avia.wikisort.org - Aeroplane

The Grigorovich I-Z was a fighter aircraft developed in the Soviet Union during the 1930s. Advances in aircraft survivability thanks to all-metal construction and self-sealing and inert gas-filled fuel tanks led to experimentation with large-caliber weapons to shoot them down. In Soviet Union, Leonid Kurchevsky developed a series of recoilless rifles in various calibers and in 1930 was decided to adapt the 76.2 mm (3 in) weapons for aircraft use.[1]

I-Z
Role	Fighter Type of aircraft
National origin	Soviet Union
Manufacturer	Grigorovich
First flight	1931
Primary user	Soviet Air Force
Number built	73

The result was a conventional strut-braced monoplane with fixed landing gear. A pair of Kurchevsky APK (APK - Aviatsionnaya Pushka Kurchevsky - aircraft cannon Kurchevsky) rifles were mounted under the wings outside the propeller arc and the rear fuselage and tail assembly were of reinforced metal construction to withstand the blast. A single small-caliber synchronized machine gun in the left fuselage was added to aid the pilot in aiming.[1]

Two prototypes were built, the first flying in mid-1931. The second strengthened I-Zbis flew at the beginning of the following year. These were followed by 21 examples ordered as evaluation aircraft and 50 production machines. By the time this last batch was being delivered, however, it was already apparent that the concept of a "single-shot" fighter was flawed and the I-Zs that had been built were relegated to various testing roles. One such role was as a parasite fighter in the Zveno project.[1]

Operators

 Soviet Union

• Soviet Air Force

Specifications (I-Z)

Data from Istoriia konstruktskii samoletov v SSSR do 1938[1]

General characteristics

• Crew: 1
• Length: 7.65 m (25 ft 1 in)
• Wingspan: 11.5 m (37 ft 9 in)
• Wing area: 19.5 m² (210 sq ft)
• Airfoil: Göttingen 436[2]
• Empty weight: 1,180 kg (2,601 lb)
• Gross weight: 1,648 kg (3,633 lb)
• Powerplant: 1 × Shvetsov M-22 9-cylinder air-cooled radial piston engine, 358 kW (480 hp)
• Propellers: 2-bladed fixed-pitch propeller

Performance

• Maximum speed: 259 km/h (161 mph, 140 kn)
• Range: 600 km (370 mi, 320 nmi)
• Service ceiling: 7,000 m (23,000 ft)
• Time to altitude: 5,000 m (16,404 ft) in 14 minutes
• Wing loading: 85 kg/m² (17 lb/sq ft)
• Power/mass: 0.217 kW/kg (0.132 hp/lb)
  
• Horizontal turn time: 17 seconds

Armament

• Guns:
  

• 1×7.62 mm (0.3 in) PV-1 machine gun
• 2×76.2 mm (3 in) single-shot Kurchevsky APK recoilless rifles

See also

Aircraft of comparable role, configuration, and era

• Tupolev I-12

Related lists

• List of Interwar military aircraft

References

Bibliography

• Lesnitchenko, Vladimir (November–December 1999). "Combat Composites: Soviet Use of 'Mother-ships' to Carry Fighters, 1939–1941". Air Enthusiast (84): 4–21. ISSN 0143-5450.

Further reading

• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 441.
• World Aircraft Information Files. London: Bright Star Publishing. pp. File 895 Sheet 12.

На других языках

---

[de] Grigorowitsch I-Z

Grigorowitsch I-Z (russisch Григорович И–Ц) ist die Bezeichnung für ein sowjetisches einmotoriges Jagdflugzeug, das Mitte der 1930er Jahre eingesetzt wurde. Mit ihm wurden die Versuche mit der einschüssigen, rückstoßfreien Kanone von Leonid Wassiljewitsch Kurtschewski, die mit der Tupolew I-4 ihren Anfang genommen hatten, fortgesetzt.

---

- [en] Grigorovich I-Z

---

[it] Grigorovich I-Z

Il Grigorovich I-Z (in russo: Григорович И-Z?, traslitterato: Grigorovič I-Z), noto anche come I-ZET (in cirillico И-ЗЕТ) fu un aereo da caccia monomotore a ala bassa progettato dall'OKB 84 diretto da Dmitrij Pavlovič Grigorovič e sviluppato in Unione Sovietica negli anni trenta.

---

[ru] И-Z

И-Z (И-ЗЕТ) — советский истребитель спроектированный конструктором Д. П. Григоровичем специально для использования динамореактивных («безоткатных») орудий — авиационных пушек Курчевского АПК-4 калибра 76,2 мм. Строился серийно в 1933—1935 годах. Всего был выпущен 71 экземпляр. Из-за недоведенности вооружения и собственной «переходной» схемы так и не достиг боеготового состояния, но на его основе был разработан более совершенный истребитель ИП-1.

---

---