It is used on first stages of the Proton rocket.

The successful maiden flight of a Proton rocket with the new engine was completed in 1995.

Khrunichev's main product is the Proton rocket, which has been launched more than 350 times since its creation in 1968.

It was launched on September 14, 1997 atop a Proton rocket.

Soviet officials have begun an aggressive campaign to get foreign customers for their Proton rockets.

It was launched by Proton rocket on November 26, 2002.

The satellites would be launched 3 at a time on the heavy-lift Proton rocket.

Soviet space officials opened a drive last year to attract foreign customers for the Proton rockets.

At the time, this was the heaviest payload to be launched by a Proton rocket.

Khrunichev's prospects rest largely on the Proton rocket, which was developed in the 1960's.