Really fast motor!

  • 12 Replies
  • 8315 Views

0 Members and 1 Guest are viewing this topic.

*

Offline Mr Andrew

  • Sr. Member
  • ****
  • 206
  • God was primitive man's attempt at Physics.
    • View Profile
Really fast motor!
« on: 23/12/2006 00:26:13 »
I have been reading about a gyrating superconductor that spun at near 30,000 rpm's and generated a gravity shielding effect.  This is all in another thread--my question is about how to build such a motor that would spin at 30,000 rpm's.  How would one get a motor to spin that fast?  Could it be done with a DC motor?  I have a little of E & M and tried calculating the voltage needed to spin a motor that vast--it was enourmous.  Is there some way to do it with a weaker power source?
--Life is the greatest experiment that any person will ever conduct.  It should be treated with the same scientific method as any other experiment.

*

Offline neilep

  • Withdrawnmist
  • Naked Science Forum GOD!
  • *******
  • 20602
    • View Profile
Re: Really fast motor!
« Reply #1 on: 23/12/2006 00:41:59 »
 Are you gonna need some super strong components to withstand such a high revolution  ?....good luck..i hope you get some great advice here.
Men are the same as women, just inside out !

*

Offline NewBill

  • Jr. Member
  • **
  • 43
    • View Profile
Re: Really fast motor!
« Reply #2 on: 23/12/2006 00:47:48 »
I must be missing something here.  I thought 30,000 rpm was quite pedestrian and so it is:

http://www.google.com/search?client=safari&rls=en&q=30000+rpm+motor&ie=UTF-8&oe=UTF-8

Don't know how this relates to super conductors or gravity shield effect though.  Maybe that's what I am missing?
« Last Edit: 23/12/2006 00:50:17 by NewBill »

*

Offline neilep

  • Withdrawnmist
  • Naked Science Forum GOD!
  • *******
  • 20602
    • View Profile
Re: Really fast motor!
« Reply #3 on: 23/12/2006 00:59:07 »
I must be missing something here.  I thought 30,000 rpm was quite pedestrian and so it is:

http://www.google.com/search?client=safari&rls=en&q=30000+rpm+motor&ie=UTF-8&oe=UTF-8

Don't know how this relates to super conductors or gravity shield effect though.  Maybe that's what I am missing?

Clearly, I am the one missing something....a few thousand revolutions by the looks of it..THANK YOU NewBill..initially...500 revs a second seems stupidly fast..but in the grand scheme of things...as you say...it's pedestrian.
Men are the same as women, just inside out !

*

Offline Atomic-S

  • Hero Member
  • *****
  • 953
    • View Profile
Re: Really fast motor!
« Reply #4 on: 23/12/2006 02:17:42 »
There are air turbines that can do 300,000 rpm nicely.
 

*

Offline syhprum

  • Neilep Level Member
  • ******
  • 3898
    • View Profile
Re: Really fast motor!
« Reply #5 on: 23/12/2006 06:18:47 »
There was a Scophony-Baird projection TV reciever built in 1936 that used a motor rotating at about this speed to produce the scan lines with the aid of a modulated light beam and a spinning mirror.
syhprum

*

Offline daveshorts

  • Moderator
  • Neilep Level Member
  • *****
  • 2583
  • Physics, Experiments
    • View Profile
    • http://www.chaosscience.org.uk
Re: Really fast motor!
« Reply #6 on: 24/12/2006 00:04:34 »
30 000 rpm is only 500Hz, which is fast for a recipricating engine but not too bad for an electric motor or a turbine, although if the effect is very small you may have to spin a very large piece of superconductor, which may be more difficult.

I don't know the research you are meaning, but I would warn that it would be immensely difficult to seperate a gravity shielding effect from electromagnetic effects. You will get all sorts of hideous induction, effects (both electric and magnetic) if you are spinning superconductors that fast.

*

Offline syhprum

  • Neilep Level Member
  • ******
  • 3898
    • View Profile
Re: Really fast motor!
« Reply #7 on: 24/12/2006 16:24:57 »
I would be interested to hear of any recipricating engine that ran at 30,000 rpm, Grand prix engines with a life of maybe 10 hrs run at up to 20,000 rpm but I have never heard of any faster.
syhprum

*

lyner

  • Guest
Re: Really fast motor!
« Reply #8 on: 24/12/2006 16:42:35 »
My dentist's drill does a lot better than that and it doesn't hurt a bit.

*

Offline ghh

  • Jr. Member
  • **
  • 48
    • View Profile
Re: Really fast motor!
« Reply #9 on: 25/12/2006 18:48:18 »
   

I would be interested to hear of any recipricating engine that ran at 30,000 rpm.

About the top limit - "ducted fan" model aircraft engines got up to 26,000 (3.5 HP from 15 cc =.90 Cu Ins). you can get brushless electric motors to do 30K on about 22 Volts = 2Hp. but now you can get small gas turbines. These do typically 140-160 K rpm. for thrusts of 20-50Lb. the smallest commercial gas turbine kicks out 10Lb static thrust at 190,000 rpm.
No gravity effects however, we model fliers would have noticed!
Graham
 

*

Offline syhprum

  • Neilep Level Member
  • ******
  • 3898
    • View Profile
Re: Really fast motor!
« Reply #10 on: 25/12/2006 19:29:36 »
I knew these tiny engines would run up to at least 20,000 rpm, I did not know a further 6,000 had been coaxed out of them, What life do you get?
3.5 bhp is not very good,larger engines produce about 100/bhp per liter per 6000 rpm in natrualy asperated form but I guess these small engines are two stroke which is not very efficient.
Turbines are a whole new ball game, I would be interested to know the cost and the life.
syhprum

*

Offline ghh

  • Jr. Member
  • **
  • 48
    • View Profile
Re: Really fast motor!
« Reply #11 on: 25/12/2006 20:16:58 »
What life do you get?
on the IC engines Probably not more than 10 hours without a service.
we havent really found a time limit for the turbines- they seem to go on forever as long as you dont cock up the oil mix
http://www.wrenturbines.co.uk/jets.php
"44" = 44 mm turbine diameter
They can fly at 200+ mph
http://www.ukjets.co.uk/gallery.htm
 

*

Offline Mr Andrew

  • Sr. Member
  • ****
  • 206
  • God was primitive man's attempt at Physics.
    • View Profile
Re: Really fast motor!
« Reply #12 on: 02/01/2007 23:41:43 »
ha, sorry... I meant 80,000 rpm.  Check out this website --> http://www.americanantigravity.com/podkletnov.html
--Life is the greatest experiment that any person will ever conduct.  It should be treated with the same scientific method as any other experiment.