Longbikes, "Slipstream" Recumbent with Golden Eagle Bike Engines 35cc 4-stroker Robin/Subaru. 70Km per litre, cruise 35Kmh+.
Superlative comfort for all-day riding.
Sadly, I had to grudgingly give it up. Was hard for me to get it going and metropolitan visibility was not the best, so I went to a CF style bike as being best of both worlds.
The bent was great once I was moving and comfy, but could not abide driving in city without being able to see and turn easily.