Mechanical resonance (Projects unlike forums hacks Tinman and Magluvin)

[Pirate88179]

Hey Brad

You know these setups with like say 4 alternators running off a flywheel driven by 1 dc motor? Was thinking about the gain of say 4 speakers vs say 1 speaker we were discussing earlier. I wonder if it is the same gain if we use 4 motors at a tot of 100w in vs 1 motor at 100w in.  Its not a common thing to do to have gangs of electric motors to drive a load. So I wonder if we can take advantage of that gain if there is a gain such as what we know of speakers and in your tests on that with your resonance assy.

What Im thinking is that increased surface area is more efficiency with the same input applied.  4 speakers have more cone surface area than 1 speaker with the same input. more cone area, more coil/mag surface area, so maybe being more motors will have more coil/mag surface area, perhaps eff can be increased this way.

Say if we had a motor that was 85% eff at 100w, would 4 motors ganged be better than 85% at a total of 100w? Or simply the same with 1 vs more alternators.


All this we have played with made me think and wonder if what some of these guys have with the motor driving the flywheel and it driving say 4 alternators may be something.  Wierd stuff if it is so.

Mags

Just my 2 cents, I do not think this will improve efficiency at all, but, please go ahead and test if you guys want to...because I am not sure 100%.  It just seems to me that one larger motor would be more efficient in any set-up than 4 motors of 1/4 the rating of the large one.

My main problem is that this would increase the losses x 4 due to increased friction, etc.

Bill

[Magluvin]

Just my 2 cents, I do not think this will improve efficiency at all, but, please go ahead and test if you guys want to...because I am not sure 100%.  It just seems to me that one larger motor would be more efficient in any set-up than 4 motors of 1/4 the rating of the large one.

My main problem is that this would increase the losses x 4 due to increased friction, etc.

Bill

Hey Bill

Yeah, it 'sounds' silly, dont it?..    Here is an example you may have seen from me before......


Say we have 1 speaker and we play a tone with it at 100w and we get 100db out.  Now if we increase the input to the speaker to 200w we get 103db out. So 3db increase in output for a doubling of power in.  If the input were 50w we would have 97db out, 3 db down.

Now if you add another identical speaker also with 100w, total 200w, we get 106db for an increase of 6db.   
1 speaker at 200w is 103db output
2 speakers with 100w each will give 106db output

So the gain happened because of using 2 speakers vs 1 speaker. Both tests consuming 200w.




So now,  if we have 1 speaker at 100w and we get 100db, and then we reduce the power in to 50w, we get 97db.

Now like the previous example, we add another speaker at 50w, we increase 6db, bringing that 97db up to 103db.

So, 1 speaker at 100w in is 100db out, and 2 speakers at 50w each is 103db out, for an increase of 3db out by applying the same total amount of power in as 1 speaker, and the only thing that changed is the addition of another speaker using a total input as we put into 1 speaker.


1 speaker at 100w is 100db
2 speakers at a total of 100w, 50w each is 103 db
4 speakers at a total of 100w, 25w each is 106db
8 speakers at a total of 100w, 12.5w each is 109db
16 speakers at a total of 100w, 6.25w each is 112db
And so on......

Guys used to do car audio shows using this method of increasing output for DB dragracing while staying in a lower watt classes. 


So 16 speakers vs 1 speaker has a 12db increase with the same input. And these speakers have their losses that add up also like you said about motors.

It is said that a 10 db increase is a doubling of the loudness of sound.  3db is just a noticeable difference by ear.

Mags

[Magluvin]

Also Brad did a 1 coil input vs 2 coils driving his resonance pendulum and was able to reduce his input with 2 coils to get the same output. So other than the speakers, he has confirmed the phenomenon in a different way where the output was electrical, not sound waves.

Thats my 2 silver dollars.

Mags

[Pirate88179]

Also Brad did a 1 coil input vs 2 coils driving his resonance pendulum and was able to reduce his input with 2 coils to get the same output. So other than the speakers, he has confirmed the phenomenon in a different way where the output was electrical, not sound waves.

Thats my 2 silver dollars.

Mags

OK.

I have two 12 oz. beers here and one 24 oz beer also.  I just drank all of them.

What was the question again?

Bill

[memoryman]

Was that American beer, Bill?

"Also Brad did a 1 coil input vs 2 coils driving his resonance pendulum and was able to reduce his input with 2 coils to get the same output. So other than the speakers, he has confirmed the phenomenon in a different way where the output was electrical, not sound waves.
Thats my 2 silver dollars." Define 'output' units and measurement protocol.