Abstract: A single-tilt-rotor VTOL airplanes have a tiltable rotor attached to an elongated power pod containing the collective and cyclical pitch mechanism, and transmission. The power pod is pivotably attached to a base that is slidably mounted on a pair of slotted guide beams attached on top of the roof of the fuselage. The guide beams run longitudinally from the front of the aircraft to past the center of gravity (CG) of the aircraft in order to transport the power pod from the front section to the center section when converting from the horizontal cruising mode to the VTOL mode. In the horizontal cruising mode, the power pod perched horizontally on top of the fuselage front section with sufficient clearance for the rotor to rotate in front of the aircraft.

Abstract: A center tracking motor vehicle having two wheels arranged in tandem along the longitudinal axis of the vehicle, and which includes a supporting frame and a body completely enclosing the occupants. The vehicle is stabilized at slow speeds by a pair of outrigger struts and retractable wheels mounted on both sides of the vehicle at its mid-length, and they are tucked within the width of the body during normal operation. The outrigger struts may be swung outward to increase the outrigger wheels track width when necessary in adverse weather or road condition, and they are also capable of lifting the vehicle upright should it fall flat on its side.