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[Inkmark]

Hi Guys
Going through some old stuff and found a couple of the old MFA hummingbird motors,
a 20 and a 30, they were used on 6V in my old boats.
However the old grey cells seem to think that max voltage was 9.6V, I seem to remember
the fly boys using 8 cell packs in the early days.
Can anyone shed any light on the specifications and max voltages for these motors please.
I won't actually be using them, this is just for cataloging purposes.
Thanks
Mark