the FH-1100 was built to compete in the uS Army scout helo program, the LOH, back in the early 60's, along with the Bell 206 forerunner, and the Hughes OH-6. The OH-6 won, but both Fairchild-Hiller and Bell produced their designs for civil use anyway. All used the Allison T63 engine.
The Hughes won hands down, it was said, due to its excellent low weight, high payload design, and its crisp articulated rotor which gave it great handling qualities.