The one and only Gamma Model 2B was delivered to Lincoln Ellsworth who named it 'the Polar Star.' Ellsworth took the airplane to Antartica aboard a ship in 1934 with the famous aviator Bernt Balchen as his pilot. Ellsworth had planned a round trip flight between the bay of whales and the weddell sea. While still preparing for the flight the ice beneath the polar star broke apart and it was nearly lost. After considerable effort the plane was recovered and loaded back aboard a ship and then subsequently returned to America for repairs. Ellsworth and the Polar Star returned to Antartica in September, however before a flight could be made the plane broke a connecting rod and had to be shipped off once again for repairs.

Finally, after returning once again to Antartica and finding an adequate runway the plane flew over Antartica on January 3, 1935. The following November Ellsworth and canadian pilot Herbert Hollick-Kenyon succeeded in flying the Polar Star across Antartica, becoming the first men to visit western Antartica. The Polar Star made a number of landings on it's journey across Antartica before it was forced down by fuel starvation just 25 miles short of it's transantartic goal. Over 2400 miles had been flown before the aircraft was forced down. The crew abandoned the aircraft and walked the remaining 25 miles to their destination, taking 6 days to arrive. The aircraft was later recovered and donated to the Smithsonian where it is currently on display.