The Extra EA-400 is a six-seat, single-engined, high-wing monoplane produced by Extra Flugzeugbau GmbH. The EA-400 is powered by a liquid cooled Continental Voyager turbocharged piston engine.
Started by Walter Extra, the company manufactures mostly aerobatic airplanes like the Extra EA-300 series. The EA-400 is a pressurized airplane for travelling, featuring carbon fiber construction, a cantilevered high wing, and a water-cooled Teledyne Continental TSIOL-550C engine. This engine is immune to shock cooling during descents, but more demanding to operate.
The airframe was designed with engineering help from the Technical University of Delft in Holland under leadership from Prof. Egbert Torenbeek and with Loek Boermans for airfoil design.
The aircraft's Fowler flaps feature a completely recessed mechanism and reduce stall speed from at maximum weight.
The landing gear was designed and manufactured by Gomolzig in Germany. It is unusual in its geometry and sealed behind doors once retracted. Its complexity contributes to the aircraft's operating costs.
The optional weather radar pod is blended into the left wing tip.All Extra 400 aircraft have been retrofitted with the flight into known icing conditions modification. Deicing equipment consists of Teflon boots, a heated propeller, a heated windscreen for the pilot side, dual heated pitot ports, and a heated stall sensor connected to the autopilot.The deicing equipment is powered by a pair of large alternators (100 and 85 amps) that also feed the AC compressor located in the tail.
The cockpit has good forward and lateral visibility. Avionics are conventional with a full set of instruments for each of the two crew and a central stack.STCs for upgrades to modern GPS navigators and "glass cockpit" displays are available, but the only autopilot certified is the STEC 55X.
An improved propeller with the "b" type blades is available from MT-Propeller under FAA Form 337 Major Modification. It increases climb performance and cruise speed. Time to climb to FL200 is 20 minutes and cruise speed at 75% power ranges from at 16'000 ft to a maximum of at FL 250 (at MTOW and under ISA conditions).
The passenger cabin is air-conditioned and offers four seats in a club arrangement with a folding table. It is similar in size to that of the smaller jets such as the Eclipse 550.
The Extra 400 was costly to manufacture, requiring 16'000 hours of labor, and carried a price tag of $1 million. Only 27 aircraft were built before the company ran into financial trouble.