volplanes

A leap of three antlered forms, twelve grey legs flashing in the air, a bump of the light sled that volplanes an instant in a shower of snow, a quick leap and a grab for position back on the sled, the thrilling act is over, and the Eskimo has not shown a sign of excitement in his Indian-like stoic face.

The History of the American Expedition Fighting the Bolsheviki Campaigning in North Russia 1918-1919 Harry H. Mead

First his coming down is like that of an aeroplane, in spirals, but a thousand feet from his prey he volplanes; he falls like a rocket, and seizing a fish in the air, he wings his way again to the clouds.

White Shadows in the South Seas Frederick O'Brien 1900

Flying Fish, with pectoral fins used as volplanes in a great leap due to the tail.

The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told J. Arthur Thomson 1897

a given spot and without the use of his motor, from an altitude of from eight hundred to one thousand metres, losing height in volplanes and serpentines.

High Adventure A Narrative of Air Fighting in France James Norman Hall 1919