Diamond Twin Star

Diamond DA42 Twin Star / -VI

The DA42 is the definitive modern light twin. Originally introduced with Thielert engines, the current ‘NG’ and ‘-VI’ variants utilize the more robust Austro AE300 diesel engines. It is famous for its ‘single-engine-like’ fuel burn and extreme ease of operation thanks to FADEC (Full Authority Digital Engine Control). For many GA pilots, the DA42 represents the most accessible path into multi-engine flying without the high maintenance and fuel costs typically associated with legacy twins like the Baron or Seneca.

Key Features for GA Buyers

• Unmatched Efficiency: Total fuel burn is approximately 10.4 - 13.0 gph of Jet-A at cruise, which is comparable to many high-performance singles.
• Single Lever Control: FADEC manages power, RPM, and mixture, simplifying multi-engine operations and emergency procedures (auto-feathering).
• Modern Safety: Features a crashworthy carbon fiber safety cell and a lightning protection system.
• Single Engine Performance: Unlike many older light twins, the DA42-VI maintains a positive rate of climb at high density altitudes even with an engine inoperative.

Trade-offs

• Cabin Width: The cockpit can feel tight for two broad-shouldered adults side-by-side.
• Acquisition Cost: High demand for flight training keeps used prices high and new delivery lead times long.
• Useful Load: While respectable, carrying four adults plus full long-range fuel (76 gal) often requires careful weight management.