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17 Jan 2020 17:44:22
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ched:
01 Jan 2020 00:12:50
Happy new year everyone, happy flying.  :beer2: :beer2:
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31 Dec 2019 17:06:13
Happy new year all hope 2020 is a cracking year for you  :beer2:
ched:
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ched:
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Have a great time DB. Look forward your projects in 2020.  :beer2:
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21 Dec 2019 16:14:27
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DarkButterfly:
21 Dec 2019 16:13:44
Tbh I've been really busy, not had much time to fly anything and with conditions being crap, hopefully in the new year I'll have some new projects on the go, mostly to do with HAM radio, will certainly fly again soon. FTR I hate FB too   :D Merry Christmas
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21 Dec 2019 15:21:30
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3d - Printworx

Printing 3d Forum

Quadcopter in a glass elevator

Started by teslahed, Tuesday,July 31, 2012, 22:21:37

Previous topic - Next topic

teslahed



Can you guess what will happen? I managed it.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

Also guessed it right  ~~ its a good test and those guys have some other videos that are worth watching nice find  ~~

BYOD

I didn't guess right..... They left with all fingers, faces, eyes etc. intact!

Great video, I think a sonar unit would stop this from happening!

Regards

Martin.

Gaza07

Your guess just made my morning  :rofl: Good point about the sonar that would have changed the results, but it would be cheating  ::)

Quote from: BYOD on Wednesday,August 01, 2012, 08:20:57
I didn't guess right..... They left with all fingers, faces, eyes etc. intact!

Great video, I think a sonar unit would stop this from happening!

Regards

Martin.

teslahed

They got it slightly wrong (i think) - they ignored air resistance. The quadcopter will go upwards when the lift (elevator for americans) goes up because the rising air bubble trapped in the lift will exert a force on it. This force will be much weaker than the opposition to the change in motion due to the momentum of the quadcoper so the effect is minimal and you see the quadcopter 'fall' downwards when standing in the lift with it rather than being lifted upwards slightly as is actually happening relative to an outside observer.

That's assuming the lift doesn't have a wire mesh ceiling and floor to allow air to pass through.

It's a bit like keeping half your canaries flying in a truck to save on loaded weight - only works if you have a wire mesh roof and floor in your trailer to allow the downdraft to pass through.

That's all assuming i haven't forgotten all the science i learned at school :confused:
One circlip short of a quadcopter.
 1 lobe short of an antenna.

Gaza07

The problem is if the truck driver slams the brakes on and you do have wire mesh then your canaries will end up looking like crinkle cut chips  :rofl:

MadMax

Wasn't really sure what to expect but the explanation makes sense, @byod I could just picture them coming out of the lift all hacked up and saying, that didn't go to well  :rofl: