170/170
5000 lbs first hour
4000 lbs each additional hour
.82 to .78 big diff in burn. .78 to .74 also big diff but not as much as .82 to .78. On 90% of our flying (US Air system) the diff in time from .78 to .74 is maybe 3 to 5 minutes per leg. May as well do .74 on routes less than 500 nm. No diff in time but noteable diff in fuel, say 300 to 400 lbs.
5000 lbs first hour
4000 lbs each additional hour
.82 to .78 big diff in burn. .78 to .74 also big diff but not as much as .82 to .78. On 90% of our flying (US Air system) the diff in time from .78 to .74 is maybe 3 to 5 minutes per leg. May as well do .74 on routes less than 500 nm. No diff in time but noteable diff in fuel, say 300 to 400 lbs.