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Old 09-03-2012, 01:30 AM
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Ufopolitics Ufopolitics is offline
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Join Date: Feb 2012
Location: US, Florida
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Dubious Dyno Tests...Dodgey Results

Quote:
Originally Posted by Farmhand View Post
I'm dubious about the home done dyno tests. I don't see how if a belt that has a
much lower friction value could give the same result as one that has a higher
friction value. ie if the belt used is slippery a lot more force could be applied to
the belt before the same effective drag is placed on the motor shaft.

eg a belt made from greased leather compared to one with tar applied or two
leather belts but just with different friction values would show different results I
think. As a belt is used it will probably get more and more smooth and slippery.

I don't think any old strap or belt could be used to give an actual HP value, I
think all that could be determined would be a relative value for comparison.
And with a belt that becomes smoother and shinier as it is used the friction
value would change and so skew the results.

To come up with an actual "horse power" value from a home made dyno using
a strap and some scales is dodgey to say the least in my opinion.

It doesn't make any sense to me that two people can use different straps
with different friction values and both get an accurate power value.

Any thoughts on that ?

Bottom line is these type of tests can be easily faked I think. Maybe that is a
good project fro me to do next, see if I can show two different readings from
the same motor using belts with different friction values, or the same belt
modified to have a lower friction value. Sounds like fun to me.

Cheers

P.S. And the reflective tape for the RPM meters is a doozy, if the meter
comes with reflective strips they are meant to be used I imagine. The
question is if the reflective strips are there why not use them to be more
accurate ?

..

Quote:
To come up with an actual "horse power" value from a home made dyno using
a strap and some scales is dodgey to say the least in my opinion.
Peter Lindemann -- Electric Motor Secrets - YouTube


Quote:
P.S. And the reflective tape for the RPM meters is a doozy, if the meter
comes with reflective strips they are meant to be used I imagine. The
question is if the reflective strips are there why not use them to be more
accurate ?
If You are not familiar with New Technology and electronics in Tooling ...and still keep used to the Old Fashioned Antique Equipments from Second World War...that is NOT my problem...but Yours...
This Tachometers, the same way the new Laser Thermometers , are equipped to perform at "Dual Functions" meaning with LASER and without it, meaning just Infra Red. LASER is provided to ENHANCE Accuracy as to reach longer distance. Tape is supplied for IR use without Laser.

P.D: It is absolutely not my desire, and much less "My Pleasure" to respond to you, since you have earned the ability to produce Nausea and Disgusting feelings in my stomach...However, I must do it, just because You are referring about Me, My Thread and The Members Excellent work replicating and testing My Machines...accusing them of Faking Results...and all those vomiting and dark spoiled rotten "verbs" that are always spilled and excreted from your brain...

And I am NOT going to allow you to post ANYTHING like that without My response...and it could be here, on this thread, mine or in the middle of no where...

Never Regards for such disgusting poor creature like you, but compassion about your great pain...
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