Schleicher ASK 21
The Schleicher ASK 21 is a modern glass-reinforced plastic two-seater glider with a mid-set wing and a mass balanced T-tail. The ASK 21 is designed primarily for beginner instruction, but is also suitable for cross-country flying and aerobatic instruction.
|Ctrl+w||Place winch in front of aircraft, hook in and start winch launch|
|W||Increase winch speed|
|w||Decrease winch speed|
|Ctrl+o||Find aircraft for aerotow and hook in|
|o||Open both hooks (pulls the yellow lever)|
|Ctrl+b||Toggle battery master switch|
|Ctrl+t||Toggle turn coordinator switch|
|S||Turn up vario volume|
|s||Turn down vario volume|
|Ctrl+s||Start/stop smoke (for aerobatics)|
|u||Show current QNH and current pressure|
|Q||Show current wind data|
Some data good to know
Data based on flight manual 
|MTOW||600 kg (1322 lbs)|
|Vne||280 kmh (151 kts)||never exceed|
|VB||200 kmh (107 kts)||max speed in gusty winds, like in Cb clouds or overflying mountain ridges|
|VM||180 kmh (97 kts)||max maneuver speed|
|VT||180 kmh (97 kts)||max aerotow speed|
|VT||150 kmh (80 kts)||max winch tow speed|
Maximal G-Forces (at 180kmh/97kts): +6,5 -4,0
Maximal crosswind : 15kmh (8kts!)
Getting into the sky
- You can use the winch
- You can use an ai aerotow (ASK21-menu / Drag robot)
- You can be towed by multiplayer aircraft
This is the first updated version pushed to FGAddon by Thomas Polzer, Viktor Radnai and Bea Wolf. It includes livery support, new pilot models, improvements to the interior, the menu and the FDM. It was released on 3rd January 2017.
In the second updated version V. Radnai and B. Wolf improved the instruments, wind sounds, systems and usability as well as the interior further. It was released on 18th February 2017.
With the help of Gilberto Agostinho, this version will feature very much improved textures as well as a realistic-looking fuselage shader and various other improvements/fixes. It was released on 25th March 2017.
This version contains a highly reworked fuselage/interior model and many bug fixes. It was released on 9 May 2017
This version contains a new JSBSim FDM for the glider and the motorglider variant. Additional changes are an updated radio and an improved Fuel/Payload dialog. It was released on 27th August 2019.