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Chinese liquid rocket engine
The YF-40 is a Chinese liquid rocket engine burning N2O4 and UDMH in a gas generator cycle. It has dual gimbaling combustion chambers. Originally it was
YF-40
American prototype interceptor aircraft
The Lockheed YF-12 is an American Mach 3+ capable, high-altitude interceptor prototype, developed and manufactured by American aerospace company Lockheed
Lockheed_YF-12
Prototype fighter aircraft for the US military
The Northrop YF-17 (nicknamed "Cobra") is a prototype lightweight fighter aircraft designed by Northrop aviation for the United States Air Force's Lightweight
Northrop_YF-17
Prototype demonstrator aircraft for the US Air Force Advanced Tactical Fighter program
The Northrop–McDonnell Douglas YF-23 is an American single-seat, twin-engine, stealth fighter prototype technology demonstrator designed for the United
Northrop_YF-23
American stealth ground-attack aircraft
Stealth Fighter". America's Stealth Fighters and Bombers: B-2, F-117, YF-22 and YF-23. St. Paul, Minnesota, US: Motorbooks International. ISBN 978-0-87938-609-2
Lockheed_F-117_Nighthawk
Chinese space rocket
The proposed replacement was the Long March 4 third stage engine, the YF-40. A new inline inter-stage would replace the existing tapered connector between
Long_March_1D
USAF all-weather interceptor
The North American F-86D/K/L Sabre (initially known as the YF-95 and widely known informally as the "Sabre Dog") is an American transonic jet interceptor
North_American_F-86D_Sabre
American stealth air superiority fighter
training systems. First flown in 1997, the F-22 descended from the Lockheed YF-22 and was variously designated F-22 and F/A-22 before it formally entered
Lockheed_Martin_F-22_Raptor
American multi-role fighter aircraft
awarded contracts worth $37.9 million and $39.8 million to produce the YF-16 and YF-17, respectively, with the first flights of both prototypes planned for
General Dynamics F-16 Fighting Falcon
General_Dynamics_F-16_Fighting_Falcon
Chinese super-heavy rocket in development
designs have drawn comparisons to SpaceX Starship. The third stage may use YF-79 or YF-91 hydrolox engines. Current plans call for the Long March 9 to have
Long_March_9
U.S. Air Force stealth air superiority fighter program
phase. They would be the lead contractors to respectively develop the YF-22 and YF-23 technology demonstrator prototypes, the associated avionics prototypes
Advanced_Tactical_Fighter
Archived from the original on June 5, 2019. Retrieved January 20, 2020. "Zefiro 40 Motor Main Characteristics". Avio.com. Retrieved May 24, 2021. "Nova". Stoke
Comparison of orbital rocket engines
Comparison_of_orbital_rocket_engines
Chinese orbital launch vehicle
Diameter 2.9 m (9 ft 6 in) Propellant mass 14,000 kg (31,000 lb) Powered by 2 YF-40 Maximum thrust 100.85 kN (22,670 lbf) Specific impulse 2,971 m/s (9,750 ft/s)
Long_March_4B
Prototype fighter aircraft
The North American YF-93 was an American fighter development of the F-86 Sabre that emerged as a radically different variant that received its own designation
North_American_YF-93
American carrier-capable multirole strike aircraft
from the YF-17 that lost against the YF-16 in the United States Air Force's lightweight fighter program. The United States Navy selected the YF-17 for the
McDonnell Douglas F/A-18 Hornet
McDonnell_Douglas_F/A-18_Hornet
Series of all-weather interceptor aircraft
AMARC in December 1959. YF-94 TF-80Cs converted into YF-94 prototypes, two built. F-94A Initial production version, 109 built. YF-94B One F-94A modified
Lockheed_F-94_Starfire
American variable-cycle turbofan engine
