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YF-20
A YF-20K engine
Country of origin China First flight 1995-06-01 Designer Academy of Aerospace Liquid Propulsion Technology Associated LV Feng Bao 1 , Long March 2 , Long March 3 and Long March 4 Status In Production Propellant N 2 O 4 UDMH Cycle Gas Generator Chamber 1 Nozzle ratio 12.69 Thrust, vacuum 816.3 kN (183,500 lbf) Thrust, sea-level 731.5 kN (164,400 lbf) Chamber pressure 7.1 MPa (1,030 psi) Specific impulse , vacuum289 seconds (2.83 km/s) Specific impulse , sea-level259 seconds (2.54 km/s) Burn time 160s Gimbal range ±10° (when integrated on the YF-21B) Diameter 84 centimetres (33 in ) Dry mass 712.5 kg (1,571 lb ) Feng Bao 1 first stage and Long March 2C , Long March 2D , Long March 2E , Long March 3 , Long March 3A , Long March 3B and Long March 4A , boosters, first stage and second stage.References [1] [2] [3] [4]
The YF-20 is a Chinese liquid-fuel rocket engine burning N 2 O 4 UDMH in a gas generator cycle. It is a basic engine which when mounted in a four engine module forms the YF-21 . The high altitude variation is known as the YF-22 is normally paired with the YF-23 vernier to form the YF-24 propulsion module for second stages. New versions when used individually for booster applications are called YF-25 .[5] [6]
Versions
[ edit ]
The basic engine has been used since the Feng Bao 1 rocket and has been the main propulsion of the Long March 2 , Long March 3 and Long March 4 families.[6] [7] [8]
YF-20 : Core engine. Flown originally on the Feng Bao 1 and Long March 2A .[8] [9] [10]
YF-20A : Core engine.[11]
YF-20B (a.k.a. DaFY5-1 ): Core engine, also used on the boosters.[2] [12] [13]
YF-20C : Core engine, also used on the boosters.
YF-20D : Core engine, also used on the boosters.
YF-20E : Core engine, also used on the boosters.
YF-22 : Upper stage version with enlarged nozzle are ratio. Flown originally on the Feng Bao 1 second stage with no verniers, and on the Long March 2A with the YF-23 verniers as the YF-24 .[8] [10]
YF-22A : Upper stage version.
YF-22B (a.k.a. DaFY20-1 ): Upper stage version.[12] [13]
YF-22C : Upper stage version.
YF-22D : Upper stage version.
YF-22E : Upper stage version.
YF-25 : Booster stage version.
Modules
[ edit ] A YF-24B engine
While the basic engine was used multiple times, it was only used as a single engine for booster application. It is usually bundled into modules of multiple engines.[10] [14] [15]
The relevant modules for first stage application are:
YF-21 : A module comprising four YF-20. Flown originally on the Feng Bao 1 and Long March 2A .[8] [10]
YF-21A : A module comprising four YF-20A. Improved version.
YF-21B (a.k.a. DaFY6-2 ): A module comprising four YF-20B. Improved version which increased thrust by 7%.[12]
YF-21C : A module comprising four YF-20C. Improved version.[16]
YF-21D : A module comprising four YF-20D. Improved version.
YF-21E : A module comprising four YF-20E. Improved version.
The relevant modules for second stage application are:
YF-24 : A module comprising an YF-22 and a YF-23 vernier. First flown on the Long March 2A .[10]
YF-24A : A module comprising an YF-22A and a YF-23A verniers.
YF-24B : A module comprising an YF-22B and a YF-23B verniers.
YF-24C : A module comprising an YF-22C and a YF-23C verniers.
YF-24D : A module comprising an YF-22D and a YF-23D verniers.
YF-24E : A module comprising an YF-22E and a YF-23E verniers.[16]
References
[ edit ]
^ "Long March" . Rocket and Space Technology. Retrieved 2015-07-08 .
^ a b "YF-20B" . Encyclopedia Astronautica. Archived from the original on 2015-08-24. Retrieved 2015-07-15 .
^ Sutton, George Paul (November 2005). "Liquid Rocket Propellant Engines in the People's Republic of China" . History of Liquid Propellant Rocket Engines . AIAA . p. 873. ISBN 978-1563476495 . Retrieved 2015-07-15 .
^ Mowthorpe, Matthew (2004). "Chinas Military Space Program" . The Militarization and Weaponization of Space . Lexington Books. p. 90. ISBN 978-0739107133 . Retrieved 2015-07-15 .
^ Harvey, Brian (2004). "Launch Centers Rockets and Engines" . China's Space Program — From Conception to Manned Spaceflight . Springer Science & Business Media. p. 231. ISBN 978-1852335663 . Retrieved 2015-07-15 .
