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Aviation History
1928
1928 - 0270.PDF
APRIT, 12, 1928 where it is held in position by a pin through a small fitting. their sockets, and the plane is then free of the fuselage and The man on the wing tip now lowers this slightly, when can be carried away. The erecting of the wing is carried "*- ...... i ......,, . , out in the reverse sequence. Ailerons are fitted to the bottom plane only, and run the the second man releases the hook attachment to the cabane and the one half of the top plane is carried away. The process is repeated for the other half. The lower plane has, as we have said, quick-release attach- control attachments. whole span, chiefly in order to simplify the quick-release [" FLICHT " Copyright Sketches THE PARNALL " IMP " LIGHT AEROPLANE : Some Constructional Details. The engine plate is supported on a system of square tubes and angle sections, as shown in 1. The quick-release attachment of the aileron controls is shown in 2, while 3 illustrates the attachment of the interplane struts to lower plane. The same sketch also shows the general construction of the strut. The wing construction, consisting of false spars or stringers, and ribs or formers, with spruce planking, is indicated in 4, and the aileron and elevator construction in 5. merits to the fuselage at what would normally be thelocation of the rear spar. These are released first. When this has been done, the lower wing is prevented by a spring fromfalling down. The two persons catch, hold of a wing tip each, and press the wing backwards against the spring.After a backward movement of a little more than an inch the two pins in the front of the bottom plane come out of The fuselage is of orthodox construction, with a light skeleton of spruce, covered with ply-wood. It is, of course, flat-sided, and has a flat bottom, but a cambered deck fairing in the usual way. The top longerons are placed rather higher than in some machines, i.e., the deck fairing forms a smaller percentage of the overall fuselage depth, and Concluded on page 256) 242
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