All ready done, Daveroo. There is a kit for ferrying the aircraft useing the hopper for an aux tank.This is a commom practice for most ag planes.All though;the seats in the dammed thing will generate terminal 'roids in a matter of moments! It is also common(!) practice to carry loaders/mixmasters out to a remote site in the hopper, although the gate torque shaft,link arms and quantity float make this an uncomfortable trip, let alone the glop clinging to the hopper. You should see and smell BTK, for instance. We have also hauled MOGAS,diesel and heating oil with the aircraft, and use the hopper to carry spares, kit , baggage, mountain bikes and what not when deploying on spray and fire fighting missions. I am not a big fan of the type as an air tanker. It is not a nice aircraft to fly, hard to land, and visibility over the nose sucks. (Tail dragger) The variable flow gate is great for line building, but has no punch for inital attack in any kind of canopy. Its slow, though in Alberta we have used portable bases set up on a road strip to keep in close to a fire.
The airfoil section really penalizes the aircraft. To keep the cost down.Leyland used all kinds of automotive and RV stuff in the electrical and utillity systems, which was endless greif untill it was replaced. Lastly the Sea Tractor/ Sea Cow is short on puff hot and high, has to leave mud or gas on the ground, is a beastly thing to access for maintenance. The floats are missmatched to the aircraft, being wipline Twotter floats with the transom clipped, which has left the step in the wrong place, leading to long take off runs.The wip air float have all the rigging inside the float, making maintenance difficult. Lastly, it only has one engine. The PT6A is s great bit of kit,statisticly only failing every 1.5 zillion hours or so, but it only has to quit once. Not a terribly reassuring thought when you are out over the hard, pointy rocks one finds away from most air fields. But is is cheap, although in the first ten years of ops, we wrote off one WHEN THE ENGINE QUIT.( The pilot walked away, thank the gods.) The 'old' fleet of multi engine Firecats and DC-6's have had one fatal, 20 years ago( the pilot had a heart attack ) and will shut down engines, but will live to fly another day. But it is a very pugnacious looking airplane.
3/7charlie.