Cosmos 110

The Voskhod-3KV was a Soviet unmanned spacecraft based closely on the Vostok-3K capsule. It was capable to carry crews of up to three cosmonauts on crewed missions. The basic difference to Vostok was the elimination of the ejector seat to make room for two cosmonauts in spacesuits or three without spacesuits. To soften the landing, a solid fuel retro rocket was incorporated. Also a solid fuel back-up retro rocket system was carried in front of the spherical reentry capsule. Cosmos 110 was an unmanned long duration flight carrying two dogs (Veterok and Ugolyok). The capsule with the dogs returned safely after 22 days in orbit. It was a test for the cancelled manned long duration flight Voskhod 3.