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Aviation History
1926
1926 - 0830.PDF
NOVEMBER 11, 1926 EJ E 0 13 H 13 H El 13 13 13 13 H 13 13 H 13 H H H H H The "Eagle " Aerial Camera : An example of an Oblique photo- graph taken with the "Eagle " Electric camera. Recorded on the right of each exposure made is such informa- tion necessary in the making of air maps—time, altitude, inclina- tion, etc. 13 H 13 H the automatic period, it is only necesszry to push thebutton " D " when the dial " E " indicates that the shutter is set. The fourth dial " F " indicates the total number ofexposures made with each magazine, while a small red lamp " G " automatically flashes a signal five seconds before anexposure is made, thus enabling the pilot to keep the machine steady at the moment of exposure. Power for the operation of the camera is obtained froman electric motor, " I," driven from a 12-volt supply source, and driving the camera gear-box through a detachable flexibledrive. As a protective measure a friction clutch is inserted between the armature spindle and the driving dog for theflexible shaft, which is so adjusted as to transmit sufficient power to drive the camera under normal conditions, but willslip in the event of a jamb in the magazine gear-box. The gear-box is an aluminium casting attached by meansof a hinge and thumb-screw to the side of the camera body. It contains the various mechanical and electrical devices forchanging the film, setting the shutter, controlling the counters, set-indicator and motor, and also carries the turning handlefor manual operation. Should the electric current fail, or not be available, analternative power device is provided. This consists of a " windmill " " J " in the slipstream of the airscrew, whichtakes the place of the electric motor. In this case the camera is semi-automatic, the exposures being made by hand,using the Bowden control " H." The " windmill " is thrown out of action, when not in use, by the lever " K." If required, the camera can be entirely operated by hand,in which case it is necessary to turn the handle provided for this purpose on the gear-box. The instruments for recording the various data on the negative are contained in a box, forming a complete andseparate unit, which can be removed through a door in the side of the camera body. It contains the following:—Veeder Counter, aneroid, two-way spirit level, thirty-hour watch, Ivorine tablet, on which may be recorded cameranumber, focal length, date, etc., etc. A small 1-in. f/3-5 lens is mounted above each instrument, which is illuminated,for recording the image on the film. We note, however, that while most of the information likely to be of assistancefor surveying or map-making is thus recorded on each photo- graph, there is no provision for indicating the points of thecompass—an item which is not, perhaps, absolutely necessary, but which should certainly be useful. Of course, in some casesthe shadows cast on the ground, taken in conjunction with the time, would afford sufficient indication of the direction of" north." The method of supporting the camera in the aeroplane isworthy of special note. Various adjustments are provided, so that the camera may be set at any desired angle to correctthe changing position of the aeroplane to the horizontal while the camera may be rotated in its supports to allow fordrift. The weight of the " Eagle " camera, complete with coneand lens, varies from 41 1b. to 51 lb., according to the size of lens fitted, while the other components weigh about 40 lb. ;spare magazines, with 100-exposure film, weigh 14 lb. each. The price of this camera is, we understand, -£350. A number of these cameras are already in use by the RoyalAir Force (known as the Service Type F/8), and the Aircraft Operating Co. used the actual camera demonstrated lastweek on the revision work which they carried out for the Ordnance. Survey. ROSEMARY, daughter of Mr. and Mrs. SEALY-ALLIN, Rhodesia(late of Youghal, Co. Cork), and granddaughter of the late Col. T. Goddard, of Colne, Wilts Item PERSONALS MarriedThe marriage of Mr. J. E. L. HUNTER (late R.N.A.S.),only son of Mr. and Mrs. E. L. Hunter, of Shanghai, and Mrs. GWENDOLEN MARY CLEATON MULOCK, only daughterof the late Mr. and Mrs. Cleaton, took place quietly in London on November 6. ™ ... , ,, ,,„,.,I he will of the late Flight-Lieut. REGINALD CAREY BRENTON BRADING, R.A.F., D.F.C., of Outram Road, Croydon, whobrought down 32 enemy aeroplanes during the war, and who was killed in an aeroplane accident near Baghdad onJuly 26, has been proved at £8,809. __ 738 To be MarriedThe engagement is announced between Maj. EUAN J. L. W. GILCHRIST, M.C., D.F.C., of Salisbury, Rhodesia, son of Mr.and Mrs. William Gilchrist, of St James, South Africa, and
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