the two competing technology demonstrator aircraft, the Lockheed YF-22 and Northrop YF-23. While the F120 design more ambitious due to its variable cycle
General_Electric_YF120
1956 prototype fighter aircraft
The designation "F-107A" was the only one assigned to the aircraft, though "YF-107A" is often used in publications. The aircraft is also informally called
North_American_F-107
China-based private equity firm
Yunfeng Capital (YF Capital; Chinese: 云锋基金; pinyin: Yúnfēng jījīn) is a Shanghai-based private equity firm founded in 2010. It was founded by Jack Ma (founder
Yunfeng_Capital
American low-bypass turbofan engine for the F-22 Raptor
engines for both the Lockheed/Boeing/General Dynamics YF-22 and the Northrop/McDonnell Douglas YF-23 ATF technology and flight demonstrators. The ATF's
Pratt_&_Whitney_F119
US Air Force supersonic aircraft, 1964–1998
aircraft, previously held by its predecessor, the closely related Lockheed YF-12. As of 2026[update], the Blackbird still holds both world records. In 1989
Lockheed_SR-71_Blackbird
Cold War interceptor of the US Air Force
carry both guided missiles and rockets. On 23 October 1953, the prototype YF-102 performed its maiden flight; however, it was destroyed in an accident
Convair_F-102_Delta_Dagger
1994 mecha anime OVA series
(YF-19 and YF-21) were simultaneously being tested for Project Super Nova in planet Eden. With the Ghost X-9 completed, testing on the YF-19 and YF-21
Macross_Plus
Family of US fighter aircraft
Original designation for the YF-93A, two built, 48–317 & 48–318, order for 118 cancelled, North American model NA-157 YF-95A Prototype all-weather interceptor
North_American_F-86_Sabre
High-altitude, supersonic reconnaissance aircraft
flew from 1963 to 1968. It was the precursor to the twin-seat U.S. Air Force YF-12 prototype interceptor, M-21 launcher for the D-21 drone, and the SR-71
Lockheed_A-12
Specific model of the F-16 fighter aircraft family
detailed below. Two single-seat YF-16 prototypes were built for the Light Weight Fighter (LWF) competition. The first YF-16 was rolled out at Fort Worth
General Dynamics F-16 Fighting Falcon variants
General_Dynamics_F-16_Fighting_Falcon_variants
Phoenix YF-112 YF-112C/D – Sukhoi (acquired former East German Su-22M4) YF-113 YF-113A – Mikoyan-Gurevich (captured MiG-17F under Have Drill) YF-113B –
List of United States Tri-Service aircraft designations
List_of_United_States_Tri-Service_aircraft_designations
American long-range air-to-air missile
interceptor aircraft and the XB-70, however after those jet's cancellation, the YF-12A (whose production was itself cancelled after only 3 vehicles) was armed
AIM-47_Falcon
Chinese medium-lift reusable carrier rocket
powered by nine YF-102R engines, is designed to be reused after stage-recovery via propulsive landing. The second stage is powered by a single YF-102RV engine
Long_March_12B
Chinese rocket engine
The YF-73 was China's first successful cryogenic liquid hydrogen fuel and liquid oxygen oxidizer gimballed engine. It was used on the Long March 3 H8 third
YF-73
1950 fighter-bomber aircraft
in the United States as the Wright J65. To accommodate the larger engine, YF-84Fs with a British-built Sapphire as well as production F-84Fs with the J65
Republic_F-84F_Thunderstreak
Chinese medium to heavy-lift launch vehicle
stages, and uses six YF-100 engines at launch, one each on four boosters and two on the core first stage; the second stage uses four YF-115 engines. The Long
Long_March_7
Chemical compound
is designated R-1234yf and marketed under the names Opteon YF by Chemours and as Solstice yf by Honeywell. R-1234yf is also a component of zeotropic refrigerant
2,3,3,3-Tetrafluoropropene
A covered lighter in service with the United States Navy during World War II
