Technical data
Type I-207 'product 8' I-207 'product 9'
Function Fighter Prototype
Year Fall 1939 Spring 1941
Crew 1
Engine M-63 M-63 with gearbox
Power 930/1100hp
Length 6.35m 6.70m
Wingspan 7.0m
Wing area 18.0m2
Loaded weight 1850kg 2200kg
Wing Load (kg/m2) 103 122
Power load (kg/hp) 1.7 2.0
Speed at 0m 428km/h 460km/h
Speed at 4000m 486km/h 518km/h
Landing Speed 115km/h
Range n/a 640km
Ceiling n/a 10500m
Climb
5000m 4.6min 4.5min
Armament
Guns 4*7.62mm ShKAS
550rpg

I-207 N°3 and N°4 (products '8' and '9') by A.A.Borovkov and I.F.Florov

German
44k b/w I-207 (product '8') "History of aircraft construction in the USSR", Vol.2 p.66

Limited success of I-207 N°1 and N°2, (product '7') trials resulted in an obvious move - introduction of retractable undercarriage. This task was fulfilled by introduction of unusual technic, when gear was retracted vertically into the fuselage by special lever frame. Just a tiny fairing were added under the fuselage.

The '8' (ready at Fall 1939) was powered by same engine and propeller as the product '7'. Introduction of retractable undercarriage boosted the performance, allowing to add two 250kg bombs or external fuel tanks.

44k b/w I-207 (product '8'), courtesy of Sergey Andreev

Despite all gains in performance, product '8' could not satisfy demands of year 1940. It was used as a testbed (one of) for I.A.Merkulov's DM-4 ramjet boosters, installed under the lower wing (replacing the external fuel tanks). About 20 flights with firing ramjets were performed without an accident.

Final version of the I-207 (product '9') was finished in Spring 1941. M-63 engine was equipped with a gearbox and turned new 3-blade VISh (3.0m diameter). Cockpit was enclosed, with canopy opening sidewards. Trials cancelled on the War outbreak.

PredecessorsModifications

7211

I-207
product '7'
None

ReferencesLinks
  • "History of aircraft construction in the USSR", Vol.2 p.65;
  • I-207
  • I-207, Borovkov-Florov

  • Created November 25, 1998 Back to
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