Can you link two same spec generators together to double the wattage?

I have two nearly identical unregulated Honda 2.2kva generators.

The only difference between them is that one can do 230v and 115v

While the other can do 115v and 57v.
The alternators are identical besides their winding count.

What I want to know is if I can wire the 230v alternator for 115v in parallel, and then wire the 115v alternator for 115v by wiring the two 57v winding in series. Then wiring the alternators together in series for 230 again but higher wattage?

Will it also change the output Hz from 50 or remain the same with two generators running at 50Hz?

And what would happen if one generator cutout? Would I need to make some automated switch off circuitry?

Also if this can't be done, I'd like to know the physics behind it as I'm always willing to learn!

Cheers
-Eddie

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