The U.S. Forest Service announced Monday that it has selected contractors to provide seven air tankers that fly faster and drop a larger volume of fire retardant than other planes in its firefighting fleet.

The agency will spend nearly $160 million over five years for access to several models of aircraft, including a converted DC-10 jumbo jet, which can carry about five times as much flame-resistant liquid as any aircraft in regular use.

Each of the planes can carry more than 3,000 gallons of slurry and fly faster than 350 mph, the Forest Service says. The DC-10 can hold as much as 11,600 gallons.

The newer planes are set to join the aging fleet of eight large tankers, mostly Korean War-era submarine chasers, known as PV2s, which can fly about 165 mph and hold about 2,000 gallons of fire retardant. Several such planes have been involved in fatal crashes recently, reducing the size of the fleet.

The contracting process faces several hurdles before approval. And Forest Service Chief Tom Tidwell said in a statement it is “critical” to complete the effort “as quickly as possible as we face the prospect of another challenging wildfire season with a dwindling legacy air tanker fleet.”

From The Statesman Journal: https://www.statesmanjournal.com/viewart/20130507/NEWS/305070012/Feds-add-bigger-faster-planes-fire-fleet