The term VTOL basically describes a movement concept in UAVs (unmanned aerial vehicles). It’s an acronym for Vertical Take-Off and Landing. VTOL points out to the aircraft with the ability to take off, hover and land vertically. VTOLs are efficient as it’s a combination of forwarding air travel of a fixed aircraft and the vertical flight of multirotor aircraft. This blend of the techniques provides the best solutions with such optimal characteristics.


Danaero is an advanced system developer and integrator and is always ready to serve its customers. It has been successful in many of the critical missions. By leading the innovation in the industry, it provides quick and comprehensive solutions for different customer needs. With the help of its wide technical expertise, its ability to rapidly design efficient VTOLs. Not only design but also integrate, deploy and support these systems. Danaero is providing all the solutions from Airborne data gathering to processing, exploitation, dissemination of information.

Advantages Of VTOL

As VTOL blends the advantages of both multirotor and fixed-wing aircrafts, it’s greatly flexible and adaptable.

Some of its evident features are listed here:

  • The capability to float constantly
  • Ability to smoothly take off and land in heavy winds
  • Structured maneuverability
  • It takes less horizontal space to launch a VTOL as compared to a fixed-wing aircraft. Because the later one requires a wide open area or a runway.
  • It has higher speed to capture results in comparison to a multirotor drone. It means that you can lessen the time for each project.
  • VTOLs can tilt to a specific level to compensate for the wind. It ensures maximum stability for the aircraft. Also, makes it safe during take offs and landings.

Drawbacks Of VTOL

After mentioning its advantages, we must recognize the main drawbacks of VTOL as well.

  • VTOL are slower as compared to manned aircraft so it offers less coverage.
  • It requires a certified operator who must be licensed for powered lift platforms.

Choosing The Best VTOL For Surveillance

While planning your aerial surveillance or mapping project, most important decision is to choose the right drone.

Let me give you a detailed comparison of two VTOL drones below.

The Two Kinds Of VTOL Drones: Tailsitter Drones VS VTOL Quadplanes

The quadplane is a blend of fixed-wing and multicopter aircraft. It’s appearance is like that of a traditional plane that has additional rotors which let it take off and land vertically. Most simple quadplane has 4 extra rotors set up in the same way as a quadcopter. That’s why its name is quad plane. These rotors are either attached to the wings or to the body in addition to the quad planes forward flight propellers. They can rotate to change the quadplane from floating to forward flight mode. No matter what the rotor configuration is, a quadplane will always take off and land on it’s belly. On the other hand, a tailsitter just like its name, takes off and lands on its tail. Once it takes off, the whole system tilts because of its transition from hover to forward flight mode. After that, it flies just like a fixed-wing drone. However, additional rotors aren’t required because a tailsitter uses the same rotors for hover and forward flight modes.

  1. Fewer Instruments Saves Tailsitters From Failures

A quadplane has the ability to hover but it also comes at a high cost. Quadplanes are complex as compared to tailsitters because the later ones are made from less parts. For instance, need additional actuators so that it can move from hover to forward flight mode. The additional weight of actuators makes energy requirements for a quadplane drone, thus reduces its efficiency. Also, more parts on a quadplane means more chances of a mechanical failure. The chances of failure increase even more when human error happens in assembling before each flight. However, a tailsitter drone tilts in the air to achieve transition and uses the same rotors for this purpose. Its design doesn’t need any extra parts and thus saves the weight. It allows a tailsitter to carry a high quality aerial mapping camera with lots of stability.

  1. Easy Assembling And Transportation Of Tailsitter Drones

A person can easily assemble the tailsitter drone in just five minutes and saves time and resources on the operation. The tailsitter drone comes in one piece along with a middle stand that needs to get snapped into the body. Unlike quadplane it doesn’t need so many parts to be assembled and the procedure is quite simple. Tailsitters are smaller in size and weigh less than the quadplanes. So it’s easier to carry, handle and transport these drones. Only one person is enough to transport tailsitters over long distances. On the other side, a quadplane with two propellers will need two persons for carrying or handling it. It doubles the requirement for staff and that has an impact on the overall cost of the project.

  1. Tailsitters Are Less Complex, light Weight, Less Harmful For Environment

Although it’s not so desirable to discuss this topic, but we have to admit the fact that drones do crash. In that case, a major concern of the drone operator is environmental safety. Once more, tailsitters drones have an advantage over the quadplanes – safety. Fewer parts make tailsitters lighter and much safer from unexpected crashes during landing.

  1. Tailsitters Promises A Great Value

Having only 4 actuators tailsitter are quite small and lighter for a specific payload. Because of less actuators, the reliability is high because the chances of failing components are also lower. If a crash landing happens, the lighter drone with fewer components will cause less damage to the environment. Because of the small size, one person is enough to handle the system and saves you the personnel costs.


The decision of choosing a drone depends on the different requirements of your aerial survey. These requirements can include image resolution, level of accuracy, the specific application and coverage. Cost of the surveillance also plays a vital role here. You don’t just have to think of the initial cost, but also the support and maintenance costs needs to get considered. As the drone won’t be just operated for one time, so it will need constant training and maintenance during its lifetime.

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