I created all of the concepts shown on this page. You are free to use them for whatever you want. They were originally posted on this website in the 2015-2016 time frame. They were created using PROP_DESIGN, Rhino, and Keyshot.
Using adjustable thrust vectoring nozzles has many benefits compared to tiltrotors, helicopters, and/or quadcopters:
Below is an animation of an adjustable thrust vectoring nozzle of my own design. Four struts were used for added structural stability and strength. The struts were made using the NACA 65A009 airfoil. The struts should be placed ahead of the propeller (CFD and/or testing can be used to find the ideal distance). The ducting does not contribute to the propeller's performance. In this case, the ducting only acts to guide the air into the adjustable thrust vectoring nozzles. No static pressure is developed. Thus, tight tip clearances are not needed. The blades have the same chord as the struts. The blades use the same airfoil as the struts. The engine can be an electric motor, piston, or turboprop.
Below is a low speed surveillance drone concept. The adjustable thrust vectoring nozzles are the same ones shown above. Moreover, the yellow nozzles rotate 360 degrees. The white pods, that support the adjustable thrust vectoring nozzles, would also store batteries and/or fuel and act as the landing gear. Cameras are located in the black sphere.
Below is a high speed drone concept. It would cruise at and altitude of 32,000 ft and a speed of Mach .7. It can takeoff and land vertically. It can also hover in place. The adjustable thrust vectoring nozzles are the same as those featured previously. However, the inboard nozzles have their rotation limited to 180 degrees. Using adjustable thrust vectoring nozzles negates the need for thrust reversers. The blades, struts, and wings use the NACA 65A009 airfoil.
This is a hovercar concept I have drawn by hand since I was in middle school. I modeled the concept in clay, when I was a child, to verify the perspective views. I finally got a chance to model it in CAD.
Wanting to understand how to create hovercars is what led me to getting a degree in Mechanical Engineering. I did learn how to create hovercars. Unfortunately, they are not practical for a number of reason. They do look cool, however, as evidenced by the photos below.
The concept shown uses six electric ducted fans. Four of the EDFs feed four plenum chambers. Two EDFs provide thrust and steering. The occupants face each other, one seat faces forward and one faces backward (the interior wasn't modeled). There is no trunk or engine compartment. Storage bins are located behind the seats, accessible from the interior. The wheel wells act as plenum chambers. Clear glass encloses the wheel wells, in the renderings. These would be LED screens in reality. You could show different colors, graphics, or animations, on the screens.
The car drives itself. In the 80s, when I first started creating this concept, self driving cars were not possible. It's nice to see that they are starting to become a reality.
The inspiration for the shape of the hovercar was from the following vehicles:
Below are renderings of the fans used in the hovercar concept. Four struts were used for added structural stability and strength. The struts were made using the NACA 65A009 airfoil. The struts should be placed ahead of the propeller (CFD and/or testing can be used to find the ideal distance). The ducting does not contribute to the propeller's performance. In this case, the ducting is only needed to guide the air into the diffusers. Because static pressure is built up in the diffusers, tight tip clearances are not needed. The blades have the same chord as the struts. The blades use the same airfoil as the struts.