Diamond Aircraft arrived in style with the DA-42 Twinstar, powered by dual 135-hp Thielert Centurion turbodiesels. The FADEC-controlled, four-cylinder, double-overhead-cam engine promises amazing fuel specifics: 4.5 gph in cruise, making the Twinstar less thirsty than many singles. Diamond has received type approval in Europe and is working toward certification in the U.S. The Thielerts fit into slim nacelles on the Twinstar partly because the engine is laid over on its side, with water and oil radiators on top. In the Twinstar installation, the engine breathes through a single large scoop beneath the propeller. Thanks to its small displacement (1.7 liters), the Centurion engine must spin to 3800 rpm. A reduction drive brings prop speed down to an environmentally friendly 2300 rpm for takeoff. Dry weight is listed as 295 pounds.
New’ Engines Beat, Oshkosh 2004
Key Takeaways:
- The Diamond DA-42 Twinstar is an aircraft powered by dual 135-hp Thielert Centurion turbodiesel engines featuring FADEC control.
- These engines are notable for their unique "laid over on its side" installation, small 1.7-liter displacement requiring high RPM with a reduction drive, and a light dry weight of 295 pounds.
- The Twinstar boasts impressive fuel efficiency, consuming only 4.5 gallons per hour (gph) in cruise, making it less thirsty than many single-engine aircraft.
- The aircraft has already received type approval in Europe and is currently working towards certification in the U.S.
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