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Aviation History
1940
1940 - 1274.PDF
MAY 2, 1940 SpanLength, HeightTrack Wing area engine nacelles and undercarriage. There is a corru- gated inner surface, but the skin covering is smooth metal. Leading and trailing edges are made from sheet metal riveted and bolted to the main structure. The ailerons are of high aspect ratio; inboard of these are slotted camber-changing flaps. The fuselage is deep at its forward portion but has a characteristic sweep down to the tail. It is of oval __ section and has smooth stressed-skin covering. The cantilever monoplane tailplane has twin tins and rudders at its extremities, and is all metal except for the fabric-covered movable surfaces. There are trimming tabs in the elevator and rudders. Of simple design, the undercarriage retracts rearward into the nacelles, a small section of each wheel being left exposed. The tail wheel is not retract- able but it well faired. The engine nacelles are of fine stream- lined shape and extend for a consider- able distance aft of the trailing edge of the wing. The engines can be Hispano- Suiza l4Ab's or of the Gnome-Rhone 14 Mars type. The type 691 is fitted with the latter power plants. These, like the Hispanos, are small-diameter high-revving two- row 14 - cylinder radials, and are rated at 680 h.p. at 13,200ft. An in- genious type of cowling is em- ployed. This has only a small annu- lar opening behind the spinner for the cooling air, and is of long chord. Just forward of the ad- (Above) The latest-type bomber with Gnome-Rhone en-gines. Note the two machine guns. The .long pitot arm is, of course, only for test purposes.(Left) The proto- type equipped as afighter with two 20 mm. shell guns.The engines are Hispano-Suizas.
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