RE: Vintage ducted fan (1975)
Motor around $269 from Perth, Speed controller US$100, Batteries Zippy US$80 (X2) for 20C(both from Hong Kong), after approx 30 full run tests NO problems have been found with either speedcontroller or batteries. As I am not running the batteries at max rate the batteries don't even get warm, so they should last quite a while. I had fitted a longer shaft to the motor and then run a bearing in the stator housing but had a failour after a while (10 runs) so I sat down and had another look at the hole setup and came up with what I have now.
Cheers