I am guessing these are TECH questions... if not I will move them to OT

1)  For you pilot types.   Is there a database that lists tall  
structures by GPS coordinates and height ?  Are there designated  
corridors for low flying aircraft ( like an autogiro ) to fly in ?
        Do birds fly at known altitudes or is it chaotic behaviour on  
their part ?   Are there bird detection schemes for aircraft ?

2)  Do any of you fly an autogiro ?  ( and are willing to discuss the  
experience ? )

3)  Do aircraft ever use air bags for the humans ?  Do they ever use  
air bags for the belly or nose of the aircraft ?

4)  Are parachutes ever made to be inflatable ?   That is they open  
using self-contained gas pressure ?  Are balloons ever used as a  "  
return to earth slowly " device ?  What about a balloon designed to  
form a flattened spheroid ?  What about a set of balloons ?

Thanks for any comments

Gus aka POD



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