# Vehicle Selection
PX4 supports air, surface, and submersible vehicles. You can see a full list of the vehicle types and variants ("frames") that have been tested/tuned for use with PX4 here: Airframe Reference.
Select the frame based on what you need it for:
- Multicopters offer precision hovering and vertical takeoff, at the cost of shorter and generally slower flight. PX4 has modes that make them easy to fly, and they are the most popular type of flying vehicle.
- Helicopters similar to Multicopters, mechanically more complex, but more efficient.
- Fixed-wing airplanes offer longer and faster flight, and hence better coverage for ground surveys etc. However they are harder to fly and land than multicopters, and aren't suitable if you need to hover or fly very slowly (e.g. when surveying vertical structures).
- VTOL (Vertical Takeoff and Landing) aircraft come in a number of types: tiltrotors, tailsitters, quadplanes etc. They offer the best of both worlds: take off in vertical mode like a multicopter and then transition in forward flight like an airplane. They are often more expensive than either multicopters and fixed-wing aircraft, and harder to build and tune.
- Airships/Balloons are lighter-than-air vehicles that typically offer high altitude long duration flight, often at the cost of having limited (or no) control over speed and direction of flight.
- Rovers are car-like ground vehicles. They are simple to control and often fun to use.
- Boats are water-surface vehicles.
- Submersibles are underwater vehicles.
The airframe settings used by PX4 are configured in QGroundControl during initital setup: Airframe setup.