Extra 230 aerobatic plane

Acrobatic specials with the Extra brand are not missing at any major aerobatic competition. The first type of the successful series of aerobatic machines — the Extra 230, was created in collaboration with the very good pilot and designer Walter Extra and the Swiss representative in aerobatics, Erick Muller. Designed for high performance from the start, the Extra 230 took off for the first time on June 14, 1983. It was the second machine produced with the registration number D-EJNC, the first produced shortly after. The planes were a success, and so the third produced machine was purchased by the Swiss aerobatic team. At his debut at the 1984 World Championships in Békéscsaba, Hungary, Erie Muller finished sixth overall with him. A year later, the Extra 230 was also presented at the European Championship in Hosín, where Muller finished third and defended this position in 1987 at the EC in Spiechersdorf, Germany.

The success of Extra 230 did not go unnoticed, so it also appeared in the livery of other acrobatic teams, for example American or Belgian. A number of leading, especially European, pilots liked them very much, and some still fly them, even though they are among the machines with a less powerful engine.

Extra aircraft are manufactured at the Extra Flugzeugbau factory located at Schwarze Heide Airport near Dinslaken, Germany. Not only ready-made machines, but also kits are supplied.

Extra 230 Plans

Extra 230 aerobatic plane plans

Technical description:
The Extra 230 is a single-seat aerobatic mid-plane of mixed construction with fixed two-wheel landing gear and spur.
The wing of an all-wood construction with a zero angle of attack has no uplift. The rigid plywood cover is covered with Ceconit fabric. On the outflow part, there are large wings equipped on the lower part with a counterweight on a steel tube to reduce steering forces. The aileron control mechanism is easily controlled by the plexiglass lids on the underside of the wing. The symmetrical wing profile with an elliptical leading part is MA 15S at the root, MA 12S at the tip.

The hull of the lattice structure is welded from high-strength steel tubes. The front part up to the rear edge of the cabin and the rear dorsal part are covered with duralumin sheet. Individual panels are attached with screws with cross grooves. The rest of the hull is covered with canvas. The cabin cover is one-piece, molded from organic glass. It folds to the right side. It is complemented by windows on the sides and on the bottom of the fuselage, which make it easier for the pilot to check the position.


The tail surfaces have a construction of welded steel tubes with sheet fins. They are covered with canvas. Due to the heavy load during flight, they are reinforced with profiled steel wires. On the left half of the height rudder there is a lightening plate (fletner), on the right half there is a balancing plate (trimer).
The landing gear consists of a two-wheel fixed landing gear with a spur. The hooded undercarriage wheels are fixed on the undercarriage leg — a leaf spring made of duralumin or laminate. Each chassis wheel is independently hydraulically braked. The spur on the leaf spring is therefore not steerable.

The engine group consists of a four-cylinder Avco Lycoming AEIO--360-A1E boxer engine in De Mars modification with a power of 149 kW. It drives a 1.93m diameter Muhlbauer fixed two-bladed propeller with composite-coated wooden blades. The leaves are fixed in a McCauley hub. The propeller cone is the same brand. The electrical equipment consists of a 12V battery.

The coloring is individual according to the customer's wishes. The second built Extra 230 with license plate D-EJNC has a white base. The upper part of the fuselage including the SOP, wing leading edge and VOP is dark blue. It is separated from the white by two blue stripes, which are a shade lighter. The license plate on the SOP is white. Above it is the flag of the Federal Republic of Germany, in which, however, the yellow color is replaced by gold. The propeller cone is dark blue, the propeller blades are white with red ends on the front side, matte black on the other side. On the engine cover, there is a dark blue Extra 230 inscription in the lightest blue stripe. The chassis legs, including their aerodynamic covers, are in the original metal color.

Specifications
Span 7.4 m; length 5.82 m; height 1.72 m; empty weight 440 kg; maximum speed 407 km/h; stall speed 72 km/h; rate of climb 15 m/s; maximum allowed multiples +/- 10 g.