Does the 150 carry a lot less fuel than a 152? I only ask because I did a lot of training on the 152 and it was burning 6 USG an hour giving it 4 hours endurance with 2 POB.
Admittedly a huge amount of
creativity was needed to ensure you were within official Mass and Balance limits for take off when fully loaded. In fact, if my memory serves me correctly, you were well outside limits with 2 blokes and full fuel, but everyone regularly did that, and there was no difficulty getting off the ground even in mid-summer.
