3 in 1 model: Tiltrotor, Helicopter and Biplane.
A tiltrotor is a plane with vertical take-off, which can take off as a helicopter, and then turn its blades and fly forward as a plane. The tiltrotor from Lego set 31020 "Twinblade Adventures" resembles the model of the Bell V-22 Osprey. Biplane is a plane with two main wings stacked one above the other. One of mass-produced biplanes is AN-2.