YF-66 'Monarch' KCS
by JollyGreenGI
uploaded 2017-11-18
(updated 2017-12-11)
mod aircraft
#YF-12 #Mach3


  • Automated Aerial Refueling System
  • BDArmory
  • Ferram Aerospace Research
  • Squad (stock)
  • dck
  • Advanced Jet Engines


  • Type: SPH
  • Class: aircraft
  • Part Count: 111
  • Mods: 5


They all laughed when you ran from fist fights, but now the ‘Monarch’ has your back. With a cruise speed above Mach 2 and top speed faster than the Sun, you can strike back and be out of sight before they know what hit them.


  • Crew: 2
  • Length: 29.14 m
  • Wingspan: 14.78 m
  • Height: 4.72 m
  • Empty Weight: 25,577 kg
  • Loaded Weight: 36,877kg
  • Max. takeoff weight: 40,000 kg
  • Powerplant: 2x J58 afterburning turbojets
    • Dry Thrust: 92 kN each
    • Thrust with Afterburner: 125.2 kN each


  • Never Exceed Speed: Mach 4.04 - No really, don’t.
  • Maximum Speed: Mach 3.8
  • Cruise Speed: Mach 2.2
  • Stall Speed: 110 m/s
  • Service Ceiling: 20000 m @ Mach 3
  • Range: 1,884 km aka half way around Kerbin
  • Rate of Climb: 50 m/s
  • Thrust/Weight: 0.52
  • Max G-load: +10 g


  • Hardpoints: 3 internal weapon mounts in bay, max payload 4,000 kg

  • Missiles:

    • 3× AIM-120 AMRAAMs
    • 3x AGM-88 HARMs
    • 2x AGM-86C Cruise Missile
  • Bombs:

    • idk 3 JDAMs maybe?


  • 2x AN/APG-63V2 radars (one rear-facing)
  • BDA Weapon Manager
  • AI Pilot Flight Computer

Flight tips:

  • The YF-66 is a fickle and potentially dangerous aircraft to pilot. One must take care and always be light on the control stick. Deviating past an Angle of Attack greater than 10° may result in loss of control and an unrecoverable flatspin.

  • Reaching maximum speed isn’t as easy as simply pointing straight and opening the throttle. Cruise speed must be reached at 15,000m and a shallow dive must be entered until 10,000m. At this point you should be well over Mach 3 and accelerating. A shallow ascent will get you past the 20km service ceiling.

It’s got two wings and flies, is there anything else you need?

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