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Pander E
The Pander E was the first indigenous Dutch training aircraft, used by clubs and also privately owned. A two-seat, single-engine biplane, 17 were built in the Netherlands from 1926 with engines of increasing power.
==Design and development==
Pander followed their first aircraft, the small, single-seat monoplane Pander D with a two-seat, low-powered biplane for club and training use. The Pander E was a true sesquiplane, with a lower wingspan exactly half that of the upper span; in plan, though not in detailed construction the lower wing was almost a half scale copy of the upper wing, the two maximum chords being in the ratio of 0.52 and the area ratio 0.23. The wings were entirely of wooden construction, apart from part of their covering. The upper plane was built around two box spars with spruce flanges and plywood webs. From the leading edge to behind the forward spar the covering was three-ply, with fabric aft. There were ailerons only on this upper wing. The narrower lower wings were of similar construction but used only a single box spar, though this was extended into a larger D-box by ply skinning forward around the leading edge. The wings were arranged so that the rear spar of the upper one was vertically above the single lower wing spar and the aft member of the V-form interplane struts was correspondingly vertical, with the forward member reaching forward to the forward upper spar. These Vs leaned outwards, their base on the lower wing strengthened with a further single strut to the upper fuselage longeron. The upper wing, built in two pieces, was held high above the fuselage by four cabane struts to the front spar and two more to the aft; the wings were pin-jointed to them.〔
The fuselage of the early Pander Es was of mixed construction, the forward structure from welded steel tubes with aluminium sheet skinning and the rear wood-framed and plywood-covered.〔 From the seventh aircraft onward, the fuselage became an all-metal structure.〔 The fin and tailplane were wood framed and ply covered but the rudder and elevators had steel tube leading edges and sheet steel ribs. The open, tandem cockpits were fitted with dual control. The first Pander Es had a 45 hp (33 kW) Anzani 6-cylinder radial engine, cowled but with the cylinder heads exposed for cooling; later models used several different engines including members of the Walter NZ radial family engine as well as the de Havilland Gipsy inline. The fixed, conventional undercarriage was a steel tube structure with a single axle supported by V-form stuts on each side, one leg to the upper fuselage longeron and one to the lower, braced laterally by short struts to the lower centre fuselage.〔
The first Pander E flew on 18 February 1926.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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