The largest design of Air Tractor is the AT-802, of which there are about 100 in Australia.
Air Tractor creates a array of agricultural aircraft that have been employed in firefighting missions, such as spraying retardants in tough terrains.
Stephen Holding, the general supervisor of Subject Air, an Australian supplier and operator of the aircraft, states the Air Tractor is normally utilised on the continent for agricultural apps these as spreading fertilizer on significant cropping regions, but this ability also can make it a very good choice as a solitary-motor air tanker for firefighting.
Keeping suggests since the Air Tractor desires to have a enormous load, it has a large electricity-to-body weight ratio. The plane, for instance, has a greatest get-off bodyweight of 16,000lb (7,257kg). “An AT802 can have approximately 3,000 liters of hearth retardant,” stated Holding.
When retardant is dropped on vegetation, it can previous for a couple of months. It dries on the vegetation, forming a layer that retards the development of a hearth, suggests Holding, incorporating that retardant is more productive than foam focus or drinking water gel, some of the other liquids that Air Tractors use to beat fires.
Australia is the driest inhabited continent on earth. The country activities ferocious wildfires in summer time when temperatures often exceed 40 levels Celsius (104 degrees Fahrenheit).
“Air Tractors have two main fireplace-battling roles,” explained Holding. “The first is combating the fires specifically on the frontline. The latter part is known as ‘retardant line building’, where by the Air Tractors perform ahead of the fire to develop up defensive lines and fireplace suppressants around strategic assets.”
He claimed Air Tractor has a computerized fireplace-doorway letting the pilot to pick how significantly retardant to drop and how major of an spot to cover, an particularly important ability for aerial firefighting.
Another advantage of an Air Tractor is its deployment pace and adaptability, Keeping mentioned.
“Compared to massive air tankers, the scaled-down-sized Air Tractor can be deployed quicker. Because it is at first an agricultural aircraft, Air Tractors can function across various sorts of terrain, these kinds of as grass, discipline, gravel and fly from air strips and runways of around 800m length, which tends to make it great for manoeuvring at the scene of a fire,” Holding said.
The largest design of Air Tractor is the AT-802, of which there are approximately 100 in Australia, suggests Keeping. The variant created for firefighting is the 802AF or 802F. The ‘F’ variant also features an amphibious model, the AT-802F Hearth Boss that is equipped with Wipaire floats. There are 12 Fireplace Boss amphibious plane in Australia, according to Holding.
“The AT-802’s wing tanks can keep up to a maximum of 1,476 litres of jet gasoline and burns up to 300 to 350 litres for each hour dependent on many elements like altitude and velocity,” he included.
Because of to its heritage as an agricultural aircraft, Air Tractor is made to do the job in very hot, dusty and tricky environments but the plane also demands a resilient engine to again it up, which is where Pratt and Whitney Canada’s PT6A-67AG and F engine arrives into play. About fifty percent the AT-802s in Australia are fitted with the AG engine and the rest with the F, explained Keeping.
“Many firefighting operators these days with the AG-equipped AT-802 have begun to update this engine to the PT6A-67F variant, which has far more ability and more load carrying ability.”
He mentioned though Air Tractors participate in a function, it is only just one instrument of the fire organizations, and other plane these kinds of as helicopters and significant aerial tankers are also essential.
He also said aerial fire fighters are there to help the groups preventing the fires on the ground. “We are component of an overall method and aerial firefighting is about aiding the resources on the ground.”