Examples from the Web for monoplane
So he skirted the fence and the hedge at the side, and went around three sides of the field to reach the monoplane.The Boy Scouts on the Trail|George Durston
A rod, connecting a warping lever with the right wing of the monoplane, snapped with a sharp crack.
Very business-like the young people looked as they hauled the monoplane up the hill.
All then go to the training camp about 80% for monoplane work, the remainder for biplanes.Jane's All the World's Aircraft|Various
But just before that, the monoplane was poised in the air for an instant above the great falling shape.Secret History Revealed By Lady Peggy O'Malley|C. N. Williamson and A. M. Williamson