What I find a bit amazing here is that
a) with an instructor on board is appears they were trying to attempt a flight that is 506 NM in a direct line and would simply not be doable in a standard -161, even in perfect conditions (at least not with legal reserves)
Heh, I'm going to make things worse now, not only instructor, but
chief Instructor:
Ratings: ATP, Multi, CFI, CFII, MEI.
Hours: 6800+
Education: Bachelor of Science in Aeronautical Science Embry Riddle Aeronautical University
I'm going to give him the benefit of the doubt though.
Just found this, this is posted on their website about the plane:
Fuel Capacity
Fuel Capacity (Standard Tanks):
Toatal Capacity: 50 gallons.
Total Usable: 48 gallons.
Range Profile
Conditions:
2300 pounds
Recommended lean mixture for cruise
Standard temperature
Zero wind
Proformance @ Sea Level
No Reserve (Best Economy Range)
75% power: 555 NM
65% power: 585 NM
55% power: 605 NM
So my guess is that it was safe.
http://www.silverexpress.com/