Propellers are the blades that are connected to the drone motors. When motors are provided the right amount of power, they rotate and so too the propellers at a high speed. As the propellers spin, they coerce the air to move downwards towards the ground; thereby varying the air pressure above and below the propellers, creating the necessary lift and setting the drone to go whizzing through the air.
Tip Avoid Drone Injuries
The number and size of the propellers is determined by the size and weight of the drone itself. Moreover, the required speed at which the propellers must rotate to produce the requisite lift is also dictated by the drone’s profile. The drones of smaller size and stature, sport propellers that are small, soft and do not spin at a speed that is comparable to their large sized counterparts. Hence, while they may not be a huge security risk to people around you, care should always be taken to minimize the risk of injury to humans as well as animals in the surroundings.
Having said that, drones of larger sizes contain propellers that are larger and consist of a sturdier material such as hardened plastic or carbon fiber. So, they pose a safety risk to everyone near and around you when you are flying a drone and can result in drone injuries. If one gets hit by a rotating propeller from the Parrot’s AR 2.0 or the DJI’s Phantom 2 drone, there is a high probability of severe drone injuries. This could result in you getting flesh wounds and based on the extent of impact, one can end up in need to stitches or even surgery in some dire cases. Just search on Google with the keyword Dorne Propeller Injuries and religiously go through all the images that are displayed, to know how bad can it get.
We shouldn’t have to remind you this time and time again that you are not to stick your hand, foot or any other part of your body in the path of rotating propellers. Propellers are a primary component of a drone. One cannot cover them completely since they need to move freely enough so that they are able to stir the air surrounding them in order to create the requisite lift. There are a number of security measures that are integrated at the time of manufacture while one can also add more of them into his/her machine to reduce the chances of drone injuries.
Propeller Guards and Protective Hulls
Entrenched market leaders in the drone industry such as DJI and Parrot integrate a number of safety precautions into their devices. The famous DJI Phantom series includes drones that come with propeller guards so that the likelihood of drone injuries resulting from side impacts is greatly reduced. By some unfortunate turn of events, while your drone is about to takeoff, a strong wind can always direct it towards you or someone else standing in the vicinity. This could result in fatal injuries. The propeller guard has been designed specifically to provide safety from this kind of scenario.
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Parrot decided to up the ante a bit more and designed a protective hull that can be attached to the drone and transforms it into an unmanned aerial bumper car. The hull consists of styrofoam and hence very negligible amount of weight is added to the drone. But it does its duty rather well and provides a great additional layer of security.
You should note here that since the direction of airflow is from the top to the bottom of propellers, hence it is not possible to wrap them up completely. Logically sane people should not endeavor to stick their fingers in between the spinning propellers and everything else should remain fine!
All the drones manufactured by developers come with their individual set of safety criteria and you should get yourself acquainted with them before you actually start flying your drone. You can take help from the users’ instruction manual that comes with your drone to learn how to identify the safety indicators and determine what they actually imply.
Generally, you should make it a habit to arming your device’s radio controller and motors before you embark on your aerial adventures. The process may vary from one drone to another. However, the ultimate aim of arming a drone is the same for all of them. Arming your UAV is the last thing that you carry out before you set your drone whizzing through the air. It lets your machine know that it’s business time and delivers the control of the drone to the flight controller.
If your safety indicator portrays that the drone is armed, then we highly suggest you not to pick it up, come what may! A drone that is armed is ready to takeoff! So, any motion could trigger the rotation of propellers which would do so to ensure that the device gets stabilized. Picking up an armed drone could result in a catastrophic situation and severe drone injuries.
Keep in mind that if you are getting yourself and your drone ready to takeoff or are just finishing your day’s flight, do not attempt to pick your drone up if it is armed. We suggest you to go a step further and disconnect the batteries to ensure enhanced safety.