Perpetaul Motion Machines

Reply

  #1  
Old 08-19-16, 05:11 AM
Norm201's Avatar
Member
Thread Starter
Join Date: Sep 2013
Location: USA
Posts: 5,558
Perpetaul Motion Machines

We all know perpetual motion machines are an impossibility. Friction (or other outside forces) will eventually stop them. However, here are two videos showing designs from centuries ago and the second video showing modern day machines.
Warning these are rather long videos.

What's interesting is that once put into motion it seems as though they will go on forever. So at what point will they stop?

On the modern day units it seems as though the springs will continue to add the needed energy.

I suppose a self winding watch is similar and the wrist movement keeps imputing energy.

At any rate very interesting.

https://www.youtube.com/watch?v=287qd4uI7-E

https://www.youtube.com/watch?annotation_id=annotation_3321741703&feature=iv&src_vid=287qd4uI7-E&v=FO566k4nA3g
 
Sponsored Links
  #2  
Old 08-19-16, 07:17 AM
pugsl's Avatar
Forum Topic Moderator
Join Date: Mar 2008
Location: Raleigh, NC
Posts: 7,646
Great link makes me want to go out and build one. Maybe someday.
 
  #3  
Old 08-19-16, 09:10 AM
Member
Join Date: Nov 2007
Location: MI
Posts: 2,446
I don't believe any strictly mechanical machine can create the slight extra energy needed to overcome friction and be truly perpetual motion. But I'd settle for one that spins for a couple hours next to my desk :-)
 
  #4  
Old 08-20-16, 06:14 AM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,968
Now, put a load on them. Fun to watch, but most impractical as "machines" to perform work.
 
  #5  
Old 08-20-16, 06:36 AM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 19,538
Got a Dewalt bench grinder. When you shut it off, it spins for a full 10 minutes on its own. I timed it once... and first time i got it i also wondered if I had really shut it off. Must have some good bearings. But like Larry says, put a load on it and it stops pretty quick. 0 amps doesn't have much power... lol
 
  #6  
Old 08-21-16, 09:30 AM
the_tow_guy's Avatar
Group Moderator
Join Date: Feb 2001
Location: SW Fla USA
Posts: 11,517
They all make you wonder if, in fact, they would run perpetually, i.e. essentially forever. They are, as pointed out of course, really just novelties as they would never support a load.

:WRECKER:
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
'