The Büttner Crazy Flyer (also called the Crazy Flier) is a family of one and two-seat German

powered parachute A powered parachute, often abbreviated PPC, and also called a motorized parachute or paraplane, is a type of aircraft that consists of a parafoil with a motor and wheels. The FAA defines a powered parachute as ''a powered aircraft a flexible o ...

s designed and produced by

Büttner Propeller Büttner Propeller, also known as Gerald Büttner - Obernkirchen, is a German aircraft manufacturer based in Obernkirchen and founded by Gerald Büttner. The company specializes in the design and manufacture of powered parachutes, paramotors a ...

Obernkirchen Obernkirchen () is a town in the district of Schaumburg, in Lower Saxony, Germany. It is situated approximately 8 km southwest of Stadthagen, and 15 km east of Minden. Obernkirchen is a small town in the shadows of the Bückeberg, a h ...

. The aircraft are supplied complete and ready-to-fly, but without wings.Bertrand, Noel; Rene Coulon; et al: ''World Directory of Leisure Aviation 2003-04'', page 80. Pagefast Ltd, Lancaster UK, 2003. ISSN 1368-485X

Design and development

The Crazy Flyer 2 two-seater was designed to comply with the

Fédération Aéronautique Internationale The (; FAI; en, World Air Sports Federation) is the world governing body for air sports, and also stewards definitions regarding human spaceflight. It was founded on 14 October 1905, and is headquartered in Lausanne, Switzerland. It maintai ...

microlight Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with aile ...

category, including the category's maximum gross weight of . The Crazy Flyer 2 features two-seats-in-

tandem Tandem, or in tandem, is an arrangement in which a team of machines, animals or people are lined up one behind another, all facing in the same direction. The original use of the term in English was in ''tandem harness'', which is used for two ...

accommodation,

tricycle landing gear Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...

and a single

Hirth 2704 The Hirth 2704 and 2706 are a family of in-line twin cylinder, two stroke, carburetted aircraft engines, with optional fuel injection, designed for use on ultralight aircraft and especially two seat ultralight trainers, single seat gyrocop ...

engine in

pusher configuration In an aircraft with a pusher configuration (as opposed to a tractor configuration), the propeller(s) are mounted behind their respective engine(s). Since a pusher propeller is mounted behind the engine, the drive shaft is in compression in nor ...

. The aircraft carriage is built from triangulated bolted

aluminium Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. I ...

tubing. The main landing gear incorporates spring rod suspension. A variety of

parachute A parachute is a device used to slow the motion of an object through an atmosphere by creating drag or, in a ram-air parachute, aerodynamic lift. A major application is to support people, for recreation or as a safety device for aviators, who ...

-style wings from different manufacturers can be used.

Variants

;Crazy Flyer 1 :Single seat version powered by a

Hirth F33 The Hirth F-33 is a single cylinder, two stroke, carburetted aircraft engine designed for use on ultralight aircraft, including powered paragliders and ultralight trikes. the engine is noted for its extremely light base weight of . It is ma ...

motor ;Crazy Flyer 2 :Two seat version powered by a

motor

Specifications (Crazy Flyer 2)

References

External links

* {{DEFAULTSORT:Buttner Crazy Flyer Crazy Flyer 2000s German sport aircraft 2000s German ultralight aircraft Single-engined pusher aircraft Powered parachutes