(
opex360, mar.29)
The US Air Force is considering abandoning the AGM-183A hypersonic weapon after an unsuccessful [mixed results] test
Developed by Lockheed-Martin, the AGM-183A hypersonic weapon [or ARRW for Air Launched Rapid Response Weapon] consists of a propellant that, when launched by a B-52H Stratofortress strategic bomber, should enable a manoeuvring glider known as a TBG [for Tactical Boost Glide] to reach a speed of over Mach 5.
However, the AGM-183A failed several times in its early testing, either because the launch sequence from a B-52H Stratofortress strategic bomber had to be aborted or because the booster failed to ignite. This gave it bad press in Congress, to the point where Congress threatened to halt its development. However, the programme was put back on track... to the point of ending 2022 on a high note, with the successful testing of an 'operational' version of this hypersonic weapon.
However, on 13 March, a new test of an operational AGM-183A produced mixed results. Firstly, the US Air Force assured that "several" of the objectives had been achieved. This means that not all of them were achieved. Did they want to minimise the consequences, knowing that another failure would be fatal to the programme?
However, Air Force Secretary Frank Kendall admitted that the last AGM-183A test had "not been a success" because "we didn't get the data we needed". And while he did not rule out further testing - the US Air Force still has two examples to launch - he said the priority would now be on the HACM [Hypersonic Attack Cruise Missile], a programme to develop a hypersonic cruise missile.
"We are more committed to the HACM at the moment than to the ARRW," Mr Kendall told a parliamentary hearing. Especially since the programme has been "successful" and the missile that comes out of it will be "compatible" with more US Air Force aircraft. "It will give us more combat capability overall," Mr Kendall argued.
Launched by DARPA [the Pentagon's innovation agency] and the Air Force Resarche Laboratory [AFRL], the HACM is based on a hypervelocity missile powered by a supersonic combustion ramjet. It is the continuation of the "HAWC" project [for Hypersonic Air-breathing Weapon Concept], for which the Lockheed-Martin/Aerojet Rocketdyne and Raytheon/Northrop Grumman tandems each proposed a solution. The latter was selected by the Pentagon.
As for the AGM-183A, its future will depend on the analysis of its last test... and the results of the launch of the two examples owned by the US Air Force. A decision will be taken in 2025. But in the meantime, budget documents suggest that its fate is all but sealed, as the funds allocated to its development have been practically divided by three in 2023 [$115 million compared to $308 million for the previous year]... while those for the HACM have increased again, to $423 million. Moreover, the Pentagon intends to spend 1.5 billion dollars on it between 2025 and 2028. /deepl