Our club a/c - an LSA / Microlight - has two fuel selectors on the centre console, both must face forward for ON ( everything forward for speed ! ) and be turned 90 deg across the console for off.
The left tank sucks faster than the right, so we usually turn the left one off for periods, partly to balance fuel left to right, but also to ensure that there is fuel in the left tank for the overshoot - nobody has had the courage to let the left tank run empty, to prove that the engine won't suck air momentarily ( I know, I know, but Murphy is always hiding just behind the hedge looking for a laugh )
Another club, same type, taught a student to do just the same, so downwind he knew he had to switch back to both tanks ON, and that he had to 'match' the fuel selectors , so he did - across the console. Murphy won. We now have 2 very large arrows painted on the console - facing forward !