She was 132 feet (40 m) long and could carry cargo up to 250 tons. She operated in and around Boston, Massachusetts. On May 10, 1944, YF-415 sailed to the
USS_YF-415
US lightweight low-cost fighter aircraft
starting point for a series of design studies which resulted in the Northrop YF-17 and the F/A-18 naval fighter aircraft. The Northrop F-20 Tigershark was
Northrop_F-5
Soviet fighter-interceptor aircraft introduced in 1970
U.S. Air Force operated a small number of MiG-23s, officially designated YF-113, as both test and evaluation aircraft and in an aggressor role for fighter
Mikoyan-Gurevich_MiG-23
American prototype bomber aircraft
The North American NA-40 was an American prototype bomber aircraft developed by North American Aviation in the late 1930s for evaluation by the United
North_American_NA-40
Variants of the P-40 Warhawk
The Curtiss P-40 Warhawk was a WWII fighter aircraft that was developed from the P-36 Hawk, via the P-37. Many variants were built, some in large numbers
Curtiss_P-40_Warhawk_variants
US Air Force supersonic fighter-bomber
F-105s (two YF-105As, four YF-105Bs, six F-105Bs, and three RF-105Bs) under the Weapon System designation WS-306A. On 22 October 1955, the YF-105A prototype
Republic_F-105_Thunderchief
1956 fighter aircraft family by Lockheed
the XF-104 first flew in 1954. At the April 1956 public unveiling of the YF-104A, the engine inlets were obscured with metal covers. Visible weapons,
Lockheed_F-104_Starfighter
ex-YF-429 YCK-10, ex-YF-430 YCK-11, ex-YF-431 YCK-12, ex-YF-432 YCK-13, ex-YF-433 YCK-14, ex-YF-434 YCK-15, ex-YF-435 YCK-16, ex-YF-436 YCK-17, ex-YF-437
List of yard and district craft of the United States Navy
List_of_yard_and_district_craft_of_the_United_States_Navy
1970s American prototype turbojet aircraft engine
for the Northrop P-530 Cobra, but its initial application was the Northrop YF-17 entry in the Lightweight Fighter (LWF) competition. It was subsequently
General_Electric_YJ101
1953 fighter aircraft family
prototypes being ordered one year later following modifications. The first YF-100A performed its maiden flight on 25 May 1953, seven months ahead of schedule
North American F-100 Super Sabre
North_American_F-100_Super_Sabre
Soviet jet fighter aircraft family
parts supplied from Poland. YF-113B Covert designation of a captured MiG-17F used for the Have Drill flight testing program. YF-114C Covert designation of
Mikoyan-Gurevich_MiG-17
Vaccine that protects against yellow fever
Experts on immunization (SAGE) announced that a booster dose of yellow fever (YF) vaccine, ten years after a primary dose, is not necessary. Since yellow fever
Yellow_fever_vaccine
1943 tank landing ship of the US Navy
converted to a spare parts issue barge, and redesignated YF-1079. In early October 1945, YF-1079 was in Buckner Bay, when Typhoon Louise passed over.
USS_LST-39
American jet-powered all-weather interceptor aircraft
added 3 feet (0.91 m) to the length of the aircraft. It was redesignated YF-89A to reflect its role as a pre-production testbed to evaluate equipment
Northrop_F-89_Scorpion
American turbojet engine family
F9F-6/F9F-8 Cougar, The U.S. Air Force's Lockheed F-94C Starfire and North American YF-93 used afterburning versions of the J48 engine. Data from The Engines of
Pratt_&_Whitney_J48
American flying-wing bomber prototype
Drones Q-4 Fighters 3A XP-56 P-61 XP-79 F-89 XFT F2T F-5/CF-5/CF-116 YF-17 F-18L F-20 YF-23 Reconnaissance F-15 RF-61 RF-5 N-165 N-204 Trainers T-38 Transports
Northrop_YB-49
Soviet variable-sweep wing fighter-bomber
surfaces, albeit at half the power. The Nr 1 booster system feeds the GM-40 hydraulic motor driving the rotary parts of the wing. All hydraulic systems
Sukhoi_Su-17
YF-257-class of the United States Navy