^ a b Norbert Bgügge. "Asian space-rocket liquid-propellant engines" . B14643.DE . Archived from the original on 2015-07-17. Retrieved 2015-07-15 .
^ Norbert Bgügge. "YF rocket engine history" . B14643.DE . Archived from the original on 2015-07-17. Retrieved 2015-07-15 .
^ a b c d Norbert Bgügge. "Propulsion FB-1" . B14643.DE . Retrieved 2015-07-15 .
^ "YF-20" . Encyclopedia Astronautica. Archived from the original on 2015-08-24. Retrieved 2015-07-15 .
^ a b c d e Norbert Bgügge. "Propulsion CZ-2, CZ-2C, CZ-2D" . B14643.DE . Retrieved 2015-07-15 .
^ "YF-20A" . Encyclopedia Astronautica. Archived from the original on 2015-08-24. Retrieved 2015-07-15 .
^ a b c "Chapter 2 — General Description to LM-3B". LM-3B User's Manual. Issue 1999 (PDF) . CASC . 1999. p. 2 . Retrieved 2015-07-08 .
^ a b "Chapter 2 — General Description to LM-2E". LM-2E User's Manual. Issue 1999 (PDF) . CASC . 1999. p. 2 . Retrieved 2015-07-08 .
^ Norbert Bgügge. "Propulsion CZ-3, CZ-3A CZ-3B, CZ-3C" . B14643.DE . Retrieved 2015-07-15 .
^ Norbert Bgügge. "Propulsion CZ-4A, CZ-4B, CZ-4C" . B14643.DE . Retrieved 2015-07-15 .
^ a b "2.3 LM-3B and LM-3BE Launch Vehicles". LM-3A Series Launch Vehicle User's Manual. Issue 2011 (PDF) . CASC . 2011. pp. 2–16. Retrieved 2015-07-08 .
t
e
Liquid
Cryogenic
Hydrolox LH 2 LOX )
China
Europe
India
Japan
Russia
USA
Methalox CH 4 LOX )
Semi-
Kerolox RP-1 / LOX )
China
India
Russia
NK-15
NK-33, 44
RD-58
RD-0105, 0109
RD-0107, 0108, 0110
RD-0110R
RD-0124
RD-107, 108, 117, 118
RD-120
RD-170, 171
RD-180
RD-191, 151, 181
RD-193
S1.5400
Spain
Ukraine
USA
Storable
Hypergolic (Aerozine , UH 25 , MMH , or UDMH N 2 O 4 MON , or HNO3 )
China
Europe
India
Israel
North Korea
Russia
17D61
RD-0202 to 0206, 0208 to 0213
RD-0207, 0214
RD-0216, 0217, 0235
RD-0233, 0234
RD-0236
RD-0237
RD-0243 to 0245
RD-0255 to 0257
RD-215 to 219
RD-250 to 252, 261, 262
RD-253, 275
RD-263, 268, 273
RD-270
S5.92
S5.98M
Ukraine
USA
Other
Solid
China
Europe
India
Iran
Israel
Japan
USA
* Different versions of the engine use different propellant combinations
Engines in italics are under development
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=YF-20&oldid=1167661200 " C a t e g o r i e s : ● R o c k e t e n g i n e s o f C h i n a ● R o c k e t e n g i n e s u s i n g h y p e r g o l i c p r o p e l l a n t ● R o c k e t e n g i n e s u s i n g t h e g a s - g e n e r a t o r c y c l e H i d d e n c a t e g o r i e s : ● A r t i c l e s w i t h s h o r t d e s c r i p t i o n ● S h o r t d e s c r i p t i o n i s d i f f e r e n t f r o m W i k i d a t a
● T h i s p a g e w a s l a s t e d i t e d o n 2 9 J u l y 2 0 2 3 , a t 0 3 : 4 7 ( U T C ) . ● T e x t i s a v a i l a b l e u n d e r t h e C r e a t i v e C o m m o n s A t t r i b u t i o n - S h a r e A l i k e L i c e n s e 4 . 0 ;
a d d i t i o n a l t e r m s m a y a p p l y . B y u s i n g t h i s s i t e , y o u a g r e e t o t h e T e r m s o f U s e a n d P r i v a c y P o l i c y . W i k i p e d i a ® i s a r e g i s t e r e d t r a d e m a r k o f t h e W i k i m e d i a F o u n d a t i o n , I n c . , a n o n - p r o f i t o r g a n i z a t i o n . ● P r i v a c y p o l i c y ● A b o u t W i k i p e d i a ● D i s c l a i m e r s ● C o n t a c t W i k i p e d i a ● C o d e o f C o n d u c t ● D e v e l o p e r s ● S t a t i s t i c s ● C o o k i e s t a t e m e n t ● M o b i l e v i e w
