Of all the slim-tailed small helicopters, only the UH-12 has a bent-up tail boom braced with a spar running from just below the main rotor to the top of the tail.

The original UH-12 (designated Hiller 360) was the military's H-23 "Raven." Out of production for a decade, it has been revived, and many UH-12s now have turboshaft engines. The UH-12 is used primarily as an agncultural sprayer and seeder.