17 B-1B Lancer bombers.
The B-1B bomber fleet would drop from 61 aircraft in 2020 to 44 in 2021, all of which are in the active-duty Air Force, according to budget documents.
The Lancer, which is no longer capable of carrying nuclear weapons, doesn't have the highest ceiling of the Air Force's bombers, but it is considered the bomber fleet's "backbone," as it can fly the fastest, topping 900 mph, and carries the largest payload, up to 75,000 pounds of guided and unguided weapons.
The service plans to get rid of the oldest of the B-1Bs, which have required more attention from maintainers given the high operational tempo the bomber has faced in recent years.
44 A-10 Thunderbolt ground-attack aircraft.
The Air Force has flirted with retiring some A-10s for years, and its 2021 proposal would finally cull that fleet, with the Air National Guard losing 39 and the Air Force Reserve losing seven. (The active Air Force would gain two, for a total of 44 A-10s removed from service.)
The Air Force currently has 281 A-10s and recently finished putting new wings on 173 of them. Boeing got a billion-dollar contract in 2019 to finish re-winging the A-10s that needed them.
Once those 44 aircraft are removed from service, the Air Force will proceed with re-winging those that remain, an Air Force spokeswoman told Military.com.
16 KC-10 and 13 KC-135 aerial refueling tankers.
The Air Force's 2021 budget proposes dropping 16 KC-10 tankers from the active fleet and eight and five KC-135s from the active fleet and the Reserve, respectively.
KC-10s date to the 1980s and KC-135s to the 1950s. The Air Force says the ones that would be removed would be the oldest and least capable in the force, according to Air Force Magazine, but the cuts would come as the tanker meant to replace them, the KC-46, is still at least three years away from being able to deploy.
The 2021 budget includes nearly $3 billion for 15 more KC-46 tankers, as well as an additional $130 million for modifications and research, and development, testing, and evaluation.
Air Force officials have said they want to hold on to legacy tankers until the KC-46 is working properly. The head of US Transportation Command, which oversees aerial refueling operations, said in January that KC-46 delays risked causing "a real dip" in the military's tanker availability.
24 RQ-4 Global Hawk surveillance drones.
Starting in 2021, the Air Force wants to divest its Block 20 and Block 30 RQ-4 surveillance drones, a total of 24, leaving only its 10 Block 40 RQ-4s.
Four of the Block 20s had been converted to Battlefield Airborne Communications Nodes, which allow different battlefield communications systems to talk to each other.
To replace the RQ-4s with the BACN (which makes them EQ-4s), the service will get five E-11As with the BACN system, buying one a year starting next year, an Air Force spokesperson told Defense News.
The RQ-4 often works in conjuction with other space-based and airborne information-gathering aircraft, like the U-2 spyplane, whose future was also put in doubt by the latest budget documents.
24 C-130H Hercules airlifters.
The Air Force also wants to retire 24 C-130H mobility aircraft from the Air National Guard.
The C-130H airlifter, as well as the MC-130H used for special operations operations, are among the oldest in the Air Force and "are experiencing airworthiness, maintainability and operational limitations," according to budget documents.
In the 2021 proposal, the active force would lose three MC-130Hs and gain four MC-130J, the next model, while the Air National Guard would acquire 19 C-130Js
