Bear-H.

This is coolbert:

As with the American B-52 bomber so too with the Soviet era long-range bomber Tu-95!

"More Power for the Mighty 'Bear'"

"The Tu-95 'Bear-H' is getting more power through the latest incarnation of the Kuznretsov NK -12 turboprop"

"ODK [United Engine Corporation] is also working on the NK-12MPM, a further development of the NK-12 turboprop series, with the intention of installing it in the Tu-95MS 'Bear-H' strategic bomber. According to a recent statement by ODK’s parent Rostec corporation, the improved engine gives a boost in take-off performance and payload-range capability . . . To cope with the extra power, the Aerosyla company is working on a redesigned AK-60T propeller that would replace the AV-60K and halve vibration levels."

THAT TU-95 A PROTOTYPE [?] HAVING FIRST FLOWN IN 1952.

Regarding the engine NK-12MPM and the need for new propellers: 

"The Tu-95 is one of the loudest military aircraft, particularly because the tips of the propeller blades move faster than the speed of sound."

I suspect the Bear and B-52 both one day might even have a centenary celebration!

coolbert.