US Air Force reaches 'affordable' deal with Boeing on E-7

England: The United States Air Force has reached an "affordable" deal with Boeing for the supply of E-7 Wedgetail airborne warning and control aircraft, senior officials said on Saturday.

The agreement covers the production of prototypes for US requirements as the Air Force phases out E-3 Sentry or AWACS airborne warning and control aircraft and follows reports of disagreements over the price for the 737-based Wedgetail planes.

"We have reached agreement with (Boeing)... We have got a reasonable price point that we can afford," Secretary of the Air Force Frank Kendall told reporters at the Royal International Air Tattoo military air show in western England.

A formal contract will be finalised in August, he added.

The US Air Force is replacing its 707-based Cold War-era E-3s, whose distinctive rotating radar dome allows crew to track targets and direct individual aircraft during a battle.

The transition between the two planes has been delayed amid negotiations over price, raising some concerns in Congress recently about gaps in capability.

"We are very glad to have an affordable basis for the rapid prototyping program, which is the basis for the production programme going forward," Andrew Hunter, assistant Air Force secretary for acquisition, technology and logistics, told reporters.

Boeing welcomed the agreement, which provides a boost to its defence business following a series of cost overruns and delays on fixed-price programmes.

"We are focused on executing well and meeting the needs of our customer," a spokesperson said.