The Collaborative International Dictionary of English v.0.48:

Volplane \Vol"plane`\, v. i. [F. vol plan['e] act of volplaning;
   vol flight + plan['e], p.p.; cf. planer to hover.]
   (Aeronautics)
   To glide in a flying machine.
   [Webster 1913 Suppl.]

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "volplane":
   acrobatics, aerobatics, aeroplane, airlift, airplane, balloon,
   banking, be airborne, chandelle, crabbing, cruise, dive, diving,
   drift, ferry, fishtailing, flit, fly, glide, hop, hover,
   hydroplane, jet, navigate, nose dive, power dive, pull-up, pullout,
   pushdown, rolling, sail, sailplane, seaplane, sideslip, soar,
   spiral, stall, stunting, tactical maneuvers, take the air,
   take wing, wing, zoom