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Deathcopter 5000

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MT:

--- Quote from: eti on June 05, 2022, 08:39:47 pm ---Would you get in this? Surely you'd have to be a little INSANE...

https://www.reddit.com/r/dji/comments/v5eduv/to_fly_or_not_to_fly/

--- End quote ---

Insane? Not even close compared to this:

bd139:
There is a history of people killing themselves with home made helicopters. Someone's going to get hurt.

Example - don't watch it. The dude dies

james_s:
Aviation development has always been dangerous, lots of professional test pilots have died testing new aircraft prototypes designed by experienced engineers. Technology has improved to the point that it is less dangerous now than it used to be but there is still risk, that doesn't mean people should stop trying. That accident can be a teaching experience on the importance of a helmet among other lessons.

rob77:

--- Quote from: james_s on June 06, 2022, 05:15:25 am ---
--- Quote from: tom66 on June 05, 2022, 09:55:05 pm ---How on earth do you control such a monstrosity?  The gentleman in the video surely understands that every engine will produce varying amounts of thrust -- are there drone controllers that can account for the natural instability of combustion engines (torque regulation is poor; response time even more so.)

--- End quote ---

Sure, technologically it's no problem, it can be tuned and made to fly, although it will probably not fly as well as an electric multirotor this is not the first fuel powered one that has been built and flown. There is no way I would get on board though, those little engines are not known for being extremely reliable, those at least appear to be spark ignition but even so deadstick landings of fuel powered RC airplanes are not uncommon.

--- End quote ---

no, it can't be easily "tuned" to fly...  ;D  look closely at every DIY combustion engine multirotor , they're either unstable or the control is extremely sluggish to account for the response time of the combustion engine.  with combustion engines you would need variable pitch propellers in order to control thrust with immediate response, but you would be even better with gimbaling the engines (aka thrust vectoring) to control direction (every VTOL in production is using thrust vectoring for a reason)

 

james_s:

--- Quote from: rob77 on June 06, 2022, 08:00:43 pm ---no, it can't be easily "tuned" to fly...  ;D  look closely at every DIY combustion engine multirotor , they're either unstable or the control is extremely sluggish to account for the response time of the combustion engine.  with combustion engines you would need variable pitch propellers in order to control thrust with immediate response, but you would be even better with gimbaling the engines (aka thrust vectoring) to control direction (every VTOL in production is using thrust vectoring for a reason)

--- End quote ---

I didn't say it was easy, or that it would fly well, but it can be tuned to fly. It's not a good solution but that doesn't mean it can't be made to work to some degree without huge effort. I agree that variable pitch props is a far superior solution.

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