339 tricolore, amazing work, absolutely amazing. I can only imagine the hours and days of intense work it took to build these engines, although in the end a tremendous accomplishment.
Reverse thrust too! That is some of the best model engineering work I have ever seen. Looks like a real JT8 thrust reverser bucket.

So, does the longer engine have an axial compressor?
I would love to see closer pictures of your engines, especially the compressor and turbine, they look to be of unique design.
Keep up the good work, and keep the pictures coming...........I will post more soon.

Andy