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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
Topics referred to by the same term
YF may refer to: YF, US Navy hull classifification symbol for Covered barge, self propelled YF, US aircraft designator for Prototype Fighter YF, tail
YF
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
American aircraft prototype
The Lockheed–Boeing–General Dynamics YF-22 is an American single-seat, twin-engine, stealth fighter prototype technology demonstrator designed for the
Lockheed_YF-22
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
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
Chinese rocket engine
The YF-100 is a Chinese liquid rocket engine burning LOX and kerosene in an oxidizer-rich staged combustion cycle. The engine is designed for use on the
YF-100
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
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
Chinese rocket 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
YF-20
Chinese liquid-fuel rocket engine
The YF-215 is a liquid cryogenic rocket engine burning liquid methane and liquid oxygen in a full-flow staged combustion cycle. The engine is currently
YF-215
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
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
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
Series of all-weather interceptor aircraft
afterburner to the Allison J33 powerplant used. On 16 April 1949, the prototype YF-94 conducted its maiden flight. While teething problems were encountered,
Lockheed_F-94_Starfire
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
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
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
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 rocket engine
The YF-75D is a cryogenic rocket engine burning liquid hydrogen and liquid oxygen in a closed expander cycle. It is China's third generation of upper stage
YF-75D
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
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
Chinese rocket engine
The YF-115 is a Chinese liquid rocket engine burning LOX and kerosene in an oxidizer-rich staged combustion cycle. A high efficiency/high thrust environmental-friendly
YF-115
Chinese super-heavy carrier rocket
a common design: a five-meter-wide kerolox-fuelled stage powered by seven YF-100K engines. It is designed to launch a single Mengzhou crewed orbiter or
Long_March_10
United States MiG-21 evaluation project
and United States Navy pilots evaluated the MiG-21, redesignated as the "YF-110", in a variety of situations. The aircraft was referred to as "The Doughnut"
Have_Doughnut
Chinese liquid rocket engine
The YF-1 was a Chinese liquid rocket engine burning N2O4 and UDMH in a gas generator cycle. It is a basic engine which when mounted in a four engine module
YF-1
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
Chinese rocket engine
generation of upper stage cryogenic propellant engine, after the YF-73, YF-75 and the YF-75D. It can do multiple restarts thanks to an electric spark igniter
YF-79
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
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
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
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
A covered lighter in service with the United States Navy during World War II
YF-415 was a self-propelled covered lighter in service with the United States Navy during World War II. It was accidentally sunk on May 11, 1944, while
USS_YF-415
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
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
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
Chinese liquid-fuel rocket engine
The YF-90 is a liquid cryogenic rocket engine burning liquid hydrogen and liquid oxygen in a staged combustion cycle. It is China's first hydrogen-oxygen
YF-90
Experimental aircraft in the US
at a time) for yaw control. The aircraft, which had given the designation "YF-118G" as a cover, was made public on October 18, 2002. The Bird of Prey was
Boeing_Bird_of_Prey
United States Air Force technology evaluation program
F-15 Eagle. It resulted in the development of the General Dynamics YF-16 and Northrop YF-17. Late in the program, in 1974, with the promise of European sales
Lightweight_Fighter_program
Chinese rocket engine
The YF-130 is a Chinese rocket engine fueled by LOX and kerosene in an oxidizer-rich staged combustion cycle currently in development. It has been designed
YF-130
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
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
Group of American combat aircraft
the designations F-13 and F-19 were not assigned. The prototype Northrop YF-17, which later evolved into the F/A-18, is generally not considered part
Teen_Series
Chinese rocket engine
The YF-75 is a liquid cryogenic rocket engine burning liquid hydrogen and liquid oxygen in a gas generator cycle. It is China's second generation of cryogenic
YF-75
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
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
