The 
TIE Bomber, a fictional spacecraft in the 
Star Wars universe, is a larger, less maneuverable version of the 
TIE Fighter used for destroying larger Rebel ships.  It carries large numbers of torpedoes, but it slow and not very manoeuverable and must be protected by fighters.  Whilst the design was done for 
A New Hope, the craft did not appear until  
The Empire Strikes Back.
All Wikipedia text 
is available under the 
terms of the GNU Free Documentation License