Answers to most technical questions can be found in the user manual included with your software.
Answers to other questions may be found below:
What do I get with my 20 Series addon?
Are all the 20 Series systems simulated?
How realistic is the 20 Series addon?
I am an 20 Series fan but a beginner flight simmer? Is the 20 Series addon too complex for me?
Does my 20 Series addon come with a virtual cockpit?
Does my 20 Series addon come with 2D panels?
Is a paint kit available so I can repaint the aircraft?
What is the maximum speed of my 20 Series addon?
What is the maximum altitude than can be reached?
SOFTWARE INSTALLATION AND SETUP
What are the minimum system requirements for installing the 20 Series addon?
How do I install the addon I've purchased?
The installer asks for my product activation key. Where do I find it?
Can I re-download my addon if I lose the original file?
I've installed Flight Simulator X in a custom folder, will the installer detect it?
Is the 20 Series addon compatible with Microsoft® Flight Simulator X?
Is the 20 Series addon compatible with Microsoft® Flight Simulator 2004?
Is the 20 Series addon compatible with Lockheed Martin Prepar3D®?
Is this addon compatible with the latest version of Windows®?
Is this addon compatible with the latest version of DirectX®?
My 20 Series addon has no virtual cockpit. How can this be possible?
After I've installed my new 20 Series addon in FSX, only two 20 Series aircraft variations appear in the Select Aircraft page. Where are the other variations?
AIRCRAFT OPERATION & PROCEDURES
How do I take off and fly my 20 Series add-on?
Can I download a free version of the user manual?
What's the easiest way to start the 20 Series' engines without going through the entire check list and procedures?
Can I use CTRL-E to start the engines?
Why are some of the aircraft systems reset when a new 20 Series aircraft is loaded?
The 20 Series instrument panels appear "frozen" after a new aircraft has been loaded while in flight. What do I do?
Why can't I reach the maximum altitude?
I've just installed my 20 Series addon and loaded my first flight but I cannot see the cockpit. What's the problem?
My 20 Series landing gear won't retract. What do I do?
Some switches in the virtual cockpit don't work when clicked on? Is this an issue?
Some features don't work - The autopilot controls do not work, nor the GPS panel, the AP altitude preset cannot be changed, IFF is not working and not tunable. Help!
Is there a NAV/GPS tracking switch?
I've installed my new 20 Series addon, nothing is working, and I cannot get the engine start by all means on any aircraft. I cannot move the throttle either. Please help!
I have a number of display and performance issues with my new 20 Series addon. Could you help me troubleshooting my problems?
I have another question about my 20 Series addon, can I contact you?
How do I get product patches and upgrades?
I have some ideas about improving the 20 Series or future exciting addons, can I contact you?