USS YF-339 was an American YF-257-class covered lighter built in 1944 for service in World War II. She was later acquired by the United States Coast Guard
USCGC_White_Bush
Mid-size sedan produced by Hyundai
YF Sonata in 2005, with a development cost of ₩450 billion (US$372 million). In the Australian, New Zealand, Singapore, and Colombian markets, the YF
Hyundai_Sonata
White-class buoy tender of the United States Coast Guard
USS YF-445 was a U.S. Navy covered lighter built in 1943 for service in World War II. Her most significant action during the war was to supply ships with
USCGC_White_Heath
White-class buoy tender of the United States Coast Guard
USS YF-444 was an American YF-257-class covered lighter built in 1944 for service in World War II. She was later acquired by the United States Coast Guard
USCGC_White_Sage
White-class buoy tender of the United States Coast Guard
USS YF-416 was an American YF-257-class covered lighter built in 1943 for service in World War II. She was later acquired by the United States Coast Guard
USCGC_White_Sumac
Airlines Flight 1 (1936) Accident – aircraft Near Goodwin, Arkansas 17 1944 USS YF-415 Accident – shipwreck Hingham, Massachusetts Including one person who died
List of disasters in the United States by death toll
List_of_disasters_in_the_United_States_by_death_toll
High-bypass turbofan aircraft engine
Aerospace Regional JetLiner (formerly BAe 146) in 1992 LF509: A 9,000 lbf thrust (40 kN) turbofan engine for the Avro RJ100 LF511D: An 11,000 lbf thrust (49 kN)
Lycoming_ALF_502
American aerospace engineer (1910–1990)
history. Over 40 models serving in at least 60 nations. U-2, high altitude intelligence gathering aircraft. Blackbird family: A-12, YF-12, SR-71, M-21
Kelly_Johnson_(engineer)
U.S. Air Force facility in Nevada
prototype 79–780, designated YF-117A. At 6:05 am on 18 June 1981 Lockheed Skunk Works test pilot Hal Farley lifted the nose of YF-117A 79–780 off the runway
Area_51
Kushiro S. Ueda, H. Kaneda · 4.4 km (2.7 mi) MPC · JPL 7186 Tomioka 1991 YF Tomioka December 26, 1991 Kitami K. Endate, K. Watanabe · 13 km (8.1 mi)
List of minor planets: 7001–8000
List_of_minor_planets:_7001–8000
Retrieved 2023-11-15. "FLASHBACK: Triplesonic Interceptors: The F-103, F-108 & YF-12A". Air Force Materiel Command. 2020-01-16. Retrieved 2023-12-13. "XF-103
List of United States fighter aircraft
List_of_United_States_fighter_aircraft
Canceled interceptor aircraft project
system was eventually used in the Lockheed YF-12 program. The final configuration for the rear cockpit in the YF-12A looked similar to that of the F-108
North_American_XF-108_Rapier
with their collaboration to produce a children's song and call themselves YF meaning "Young Father". Haru rides the Tayo bus, where Tablo takes her to
List of The Return of Superman episodes
List_of_The_Return_of_Superman_episodes
Chen YF (CHN) 21 17 21 K Smagulova (KAZ) 7 7 Yeo J M (SGP) 21 21 Yeo J M (SGP) 21 7 9 2 Chen YF (CHN) 19 21 21 Z de Jesus (TLS) 1 1 2 Chen YF (CHN)
Badminton at the 2022 Asian Games – Women's singles
Badminton_at_the_2022_Asian_Games_–_Women's_singles
American aerospace company (1939–1994)
P-600, and eventually the YF-17 Cobra, which lost the competition to the General Dynamics F-16 Fighting Falcon. Nevertheless, the YF-17 Cobra was modified
Northrop_Corporation
Ship built in 1944
History United States Name YF-341 Operator US Navy Builder Basalt Ship Building Laid down 3 August 1943 Launched 8 April 1944 Fate Transferred to the US
MV_White_Holly
Type of aircraft jet engine intake duct
TriStar Lockheed Martin F-22 Raptor Lockheed YF-22 Mikoyan Project 1.44 Northrop Grumman B-2 Spirit Northrop YF-23 (inverse S-duct) Short SC.1 Sukhoi Su-47
