An Air Force O-1E evaluates the effect of saturation bombing by B-52s on jungle in South Vietnam in 1966.
Hal Lomis flying his Fuji-built L-19 Susui, painted in Japanese Self Defence Force livery;
John Madison's L-19A painted in Civil Air Patrol markings.
Larry Flinn's San Antonio-based Bird Dog.
FRANK MORMILLO’s shot of Paul Vought's Chilly Willy, an O-1F, in formation with Ralph Nelson’s O-1E 52-4551 and the same owner's N88RN Dog Spot.
More than 100 Bird Dog trainers awaiting student pilots at Lowe Army Airfield, Fort Rucker, Alabama, the home of Army aviation.
In its heyday the Bird Dog could climb at a steeper angle than any other lightplane in its class.
A Kentucky National Guard Bird Dog in the glossy green uniform of 1963. The ADF loop antenna and the long FM whip antenna are familiar trademarks of the O-1.
The gas-turbine powered XL-19B, which set a lightplane altitude record of 37,063 ft.
In 1965 Army student pilots flew these multi-coloured (dull orange and olive drab) Bird Dogs on training missions from this bivouac site near Fort Rucker, Alabama.
Further view of XL-19B 52-1804, which shattered the world’s altitude record for its weight category. The aircraft is fitted with a Boeing XT50-1 gas turbine engine of 210 e.h.p., and made its first flight with this engine on November 5, 1952.
A TL-19D, used to train Army pilots and fitted with dual control. The type went into service during the late Fifties.
John Madison's L-19A painted in Civil Air Patrol markings.