You must measure the inductance . I do it with a cheap
HPS-10 O'scope and a low power
DIY pulse generator .
you can figure anything in a few minutes .
In an emergency , you could spark a battery
across the unknown wires . If the battery is
big , limit with a resistor , this will trigger
the scope , do it 10 times .
Throw out all the readings that are not similar .
You have characterized those wires , it only takes
me seconds to figure a 60hz or a D.C. motor/circuit .
Of course you must have experience .
I look at the size of a motor , try to guess , is it Series-
or a stepper , or a treadmill motor ( 100 VDC , slow , multiple
poles on each field magnet ) .
You must have these characteristics as images , in your head ,
or you'll just waste time .
When you use a battery and R , only , you cant see the
in inductance aka Inductive reactance aka resistance at fast rise
So , dont guess at wiring til you have a low cost
pocket O'Scope hooked up .
The old HPS-5 , uses a simple 64 by 128 , NO backlite
But B.G. Micro sold me 50 LCD's ,
when i get time , i'll hook 10 LCD's to HPS-5
, with a DE-MUX , so the scope thinks its got
one LCD , but signal is sent to 10 LCD's in sequence
every microsecond , the "next" sequencial
LCD gets the data . This is one really long time base !
HPS-10 uses a diff type , i cant find it .
When i get time ill DIY power supply to push up
ground on HPS-10 , cause to read D.C. voltages
is a pain . Good scopes can turn a knob ( D.C. offset aka vertical
position ) ..
It has an mcu , so why cant it compare the 2 peaks and
read out the frequency ! Lame programmers at
BTW dont buy model 518 from Longevity-inc.com ..
Mine broke MOSFETs quick .
Fooled ya , 518 is no longer sold , it has a design defect .
They wont return my money , they offer to change MOSFETs
til its just outside of warranty , then ....
ALSO looking for tapered rollers . Google charges to list
sellors ... NO , they dont have one sellor . I wasted
Need a high angle ( 5,6,7 ) tappered roller , I.D. = 2.75 or
3.0 for aircraft propellor hub* .
DIY airplane did a redesign , it now folds to 8 foot , for
loading into 65 foot motor-sailer .
For years , i pained over dinghies ,
but a pontoon plane ( 2 pushers ) is more convenient .
Pontoons are wide spaced , and wings fold forward .
Propellors must be light wieght . DOM tube is light , and
unlike aluminum , has no lower limit , in fatigue .
Steel has a limit , below 44,000 psi , steel makes a good
spring , it will NOT fatigue crack . Aluminum WILL fail ,
it has NO lower limit . Think about that , next time you fly .
Maybe thats why they dont make planes ,
w/ "structural" skin . Its under your feet , huge I-beams and
and formers ..
Anyone have numbers for the carrier tapered rollers from
10 ton trucks ? They make good lathe head bearings .
Another silly arguement from a racer , he said a motorcycle
engine cant make 10 HP and win a economy race .
The waste in a car engine is reciprocating losses , the oil
heat indicates ...
But Yamaha / Honda 60 cubic inchers , have such light
wt pistons , pins , rod ( upper 50% )
they can run at 8-9 thou and win econo races , at 10 HP .
Simply retard intake cam 51 degrees ( Honda car i-VTEC has
51 Degree retard ) . It nixs pumping losses .
The scream from R1 yamaha is mostly the strate cut primary
gear , teeth cut into one of the crank wheels . Old bikes ran clutch
at 33% , pocket rockets cant , need about 60-70%
They must speed up the clutch or burn the C' in minutes .
They are slowly moving toward friction plus dog , as soon as
the RPM is matched close , dogs engage , take load off
friction plates , stop slipping .
My XR650R will get 2 air cylinders on rear . spring has NO
its only one "rate' .....
A common car shock is rervalved to pump oil one way , is located
inside air cylinders .
This transfers to air pump. no matter how little you bounce ,
every bounce , you pump 200psi air into tank
Reverse the coolant flow , it MUST enter head , near exh valve .