The original "H" Class design of 1919 was for a twin engined airship of approximately 80,000 cubic feet volume.

After test flights at the Goodyear blimp facility at Wingfoot Lake, H-1 was shipped to Rockaway in May 1921.

During the summer of 1921, H-1 completed six flights and, on its seventh, a hard landing pitched the crew out of the control car.

H-1 free ballooned as far as Scarsdale, New York where a farmer was able to grab the rip cord and tie the blimp down.

The OB-1 was damaged on 6 October 1923 and never flew again as the forthcoming TA type airship would meet the training role.