starting again on a new rotor.
so now i will have two 9" rotors with 8 magnets each. (n42)2x1x1/2"
the stator will have 6 coils. it will be wound with 14awg as that is the wire i have.
still got to do a bit work before i can test a coil for cut-in-speed.
so what i am looking for is a target speed to set out how meny turns i will use.
the prop is a six foot wooden type as like the hugh piggot 8 footer.
i have tested coils with a single rotor before . but now i need to try with a new setup. as others have done with a wood sandwich holding a coil between the two.
it dosent sound easy .
i understand how to work out the voltage . 15.9v.
14.5v +1.4v for rectifier loss = 15.9 v.
so each coil wants 2.65 v.
joined as star.
i can do that ok but im not good at the maths for getting the prop rpm. needed for cut-in.
also is there a way to measure amps from a test coil.
also if i connect up all the coils joining the starts to the finish
then measure the ohms. if i am getting less than 1.5 ohms is that a good thing.
or dos it need to be less.
the multi meter i have the lowest reading for ohms is 200. is this suitable for what im trying to do.
as im not well up in this type thing before i was using the wrong setting.
getting the hang of it a bit more now.
i also have a analogue meter. that looks like the lowest reading is one ohm.
but i cant make sence of it.
if i used a speed of 330rpm on a lathe would that look like a good speed to
work from.
any tips or advice would be great . a cut in speed much better.
im sorry im no good at the maths bit or i wouldn't need to bother anyone here.