At the Wessex SEC D-Day crank up on Thursday, there was a generator of a type I've not seen before. A small JAP industrial engine (throttled not governed) drove two 12 volt car dynamos (not alternators), one direct drive, the other vee belted from the shaft.
Photos here ........The last photos in this album.
The engine & dynamos are enclosed by a professional-looking steel tube framework and a properly constructed panel at one one supported a couple of boxes, one a standard Lucas FADE regulator & the other an aircraft 24 volt box. There appears to be a diode (possibly a Zener) added on to one of the bolts.
The interesting thing is that it produced 240 volts - or at least had done a year ago. On Thursday it just produced noise & exhaust gas!
Rob Armstrong commented that he recalled seeing an article in an amateur mechanics magazine just after the war which explained how to rewind a car dynamo to be an alternator. He'd done so, eventually getting 110 volts out of it - but it didn't last long!
If this is one of they, why two dynamos? & if it isn't why two dynamos at all?
Any information would be much appreciated by both myself & the owner.