We would like to announce that Nippon Kayaku(HQ: Chiyoda-ku, Tokyo, President: Mr. Atsuhiro Wakumoto) has conducted a demo-test of its developing PARASAFE®︎, the emergency parachute system for commercial drone on October 26,2021 in cooperation with Yabu city(Hyogo prefecture), the National Strategic Special Zone, and confirmed the parachute efficacy during sudden drop of a drone.
【Outline of Demo-test】
<Title of Demonstration test>
Efficiency verification test of parachute on drone emergency.
Tuesday, October 26, 2021, from 09:00 to 17:00
Tsurugigaoka Park Ground (291－1, Koyama, Yokacho, Yabu City, Hyogo Prefecture)
【Aim and meaning of conducting this Demo-test】
We conducted this Demo-test in order to confirm the efficacy of parachute system as an emergency safety device during flight in city area and so on where drone uses are anticipated from now on.
If the efficacy of parachute system is proved by this Demo-test, it will bear us ease in drone use, spread of drone will be promoted, and utilizing drone at new industrial area/types will also be promoted. This was also a Demo-test to expand the opportunity of drone use by verifying efficacy of PARASAFE® in protecting human life, loading object and Drone machine itself.
【Program, result and summary of this Demo-test】
■Program of this Demo-test
①Let the drone take off from the point shown in the chart below and fly at aheight of about 40 meters, to the overhead of descending point in the middle of the ground.
②Intentionally cut off motor power source of drone, hovering at a height of about 40 meters overhead the descending point, and stop the propellers.
③After 1 second of cutting off motor power source, PARASAFE®︎ activates and injects parachute.
④Drone descends with parachute and lands on ground.
⑤Take a photo of the landed drone and evaluate by comparing drones before takeoff and drone after landing.
■Result of this Demo-test
●Photo of drone before takeoff ●Photo of drone after parachute landing
While Conducting parachute landing by following the program written in the previous page, we were able to fully lower the descending speed of drone. Also, by comparing the photo upper left and upper right, you can see there is no big damage, therefore we confirmed that we were able to minimize the collision energy to the ground by lowering the descending speed of drone. Also, by enabling to keep the drone position almost horizontal by the parachute, drone was able to land from the skid(the leg part of drone), therefore we were able to minimize the shock to the whole drone.
●Motor and propellers ●Batteries and wiring
Also, as you can confirm from the upper left photo, there was no damage nor distortion even in propellers which can be easily broken and drone was in a reusable state. Also, as you can confirm from the upper right photo, there was no damage to the batteries loaded on the drone.As Lipo-batteries, made of high reactivity material compared to conventional batteries, have high energy density, have possibility of abnormal heating and igniting, but this time there was no abnormal heating nor igniting in Lipo-batteries, as the collision energy to the ground was kept very small by parachute descending.
Also, all wiring parts were not disconnected and we were able to confirm that all wiring parts were at the same condition of pre-takeoff.
＜Altitude variation of falling drone＞
↓Start falling ↓Inject parachute ↓Open parahcute ↓Landing
・Altitude variation with parachute use.
・Altitude variation without parachute (Theoretical value).
The above chart is a graph of altitude data obtained by this Demo-test. The Orange graph is the altitude data obtained this time, and you can see that the altitude variation has easened from the point of opened parachute.
On the contrary, the light blue graph is the theoretical value without parachute use. From two graphs, you can see that without parachute use, drone drops with a speed more than ≧6 times faster than with the use of parachute, and a big shock is given to drone at the time of landing.
■Summary of this Demo-test.
From the result as mentioned above that there was no damage to drone due to parachute descending, you can assume that even if the parachute descending drone collided with a building or human, those damage will be very small, compared to fall of drone without parachute. Also, based on the altitude variation data of descending drone, we found that we are able to decrease the descending speed of drone by at least 5/6, comapared to without use of parachute.
Thus, by this Demo-test, we are able to confirm that emergency descending parachute is very effective at the time of malfunction of drone.
【Comments from the people intrested】
■Mr. Masahiro Hamada, Head of Aero Business Development Office, Safety Systems Group
We have succeeded all the planned parachuted drone test and obtained data that we were aiming at. Also, we were able to show the parachute to the people who took effort in gathering at the venue of Demo-test, up closely and were able to let them realise that PARASAFE® can make great contribution to the safety of drone utilization. From now on, we would like to test the flight route, flight location, type of drone and malfunction mode with a nearest state to the actual drone service and increase usefulness of drone as a safety device and to be used by many service providers, and would like to contribute to the safety of drone.
■Mr. Sakae Hirose, Mayor of Yabu city
Let the drone fly, and assuming failure, stop the motor.Then inject parachute, and descend by parachute. That was the content of the Demo-test, and it was proceeding very smoothly. When the drone was descending with parachute, it was very stable and secure, shock of falling to the ground was low and I think it was very successful as a test.
It is said that in the future, the day of flying cars, including drones, will come, but at the same time, we need to think about the possibility of failure during flight. In case of an emergency, to protect valuable delivery goods as logistics, expensive drone itself and to protect human lives of occupants of flying cars, this will be an absolutely needed technology.
I would like to express my gratitude for conducting the test in Yabu city.In Yabu city, we are proceeding the project of National Strategic Special Zone, and as a part of this project, we feel that this is the first step of tests which obtain big results. Congratulations for the success of the test.
■Prodrone Co., Ltd.
To realize a drone flight beyond eye-sight (Level 4) in manned zone, safe and secure drone is required. We think parachute is one of the effective technologies for safety device in emergency, and it was a precious opportunity for PRODRONE to cooperate in a project for practical use.
【About“PARASAFE®︎”, the emergency parachute system for commercial drone】
“PARASAFE®︎”, the emergency parachute system for commercial drone is a device which makes a drone to descend safely by activating the pyrotechnic remotely and injecting parachute instantly after noticing that the drone is falling. NIPPON KAYAKU globally develops, manufactures and markets Automotive Safety Parts such as inflators for Air Bags and Gas Generators for Seatbelt Pretensioners and develops “PARASAFE®︎”applying the pyrotechnic technology cultivated in this field. We will start marketing “PARASAFE®︎”from December, 2021.
PARASAFE®︎ official site（https://parasafe.jp/）
・Maximum take-off weight：25kg（55lbs）
・Square area of parachute ：12㎡
・Descending speed（Theoretical Value）：5m/s （At the time of hanging 25kg）
・Minimum deployment altitude：30m or more higher
【About the drone used in this Demo-test】
・Manufacturer：Prodrone Co., Ltd.（https://www.prodrone.com/jp/）
・Name：General Purpose Drone
・Distance between the motor axles：1000mm
・Size：700x700x410mm（PARASAFE®︎ not included）
・Take-off weight：9.07kg（PARASAFE® included ）
・Payload：2.5kg（PARASAFE® not included）
・Flyable time：15minutes（PARASAFE®︎ loaded）
As for Press release, please look at PRTIMES of the following URL
If you have any questions, please do not hesitate to contact us.