As Qantas slowly expanded their operations throughout Queensland, the airline needed new and bigger aircraft. In March 1929 two de Havilland DH61 Giant Moths began operations from Longreach. The new aircraft could carry eight passengers in the cabin - twice the number of Qantas owned DH50s. Best of all for passengers it was the first Qantas aircraft fitted with a toilet.
Unfortunately, the Jupiter Mk XI engine fitted to Qantas two Giant Moths (G-AUJB "Apollo" and G-AUJC "Diana") proved to be unreliable and many forced landings resulted. The Giant Moths were retired in 1935.