Plan for biplane design drawn by John R. Duigan in preparation to construct the aircrraft which he first flew on the family property 'Spring Plains' at Mia Mia, near Heathcote, central Victoria, in July 1910.

The drawing shows a wing-end extending from the plan view on the sheet above at the top and a front elevation of the aircraft in its original form, with dihedral wing ends, in the centre of the sheet, drawn to a scale of 1 inch = 3 feet (1:36).

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