Can anybody help me by explaining what attribute/setting distinguishes a hidden aircraft from one that is visibile.I've read the Aircraft container SDK doc, and I can't see what distinguishes the Dash 8 (hidden) from lets say the Cessnas.Finally, are there any sites that offer further info/docs etc. on this issueThanks in advance :)

They really aren't hidden, they are just originally AI Only. You can change that by assigning a panel and sounds then edit the *.air file and change record 105 (Aircraft type) from 2 (AI) to 0 (Normal).

Thanks.I will have to try that out