YF

YF, Y.F., or Yf can refer to:

Fictional vehicles:

• YF-19 Alpha One Excalibur, a spacecraft in the anime series Macross
• YF-21 Omega One, a spacecraft in the anime series Macross

Real vehicles:

• A series of American aircraft, including:
  • Lockheed YF-12
  • YF-16, also known as General Dynamics F-16 Fighting Falcon
  • Northrop YF-17
  • Lockheed YF-22
  • Northrop YF-23
  • North American YF-93
• A series of Chinese rockets, including:
  • YF-50t
  • YF-73
  • YF-75
  • YF-77
  • YF-100
• Yamaha YF 60, an all-terrain vehicle
• USS YF-116, a later name for the freight lighter USS Fashion (ID-755)

Squadrons:

• YF, the MODEX code for Marine Heavy Helicopter Squadron-462 (The Heavy Haulers, or its nickname "The Screw Crew")