Tumansky R-15

R-15
Type	Turbojet
Manufacturer	Tumansky
Major applications	Mikoyan-Gurevich MiG-25 Tupolev Tu-123

The Tumansky R-15 is an axial flow, single shaft turbojet with an afterburner. Its best known use is on the Mikoyan-Gurevich MiG-25.

Design and development

The R-15-300 was designed at OKB-300 design bureau led by Sergei Tumansky in the late 1950s. The engine was originally designed to be used in the Tupolev Tu-121 high-altitude high-speed cruise missile. Due to lacking Soviet resources and funding the engine casing was mainly steel, and in areas exposed to high levels of heat, 30 micrometre silver-plated steel. At the time, the USSR did not have the resources to exploit metals such as titanium, or other composite alloys, which could have greatly reduced the engine's weight. The Tu-121 effort was later canceled, but its basic design was re-used to create the Tupolev Tu-123 reconnaissance drone.

Performance

At dry thrust the engine could produce 7,500 kilograms force (73.5 kN, 16,500 lbf); with afterburner the output is 11,200 kilograms force (110 kN, 24,700 lbf). This allowed speeds of up to mach 3.2 in the Mikoyan-Gurevich MiG-25 (which used two engines). The engine had very high fuel consumption, especially at low altitudes.

Variants

R-15-300 : Original version. Used in Tupolev Tu-123 Yastreb drone.
R-15-300M :
R-15B-300 : Electronic engine controls (the first for the Soviet engine). and modifications to increase life span. Original engine for the MiG-25P, MiG-25R and variants. Life expectancy 150 hours.
R-15BD-300 : Improved and more powerful version for MiG-25PD and MiG-25PDS. Life expectancy increased to 1000 hours.
R-15BF2-300 : Uprated version. Used in Ye-266M high-performance MiG-25M prototype. MiG-25M aircraft was never put into production

Applications

Specifications (R-15B-300)

General characteristics

Type: Afterburning turbojet
Length: 6,264 mm (246.6 in)
Diameter: 1,512 mm (59.5 in)
Dry weight: 2,454 kg (5,410 lb)

Components

Compressor: 5-stage axial compressor
Turbine: single-stage turbine
Fuel type: jp 56-77 120-140% octane shell
Oil system: type 67 grade

Performance

Maximum thrust:
73.5 kN (16,523 lbf) military power
100.1 kN (22,503 lbf) with afterburner
Overall pressure ratio: 4.75:1
Turbine inlet temperature: 942 °C (1,727 °F)
Specific fuel consumption:
127 kg/[h·kN] (1.25 lb/[h·lbf]) at idle
275 kg/[h·kN] (2.70 lb/[h·lbf]) with afterburner
Power-to-weight ratio:

References

External links

R-15 on LeteckeMotory.cz (cs)
R-15 on Airwar.ru (ru)

Tumansky aircraft engines

Piston engines	M-85 M-86 M-87 M-88 M-90

Gas turbines	RD-9 RD-10 R-11 R-13 R-15 R-21 R-25 R-29

Russian and former Soviet military designation sequences for radar, missile and rocket systems

Radar
systems

Land-based	A-100 P-3 P-8 P-10 P-12 P-14 P-15 P-18 P-19 P-20 P-30 P-35 P-37 P-40 P-70 P-80 P-100 Kabina 66 Kasta 2E RSN-225 Azov SNR-75 1S91 30N6 36D6 64N6 76N6 96L6E 9S15 9S19 9S32 Duga Dnestr Dnepr Daryal Dunay Volga Don 2N Voronezh Container

Ship-borne

Airborne	N001 N002 N005 N006 N007 N008 N010 N011 N012 N014 N019 N025 N035 N036

Missiles

ICBM	GR-1 R-7 R-9 R-16 R-26 R-36 R-36M R-46 RS-24 RS-26 RT-2 RT-2PM RT-2PM2 RT-20 RT-21 RT-23 RS-28 UR-100 UR-100MR UR-100N UR-200

IRBM	R-14 RSD-10

MRBM	R-5 R-12 RT-15 RT-25

SRBM	2K1 2K6 9K52 9K720 R-1 R-2 R-11 R-11A R-17 OTR-21 OTR-23 TR-1

SLBM	R-13 R-15 R-21 R-27 R-29 R-39 RSM-45 RSM-56

Surface-to-surface (cruise)	Burya RSS-40

Surface-to-surface (naval)	P-1 P-5 P-15 P-70 P-120 P-270 P-500 P-700 P-750 P-800 P-900 P-900A P-1000 RKV-500A RPK-2 RPK-6 RPK-7 URPK-3 URPK-4 URPK-5

Air-to-surface	KSR-2 KSR-5 KS-1 K-10S Kh-11 Kh-15 Kh-20 Kh-22 Kh-23 Kh-25 Kh-26 Kh-28 Kh-29 Kh-31 Kh-35 Kh-38 Kh-41 Kh-55 Kh-58 Kh-59 Kh-80 Kh-90 9M114V

Air-to-air	K-5 R-3 R-4 R-8 R-23 R-27 R-33 R-37 R-38 R-40 R-60 R-73 R-77 R-172

Anti-tank	3M6 9K111 9K112 9K114 9K115 9K115-2 9K121 9M14 9M15 9M17 9M113 9M117 9M119 9M120 9M123 9M133 Kornet-D Hermes

Unguided
rockets

Air-launched	RP-1 RP-5 RP-6 RP-9 RP-15 RP-21 RS-82 RS-132

Surface-launched	BM-14 BM-21 BM-24 BM-25 BM-27 BM-30 TOS-1

Engines

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