S-duct
Sporting event delegation
21–15) Chow M K / Lee M Y (MAS) W (21–17, 16–21, 21–19) Chen Qc / Jia Yf (CHN) L (11–21, 22–24) did not advance Rutaparna Panda Arathi Sara Sunil Chaladchalam
India_at_the_2018_Asian_Games
YF-852-class of the United States Navy
USS YF-854 was an American YF-852-class covered lighter built in 1945. She was later commissioned by the United States Navy and renamed USS Littlehales
USS_Littlehales_(AGSC-15)
Advanced prototyping arm of the Boeing Company
Condor: High Altitude Long Endurance concept drone Northrop/McDonnell Douglas YF-23: Black Widow II Advanced Tactical Fighter demonstrator McDonnell Douglas
Boeing_Phantom_Works
UFOs with triangular shape and dark color
History Channel on 29 October 2008. Around 8 January 2008, approximately 40 people saw a large triangular UFO in Stephenville, Texas. One witness, a veteran
Black_triangle_(UFO)
White-class buoy tender of the United States Coast Guard
USS YF-446 was an American YF-257-class covered lighter built in 1943 for service in World War II. She was later acquired by the United States Coast Guard
USCGC_White_Lupine
December 11, 2004 Mauna Kea Mauna Kea other TNO 502 km MPC · JPL 612912 2004 YF — December 17, 2004 Socorro LINEAR · 1.2 km MPC · JPL 612913 2004 YS13 —
List of minor planets: 612001–613000
List_of_minor_planets:_612001–613000
2003 XJ26 — December 1, 2003 Socorro LINEAR · 4.4 km MPC · JPL 229011 2003 YF — December 16, 2003 Socorro LINEAR H 1.1 km MPC · JPL 229012 2003 YD14 — December
List of minor planets: 229001–230000
List_of_minor_planets:_229001–230000
Prototype fighter aircraft developed from F-5
Pace, Steve. X-Fighters: USAF Experimental and Prototype Fighters, XP-59 to YF-23. St. Paul, MN: Motorbooks International, 1991. ISBN 0-87938-540-5. Scutts
Northrop_F-20_Tigershark
Soviet 4th generation fighter aircraft
the development of airframes under similar performance demands such as the YF-22 and JAS-39 Gripen were rectified during the FBW development process through
Sukhoi_Su-27
White-class buoy tender of the United States Coast Guard
USS YF-448 was an American YF-257-class covered lighter built in 1943 for service in World War II. She was later acquired by the United States Coast Guard
USCGC_White_Pine
Series of carrier-based multirole combat aircraft
Douglas F-15 Eagle; the YF-17 lost the competition to the YF-16 for the Air Force's LWF, but the Navy found the twin-engine YF-17 design to be more suitable
Boeing_F/A-18E/F_Super_Hornet
Launch vehicle
(CASC). The vehicle is a further development of the Long March 6, with two YF-100 engines on the first stage as opposed to one on the Long March 6, augmented
Long_March_6A
Main-belt asteroid
along with less than 20% olivine. The high-calcium form of pyroxene forms 40% or more of the total pyroxene present, indicating a history of igneous rock
17_Thetis
American heavy strategic bomber
Advanced Tactical Fighter program, which would produce the Lockheed YF-22 and Northrop YF-23, and later the Lockheed Martin F-22. Northrop was the B-2's prime
Northrop_B-2_Spirit
Species of fungus
lesions]". Zhong Xi Yi Jie He Za Zhi. 11 (4): 225–6, 198. PMID 1773459. Lin YF, Wu GL (1988). "[Protective effect of Polyporus umbellatus polysaccharide
Polyporus_umbellatus
American defense manufacturing conglomerate
lightweight fighter, the YF-16. The YF-16 first flew in January 1974 and proved slightly better performance than the Northrop Grumman YF-17 in head-to-head
General_Dynamics
1999 XY256 — December 7, 1999 Catalina CSS EOS 5.0 km MPC · JPL 97335 1999 YF — December 16, 1999 Socorro LINEAR H 1.0 km MPC · JPL 97336 Thomasafleming
List of minor planets: 97001–98000
List_of_minor_planets:_97001–98000
Gastrointestinal peptide hormone involved in glucose homeostasis
