We Are Green
The Graflight V-8 is the greenest engine on the market, as shown in the graph below, which charts the CO2 emissions for ten different GA engines. These engines fit into three distinct categories: Avgas engines, as shown by the solid and dashed black curves, which require the abrupt fuel consumption increase at 262.5 horsepower to prevent destructive detonation and pre-ignition; turboprop engines, as shown by the single dotted black curve; and diesel engines, as shown in the remaining 7 colored curves.
This graph shows that at optimal cruising speed, the Graflight V-8’s output of CO2 is 30 percent less than comparable Avgas engines and 17 percent less than comparable diesel engines, using conversion values provided by the U.S. Energy Information Administration to convert fuel use into CO2 output at the rate of 18.3 pounds per gallon of Avgas burned and 21.1 pounds per gallon of Jet-A fuel burned. Operating at 260 horsepower, for example, the Graflight emits 238 pounds of CO2 per hour while the Continental TSIO-550-E emits 341 pounds. At 150 horsepower, the Graflight V-8 emits just 130 pounds of CO2 per hour, nearly 19 percent less than the next best diesel engine, the Austro AE 300, which produces 160 pounds.
By manufacturing the most efficient diesel engine, the Graflight V-8 is by its very nature green, clean and better for the environment than the competition. It runs on lead-free Jet-A fuel, which is available worldwide. The standard Lycoming and Continental engines that operate in the majority of GA airplanes today run on Avgas fuel, which is not only more expensive, it is also only available in the United States and Europe and contains lead contaminants that many believe are harmful to the environment. These standard Avgas engines require massive increases in fuel consumption above 263 horsepower, which also greatly increases their CO2 output at high cruising speeds. The Graflight V-8 does not suffer this setback; fuel consumption correlates directly with power, so if the plane increases its speed there is only an emissions increase based on the additional power required to balance against the drag increase of the higher cruise speed.