Raptor Aircraft Raptor

The Raptor is a four to five-seat single-engined canard-wing homebuilt light aircraft, whose prototype is under development by Raptor Aircraft of Ball Ground, Georgia, United States. The Raptor's tricycle landing gear is fully retractable, and the streamlined pressurized airframe is optimized for a fast cruising speed at high altitudes. The aircraft is intended to be supplied in kit form for amateur construction. 
The aircraft's designer is Australian Peter Muller, whose design goals are to provide a fast, spacious aircraft with IFR capability. Muller intends that the kit will be sold "at cost".
The prototype made its first substantive flight on 10 October 2020.
Design and development.
The Raptor is a canard design whose main wings have no flaps, a feature which may extend landing and take-off distances, but whose reduced drag may allow higher speeds and reduced fuel consumption. Instead of a fuselage-mounted fin and rudder, each main wing has a winglet and rudder. The tricycle landing gear is fully retractable. The aircraft has been designed (following the area rule) using CAD techniques, and is constructed primarily of carbon fibre, glass fibre and epoxy. The Raptor is to be powered by an Audi 3.0 TDI automotive conversion driving a constant-speed pusher propeller and giving a design cruise speed of .
The company makes a point of favourably comparing their aircraft against the Cirrus SR22, which has been the world's best-selling general aviation airplane every year since 2002. Raptor Aircraft claim that its plane, compared to the SR22, will be roomier, with a much higher speed, much lower drag, much better economy, and a much lower purchase price. The "finished and flying" price, including engine, is intended to be under US$130,000, with an intention to bring that below $100,000. Prospective buyers made a $2,000 deposit, held in escrow. By December 2018, 1,500 deposits had been received and the company had stopped taking further deposits. The company does not advertise conventionally; rather it posts regular video bulletins on YouTube to illustrate progress to interested parties.
The company proposes that the Raptor will be suitable as a new air taxi aircraft and for light cargo services and they plan on partnering with a company such as Uber. Also, they propose that a turboprop version will become available in due course. The company claims to be "Changing General Aviation in a Big Way", saying:
 "We are offering a completed Raptor 'At Cost' and Open Sourcing the whole program so universities and businesses will be able to have access to the design and make improvements and modifications in the same way that open source works in the software world. We will be opening the parts and airframe construction, support and flight training so companies world-wide can compete for your business thereby keeping availability high and prices low. This will also ensure that there is no single point of failure for parts, airframes or support. This distributed model will eliminate any chance of the Raptor not having support. Much like the internet, the open and distributed nature makes it virtually impossible to destroy. The competition will have a difficult time trying to stop us."
In an August 2019 video the prototype was weighed at an empty weight of , which is heavier than originally estimated. At a gross weight of the aircraft's useful load is . With full fuel of the payload is .
Flight tests.
The prototype made a short hop on 21 July 2020, during which it took longer to reach take-off speed than expected and cameras revealed the main landing gear legs exhibited a shimmy on landing. Flight testing took place after those issues were addressed. 
The first real flight took place on 10 October 2020 at Valdosta Regional Airport. The aircraft experienced oscillations in yaw and pitch. Also, oil and coolant temperatures were quite high, and climb rate was less than expected, so Muller landed on runway 04 before completing a full circuit. Muller felt that the issues could be caused by not having raised the landing gear, which increased drag and not having the coolant air intake fully open.
On 4 February 2021 during a test flight, the Raptor experienced an oil leak followed by an engine failure caused by an out of position oil seal. The aircraft was glided to an uneventful landing with minor damage from runway contact by one wing tip. During post event testing it was discovered that the #2 cylinder wrist pin had failed as well and an engine swap was required.