The SR-70 Blackbird, also known simply as the Blackbird, is a jet owned by the X-Men.
The Blackbird is a jet used by the X-Men.
It is kept in a hangar below the Xavier Mansion.
The Blackbird is the X-Men's main mode of transportation.
When Doctor Doom threatened Earth, the X-Men attacked him with the Blackbird. However, at this time Doctor Doom had stolen Silver Surfer's powers. Doctor Doom used the Surfer's power to transmute matter to turn the Blackbird into solid stone which caused it to crash.
The Blackbird was once destroyed when Professor X filled it with explosives and flew it into Master Mold (the leader of the Sentinels) and both the Blackbird and Master Mold blew up. However, Professor Xavier was able to eject just before the Blackbird hit Master Mold.
The Blackbird was later rebuilt. The Blackbird was also upgraded with Shi'ar technology. With this Shi'ar technology the Blackbird could now fly into space.
Magneto once used his magnetic powers to destroy the Blackbird.
In the comics
The jet that would eventually become the X-Men's Blackbird was originally called the RS-150. The RS-150 was built by S.H.I.E.L.D.