In practice that is zero - you are not allowed to take off unless you have enough fuel to fly for an hour after landing. flying is safe in large part because of hard learned rules like this.
I’ve never seen a rule requiring any specific fuel reserve except for when filing IFR where you need enough fuel to get to your destination, and alternate, and still have 45 minutes of fuel.
In practice that is zero - you are not allowed to take off unless you have enough fuel to fly for an hour after landing. flying is safe in large part because of hard learned rules like this.
I’ve never seen a rule requiring any specific fuel reserve except for when filing IFR where you need enough fuel to get to your destination, and alternate, and still have 45 minutes of fuel.
I’m sure that doesn’t apply to ultralights.
that depends on the pilot. it doesn’t apply to bold pilots. There are bold pilots and old pilots - but no old and bold pilots.