Beforehand flying with your drone, please find out the regulation of the country where you are.
In France, it is important to know the regulation of the drone flight scenarios S1, S2, S3 ou S4.
The scenario S3 from the DGAC describes an operation running in agglomeration or nearby persons or animals, with a direct view and at a maximal horizontal distance of 100m from the pilot.
In this case, the legal limits of this scenarios are defined by the following rules: a maximal horizontal distance of 100m and a maximal altitude of 150m. The S3 accreditation is given for a drone flying mass limit of 2kg without parachute or for a drone flying mass of 8kg with parachute and if the installation of the technical equipments required by law have been validated. The drone must be equipped with a safety system according to the annexe 2 of the french law of the 11th of April 2012 (parachute…).
The use of a remote dedicated to trigger the parachute deployment and an automatic motor switch-off are mandatory.
Some advices and useful informations
Never use 2 parachutes simultaneously to secure a drone
- The deployment is never really simultaneous. The opening of the first parachute will delay the opening of the second due to the fact that the first one already slow down the fall of the drone. It reduces the air speed and the second one will take more time to open. Therefore this will increase the deployment height.
- During the deployment of 2 parachutes, the parachutes are placing themselves in opposition with an angle of 45° (also called the "mirror effect" in aviation terms). Because of this angle, only 50 to 60% of the parachute surface is used. It is inaccurate to add the surfaces of the 2 parachutes to secure a drone and be in accordance with the regulation. For instance if I use 2 4kg parachutes kits, I will not be able to secure 8kg (many pilots do that mistake). You will only be able to secure a 4-5kg drone. Which place the drone operator in a bad situation regarding the laws because the impact energy is higher than the 69J fixed by the french regulation.
- The risk of using simultaneously 2 parachutes increases the risk of collision between them. The reliability is highly decreased.
- It is possible to use 2 parachutes on a drone only in a redondancy situation. This means that a parachute must provide a safety function. You will be lead to use a 2nd parachute only if the first one has a failure (it is an extremely unusual situation, mostly occuring because of an operator negligence during the drone preparation)
Using a dedicated remote is highly recommended
Most of the incidents occuring are due to an electronic failure. In order to have a system totally reliable and independent of the flight electronics, it is essential that the rescue parachute system is completely isolated from an electric, electronic and radiocommunication sights.
Using a parachute even when the regulation does not request it, is important.
A failure can occure on any machine, a setting or a piloting error, a flight collision. The damages occured by a crash can quickly reach thousands of euros.
The rescue parachute Opale Parachutes is the essential safe and reliable option to prevent crashes.