“Pratt 720” testbed on long(?) mission:
Good catch!
It originally filed for 10+ hours (or maybe that was a FlightAware b… oops, I mean enhancement 
). 5 and half is more reasonable.
I remember years ago this same plane made our local paper ( The Glengarry News ). It circled the country side just north of us for hours, many people phoned the OPP thinking the plane was in trouble.
I guess P&W figured no one lived in Eastern Ontario.
Today PWC720 seemed to take a very great interest in the coastline of Maine.
flightaware.com/live/flight/PWC7 … U/tracklog
Here is a screen capture:
i45.photobucket.com/albums/f51/j … -Pratt.png
I guess for plane that looks as odd as this one, I shouldn’t be too surprised by its odd behaviour.
Anyway, thought I’d share.
It appears he was down to 1000 ft on that test flight on the coast.
On this one:
flightaware.com/live/flight/PWC7 … /CYHU/CYHU
flightaware.com/live/flight/PWC7 … U/tracklog
he’s up to 45000, quite a range on that old girl. 
I have been in this plane. Back in 1997. It’s an ex-MEA airplane and I think the present callsign is Pratt1.