Borovkov-Florov D

Development

The 'D' was designed as a mixed power fighter with a piston engine and Merkulin ramjet booster operating in the same duct. A 2,000 hp Shvetsov M-71 engine was intended to be the main powerplant but it is unclear how the thermodynamic cycles of the two engines were to be linked. Similar aircraft were built later in the German-Soviet War using the main engine to drive a propeller and a compressor to supply air to a ramjet/afterburner booster, both the Su-5 and MiG-13 were produced in limited numbers but the performance gains were limited and soon eclipsed by turbo-jet engines. The 'D' was to have been a gull-winged monoplane with high set wing, of stressed skin construction with exceptionally smooth skin stabilised by underlying corrugated structure. A heavy armament of two 37 mm Nudelman-Suranov NS-37 cannon and two 20 mm ShVAK cannon was included, but all work was abandoned with the German invasion of 1941.

Specifications

|prime units?=met General characteristics

|max takeoff weight kg= |max takeoff weight lb= |max takeoff weight note= Powerplant

|eng1 kn-ab= |eng1 lbf-ab=

|eng2 kn-ab= |eng2 lbf-ab=

|eng3 kn-ab= |eng3 lbf-ab=

Performance

|never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |minimum control speed kmh= |minimum control speed mph= |minimum control speed kts= |minimum control speed note= |wing loading kg/m2= |wing loading lb/sqft= |disk loading kg/m2= |disk loading lb/sqft= |fuel consumption kg/km= |fuel consumption lb/mi= |power/mass= |thrust/weight=

Armament

• 2x 37 mm Nudelman-Suranov NS-37 cannon
• 2x 20 mm ShVAK cannon

References

• Gunston, Bill. “The Osprey Encyclopaedia of Russian Aircraft 1875 – 1995”. London, Osprey. 1995.
• Taylor, Michael J.H. . “ Jane's Encyclopedia of Aviation. Studio Editions. London. 1989.

References

1. Gunston, Bill. (1995). "The Osprey Encyclopaedia of Russian Aircraft 1875–1995". Osprey Publishing.