The Atlas H-10 was the prototype for a four-seat cabin monoplane aircraft, registered N37463, designed by Max Harlow, which was flown in the United States shortly after World War II.

The Atlas H-10 had been constructed from the unfinished Harlow PJC-4 sporting monoplane which had been left uncompleted at the outbreak of the conflict.

[1] It was a low-wing cantilever monoplane of aluminum semi-monocoque configuration with retractable tailwheel undercarriage and powered by a variety of engines throughout its life.

Originally powered by a Lycoming O-435, it was re-engined with two Continental O-300s driving contra-rotating propellers through a common gearbox and registered as the Mono-Twin.

In turn, this arrangement was replaced with a Franklin 6AB and finally a Lycoming IO-720, each driving a single propeller.