THE US Air Force’s ambitious next-generation fighter jet programme, envisioned as a revolutionary leap in technology, could become less ambitious as budget pressure, competing priorities and changing goals compel a rethink, defence officials and industry executives say.

Initially conceived as a “family of systems” centred around a sixth-generation fighter jet, the Next Generation Air Dominance (NGAD) programme is meant to replace the F-22 Raptor and give the United States the most powerful weaponry in the sky well into the mid-21st century.

When it was first proposed, expectations were high, including an unmatched stealth capability to keep it invisible from even the most sophisticated radar, laser weapons and onboard artificial intelligence to process masses of data coming from the latest in sensor technology.

However, sources said the current development budget of US$28.5bil over five years ending in 2029 could be spread out over more time or scaled-back as the Pentagon searches for a cost-effective solution.

Sources briefed on the Air Force’s internal budget deliberations said the anticipated 2026 fiscal-year NGAD budget of US$3.1bil would be slashed as funding shrinks, with one source adding that diminishing funds could stretch development by two more years.

While it is unclear how much the overall programme will cost, it could eventually total well over US$100bil if 200 aircraft are produced, including initial costs - plus maintenance and upgrades over time.

There are currently 185 F-22s in service - the plane NGAD is meant to replace.

The Air Force is also reviewing the concept for the jet - perhaps moving to a larger single-engine jet, from what is believed to be a two-engine design, or even shifting more funding to a less expensive unmanned drone to best address future air superiority needs given the potential budget cuts, industry experts said.

“NGAD was conceived before a number of things: before the threat became so severe, before the collaborative combat aircraft (CCAs) drone programme were introduced and before we had some issues with affordability that we are currently facing,” Air Force secretary Frank Kendall said last Saturday at Britain’s Royal International Air Tattoo, the world’s largest military air show.

“Before we commit to the 2026 budget, we want to be sure we are on the right path,” he added on a programme that will be a popular talking point at the Farnborough International Airshow this week.

The shift in focus comes as the Air Force grapples with substantial cost overruns in several vital, and expensive, programmes. For example, its Sentinel intercontinental ballistic missile (ICBM) programme, which is set to replace the ageing Minuteman III missiles, has ballooned 81% over budget, to around US$141bil.

Budget pressure has forced the Air Force to reassess its spending priorities across various modernisation efforts which also include increasing production of the new B-21 bomber made by Northrop Grumman.

US aerospace and defence companies Lockheed Martin and Boeing have responded to the Air Force’s request for proposal for the NGAD system, sources said.

While defence firms are not exactly desperate for orders with conflicts in Ukraine and Israel driving already-strong demand, NGAD was one of several potentially giant programmes many hoped would feed the bottom line in the years ahead.

An Air Force spokesperson told Reuters the department is currently building its fiscal 2026 budget which will be released early next year. Representatives for Boeing did not return requests for comment. Lockheed would not comment on NGAD.

“The part that seems to be getting stalled and re-evaluated is the air vehicle itself, the central platform,” said J.J. Gertler, a senior analyst at aerospace and defence analysis firm the Teal Group.

 - Reuters