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Description: | Liquid overhead compass - aircraft. Attached to a wooden board with ACO0581.
Bowl: Brass painted black. Verge has a moveable, in azimuth, course indicator painted red. Set in overhead gimbals. Filler plug on side. Liquid highly discoloured making it impossible to see inside of bowl or card.
Card: Unsighted. Said to be graduated to 360 degrees with every 5 degrees being shown. N & S are shown by red and blue respectively and E & W by black points.
Needle: Unsighted.
Pivot: Unsighted.
O.A. Height 3.25" (8.3 cm)
From the ACO catalogue 'A French overhead compass for Aircraft. This differs from the preceding exhibit as regards the card which is a metal float with the graduations painted on its flat surface. This has an excess of buoyancy and floats up to its pivot, but whether the latter is on the float or on the bowl is not known. It is graduated to 360 (degrees), every 10 (degree) being shown. No lubber line is shown inside the bowl, a movable point with a white line on a red ground being the only pointer fitted. | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | liquid compasses overhead compasses | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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Type 6/18
CAMPBELL APERIODIC COMPASS PAT APPLd…
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