Ahoy, Francesco,

I did two pieces some time back in this forum, about a suggested 'push-pull' twin to aid the development of alternative engines. Pretty much fell-flat. I'm a retired TailHook Naval Aviator, am very familiar with asymmetric thrust, and the serious handling challenge it induces. I strongly suggest that you look at the Burt Rutan 'Boomerang' for inspiration. I've looked at it in a casual way. The articles which discuss the result show that that the concept has considerable merit. It probably could be somewhat simplified, be built in metal, and retain most of the benefits. Enjoy /s/ Bob