KING AIR 350 for X-Plane 12

 Airfoillabs King Air 350 XP12 – Study-level turboprop, freshly upgraded in v 2.0.0

Step into a deeply simulated King Air 350 built natively for X-Plane 12 – now with a major 2.0.0 refresh: sharper interior visuals, smoother autopilot, reliable RNAV vertical guidance, and refined engine & electrical behavior.

Whether you’re a real-world pilot, a systems nerd, or a casual simmer who just wants to fly, the Airfoillabs KA350 lets you choose between “one click to the sky” and full procedural immersion – without ever feeling overwhelmed.

 At a Glance

•  v2.0.0 visual & systems refresh
  Reworked interior textures & materials in higher resolution, new X-Plane 12 detail textures, fixed normals, corrected object placements & animations, plus a big pass on autopilot stability and RNAV vertical guidance.

•  Study-level systems
  Deep simulation of electrical, fuel, pneumatics, pressurization, ice & rain protection, engines & prop governors, annunciators, failures – tuned against real documentation and performance data.

•  Pilot-friendly smart UI
  Intuitive XJet-powered interface, predefined aircraft states, automated spoken checklists, weight & balance tools, walk-around mode, and 2D panels for busy phases of flight.

•  High-fidelity 3D & PBR
  Ultra-detailed PBR cockpit & exterior, ice, rain, wipers, realistic glass and wear, plus optimized object & texture layout for smooth performance.

•  Immersive FMOD sound
  Rich multi-layer engine and cockpit soundscape based on real King Air 350 recordings, with detailed switch, relay, environment and ground-movement audio.

•  Back in active development
  After a longer pause, we are returning to the King Air 350 with this big v2.0 update and a plan for more frequent, focused updates going forward.

 What’s New in Version 2.0.0

 3D & Cockpit Visuals

• Reworked interior textures & materials for a cleaner, sharper cockpit.

• X-Plane detail textures integrated for improved surface richness.

• Fixed normals, object placements and animations for more natural shading and movement.

 Flight Guidance & Avionics

• Autopilot roll oscillation in HDG/NAV modes eliminated – no more constant bank “hunting”.

• Improved pitch and roll stability for a calmer, more predictable AP.

• Fixed RNAV approach glidepath capture – the aircraft now reliably descends on RNAV approaches in FMS mode.

• FMS/GPS vertical guidance corrected for realistic route and approach behavior.

• Fixed unwanted autothrottle activation in the default FMS variant so the system no longer grabs your throttles on landing.

 Electrical & Avionics Logic

• Correct gen-bus behavior: buses stay powered appropriately with engines off (e.g. during a glide).

• GPU now supplies power correctly, preventing battery drain with external power connected.

• Battery failure logic and consequences refined for more believable scenarios.

• DME power logic fixed – now tied to the proper avionics bus, behaving correctly from Cold & Dark.

• Transponder ALT mode now outputs the correct Mode C when set to ALT.

 Handling & Engines

• Fixed unrealistic yaw on takeoff roll – no more wrong-way “pull”; behavior tuned toward expected rudder input.

• Gust lock behavior corrected (can’t be activated in flight, proper conditions for activation/deactivation).

• Engine starter torque/RPM/spool-up time updated based on real aircraft data for more authentic start-up sequences.

 The Aircraft – The “Analog Beast”

The Airfoillabs King Air 350 XP12 represents the era just before the avionics upgrade, focusing on the beauty of a largely analog cockpit supported by powerful turboprop performance:

• Two PT6A-60A engines, each delivering 1,050 SHP.

• Fast cruise around 311 KTAS, range roughly 1,550 NM.

• Climb performance up to 2,700 ft/min under ideal conditions.

• Short-field capable with takeoff and landing distances in the low 3,000 ft range (when flown by the book).

All of this is backed by a flight model tuned to match real performance tables as closely as possible within X-Plane 12.

 Deep Systems – Study Level, Not Overwhelming

The KA350 is a study-level simulation, but it doesn’t force you to learn everything at once.

Major system areas simulated:

•  Electrical
  Multi-bus DC and AC system with generators, inverters, relays, realistic bus logic, and loads affecting annunciators and lighting.

•  Fuel & APU
  Accurate fuel cells, boost & transfer pumps, crossfeed, firewall valves, vents and drains. APU with proper start and electrical integration.

•  Engines & Propellers
  Custom simulation of Alpha/Beta/Reverse regimes, low-pitch stops, feathering and autofeather logic, inertial separators, engine anti-ice and test logic.

•  Pneumatics, Ice & Rain, Pressurization
  Environmental controls, de-ice boots, windshield anti-ice and wipers, pitot heat, engine inlet heat, pressurization controller with test logic.

•  Avionics & Autopilot
  Dual GNS 530 plus support for GTN 750 configurations (where available), weather radar simulation, custom autopilot mode logic (including VNAV, approach modes, etc.) tied into X-Plane’s navdata.

All of this is integrated into a Master Warning/Annunciator system that mirrors the complexity of the real aircraft.

 Smart Tools & User Experience

We’ve built a toolset around the airplane so you can fly the way you like:

•  XJet-based UI
  A modern plugin framework handling licensing, auto-updates, and deep integration into X-Plane 12 on Windows, macOS and Linux.

•  Aircraft States & Checklists
  One-click Cold & Dark, Before Engine Start, Before Taxi, Before Takeoff – plus automated checklists with spoken callouts, hints and camera focus so you can learn procedures step by step.

•  Weight & Balance + Performance
  Real-world performance tables converted into code to compute takeoff/landing speeds and distances, and visualize loading and CG.

•  Walk-around Mode
  Move around inside and outside the aircraft, climb stairs, interact during preflight, with collision and basic G-force simulation.

•  2D Panels & Views
  Detachable 2D panels for key systems, optimized for multi-monitor or busy IFR flights, plus integrated camera views for quick cockpit navigation.

 Development Roadmap – We’re Back

This 2.0.0 update is more than just another patch:
after a longer pause in development, we’re returning to the King Air 350 XP12 with renewed focus. Our plan is to deliver more frequent, meaningful updates that refine systems, visuals and user experience step by step.

If you’re looking for a serious King Air 350 that can grow with you – from quick hops to full procedure training – this is your turboprop.

 Welcome back on board the Airfoillabs King Air 350 XP12.