Hope this helps.[ Parent ]
As you had identical resistance on the start and run windings I assumed that most likely this was what you had. It seems just chance that your resistances are equal in this case and you have a start winding with few turns and wound with very thin wire, possibly capacitor start but just as likely resistance split phase start.
In reality the start winding is virtually useless to you and will contribute very little, the thing is never going to even approximate to a 2 phase machine. Single phase things don't do very well anyway but even so I think you are stalling with the main winding. By adding the start winding in series you are doing little more than adding 5 ohms as a form of line resistance and it is bringing you a bit more out of stall.
Without rewinding to a true 2 phase or 3 phase you will not get any great improvement but I still think it will go better at 36v.
Flux[ Parent ]
This brings the cut in speed down to about 190 rpms. At 370 rpm now I get 60vac, instead of 42vac. I'm sure this will limit my amperage a little, but it truly seems like I made this better.
By the way the coils were poorly sodered, so I re-sodered them, which i'm sure will help more amps to come through. I think I read somewhere that some cheaper induction motors the splices from the leads to the coils is sometimes not that great.
I'm going to make a set of 8 foot blades, according to hugh's plans and see how it does. I'll definately try to let you guys know. I think his plans for 8 foot rotor is around 7 or 8, which they should do just fine
I dont think i'm gonna use the start winding at all, it doesn't really seem to do well by itself. Like you said.
Thankyou for your time MMinspired [ Parent ]
This is incredibly slow for a 5ft prop. I am not sure why you are getting best results with such a low cut in speed unless your prop is much lower tsr than you think. Certainly you are more in the speed range of the 8ft prop and whatever happens the large prop will have far more power. I am not sure that such a tiny alternator is going to hold down an 8ft prop so you will need to make every attempt to make it furl as early as possible. In low winds you will be way ahead but you will need to watch it in high winds.
