I always check fuel duration immediately after takeoff, found the LA5 had 27m of endurance on the deck at 100% mil, but on cruise settings that extends to over an hour. Cruising into and out of the engagement areas I had about 5m of fuel remaining when I landed the first time, after about a 10m fight and maybe 10m of loitering. Seemed sufficient for us up north, although some people had problems, but that was part of the design intent I believe, to limit the Russians ability to remain on station the entire frame.