Thanks! A lot of interestong info and facts. Was i right that a Bush plane can fly 2k miles without refuling?
It would be a massive stretch if possible at all. I would imagine that it would require modification to the fuel system (adding a massive fuel bladder) and that such a trip would be able to be done with only one occupant in the plane. I don't pretend to be an expert on every kind of plane out there, but it sounds a little far fetched. Just to help you understand, let me give you some specs on the planes I am used to flying - Piper Cherokees (in this case a 180HP Archer). The usable fuel on board is 48 gallons. At a rate of 8.5 gal/hr. (which is better than you are likely to get. Usually I get 9-10) that would give just over 5 and a half hours of flying time. Assuming you are doing 125 Knots (which is also a generous number especially if you are flying with passengers), that would give you a range of about 705 nautical miles or about 810 statute miles. Keep in mind that these are likely better than optimal numbers and that you legally have to have enough fuel to fly for at least 30 (during the day) or 45 (at night) minutes past your destination. You would ideally want to have more than that on board.
I don't know anything significant about bush planes but keep in mind that if you have an engine that burns less fuel than what I just mentioned, then it likely flies slower. If you carry more fuel, then either the engine has to be more powerful (and prob burns more fuel) to accommodate the extra weight or you simply wont be able to fit the weight of extra passengers. In the plane I used to fly (a Piper Archer III manufactured in 2000), there was so much avionics that with full fuel you could maybe take one passenger. This is almost like the Seinfeld episode when Kramer and Newman try to figure out how to do the bottle deposits in Michigan.