Chinese heavy lift rocket
Angara A5. The hydrolox core stage uses two YF-77 engines, while its four kerolox boosters each use two YF-100 engines, ultimately derived from the Soviet
Long_March_5
Soviet variable-sweep wing fighter-bomber
The Sukhoi Su-17 (izdeliye S-32; NATO reporting name: Fitter) is a variable-sweep wing fighter-bomber developed for the Soviet military. Developed from
Sukhoi_Su-17
Chinese rocket engine
The YF-77 is China's first cryogenic rocket engine developed for booster applications. It burns liquid hydrogen fuel and liquid oxygen oxidizer using a
YF-77
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
2026 badminton tournament in Thailand
Miyazaki 21 21 5 T Miyazaki 15 18 2 Chen YF 21 21 M Bansod 13 26 21 W Y Zhang 21 24 13 M Bansod 12 7 2 Chen YF 21 21 A Kharb 21 13 18 2 Chen YF 19 21 21
2026 Thailand Open (badminton)
2026_Thailand_Open_(badminton)
Interpreter for BASIC software
P=160: Q=100 30 XP=144: XR=1.5*3.1415927 40 YP=56: YR=1: ZP=64 50 XF=XR/XP: YF=YP/YR: ZF=XR/ZP 60 FOR ZI=-Q TO Q-l 70 IF ZI<-ZP OR ZI>ZP GOTO 150 80 ZT=ZI*XP/ZP:
Yabasic
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
unit RSG-1 / RSG-3 / RSG-5 / RSG-10 / RSG-30 (2008, for U1/U3/-/UX10/b121/YF&b113) ensemble unit RE-1 / RE-3 / RE-10 / RE-30 (1999, for U1/U3/UX10/W100)
List of Yamaha Corporation products
List_of_Yamaha_Corporation_products
Chinese rocket engine
application are: YF-24: A module comprising an YF-22 and a single YF-23 verniers. YF-24B: A module comprising an YF-22B and a single YF-23B verniers. YF-24E: A
YF-23_(rocket_engine)
Rocket engine
The YF-102 is a Chinese liquid rocket engine burning LOX and kerosene in a gas generator cycle. It is manufactured by the AALPT based on the experience
YF-102_(rocket_engine)
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
US Navy freight lighter
USS Fashion (ID-755), later USS Freight Lighter No. 116, later USS YF-116, was a United States Navy freight lighter in commission from 1918 to 1922. Fashion
USS_Fashion
Chinese liquid-fuel rocket engine
The YF-209 is a liquid cryogenic rocket engine burning liquid methane and liquid oxygen in a gas-generator cycle. The engine is designed for reusability
YF-209
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
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
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
High-bypass turbofan aircraft engine
The Lycoming ALF 502/LF 507 (later Honeywell ALF 502/LF 507) is a geared turbofan engine produced by Lycoming Engines, AlliedSignal, and Honeywell Aerospace
Lycoming_ALF_502
Squadron in the US Air Force
designations. YF-110B Soviet MiG-21F-13 YF-110C Chinese Chengdu J-7B (MiG-21F-13 variant) YF-110D Soviet MiG-21MF YF-113B Soviet MiG-23BN YF-113E Soviet
4477th Test and Evaluation Squadron
4477th_Test_and_Evaluation_Squadron
Chinese commercial medium-lift rocket
In development Launch sites Wenchang Commercial First stage Powered by 7 × YF-100K Maximum thrust SL: 8,750 kN (1,970,000 lbf) vac: 9,772 kN (2,197,000 lbf)
Long_March_10B
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
It is a function of a country's total output, II = C (Yf - T) + I + G + CA (E x P*/P, Yf-T; Yf* - T*) Internal balance = Consumption [determined by disposable
Internal_balance
Viral pulmonary disease of humans
3390/microorganisms11122963. PMC 10745754. PMID 38138107. Obando-Rico CJ, Valencia-Grajales YF, Bonilla-Aldana DK (January–February 2023). "Prevalence of Orthohantavirus
Hantavirus_pulmonary_syndrome
Pandemic caused by SARS-CoV-2
568–576. doi:10.1002/jmv.25748. PMC 7228347. PMID 32134116. Martel J, Ko YF, Young JD, Ojcius DM (May 2020). "Could nasal nitric oxide help to mitigate
COVID-19_pandemic
Chinese medium-lift carrier rocket
first stage is powered by four YF-100K 1250 KN engines using RP-1 and liquid oxygen while its second stage is powered by two YF-115 180 kN engines also using
Long_March_12
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
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)
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
United States Air Force military unit
Tactical Fighter program flyoff competition between the Lockheed YF-22 and Northrop YF-23 prototypes. Following the completion of the competition, the
411th_Flight_Test_Squadron
Hydroski jet fighter, U.S. Navy, 1953
one F2Y was still in storage as of 1962. As a result, it was redesignated YF-7A under the 1962 United States Tri-Service aircraft designation system. United
Convair_F2Y_Sea_Dart
List of ships with the same or similar names
converted to a minesweeper, soon reclassified as a covered lighter (YF-381) and renamed USS YF-381 USS Chanticleer (ASR-7), a submarine rescue vessel commissioned
USS_Chanticleer
American test pilot (1921–1984)
pilot who set several speed and altitude records while testing the Lockheed YF-12 and SR-71. Robert L. Stephens was born on December 1, 1921, and raised
Robert_L._Stephens
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
mounted in the nose. Fifteen converted. YF-4E One of the original YRF-4C prototypes was converted into the YF-4E. The YF-4E was used in the development of the
