Fighta-Bommas are a class of combat craft that function as both atmospheric craft and as spaceships. The are generally well-armed, but too small to have an onboard Hyperdrive. They rely on larger spaceships like Kill Kroozers and Rok-class asteroid ships to carry them through Hyperspace or on Jumpgates.
Fighta-Bommas rely mostly on nuclear fission or fusion or on chemical-thrust engines, although a rare Fighta-Bommas might be powered by gravity-control technology. Most Fighta-Bommas are fairly inexpensive craft to manufacture and maintain because they are relatively low tech.
The Fighta-Bommas class was first used by Orks, but non-Ork races have adopted the design.