ASK 21 & ASK 21 Mi

Compatibility: Flight Simulator X, FSX: Steam Edition, P3D v2
ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi ASK21 & ASK21 Mi
The Alexander-Schleicher ASK 21 (and its motorised brother the ASK 21 Mi) are gliders that many people will recognise; this two-seater (Club Class) sailplane is used by many clubs as a trainer, and is also a capable cross-country and aerobatics aircraft.

This version for FSX and P3D is special in many ways. Not only are all the instruments accurate (the real manuals are ven supplied for the most important one!) but the flight characteristics are the real highlight of this add-on. Where the simulator is not correct (or lacking), special modules are used to make the handling more realistic. The result is an aircraft with unprecedented accuracy in its flight behaviour. It feels ‘real’ and even people who have not flown this aircraft will quickly appreciate the way it flies.

If you have ever wanted to experience gliders in your simulator, there is no better choice than the ASK21. It’s as real as it gets on a computer!

See the Detailed Description section for the full list of features!


  • Professional development that took two years
  • Two versions: pure glider (ASK 21) and motorised version (ASK 21 Mi)
  • Highly detailed 3D modelling using the latest standards
  • Several panel versions (German/English, Metric/Imperial)
  • Seven liveries
  • Extremely detailed flight model using modules to correct unrealistic behaviour created by the simulator that even models effects like AOA-dependent adverse yaw effect
  • Airspeed indicator programmed to show slip angle deviation
  • Accurate drag caused by the engine and propeller, even when the engine is stopped
  • Many special wind sound effects (open window, slip, stall etc.)
  • Two (selectable) inlets for the static system to avoid problems when motoring
  • Non-standard wing flexing (better than any other you've ever seen!)
  • All instruments work realistically (unlike those in the default glider) including TEK and NETTO variometer
  • Yaw string to assist with coordinated flight
  • Includes highly realistic C4 Flight Computer which will assist you with finding the best speed and routes (the real manual is provided for this!)
  • Realistic transponder
  • Realistic compass (modelled to actually reflect it floating in liquid)
  • High fidelity sound, recorded in flight
  • Project fully supported by Alexander-Schleicher Flugzeugbau and SDI Variometers
  • Includes licensed version of WinchX so you can use winch launches
  • When incorrect FSX settings are detected the aircraft systems will warn the user
  • As well as the manual (for use in FSX etc.) the real manuals from Alexander-Schleicher Flugzeugbau and SDI Variometers are included
  • Excellent frame rates and low VAS requirements

System Requirements:

  • Flight Simulator X (Acceleration, Gold, Steam Edition or SP2 required) or Prepar3D v2
  • 3.0GHz or any Dual Core
  • 4.0GB RAM
  • 512MB graphics card
  • Windows 8 / 7 / Vista / XP (32-bit or 64-bit)
  • 600MB hard drive space
In Stock
Earn up to 103 points.

ASK21 & ASK21 Mi For a truly realistic gliding experience in FSX and P3D v2, try this two-seater from Aerosoft which also comes in a motorised variant. Both gliders feature instruments so accurate that the real-world manuals are included and exceptionally authentic gliding flight dynamics.

Features include seven liveries, several panel versions, realistic C4 flight computer, authentic drag effects, special wind sound effects, non-standard wing flex, the WinchX utility for winch launches and much more!

Download size: 178MB (learn about downloads)

In Stock
Earn up to 103 points.