List of McDonnell Douglas F-4 Phantom II variants
List_of_McDonnell_Douglas_F-4_Phantom_II_variants
Chinese medium-lift reusable carrier rocket
Aerospace Science and Technology Corporation, the design team selected the YF-102R and YF-102RV for the CZ-12B due to the robustness and relative simplicity of
Long_March_12B
Homebuilt aircraft
The Windstar YF-80 is an American single-seat homebuilt replica of the Lockheed F-80. By 1987, the project was not complete, resulting in a court case
Windstar_YF-80
American aircraft manufacturer (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
Class of Chinese rockets
the fuel. The upper stages (third stage) of Long March 3 rockets use YF-73 and YF-75 engines, using liquid hydrogen (LH2) as the fuel and liquid oxygen
Long_March_(rocket_family)
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
Gives power series for certain implict functions
function f {\displaystyle f} such that v = x + y f ( v ) {\displaystyle v=x+yf(v)} Then for any function g {\displaystyle g} , for small enough y {\displaystyle
Lagrange_reversion_theorem
Species of plant
heptaphyllum (L.) Y.F.Deng", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2023-01-31 "Heptapleurum heptaphyllum (L.) Y.F.Deng", The International
Heptapleurum_heptaphyllum
Jet fuel formulation for certain supersonic aircraft
subsequently for aircraft with similar high speed performance, the Lockheed YF-12 and Lockheed SR-71. It was also used for the higher speed Boeing X-51 Waverider
JP-7
Swiss football club
Sportclub Young Fellows Juventus is a professional Swiss football club based in Zürich. It was founded in 1992 following a merger between Young Fellows
SC_Young_Fellows_Juventus
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
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
1913 freight lighter
Catherine Johnson (SP-379), later USS Freight Lighter No. 161, later USS YF-161, later USS YC-660, was a freight lighter in commission in the United States
USS_Catherine_Johnson
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
Heroic outlaw in English folklore
come down the road if he happens to be poor. Of my good he shall haue some, Yf he be a por man. As it happens the next traveller is not poor, but it seems
Robin_Hood
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
Topics referred to by the same term
Look up saif in Wiktionary, the free dictionary. Saif, Seif, Sayf or Seife (Arabic: سيف, Amharic: ሰይፍ) is a word in the Semitic languages meaning 'sword'
Saif
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
Proposed fighter aircraft
Northrop/McDonnell Douglas F/A-18 Hornet. Following the YF-16's victory over the Northrop YF-17 for the U.S. Air Force's Air Combat Fighter program, General
Vought_Model_1600
Main-belt asteroid
Thetis (Greek mythology) Alternative designations 1954 SO1 · A913 CA A916 YF Minor planet category main-belt · (inner) Adjectives Thetidian /θɛˈtɪdiən/
17_Thetis
YF
YF
Boy/Male
Shakespearean
As YFou Like It' The court jester.
Surname or Lastname
English
English : habitational name from a place in Humberside named in Old English Yferingaham ‘homestead (hÄm) of the people (-inga-) of Eofor’.
Surname or Lastname
French
French : variant of Rivière, Rivoire, or Rivier, topographic name for someone living on the banks of a river, French rivier ‘bank’, or habitational name from any of the many places in France named with this word.English : nickname from Middle English revere ‘reiver’, ‘robber’.English : topographic name for someone who lived on the brow of a hill, from a misdivision of the Middle English phrase atter evere ‘at the brow or edge’ (from Old English yfer, efer ‘edge’) or a habitational name from a place named with this phrase, as for example River in West Sussex or Rivar in Wiltshire.Jewish (from Italy) : habitational name from a place in Mantua named Revere.The MA patriot Paul Revere (1734–1818), who in April 1775 undertook a famous ride from Boston to Lexington to warn of the approach of British troops, was a silversmith and instrument maker. He was descended from French Huguenots called Rivoire.
Surname or Lastname
Norwegian
Norwegian : habitational name from any of some twenty farmsteads, mainly in Telemark and on the west coast, named Øverland, from øver ‘upper’ + land ‘land’.English : habitational name from Overland Farm in Kent, named with Old English yfer ‘hill brow’ + land ‘land’.
YF
YF
Girl/Female
Tamil
One end of Saree which is free
Boy/Male
Scottish Irish
From the craggy hills.' Tor is a name for a craggy hilltop and also may refer to a watchtower.
Boy/Male
Hindu, Indian
A Jewel
Boy/Male
Italian Spanish
Abbreviation of Donatello 'gift from God.
Girl/Female
Tamil
River
Surname or Lastname
English (also Wrayford)
English (also Wrayford) : topographic name for someone who lived by a ford on the Wray river.Probably an Americanized spelling of German Reifarth, Raifarth, or Reifert, from a Germanic personal name composed of the elements rīc ‘power(ful)’ + frid- ‘peace’.
Boy/Male
Hindu, Indian
Awesome
Boy/Male
Hebrew
Other.
Boy/Male
Hindu
Blessing of God
Boy/Male
English
Man of the land.
YF
YF
YF
YF
YF
adv.
Together. See Ifere.