The Eclipse 400 (formerly Eclipse Concept Jet, or ECJ) is a single-engine very light jet that was designed by Eclipse Aviation and Swift Engineering. A development of the Eclipse 500, the Eclipse 400 prototype first flew in 2007 and was cancelled when the Eclipse company went bankrupt in 2008. Design and development The Eclipse 400 was first publicly unveiled on 23 July 2007 at AirVenture as the Eclipse Concept Jet (ECJ). The aircraft was intended to compete with the Cirrus Vision SF50, the Piper PA-47 PiperJet, the Epic Victory, and the Diamond D-Jet in the single-engine jet market. The Eclipse 400 design featured one engine, four seats and a V-tail similar to the Cirrus Jet. The four-seat prototype, registered N5184U, is powered by a single Pratt & Whitney Canada PW610F turbofan, first flown on 2 July 2007. It was built in complete secrecy at NASA's Wallops Flight Facility in Virginia by Swift Engineering and BaySys Technologies. Swift Engineering had been tasked with designing and building a single-engine business jet in just 200 days, up to the aircraft's first flight. The prototype aircraft has 60% parts commonality with its larger Eclipse 500 sibling. At the time of its announcement the company said that the aircraft would have an expected cruise speed of at with an IFR range of . The aircraft was designed for a gross weight, empty weight, useful load and a fuel capacity of . When the prototype was initially unveiled the company said that it did not intend to produce the aircraft. Eclipse CEO Vern Raburn said: On 30 May 2008, Eclipse Aviation began taking orders for a production version of the ECJ, the Eclipse 400. The 400 was at that time priced at $1.35 million and deliveries were expected to begin by the fourth quarter in 2011. At AirVenture in July 2008, new Eclipse CEO Roel Pieper confirmed that if sufficient orders were placed for the 400, production would commence in 2011. Pieper also stated: "If there's not sufficient interest we'll give their (deposits) back...The 400 will get a very specific program. It will not be allowed to influence the 500 in any way." In August 2008 in a communication to position holders, the company indicated that development of the Eclipse 400 was on hold. In October 2008 when asked "if the Eclipse 400 project was a go or not, Eclipse said it has not begun the