Fire Fighting Drone Overview

by FliteTest | September 30, 2015 | (6) Posted in Projects

The first tests of the extinguisher proved that the orientation wasn't the best. 

The bottle was intended to be fired vertically. On its side the hose only picked up half of the contents. 

The solution was to heat the hose and bend it downward in order to scrape the bottom the barrel!

The motors used were Avroto 3515 kv400. They have roughly 4 pounds (1.8 kg) of thrust each. More than enough for this project.

For the flight controller, Peter utilized an Eagle Tree Vector which also has that awesome OSD.

The firing mechanism consisted of two powerful servos that had to be isolated on their own reciever. This was mainly for safety so it wouldn't interrupt the flight controller if anything did go wrong.

The servos simply pulled this small cable...

...which wrapped around the trigger. 

Here you can see the complete mess of wires that makes this baby tick.

The custom landing gear was made from aluminum. It's the same material you can get from your local hardware store. 

For the cool emergency lights, Peter hooked up this super cheap RGB LED controler. It has several different functions that make the lights flash in different patterns.

For the initial test, firing vertically was not optimal. With all the rotor wash, and being directly above the flame, it actually fanned the fire and made it worse. The powder was also dispersed before it even got to the fire. 

The solution, was a new solution! A mix of water, baking soda, and dish soap were fired horizontally in order to keep the rotors away from the fire. 

If you have any cool projects like this that you've made, make an article here on FliteTest.com! Share your skills and swap tips with like minded pilots. 

As always thank you for being part of the Flite Test Family! 

COMMENTS

mrwzrd59 on October 1, 2015
That thing is crying out for GPS lock! If it flew as good as my Chroma, it would have put 99% of the contents on the fire! It needs a great deal more development but I love the concept of not putting people in harms way fighting fires from above or inaccessible areas. You can clearly see how Peter thinks thru the problems and overcomes them so quickly! The man needs to be plugged into a tech think tank at a much higher level! His mind is a wellspring!
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Good Kebo on October 1, 2015
Cool rig, definitely has a more "friendly" look to it. For those of us who like multi copters and build them I think this is important to foster that positive view of drones from the general public and press. Nice job.

It would be interesting to figure out some sort of device that automatically holds the copter directly upwind of the fire, so the agent would all go directly into the fire. Maybe with a 3DR controller and multiple pitot tubes?

Thanks for showing your bike wheel camera holder, loved the shots you got from it.
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bruin12 on October 5, 2015
Very cool ship. I would love to see Peter's interpretation of a Donier Do 335, a very fast interceptor from WWII. The push/pull motor arrangement will be tricky, not to mention hand-launching! I would also like to see an article on mounting retracts on foam board planes. What reinforcement is necessary? Plywood?
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tobiusnc on October 8, 2015
This got me thinking... Since it's fighting the fire from above, do you really need a pressurized fire extinguisher? If it was replaced with gravity deployment of the dry chemicals (commonly Potassium Bicarbonate), it would be able to deliver more chemicals with the same payload capacity.
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Maxwell542 on October 27, 2015
This got me thinking I had an idea before I saw this but with a plane drone that has verticle take off and it shoots missiles that have a compound mixture too eleminate the fire but I also liked their idea but I would make it out of carbon fiber so it's lighter and stronger this allows it to have a bigger tank of powder or water combo
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Fire Fighting Drone Overview