I wonder if you guys can help me with a question i've been pondering a bit recently.
I came across this site
http://www.gozerog.com/ a while back, on which they mention that they've made various modifications to a 727 to use for parabolic trajectory flights.
Now at first I didn't see why modifications would be needed as it's within the flight envelope of the aircraft, but thinking about it more (and doing some research) it seems related to things like engine oil which aren't designed to operate in extended low gravity conditions.. as well as the 1.8g pull out causing fatigue issues. All that said, i'm surprised there aren't more companies offering this sort of flight.
Am I missing some huge technical issue that complicates the issue, or is it a paperwork issue relating to getting a Supplementary Type Cert or similar?
And why a 727?
Cheers
Will