“Praga E-40”的意思、由来-开放百科全书

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Praga E-40

释义

Design and development
Operational history
Specifications
References

name=Praga E-40

image=Walter Minor 4 a Praga E-40.1 (1937).jpg

caption=

}}{{Infobox aircraft type

type=Basic trainer

national origin=Czechoslovakia

manufacturer= ČKD-Praga

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first flight=c.1936

introduced=

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produced=

number built=1?

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The Praga E-40 was a single engine, two seat, biplane basic trainer, built in Czechoslovakia in the mid-1930s.

Design and development

The E-40, one of several Praga trainer designs, was a single-bay biplane with open, tandem cockpits. The swept wings had twin wooden spars and a mixture of plywood and fabric covering. Ailerons were fitted to the lower wing and the upper wing had a cut-out on its trailing edge to enhance visibility from the forward cockpit. The N-form interplane struts were steel and the bay braced with streamlined wires. A pair of vertical N-form struts joined the wing centre section to the upper fuselage. The fixed tail surfaces were wood framed and plywood covered; the tailplane was strut braced from below. Elevators and rudder were fabric covered over steel frames. The rudder had a trim tab.

The fuselage of the E-40 was a steel structure, rigidly braced at the front and wire braced aft. The nose and the upper decking were covered with detachable steel panels; fabric covering was used elsewhere. Fuel and engine oil tanks were in the fuselage. The E-40 was powered by a four-cylinder 63/71 kW (85/95 hp) Walter Minor air-cooled, inverted piston engine driving a two-blade propeller. It had a split type main undercarriage with wheels on V-form legs mounted just forward of the wing leading edge. Rubber-in-compression spring units were mounted in extended hubs; the pistons of these units were held in place on a shallow, inverted V strut, itself attached to the lower fuselage via a steel tube pyramid. The tailwheel castored and had rubber springing within the rear fuselage.

Operational history

There are no records of the E-40 entering production and it is possible that only the prototype, OK-EDA,^[3]^[4] was built.

Specifications

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|max speed kmh=165
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|time to altitude=16 min to 2,000 m (6,560 ft)
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References

1. ^¹{{cite web|url=http://www.goldenyears.ukf.net/|title=GoldenYears|author=|date=|work=|publisher=|accessdate=2010-02-27|deadurl=yes|archiveurl=https://web.archive.org/web/20120219070818/http://www.goldenyears.ukf.net/|archivedate=2012-02-19|df=}}
2. ^¹{{cite web |url=http://forum.valka.cz/viewtopic.php/t/8825 |title=E-40 image |author= |date= |work= |publisher= |accessdate=2011-10-13}}

^[1]^[2]
}}{{Praga aircraft}}

5 : Czechoslovakian aircraft 1930–1939|Praga aircraft|Single-engined tractor aircraft|Biplanes|Aircraft first flown in 1936

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