Horace Heffner wrote:
On Nov 14, 2007, at 7:22 PM, Stephen A. Lawrence wrote:
JNP replies again! And once again they do not provide power
numbers.
In fact they no longer even mention the question of output power in
their response, and snipped all mention of it from my message --
they turn the discussion entirely to their "challenge" and how I
must be a coward if I don't take them up on it.
I ask again: JNP: What's the output power of the motor? Are you
courageous enough to state it in public?
The problem could be the difficulty in understanding exactly what
power is. If you can't understand the qualitative or dimensional
difference between voltage and power how can you understand similar
differences between momentum and power or head and power?
I don't think there is any misunderstanding here -- I think they
understand exactly what I'm asking for. We're talking about a motor,
and a company that _specializes_ in motors. I've asked for "shaft
horsepower" and "brake horsepower". Anyone who deals with motors *MUST*
know what that is.
They've also been asked for torque. Again, anyone who deals with motors
*must* know what that is, and they won't provide it.
Open the owner's manual to any car, you'll find both numbers given.
This is not highly technical stuff; everyone who ever drives a car has
heard of "horsepower".
Imagine walking into a car dealership, and you ask to see particular
model. You're told that car comes with either of two different engines.
You ask how powerful the two engines are -- and the dealer won't tell
you! That's absurd, of course -- and so is the behavior of JNP co.
Torque is not hard to measure. RPM is easy to measure. The product is
power. It's that simple, and they know it perfectly well at JNP.
In the course of this correspondence, which matches so well Bill's
description of the behavior of a con artist, I've become convinced of
several things:
* JNP is not about to commit fraud. They won't /lie/ about tests
they have done; that would be a very bad plan.
* They know exactly what the output power is.
* The output power is less than the input power. (Just like every
other electric motor in the world today.)
* They won't ever admit the output power is less than the input.
Where does that leave them? Exactly where they are: They cannot --
will not -- tell anyone what the output power is, given 20 watts of
input power. Not today, not tomorrow, not ever.
And since they've told us the RPM in the demo, they can't tell us the
torque, either -- that would be tantamount to telling us the output power.
BTW I periodically post, and have on my web page: "Please be advised
that the content of any correspondence to me, Horace Heffner, is
placed into public domain unless otherwise specified by prior written
agreement. I can be contacted at: [EMAIL PROTECTED] However,
by sending unsolicited information to this address, the sender agrees
to place it in public domian and to make it available for immediate
posting to public news forums."
I sometimes find it useful for the kind of correspondence with which
you dealing or may be dealing.
Good point :-)
Horace Heffner http://www.mtaonline.net/~hheffner/
