Engineered Propulsion Systems Graflight V-8
The Graflight V-8 is an aircraft diesel engine developed by Wisconsin-based Engineered Propulsion Systems Design The Graflight V-8 is a liquid-cooled, flat V-8 with steel pistons and compacted graphite iron crankcase for better strength and durability than aluminum at similar weight, increasing time between overhauls to 3,000 hours. It is managed by a Bosch ECU and can run on Jet A, JP-8 or straight diesel fuel. It is intended to be used in general aviation airplanes, small helicopters, military drones, small boats or troop carriers. The engine is specifically targeting the Robinson R44, Beech Bonanza, GippsAero GA8 Airvan, Cessna TTx and Cessna 206 as possible applications. The design is a , 4.3-liter engine with steel pistons, connecting rods, and crankcase to improve reliability. At , it weighs more than a conventional aircraft engine, not including the radiator for cooling. It should be 30-40% more expensive to purchase than a comparable avgas engine, but with 30-50% better fuel economy. Its low vibration levels allow the use of composite or aluminum propellers. The engine's 17:1 compression ratio gives it a best brake specific fuel consumption of less than , compared to typical avgas engines with . It is expected that the Graflight