Самолеты Granville Brothers
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Аэроплан Model Y Senior Sportster стал развитием основных принципов Model X с установкой двухместной кабины. Были построены две машины этой версии.
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This Model "Y" Senior Sportster (NR11049) had the front cockpit faired over and was flown as a single-seater.
Gee-Bee Model Y Senior Sportster.
This example of the Model "Y" (718Y) shows the tandem cockpits.
Replica Gee Bee Y photographed by HOWARD LEVY
Wikipedia