 (= 2,000 (= 2.300 (= 2,600 ( = 2,600 500 yards. 1,000 ,, 2,000 ,, 3,000 ,, 13 Engine Delivery by Air A NOVEL method of delivering an engine by air is reported by the U.S. 4th Air Squadron at Haiti. One of the submarine chasers broke down at Aux Cayes, en route to San Domingo, and a new engine part, weighing 90 lbs., had to be dispatched from Port au Prince. On account of the rainy season the roads were impassable, and there was no aerodrome at Aux Cayes. The package was finally delivered by a D.H.4b biplane, piloted by 2nd Lieut. K. B. Collings, as follows:— 6 7 4 means visibility less than 4,000 yards. 5 i» .1 »» 5,000 ,, 6,000 ,, 7,000 ,, 8,000 above 8,000 If the figure o is enclosed in a square, thus ; O , it signifies that visibility is less than 200 yards. (c) Weather -•••"• ^^ Rain or drizzle. * Snow, hail or sleet. Thunderstorm or line-squall. Gale. (5) All signals will be white, the cloud signals representing the height of clouds above the respective aerodromes and not above sea level. (6) A typical signal would be :— ' _ . C2I % meaning that at Croydon the cloud was below 600 feet, the visibility was less than 1,000 yds., and it was raining. (7) The signals are situated approximately 30 yards east of the office of the Civil Aviation Traffic Officer, and 140 yds. west of the Compass Base. They are so placed as to appear the right way up to a pilot flying in a north-westerly direction. (8) Cancellation :—Notice to Airmen No. 24 of 1921 is cancelled, as from July 14, 1921. (No. 57 of 1921.) France : St. Inglevert Aerial Lighthouse : Prohibition of Photography 1. St. Inglevert Aerial Lighthouse THE aerial lighthouse, which was temporarily out of action, isiagain in operation, with increased hours of working. It is now lit each night from sunset to two hours after sunset. 2. Prohibition of Photography THE unauthorised use of photographic or cinemato- graphic apparatus on board aircraft by persons other than of French nationality is forbidden over the whole of French territory. In exceptional cases, permission to use photographic or cinematographic apparatus on board aircraft may be granted by the Director of the Service de la Navigation Aerienne, on request being made. Such permission, if granted, will be available over the whole of French territory, with the exception of the following areas :— (a) that portion of French territory situated east of a line running along the valley of the Meuse, the valley of the Moselle and the upper part of the Doubs as far as Switzerland. (b) the six fortified harbours of Cherbourg, Brest, Lorient, Rochefort, Toulon, and Bizerta (N. Africa) j and the towns of Dunkirk, Nice, Villefranche and Bonifacio (Corsica). 3. Previous Notices Notice to Airmen No. 122 of 1920 is hereby cancelled. Paragraph 1 of Notice to Airmen No. 98 of 1920 again becomes effective, with the amendment given in paragraph 1 above. (No. 59 of 1921.) Aerodromes for Civil Use : Amendments NOTICE to Airmen No. 56 of 1921 (Aerodromes for Civil Use : Consolidated List) is amended as follows :— LIST C. Licensed Civil Aerodromes. The following should be added : Wilmslow and Skegness. (No. 60 of 1921.) . ._ , The engine part was boxed, "and the box wrapped in canvas and securely fastened. A 30-ft. length of wire cable was attached, at the free end of which was secured an empty oil- can made watertight. The D.H. first dropped a message on the submarine chaser, stating that the package would be dropped, with attached buoy, just off shore. This was successfully accomplished, the package sinking in about 10 ft. of water, where it was easily salved. 512
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