Russia is developing this answer to the newest Air Force bomber
With the announcement of the B-21 Raider, the United States has begun the process of developing a replacement for the B-1B Lancer and the B-52 Stratofortress. But the United States is not the only country looking for a new bomber. Russia wants to get one, too.
According to a Facebook post by Scramble Magazine, the Tupolev design bureau is making major progress on the PAK-DA program. PAK-DA stands for, "perspektivnyi aviatsionnyi kompleks dal'ney aviatsii," which is Russian for, "prospective aviation complex for long-range aviation."
The magazine noted that Tupolev has reportedly already delivered a number of production models, including smaller-sized replicas for wind-tunnel tests and a full-scale mock-up. The PAK-DA will reportedly be a flying wing design similar to the B-2 Spirit, which first flew in 1990, with advanced features, like stealth technology and carrying all of its weaponry in internal bays.
According to Russian news, the Kremlin sees this as a potential replacement for the Tu-95 "Bear," Tu-160 "Blackjack," and Tu-22M3 "Backfire" bombers in service. Some estimates speculate that Russia is planning to introduce the plane into service as early as 2025, while others estimate 2030. The B-21 Raider is expected to have an initial capability in the 2020s, according to a 2016 Air Force release.
However, the upgraded Tu-160M2 version of the Blackjack will enter serial production in 2020, with the first flight scheduled to take place this year. 50 Tu-160s are on order for Russia, according to World Air Force 2018. The document also notes that the Russian Air Force has a total of 68 Tu-22M3 Backfires, 42 Tu-95 Bears, and 16 Tu-160 Blackjacks currently in service.
Compare these numbers to the United States Air Force's bomber count. The USAF has a total of 75 B-52H Stratofortresses, 60 B-1B Lancers, and 20 B-2 Spirits on inventory. The Air Force plans to order 100 B-21s.