I think we have a language issue here, Starujumper7. "Trike" can mean tricycle gear but autoreply and I were referring to the three-wheeled frames with a pusher engine used with flexible delta wings as microlight aircraft. There was no landing gear restriction in the concept I was describing. ultralajt, you are definitely in the spirit of what I had in mind when we started this thread but safety issue of crashing head first rather than feet first makes me wonder about that arrangement. If maintaining the idea that the pilot should straddle the fuselage then I would tend to go with something like the recumbent motorcycle in post #8, but perhaps just an ordinary open cockpit would be enough.