Electronics > Projects, Designs, and Technical Stuff

I'M HAVING DRONE ENGINE TROUBLE!!!

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Nerull:

--- Quote from: IDEngineer on January 10, 2019, 12:34:26 am ---My son is an internationally ranked drone racing pilot. We do a LOT of design, construction, testing, and flying here. My very educated response to the OP's post is:

"If you have to ask such questions, you are not qualified to build nor fly such an aircraft."

I honestly don't mean to sound insulting. I'm deadly serious. Anything powerful enough to carry 10 gallons of water (that's over 80 pounds!) as a payload is a serious threat of injury or death to anyone nearby. Racing drones typically spin five inch diameter props and are less than 300mm across, yet we call them "flying lawnmowers of death" and erect protective screens for the pilots and audience at competitions. Anything that can sustain 80 pounds of payload is going to be significantly larger and more powerful, with commensurate risk of injury. I'm not kidding... we're talking amputation of limbs and instantly fatal injuries.

Think a really long time about what you're considering, and if you still want to do it start with small platforms to gain experience. I'd suggest 2-3 inch props with appropriate payloads, then scale up. You need familiarity  with the control hardware and software, for example, and that experience will scale up to larger platforms. But while you're gaining experience you won't be hurting or killing yourself or others.

Once again: I'm not exaggerating. I'm not cavalierly tossing around words like "injury" and "amputation" and "death" just to get attention. The motors/engines and rotary wings necessary to transport 80+ pounds are significantly stronger than the human body. Don't get hasty and make a permanent mistake. I encourage your enthusiasm and reseach into this field but do it slowly and responsibly.

--- End quote ---

He's really not kidding: https://www.news.com.au/world/man-decapitated-by-remote-controlled-toy-helicopter/news-story/5e1dd8b2ef951c2863906cc53931b158

At these sizes spinning props are very dangerous. This is not a "my first electronics project" thing.

In addition, at this size a drone is no longer considered a 'small unmanned aircraft' by FAA regulations and a whole new host of rules come into play.

beanflying:
R/C Heli blades are built different to the smaller (sub 5kg) Drones or UAV blades. They have lead weights at the tips and a 'safety' cable back to the root of the blade. 2200RPM Carbon wrapped Wire slicer dicer :'(

Typical Drone props are plastic or straight carbon and will cut you up badly or eye damage is the obvious issue. The major risk to life is an out of control lump of stuff at speed in their case more than the blades themselves.

Nerull:
He's not talking about a sub-5kg drone through, he's talking about a 100kg+ aircraft. I've had my finger sliced up by a 180-size quad, it really doesn't take much.

beanflying:
You introduced something of a style which wasn't being discussed and I clarified the reasons for the resulting gruesomeness that was all. In my toy collection I have a pair of TREX 600's similar to what caused the death and so far still have all my bits attached and haven't damaged anyone else in flying them. Flying close quarter Aerobatic Heli's has major risks when it goes wrong.

Worst slice I have had in over 30 years came from a pissy 1.5CC Diesel engine. Timber prop 6 lacerations to the palm of the hand as I went to adjust the compression screw. Ether in the cuts caused rude words to be said before heading to casualty.  :-X Worst injury I have seen was at a National championships over 15 years ago where a person with decades of flying experience fed their entire forearm through a 24" prop. They did keep it just.

Humans have walked into Props at airports in the past either intentionally or unintentionally over the years too. Dead is dead whether from something airborne or a Red Bus.

The OP will have no idea of the hoops the CAA (assuming he is actually in the USA) and it ever gets made will put him through to get it approved to take off in the first place.

Mechatrommer:

--- Quote from: Mckinney161107 on January 09, 2019, 08:08:29 pm ---Hey everyone I just wanna know what are the best engines for drones. I want to build a drone that can carry 10gallons of water. Do I have to build one that can create that much power.

--- End quote ---

--- Quote from: Mckinney161107 on January 10, 2019, 04:24:32 am ---Do you have any recommendations on starting small scale

--- End quote ---
since i can read mind...
https://en.wikipedia.org/wiki/Archimedes%27_screw

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