On Aug 4, 2009, at 8:49 AM, Harry Veeder wrote:
- Original Message -
From: Horace Heffner hheff...@mtaonline.net
Date: Tuesday, August 4, 2009 1:41 am
Subject: Re: [Vo]:Marinov BB motor test problems
[snip]
The nichrome coil is a resistor being fed a large current. P = i^2
*
R
Horace,
Just for the hell of it, I am making a new bearing motor out of automotive
bearings, the old conical roller type used in the front wheels of
rear-wheel-drive cars. It's almost done, but I unfortunately ran out of 5/16
nuts tonight, so cannot continue until tomorrow evening.
Two
Here are the results of measuring my current sense resistor, R1.
Here's my measurement setup and results:
? ohms 48.3 ohms
o--R1-o--R2--o
0V 21.7 mV16.68 V
Total ohms 48.5
The 48.5 total ohms reading
On Aug 5, 2009, at 5:58 PM, Kyle Mcallister wrote:
Horace,
Just for the hell of it, I am making a new bearing motor out of
automotive bearings, the old conical roller type used in the front
wheels of rear-wheel-drive cars. It's almost done, but I
unfortunately ran out of 5/16 nuts
- Original Message -
From: Horace Heffner hheff...@mtaonline.net
Date: Tuesday, August 4, 2009 1:41 am
Subject: Re: [Vo]:Marinov BB motor test problems
On Aug 3, 2009, at 4:15 PM, Harry Veeder wrote:
- Original Message -
From: Horace Heffner hheff...@mtaonline.net
Yes, that is exactly what I was wondering. So does the coil would
heat up
faster if the fly wheel is locked?
harry
For under $100 you can order the parts and find out for yourself.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
On Aug 2, 2009, at 8:21 PM, Kyle Mcallister wrote:
Keep us posted as to your results. Very interesting, to me at least.
--Kyle
Here's the full write-up updated through today's experiments:
http://www.mtaonline.net/~hheffner/HullMotor.pdf
It has links to videos of the control (ordinary
The following has been updated to improve construction information
and to note a follow-up experiment using graphite powder lubrication
in the stainless steel bearings:
http://www.mtaonline.net/~hheffner/HullMotor.pdf
For convenience, the sections updated follow:
Experiment Construction
Great!
now you should see if you are getting more (or less) power out than
you put in to make the motor spin.
harry
- Original Message -
From: Horace Heffner hheff...@mtaonline.net
Date: Monday, August 3, 2009 7:23 am
Subject: Re: [Vo]:Marinov BB motor test problems
On Aug 2, 2009
On Aug 3, 2009, at 11:35 AM, Harry Veeder wrote:
Great!
now you should see if you are getting more (or less) power out than
you put in to make the motor spin.
harry
Actually, that sounds like a better project for you! 8^)
It can't be even close, as far as mechanical energy. The input is
- Original Message -
From: Horace Heffner hheff...@mtaonline.net
Date: Monday, August 3, 2009 4:48 pm
Subject: Re: [Vo]:Marinov BB motor test problems
On Aug 3, 2009, at 11:35 AM, Harry Veeder wrote:
Great!
now you should see if you are getting more (or less) power out than
I've appended new versions of Fig. 3 and Fig. 4 to:
http://www.mtaonline.net/~hheffner/HullMotor.pdf
I think these figures are the main problem with my communicating the
hysteresis explanation for the Marinov Ball Bearing Motor.
I also included in the above two photos of an experiment under
I wrote: I expect to try a powdered graphite lubricant to encourage
better contact and hopefully to avoid welding.
I wrote: I expect to try a powdered graphite lubricant to attempt
better steel-steel electrical contact and yet hopefully avoid welding.
I don't normally talk to motors,
--- On Thu, 7/30/09, Horace Heffner hheff...@mtaonline.net wrote:
Some of the youtube experiment videos show motors that seem
to run well with low current. I would not have expected the
contact to be so poor. Maybe it *is* indeed poor and
that is key to getting enough torque. The fact
On Jul 30, 2009, at 5:57 PM, Kyle Mcallister wrote:
--- On Thu, 7/30/09, Horace Heffner hheff...@mtaonline.net wrote:
Some of the youtube experiment videos show motors that seem
to run well with low current. I would not have expected the
contact to be so poor. Maybe it *is* indeed poor and
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