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I-4
Role Fighter
National origin Soviet Union
Manufacturer Tupolev
Designer Pavel Sukhoi
First flight 1927
Retired 1933
Primary user Soviet Air Force
Number built 369

The Tupolev I-4 was a Soviet sesquiplane single-seat fighter. It was designed in 1927 by Pavel Sukhoi, his first aircraft design, and the first Soviet all-metal fighter.

Design and development[]

After the first prototype (under the development name ANT-5), the I-4 was redesigned with a new engine cowling to decrease drag, added rocket launchers on the upper wing, and a larger tailfin. The lower wing was nothing more than an attachment for the wing struts; it was (almost) removed in the second series (I-4bis).

Operational history[]

The I-4 was used as a parasite fighter in experiments with the TB-3 bomber. The aircraft was in Soviet service from 1928–1933. A total of 369 were built.

Variants[]

  • ANT-5 : Prototype.
  • I-4 : Single-seat fighter aircraft.
  • I-4bis : Monoplane version.
  • I-4P : Floatplane version.

Operators[]

 Soviet Union

Specifications (I-4)[]

General characteristics

  • Crew: 1, pilot
  • Length: 7.27 m (23 ft 10 in)
  • Wingspan: 11.42 m (37 ft 5 in)
  • Height: 2.82 m (9 ft 2 in)
  • Wing area: 23.8 m² (256 ft²)
  • Empty weight: 978 kg (2,156 lb)
  • Loaded weight: 1,430 kg (3,153 lb)
  • Powerplant: 1 × M-22 (Bristol Jupiter) piston radial, 343 kW (460 hp)

Performance

  • Maximum speed: 257 km/h (160 mph)
  • Range: 840 km (524 mi)
  • Service ceiling: 7,655 m (25,100 ft)
  • Rate of climb: 555 m/min (1,820 ft/min)
  • Wing loading: 60 kg/m² (12 lb/ft²)
  • Power/mass: 0.25 kW/kg (0.15 hp/lb)

Armament

  • 2 × 7.62 mm machine guns
  • See also[]

    External links[]

    This page uses Creative Commons Licensed content from Wikipedia (view authors).

    The initial version of this article was based on material from aviation.ru. It has been released under the GFDL by the copyright holder.

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