Praga E-40

Last updated
Praga E-40
Walter Minor 4 a Praga E-40.1 (1937).jpg
RoleBasic trainer
National origin Czechoslovakia
Manufacturer ČKD-Praga
First flightc.1936
Number built1?

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

Contents

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. [1]

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. [1]

Operational history

There are no records of the E-40 entering production and it is possible that only the prototype, OK-EDA, [2] [3] was built.

Specifications

Data fromJane's All the World's Aircraft 1938. [1]

General characteristics

Performance

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References

  1. 1 2 3 Grey, C.G. (1972). Jane's All the World's Aircraft 1938. London: David & Charles. p. 95c. ISBN   0-7153-5734-4.
  2. "GoldenYears". Archived from the original on 2012-02-19. Retrieved 2010-02-27.
  3. "E-40 image" . Retrieved 2011-10-13.