>> I have an exceedingly cheap and cheerful petrol motor powered
>> alternator rated at about 700 watts max. (Cost about $US65 new).

> The old school solution is a Big flywheel.

Mechanically that's not an option due to the tightly integrated nature 
of the design, Electrically, that's what the unloaded motor used as a 
"spinner" does in the 3 phase version of this - it provides an 
electromechanical capacitor which transfers power to / /from the 
rotating motor inertia. Single phase version is liable to be less 
suitable.

The "rent / borrow / steal one" option was not mentioned as I was 
looking at how to use the one I had BUT we have a larger unit reserved 
at the local hire outlet. Cost for half day rental would be not vast - 
about the same as the cost of my unit :-) - but much less work for me 
of course. But there's also no certainty that it would perform well 
enough - although it's far more likely to.


        RM

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