Wang XH, Li L, Hölscher C, Pan YF, Chen XR, Qi JS (November 2010). "Val8-glucagon-like peptide-1 protects against Aβ1-40-induced impairment of hippocampal
Glucagon-like_peptide-1
Prolific TV & Film Composer Was 93". Deadline Hollywood. Wang, Hsin-yu; Low, Y.F. (October 7, 2025). "'The Kung-Fu Kids' star Yen Cheng-kuo dies at 50". Central
2025_in_film
1, 1994 Ōizumi T. Kobayashi · 8.1 km MPC · JPL 11974 Yasuhidefujita 1994 YF Yasuhidefujita December 24, 1994 Ōizumi T. Kobayashi THM 10 km MPC · JPL 11975
List of minor planets: 11001–12000
List_of_minor_planets:_11001–12000
Type of rocket engine which uses liquid fuel stored at very low temperatures
Active China YF-73 Gas-generator Upper stage Retired YF-75 Gas-generator Upper stage Active YF-75D Expander cycle Upper stage Active YF-77 Gas-generator
Cryogenic_rocket_engine
American all-weather multirole fighter aircraft
companies under an offset agreement, wherein South Korea was responsible for 40% of production and 25% of assembly. The fuselage and wings are supplied by
McDonnell Douglas F-15E Strike Eagle
McDonnell_Douglas_F-15E_Strike_Eagle
"François Sabourin". People's Party of Canada. Retrieved August 3, 2026. "YF Blanchet Introduces Candidate for Saint-Hyacinthe–Bagot–Acton – July 16, 2026"
By-elections to the 45th Canadian Parliament
By-elections_to_the_45th_Canadian_Parliament
1995 video game
three aircraft, namely the Grumman F-14 Tomcat, Sukhoi Su-35 and the Lockheed YF-22. It was available as either an arcade conversion kit for the original Namco
Air_Combat_22
the calculations shown here, all periods are of five years, so yi + 5 = yf and the formula simplifies to: ( p f p i 5 − 1 ) × 100 {\displaystyle
List of countries by past and projected future population
List_of_countries_by_past_and_projected_future_population
Chinese orbital launch vehicle
meters diameter core stage), and has 2 upgraded versions of the YF-75D engines (known as the YF-75H) with increased thrust to 10 tonnes each through measures
Long_March_8
1989 Palomar E. F. Helin EUN 6.0 km (3.7 mi) MPC · JPL 5518 Mariobotta 1989 YF Mariobotta December 30, 1989 Chions J. M. Baur slow 7.2 km (4.5 mi) MPC ·
List of minor planets: 5001–6000
List_of_minor_planets:_5001–6000
Family of interceptor and reconnaissance aircraft
F-106 Delta Dart English Electric Lightning Grumman F-14 Tomcat Lockheed YF-12 Lockheed SR-71 Blackbird McDonnell Douglas F-15 Eagle North American A-5
Mikoyan-Gurevich_MiG-25
Megathrust earthquake in Russia
moment magnitudes" (PDF). Izvestiya Physics of the Solid Earth. 40 (3): 206–215. Kopnichev, Y.F.; Sokolova, I.N. (2025). "Ring-Shaped Seismicity Structures
2025_Kamchatka_earthquake
2002 XF112 — December 6, 2002 Socorro LINEAR · 2.6 km MPC · JPL 114384 2002 YF — December 27, 2002 Anderson Mesa LONEOS · 7.7 km MPC · JPL 114385 2002 YX
List of minor planets: 114001–115000
List_of_minor_planets:_114001–115000
Motor vehicle
Renault also introduced vehicles with new diesel and petrol engines: the YF, replacing the SZ, and the YG tractor unit, replacing the SY. For 1934, Renault
Early 1930s Renault commercial vehicles
Early_1930s_Renault_commercial_vehicles
system engineer for the MESSENGER spacecraft JPL · 7182 7186 Tomioka 1991 YF Hiroyuki Tomioka (born 1942), director of weather information in Hitachi City
Meanings of minor-planet names: 7001–8000
Meanings_of_minor-planet_names:_7001–8000
Experimental 1980s USAF aircraft
E-8 Joint STARS aircraft. Tacit Blue was given the cover designation of "YF-117D" by the Air Force. Tacit Blue, nicknamed "the whale" (and sometimes also
Northrop_Tacit_Blue
travel, tourism, insurance
YF 40
YF 40
YF 40
YF 40
YF 40
YF 40
YF 40
YF 40
YF 40
travel, tourism, insurance