Super2 has conventional wings, fuselage & empanage, but the cockpit is a monococque of "Supral" superplastic alloy Composite Composite material structures are made of cloth with a high tensile strength (usually fiberglass or carbon fiber, or occasionally Kevlar) combined with a structural plastic (usually epoxy, although vinylester is used in some aircraft). The fabric is saturated with the structural plastic in a liquid form; when the plastic cures and hardens, the part will hold its shape while possessing the strength characteristics of the fabric. The two primary types of composite planes are moulded composite, where major structures like wing skins and fuselage halves are prepared and cured in moulds, and mouldless, where shapes are carved out of foam and then covered with fiberglass or carbon fiber. The advantages of this type of construction include smooth surfaces (without the drag of rivets), the ability to do compound curves, and the ability to place fiberglass or carbon fiber in optimal positions, orientations, and quantities. Drawbacks include the need to work with chemical products as well as low strength in directions perpendicular to fiber. Composites provide superb strength to their weight. Material stiffness dependent upon direction (as opposed to equal in all directions, as with metals) allows for advanced "elastic tailoring" of composite parts. Examples of amateur craft made of composite materials include: Canard designs such as the VariEze and Long EZ designed by Burt Rutan The pusher propeller Cirrus VK-30 designed by Jeff Viken and the Klapmeier brothers The Europa XS family of British two-place monoplanes designed by Ivan Shaw The Glasair I, II and III series of high-performance homebuilts designed by Tom Hamilton Safety The safety record of homebuilts is not as good as certified general aviation aircraft. In the United States, in 2003, amateur-built aircraft experienced a rate of 21.6 accidents per 100,000 flight hours; the overall general aviation accident rate for that year was 6.75 per 100,000 flight hours. The accident rate for homebuilt aircraft in the U.S. has long been a concern to the Federal Aviation Administration. At Sun 'n Fun 2010, FAA Administrator Randy Babbitt said that homebuilts "account for 10 percent of the GA fleet, but 27 percent of accidents. It's not the builders (getting into accidents), but the second owners. We need better transition training." In the US, flight instruction, including primary flight training, can be received in the owner's homebuilt aircraft from any instructor