What fatigue issue? There’s no fatigue issue! How could fatigue possibly be an issue? That’s just the silly ravings of the uninformed!
(Feel free to write me in on the next election.)
The 5- or 6- tank airplanes I’ve flown only allow takeoff and landing on one of them. My understanding is that it has to do, at least in part, with smaller fuel lines that can’t support takeoff power.
To some degree, yes.
If you’re flying your friend’s airplane for hire, it doesn’t matter whether it’s people or cargo, as long as it’s his people or cargo. Taking someone else’s cargo crosses the 135 line.
You're providing the airplane and the pilot for air transportation...that requires an air carrier certificate.
But if he hires you for a local flight to take pictures, that's allowed under 119.1(e)(4)