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Now that would be cheating, wouldn´t it?
Besides, theres not much point in using an electric motor driving the 3-phase alternator, rectify, chop it up to AC again and via a transformer get the volts´n amps at suitable freq.
There is a pricetag on high amp. HF switching components that makes it ...

A friend who welds al-alloys every day for a living is visiting over x-mas, maybe something useful may come out of our late night brainstorms.
At least he can add some do&dont´s when i comes to al-welding.

Actually, when it comes to DC welding with car alternators the best thing to do is to deltaconfigure the windings for max current capacity and replace the rectifier with external diodes capable of handling both the current and the higher OCV.
However, the question was how to get 1-phase AC (needed ...

In this case the point was to get one-phase ac from a 3-phase alternator to use for welding.
As long as its dc-welding theres no problem, but if ac is required (Al) one has to find a way to distribute the load over all 3 phases.
This way to solve the problem adds alot of weight to the ...

I finally found some of my papers about phase conversion.
Maybe someone has already written about it, but heres what i found.

It's easy to get fooled by the magnetic flows i a 3-phase transformer.
Actually it works just like 3 separate transformers, one for each phase.
It's ok to make a 3-phase ...

One of the "start-kabooms" my little engine makes would crack just about anything.
I even thought my bedroomwindow was in danger when i first started it 4 meters away.
But i may consider cheramic coating on some hot-spots.

Something tells me you have not realised the unexpected things plain one-colour anodizing may have to surprise you when you think things are OK ;-)
But it's fun to anodize, thats for sure.
Sometimes it even looks nice too.

Another name and a regulated powersupply will make things easier.

Oilburnerpump?
It can give you all the pressure you will ever need.

I have found the location of the sparkplug to be critical sometimes due to variations in fuel/air mixing at different points in the engine.
Now i use "sparkprobes" when testing and it makes it very easy to find the right place for the sparkplug.
However, none of my probes have survived for any ...

I'm pretty sure the answer is hidden somewhere in the forum-archives at www.diywelder.com But i haven't had the time to read it all.

Actually not entirely fruitless.
The pat. appl. number on the picture did lead to som documents in one of the searchable patent archives (cant remember the url, but i may still have it somewhere) .
Unfortunately they were in some special-TIFF format requiring a viewer that for some reason didn't ...

Bruno, do you have any ideas where i could find more about the McCOLLUM monster?
My websearches have been fruitless.
Did it ever get out on the market.
If it was just a "brainfart", it sure was a most beatiful one!

I´m afraid i dont have any news more than a short note about 3 to 1 phase transformers.
I asked a friend who went to the same school as i did years ago and he remembered the same thing.
Anyway, a deepdive into his piles of books gave nothing.
There is one more person i can think of that could have ...

Good luck !
I'm sure you will get the attention from even the most uninterrested in the audience.
I know everyone who for the first time really feels a sound (cutting through their bones and brains ;-)) will remember it for quite some time.
That's one of the things that make pulsejets so special.