General Aircraft Monospar ST-25


The General Aircraft Monospar ST-25 was a British 1930s light twin-engined utility aircraft.

Design and development

The Monospar ST-25 was a low-wing cantilever monoplane with a fabric-covered metal structure. The monospar name came from the use of a single spar in the wing structure, that had been developed by H J Stieger. The cabin was enclosed with five seats. It was based on the GAL Monospar ST-10, with the addition of a folding seat for a fifth passenger, extra side windows, and the addition of a radio receiver. On 19 June 1935, the prototype made its first flight at Hanworth Air Park. It was designated Monospar ST-25 Jubilee, to honour the 25th anniversary of the reign of King George V.

Operational history

  • The last flying Monospar ST-25, of Piet Van Asch, the owner of New Zealand Aerial Mapping Ltd, was lost in 1986 in a hangar fire.
  • The last surviving Monospar ST-25, an ST-25 Ambulance, was fully restored during 1989–1999, and is now displayed in Egeskov Veteranmuseum at Egeskov Castle, Denmark.

Variants

;Monospar ST-25 Jubilee
;Monospar ST-25 De Luxe
;Monospar ST-25 Ambulance
;Monospar ST-25 Universal
;Monospar ST-25 Freighter
;GAL.26
;GAL.41

Operators