It was the first manned mission, launched in April 24, 1967. The launch was a success, but there were tribulations shortly afterward. A solar panel on Soyuz 1 failed to unfold. Because of this, the spacecraft’s systems experienced a shortage of power. Maneuvering the spacecraft also failed, because of problems in the orientation detectors.
A second Soyuz vehicle was scheduled to be launched the next day, to provide an EVA (Extra-Vehicular Activity) for Soyuz 1. The crewmembers, Valery Fyodorovich Bykovsky, Yevgeny Vassilyevich Khrunov, and Aleksei Stanislavovich Yeliseye, planned to repair the solar panel of Soyuz 1. Unfortunately, heavy rain at Baikonur made the launch impossible, so the Soyuz 1 spacecraft was deorbited as soon as it orbited above the USSR again. It was possible for cosmonaut Komarov to land safely, but the main parachute did not open, due to problems with a pressure sensor. To make things worse, a manually deployed reserve parachute tangled, and the spacecraft fell into the earth at a speed of about 40 meters per second (145km/h). The impact resulted in a huge explosion, and the capsule was engulfed by fire. Cosmonaut Komarov died on impact.