Grigorovich IP-1

__NOTOC__ Infobox Aircraft
name=IP-1, IP-4


caption=
type=Fighter
national origin=Soviet Union
manufacturer=Grigorovich
designer=
first flight=avyear|1935
introduced=
retired=
status=
primary user=Soviet Air Force
more users=
produced=
number built=ca. 90
variants with their own articles=The Grigorovich IP-1 (for Истребитель Пушечный - "Cannon fighter") was a fighter aircraft produced in the Soviet Union in the 1930s. When the performance of both the Grigorovich I-Z and its single-shot Kurchevski DRP cannon armament proved disappointing, the development of that particular system did not halt development of the basic underlying concept of a cannon-armed bomber destroyer. Leonid Kurchevski developed a new, 75 mm cannon designated the Kurchevski APK-4 which could fire five shots instead of just one, and once again the Grigorovich design bureau created an aircraft to carry it. The IP-1 was a conventional, low-wing cantilever monoplane with retractable tailskid undercarriage and an open cockpit. Construction throughout was all-metal, and like it predecessor, its horizontal stabiliser was mounted high to avoid gasses from the underwing cannons. Once again, however, trials proved the concept a failure.

Nevertheless, the IP-1 was ordered into production, with a modified version that dispensed with the cannon and instead carried a 20 mm autocannon and three 7.62 mm machine guns in and under each wing. Some 90 of these were supplied to the Soviet Air Force in 1936 and 1937, but were outclassed and overshadowed by the Polikarpov I-16.

A final development was the IP-4 prototype, which was armed with four 45 mm Kurchevski APK-11 cannon, but this was no more successful than any of the other Kurchevski-armed types, and a second prototype was abandoned before it was completed.

Operators

;USSR
*Soviet Air Force

pecifications (IP-1)

aerospecs
ref=
met or eng?= met

crew=One pilot
capacity=
length m=7.23
length ft=23
length in=9
span m=10.97
span ft=36
span in=0
swept m=
swept ft=
swept in=
rot number=
rot dia m=
rot dia ft=
rot dia in=
dia m=
dia ft=
dia in=
width m=
width ft=
width in=
height m=
height ft=
height in=
wing area sqm=20.0
wing area sqft=215
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio=
empty weight kg=1,200
empty weight lb=2,646
gross weight kg=1,880
gross weight lb=4,145
lift kg=
lift lb=

eng1 number=1
eng1 type=Shvetsov M-25
eng1 kw= 530
eng1 hp= 710
eng1 kn=
eng1 lbf=
eng1 kn-ab=
eng1 lbf-ab=
eng2 number=
eng2 type=
eng2 kw=
eng2 hp=
eng2 kn=
eng2 lbf=
eng2 kn-ab=
eng2 lbf-ab=

max speed kmh=410
max speed mph=255
max speed mach=
cruise speed kmh=
cruise speed mph=
range km=600
range miles=373
endurance h=
endurance min=
ceiling m=8,300
ceiling ft=27,230
glide ratio=
climb rate ms=12.8
climb rate ftmin=2,520
sink rate ms=
sink rate ftmin=

armament1=2 × fixed, forward-firing 7.62 mm ShKAS machine guns in forward fuselage
armament2=2 × fixed, forward-firing 20 mm ShVAK cannons in wing roots
armament3=6 × fixed, forward-firing 7.62 mm ShKAS machine guns in in trays under wings
armament4=
armament5=
armament6=

aircontent
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related=
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References

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