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Aviation History
1921
1921 - 0093.PDF
FEBRUARY IO, 1921 SOME NEW NAPIER "LION" NECESSITIES AND "THE CUB ONE of the demands of the Air Ministry is that all the controls of an aero-engine must come aft (or forward according to the installation, for pusher or tractor), but anyway to a single- point . Already in the older " Lions,'' the cable from the single lever of the interconnected-camshaft-sliding-gear-for-valve rises, having upon it two lever arms. From one of these two, ball-jointed rodwork goes to the throttle control of the duplex and single Claudel carburettors fitted to the "Lion." This lever, too, has a short bell-crank arm from which, by way of a tiny universal joint, a short rodwork connection goes at HHHEI HBHH Certain new accessory details on the Napier "Lion," such as the armouring of the ignition cables with material that earths the in- duced currents due to the ex- treme high volt- age, to prevent interference with directional wire- less currents arriving to the aeroplane ; the brass distributor shielding for the same purpose, and the cut-out cock in the re- turn lead to the pump from the carburettor water - jacketing for flight in tropical climates. H H H H H H a 13 m H 0 H 13 H H El 13 13 13 BEBBBBSB relief—they say these things better in German—and the new toggle-action-engaged hand-starting gear, were so located ; but the others, not entirely. The latest modi- fication, therefore, is the installation of a little stub-spindle from the column of which the middle valve gear drive-shaft right angles and diagonally downward to the advance and retard lever of the port-side magneto, which of course has its direct rod connection to the lever of the starboard one. Consequently the movement of the throttle control advances or retards both magnetos, and let it be said, in a much better 13 13 H H B m m 13 13 H 13 13 13 m 13 13 13 13 13 H a 13 Two views of the latest Napier "Lion" hand- starting gear, shown in the "on " position on the left, and "off" on the right, for the lever-actuated toggle - engaged clutch mechan- ism within, that frees itself into the off position as soon as the start is effected. 1 H H H H H H 93 c 2 •x
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