I'm sure there are many ways to do it and make it work.
Simplest and easist for me is just rectify all genny outputs and either series or parralel the DC outputs, depending on various things. I was doing smaller almost matching units though. Getting into larger units may be a bit more to think about.
I posted on here maybe a year or two ago I was thinking about an airplane gennie. I never finished it yet, time and parts for it problems, but I have not gave up either
This airplane gennie I have been working on is to make real power, but also alot for decoration at the same time. Basically it will resemble a 4 engine aircraft, 2 gennies on each wing, the tail section will be the furling of course using the planes Rudder.
This gets me 4 small gennies on 1 tower when done, I may even get fancy and use colored LEDs as running lights on it to show when it's making power.
Now that I have some of Riches CNC wood blades, and Jerry blades I can further test things. I had 2 treadmill motors and 2 EFKA 3phase DC motors, but not 4 of the same motors as wanted which has been the biggest hold up, finding matching motors cheap that make power and are light weight.
Now that I also have the #29 type arcs I may just build 4 garbogens the same which would be far better in many ways.
Each genny though we be rectfied on the tower and then parraled or seriesed depending on the gennies and power output of them in average winds. 1 set of wires down the tower. This is one reason I am looking also at series, higher volts for smaller wire since it will have to be DC comming down the tower.