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Bisnovat SK-2 (Skorostnoye Krylo)


Single-Seat, Single-Engine Fighter Prototype (1940)


Aviation / Aerospace

1 / 1
Image from the Public Domain.

Jump-to: Specifications

The Bisnovat SK-2 was seemingly too advanced for its own good and, despite promising performance gains, was not adopted for serial production during World War 2.



Authored By: Staff Writer | Last Edited: 01/31/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.
Like other powers of the late-Interwar period (that is, the period between the two World Wars), the Soviets were hard at work on development of all-new monoplane wing planforms to improve their lot of frontline machine gun-armed fighters. The Central Dynamics and Hydrodynamics Institute (TsAGI), under the direction of Matus Bisnovat, had conducted research in the field involving the SK/SK-1 ("Skorostnoye Krylo") high-speed monoplane-winged speedster of 1939-1940 and this work was used to progress a combat-level fighting monoplane bearing his name - the Bisnovat "SK-2". Bisnovat had already accrued the needed knowledge while working as an aeronautics engineer at OKO in Kiev, Ukraine, and was eventually allowed to establish his own design bureau ("OKB") for extending the project.

Like the original SK, the SK-2 sought to accomplish complete refinement in design, not only utilizing an all-new, small-area wing planform but also securing the smallest, most efficient airframe to viably accommodate an inline piston engine of the day. The aircraft featured the Klimov M-105 (VK-105) 12-cylinder inline piston engine of 1,050 horsepower driving a three-bladed propeller at the nose - the engine housed in a compact, low-profile space to maintain the aircraft's streamlined efficiency. The pilot's position was held low against the fuselage and positioned well-aft in the design, the dorsal spine meeting the base of the single rudder tail fin. The "tail-dragger" undercarriage was hydraulically controlled and wholly-retractable. The mainplanes, with their rounded tips, straight leading edges, and tapering trailing edges, were fitted low and ahead of midships creating a balanced flying platform. All-metal construction, including light alloy skinning, was used throughout the makeup of the aircraft though fabric covered the tail's control surfaces.

In its potential combat form, it was proposed that the aircraft would carry an armament array of at least 2 x 12.7mm BS Heavy Machine Guns (HMGs) in the engine cowling and possibly 1 x 7.62mm Medium Machine Gun (MMG) to improve firepower in meeting the threats of the day.

As finalized, the SK-2 was first-flown during October 1940 (this as World War 2 raged on) and gave itself a good showing. However, the gains found through this advanced design were not enough to supplant the current mold of fighter design in the Soviet aircraft stable. As such, the Sk-2 project was abandoned as the war continued.

Captured performance specs for the SK-2 fighter design included a top speed of 413 miles-per-hour and a rate-of-climb of 3,785 feet-per-minute - excellent qualities for a fighter of the early-war period.

Specifications



Service Year
1940

Origin
Soviet Union national flag graphic
Soviet Union

Status
CANCELLED
Development Ended.
Crew
1

Production
1
UNITS


Bisnovat OKB - Soviet Union
National flag of the Soviet Union Soviet Union (cancelled)
(OPERATORS list includes past, present, and future operators when applicable)
Air-to-Air Combat, Fighter
General ability to actively engage other aircraft of similar form and function, typically through guns, missiles, and/or aerial rockets.
Interception
Ability to intercept inbound aerial threats by way of high-performance, typically speed and rate-of-climb.
X-Plane (Developmental, Prototype, Technology Demonstrator)
Aircraft developed for the role of prototyping, technology demonstration, or research / data collection.


Length
27.2 ft
(8.28 m)
Width/Span
24.0 ft
(7.30 m)
Height
10.7 ft
(3.25 m)
Empty Wgt
4,079 lb
(1,850 kg)
MTOW
5,071 lb
(2,300 kg)
Wgt Diff
+992 lb
(+450 kg)
(Showcased structural values pertain to the Bisnovat SK-2 production variant)
Installed: 1 x Klimov M-105 (VK-105) 12-cylinder, liquid-cooled inline piston engine developing 1,050 horsepower and driving a three-bladed propeller unit at the nose.
Max Speed
410 mph
(660 kph | 356 kts)
Ceiling
36,089 ft
(11,000 m | 7 mi)
Range
404 mi
(650 km | 1,204 nm)
Rate-of-Climb
3,785 ft/min
(1,154 m/min)


♦ MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030


(Showcased performance specifications pertain to the Bisnovat SK-2 production variant. Compare this aircraft entry against any other in our database. View aircraft by powerplant type)
PROPOSED:
2 x 12.7mm BS Heavy Machine Guns (HMGs) in engine cowling.
1 x 7.62mm Medium Machine Gun (MMG).


Supported Types


Graphical image of an aircraft medium machine gun
Graphical image of an aircraft heavy machine gun


(Not all ordnance types may be represented in the showcase above)
Hardpoint Mountings: 0


SK-2 - Base Series Designation; single flyable example completed.


General Assessment
Firepower  
Performance  
Survivability  
Versatility  
Impact  


Values are derrived from a variety of categories related to the design, overall function, and historical influence of this aircraft in aviation history.
Overall Rating
The overall rating takes into account over 60 individual factors related to this aircraft entry.
52
Rating is out of a possible 100 points.
Relative Maximum Speed
Hi: 500mph
Lo: 250mph
This entry's maximum listed speed (410mph).

Graph average of 375 miles-per-hour.
City-to-City Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Bisnovat SK-2 operational range when compared to distances between major cities (in KM).
Max Altitude Visualization
Small airplane graphic
Design Balance
The 3 qualities we look at for a balanced aircraft design are altitude, speed, and range.
Aviation Era Span
Pie graph section
Showcasing era cross-over of this aircraft design.
Unit Production (1)
1
36183
44000
This entry's total production compared against the most-produced military and civilian aircraft types in history (Ilyushin IL-2 and Cessna 172, respectively).
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