The Beech Super King Air 350 has been a special airplane since its inception with its enormous useful load, big cabin and certification in the tougher commuter category. But the new ER (extended range) version is truly designed to fly a unique mission profile.
Bottom line, the 350ER has a maximum takeoff weight of 16,500 pounds, 1,500 pounds higher than the standard King Air 350. That extra takeoff weight allows the 350ER to pack on another 1,581 pounds of fuel for a total capacity of 5,192 pounds. Since we pay by the gallon, that is 775 gallons at the pump.
The 350ER could just as easily be called an SP for special missions, because that is what the airplane is designed to fly. An obvious special mission for an airplane with such fuel capacity is observation where loitering aloft with a big load of sensors is the goal. The 350ER can easily stay on station for more than 12 hours.
Another reason people will want a 350ER is to reach destinations where fuel simply isn´t available. You could fly the big turboprop into rugged, out of the way runways to deliver or pickup people or cargo and have enough fuel to make the return trip to civilization.
Of course, there may be some pilots and owners who simply want to go a long way without stopping, and the 350ER can cover more than 2,400 nm at high-speed cruise. In many parts of the world there are simply not good options to stop for fuel because of big bodies of water, hostile terrain or even hostile populations, and the 350ER can bridge those gaps.
These days there is another reason to consider the 350ER—fuel prices. When you find a bargain in fuel, either at your home base or elsewhere, you want to fill up at the good price and take it with you. The very high maximum landing weight of 15,675 pounds means that you can land and depart again after only a very short trip with full fuel. You could make several hops on the cheap fuel or one short leg followed by a very long one with no need to refuel.
The relatively easy part of transforming the regular King Air 350 into an ER was putting fuel tanks in the aft part of the nacelle behind each engine. That space was generally available because it was used only for extra luggage space, particularly to carry long items such as fishing poles or skies. The new nacelle on the ER humps up a bit aft of the engine to make room for the added fuel and that is one of the few outwardly visible signs that separate it from the standard airplane.
The harder part was beefing up the landing gear to carry the extra weight. And all of those changes had to be tested statically, and in flight, to make sure the famously strong King Air airframe could take the load. And then Beech test pilots had to collect performance data at the new higher weights to show that the airplane meets commuter category takeoff requirements that demand minimum climb gradient if an engine fails on takeoff. The regular 350 also meets the strict takeoff safety requirements, but the other King Air models weigh less than 12,500 pounds for takeoff and are not subject to the same rules. Pilots can consult the airplane manuals in the smaller airplanes and observe weight and runway limits that assure engine-out takeoff margins, but it is not required as in the 350 family.
Read the full article at www.flyingmag.com
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