The Diamond DA40 Diamond Star (specifically the DA40-D) is a four-seat, single-engine, composite aircraft manufactured by Diamond Aircraft Industries. It is known for its advanced aerodynamics, fuel efficiency, and state-of-the-art avionics, making it a popular choice for flight training, personal use, and even some commercial operations.

Key Features of the Diamond DA40-D:

Composite Construction – Built primarily from carbon fiber-reinforced polymer (CFRP), making it lightweight yet strong.
Austro Engine (Diesel/Jet-A Option) – The DA40-D is powered by a Austro Engine AE300 (168 HP), a turbocharged diesel engine that runs on Jet-A fuel, providing excellent fuel efficiency and global fuel availability.
Garmin G1000 NXi Avionics Suite – Standard glass cockpit with synthetic vision, traffic/terrain awareness, and advanced navigation.
Efficient Aerodynamics – Features a tapered wing and low-drag airframe, contributing to impressive range and fuel economy.
Excellent Safety Features – Includes airframe parachute (optional) and crash-resistant fuel system.

Performance Specifications (DA40-D):

Parameter	Value
Engine	Austro AE300 (168 HP, turbocharged diesel)
Max Cruise Speed	145–150 knots (~167–173 mph)
Range	~750–800 NM (with reserves)
Fuel Consumption	~6–7 GPH (Jet-A)
Service Ceiling	16,400 ft
Stall Speed	47 knots (clean) / 41 knots (flaps)
Takeoff Distance	~1,000 ft (at max weight)
Landing Distance	~1,000 ft

Variants of the Diamond DA40:

DA40-180 (Lycoming IO-360)

Traditional gasoline engine (180 HP)
Runs on 100LL avgas
Slightly lower fuel efficiency but higher power

DA40-D (Austro AE300 Diesel)

Jet-A fuel capability (better availability worldwide)
More fuel-efficient than the Lycoming version
Turbocharged for better high-altitude performance

DA40 NG (Next Generation, Austro AE300)

Updated version with improved systems and avionics
Optional Garmin G1000 NXi or GFC 700 autopilot

DA40 XLT (2023+ Model)

Latest variant with upgraded interior, lighting, and avionics
Enhanced comfort and performance

Common Uses:

Flight Training – Used by many advanced flight schools.
Personal & Business Travel – Great for cross-country trips.
Survey & Surveillance – Used in special missions due to endurance and avionics.

The Diamond DA40-D is a high-performance, fuel-efficient aircraft ideal for pilots who want modern avionics, diesel efficiency, and a comfortable flying experience. It competes closely with the Cirrus SR20 but stands out due to its Jet-A capability and composite airframe.

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