The Gregor GR-1, also called the GR-1 Continental and the GR-1 Sportplane was a biplane with a tail-wheel undercarriage developed by Michael Gregor[1] The Gregor GR-1 was intended to be a light, low cost, training aircraft for depression-era customers.
Gregor was based at Hangar B at Roosevelt Field in New York.
[2] The aircraft was a conventional geared biplane with two open cockpits in tandem with oversize interplane struts.
[3] Data from SkywaysGeneral characteristics Performance