Praga E-40
title: "Praga E-40" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["praga-aircraft", "1930s-czechoslovak-aircraft", "single-engined-tractor-aircraft", "biplanes", "aircraft-first-flown-in-1936"] topic_path: "arts/film" source: "https://en.wikipedia.org/wiki/Praga_E-40" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::data[format=table title="Infobox aircraft"]
| Field | Value |
|---|---|
| name | Praga E-40 |
| image | Walter Minor 4 a Praga E-40.1 (1937).jpg |
| aircraft_type | Basic trainer |
| national_origin | Czechoslovakia |
| manufacturer | ČKD-Praga |
| number_built | 1? |
| first_flight | c.1936 |
| :: |
| name = Praga E-40 | logo = | logo_size = | image = Walter Minor 4 a Praga E-40.1 (1937).jpg | alt = | caption = | long_caption = | other_names = | aircraft_type = Basic trainer | aim = | outcome = | related = | national_origin = Czechoslovakia | manufacturer = ČKD-Praga | design_group = | designer = | builder = | issuer = | status = | owners = | primary_user = | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = 1? | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = | introduction = | retired = | first_flight = c.1936 | initiated = | in_service = | last_flight = | expected = | developed_from = | variants = | developed_into = | preservation = | fate = | predecessors = | successors = | concluded =
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, was built.
Specifications
|ref=Jane's All the World's Aircraft 1938. |prime units?=met General characteristics
|genhide=
|crew=2 |length m=8.15 |length note= |span m=9.0 |span note= |height m=2.85 |height note= |wing area sqm=20.6 |wing area note= |aspect ratio= |airfoil= |empty weight kg=470 |empty weight note= |gross weight kg=720 |gross weight note= |max takeoff weight kg= |max takeoff weight lb= |max takeoff weight note= |fuel capacity= |lift note= |more general= Powerplant
|eng1 number=1 |eng1 name=Walter Minor |eng1 type=4-cylinder inverted air-cooled |eng1 hp=85 |eng1 note= |power original= |more power=
|prop blade number=2 |prop name= |prop dia m= |prop dia ft= |prop dia in= |prop note=
Performance
|perfhide=
|max speed kmh=165 |max speed note= |max speed mach= |cruise speed kmh=135 |cruise speed note= |stall speed kmh= |stall speed mph= |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |range km=500 |range note= |endurance= |ceiling m=4000 |ceiling note= |g limits= |roll rate= |glide ratio= |climb rate ms= |climb rate ftmin= |climb rate note= |time to altitude=16 min to 2,000 m (6,560 ft) |lift to drag= |wing loading kg/m2= |wing loading lb/sqft= |wing loading note= |power/mass= |more performance= |avionics=
|see also= |related= |similar aircraft= |lists=
References
References
- Grey, C.G.. (1972). "Jane's All the World's Aircraft 1938". David & Charles.
- "GoldenYears".
- "E-40 image".
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