Eco Friendly Flight, 30 Miles per Gallon!! - More Mileage than your SUV !! 

I'm a retired military pilot and am very impressed with your product! Best of luck!

Meaning the smaller US Gallon I would assume? LOL! Great plane!

Come on guys! S C A M. This aircraft will never ever come even close to the claims. I fly a comparable aircraft. Here is why: 1. cooling drag: the extreme turbocharging needed to fly at 55’000 ft causes massive drag challenges. This was the reason why towards the end of WW2 piston engines were abandoned in favor of jets. A secondary drag problem is caused by pressurization: thus air also needs to be cooled. 2. pressurization risk: a single piston engine as source of pressurization for commercial flight is too dangerous. It will not get certified. Period. 3. climb performance: this plane has too little power (550HP) for its expected weight ( my: guess north of 5 tons). My aircraft which weighs only 2 tons and has 350 HP needs 20 minutes to 20’000 ft and its power/ratio is 60% better. The Celera needs to cruise around 55’000 ft to deliver the economy. It will take 2 hours to get there.... 4 Icing: my airplane also has a laminar flow egg-shaped fuselage (nothing new here btw). Whenever we punch through an icing layer and the fuselage collects a sandpaper-like layer of ice, performance is severely affected. An aerodynamics teacher once told us: the science of subsonic, propeller driven flight is closed, all of the principles (hint: including laminar flow) are well understood and correctly computer-modelled. anyone claiming more than marginal progress is implying that the designers before them were incompetent. You decide if this makes sense.

The Diesel engine version would be Excellent, The Scam of Gullible Warming is well dead !!