Although the big one I built worked ok, I also built a couple of lighter versions as my delta trike had a problem pulling the big one.
Here are the two smaller versions.
This one use a 2.5 ho harbor freight engine and 24v alternator. my delta trike runs on 24v versus 36v like the tadpole trike did.
I had to make a reverse fan for these as the engines turn the wrong way.
Here is the bigger one that uses a 6.5hp - it worked better!
That aluminum foil on the muffler hides a second muffler I built an added on to quiet it down some more and was part of another project that used the engine for a emergency hot water supply. This engine was originally on my big assist trailer and gets swapped back and forth as needed until I can afford to buy a another one.
Lee
