RD-8

RD-8 (РД-8)
Liquid-fuel engine
Country of origin	USSR
Manufacturer	Yuzhnoye Design Bureau
Application	Upper stage vernier
Status	Operational
Propellant	LOX / rocket grade kerosene
Performance
Thrust (vac.)	78.5 kilonewtons (17,600 lbf)^[1]
Chamber pressure	7.8 megapascals (1,130 psi)^[1]
I_sp (vac.)	342 seconds (3.35 km/s)
Dimensions
Dry weight	380 kilograms (840 lb)
Used in
Zenit-2, Zenit-3SL upper stage

The RD-8 engine was developed by Yuzhnoye Design Bureau for the second stage of the Zenit rocket. It has four hinged chambers and a single turbopump unit. The fuel pair is LOX/kerosene. Vacuum thrust is 78.5 kN and its specific impulse in vacuum is 342 seconds (3.35 km/s).^[2]

The engine was designed for long service life (up to 4000 seconds), high reliability, and is the first smaller upper stage engine to use the staged combustion cycle.^[2]

References

Orbital launch vehicles flown rocket engines and rocket motors

Liquid fuel

Cryogenic

(LH₂/LOX)

US	J-2 RL10 RS-68 RS-25 (SSME)

EU	HM7B Vulcain

Russia	RD-0120 KVD-1 (RD-56)

Japan	LE-5 LE-7

China	YF-73 YF-75

India	CE-7.5 CE-20

Semi-cryogenic

(RP-1/LOX)

US	F-1 H-1 Kestrel LR-79 LR-89 LR-105 Merlin 1 RS-27 RS-27A RS-56 XLR50

EU	RZ2

Russia	NK-33 RD-0105 RD-0107 RD-0108 RD-0109 RD-0110 RD-0110R RD-0124 RD-107 RD-108 RD-117 RD-120 RD-170 RD-180 RD-191 RD-58 RD-8 S1.5400

China	YF-100 YF-115

Semi-cryogenic
(Other)

UDMH/LOX	RD-119

Hypergolic

Aerozine 50/N₂O₄	AJ10 Astris LR-87 LR-91 TR-201

UH 25/N₂O₄	Viking Vikas-2B/4B

UDMH/N₂O₄	RD-0202 RD-0203 RD-0204 RD-0205 RD-0206 RD-0207 RD-0208 RD-0209 RD-0210 RD-0211 RD-0212 RD-0213 RD-0214 RD-0216 RD-0217 RD-0233 RD-0234 RD-0235 RD-0236 RD-0237 RD-0243 RD-0244 RD-0245 RD-0255 RD-253 RD-263 RD-843 RD-869 17D61 S5.92 S5.98M YF-1 YF-3 YF-20 YF-21 YF-22 YF-23 YF-24 YF-25 YF-40 YF-50D Vikas LK-4

MMH/N₂O₄	Aestus PS4

RP-1/H₂O₂	Gamma YF-85

other	XLR81 RD-214

Solid fuel

US	Algol X-254 X-248 Castor 30 Star 37 Star 48 Orbus-6 Orbus-21 UA1205 USRM AJ-60A GEM Space Shuttle Solid Rocket Booster Inertial Upper Stage Orion

Japan	SRB-A M-34c KM-V2b M-14 M-24 M-34 KM-V1

EU	P80 Zefiro 9 Zefiro 23 Mage 1 PAP P230 Waxwing

India	S7 S9 S12 S139 S200

China	FG-02 FG-36 FG-46 FG-47 SpaB-65 SpaB-140C

Israel	LK-1 RSA-3

Related articles: Comparison of orbital rocket engines

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 SA-6 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 RSS-40 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	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)

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-5 KS-1 K-10S Kh-11 Kh-15 Kh-20 Kh-22 Kh-23 Kh-25 Kh-25MP Kh-26 Kh-28 Kh-29 Kh-31 Kh-35 Kh-41 Kh-55 Kh-58 Kh-59 Kh-59M Kh-80 Kh-90 9M114V

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

Anti-tank	9M15

Unguided
rockets

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

Surface-launched	BM-21 BM-27 BM-30 TOS-1

Engines

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