" I don't appear to get any sparking if the brushes are oiled correctly, only if allowed to dry out.
I did a test at night without light and no sparking."
There's a very good reason for that (or two😉)!
Mainly, the diode bridge that I used in the reverser box (to provide forward and reverse with a standard modern ESC) suppresses the sparks😊😀
I should have a test run video and scope traces somewhere (on an old PC) that show this effect. I'll rummage around.
Also I machined and polished the commutator and brush ends for the best possible continuous contact.
I trust that the ball races I fitted will also help to reduce friction and jack up the efficiency a little and thus reduce the current drain a bit 🤞
Very happy to hear (at last!😉) that my efforts (from a corroded 'block' to a humming motor) were not in vain.
Thanks for the credits in your posts 👍 I had fun doing it but was glad that I had previously practised on my Target.
My little Taycol Target which I converted before your Supermarine also does not spark.
I'll see if I still have the photos and test run videos that I made during the two conversions. Some info on the Target conversion is in my Sea Scout Jessica Blog in case anyone else is interested in going this route.
Very nice to finally see the Commander afloat.
Well done. Happy sailing.
BRAVO ZULU THAT MAN
Cheers, Doug 😎
PS to Dave976 (AKA Dave M) As far I know the brush mesh was from the 1960s. I certainly didn't change it, just cleaned 'em up and squared off the ends.
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