Extra EA 300

The Extra 300 two-seater aerobatic aircraft looks like its successful predecessor, the Extra 230, and follows on from the single-seater EA 260. It was born on the drawing board of Walter Extra, a designer and experienced pilot who became the German champion in 1987 on the EA 260.

The first EA 300 prototype was flown on May 6, 1988, and a month later it was perhaps the most popular and most photographed aircraft at the World Aerobatic Championships in Red Deer, Canada.

At the European Aerobatic Championships held in France last year, the German team won bronze medals on Extra EA 300 aircraft, and it is clear that we will meet this successful design at top competitions in the coming summers as well.

Currently, the Extra 300 aerobatic special is built at the Extra-Flugzeugbau factory at Schwarze Heide Airport near Dinslaken, Germany. The factory has only 27 permanent employees and is only able to deliver about 15 aircraft per year, each costing around DM 290,000.

Extra 300 aerobatic plane free plans

Extra 300 RC Plane plans

XPS foam + plywood + balsa desigh with 32 micron laminating film covering

Wingspan: 1 m (39,4")
Length (w/o motor): 912 mm
Flying Weight: 352g
Wing area: 19,32 dm2
Wing loading: 18,22 g/dm2

Extra-300 RC plane 3D model

Materials: XPS foam 3 and 5mm;UHU Por glue; PVA White Glue; Super Glue 502
Balsa wood 4x4mm;970x100x3mm;970x100x2,5mm; Bamboo Skewers: 3x400 mm
Hot Shrink Covering Film 2000*600mm
Oracover Covering Film 60cm*100cm
Aircraft Birch Plywood 1,5 mm
Basswood Plywood 3 mm
Motor: X2305 KV1450 (25g)
Propeller: GWS EP 1047 (Slow Fly)
Receiver: FrSky S6R (12g)
ESC: SunnySky X 18A (9g)
Servos: EMAX ES08D II (9g)x4
LiHV battery: 1100mah 2S 7.6V
Stainless Steel Spring Wire 1,8 mm
Wheels 40 mm
Carbon push rods: 500x2x1mm
Carbon tube: 8x7x500mm
Hinge Linker Nylon Control Horn with Clevis (0,52+0,34g):
Hinge Linker (24mm):
Transparent plastic screws (M4x45)
Thumb Screw Bolts (M4x12)

Laser Cut files SVG/DXF

Download PDF,SVG/DXF (€7) в pубляx
Download free example

Extra-300 RC Plane laser cut files Nose can be made as usual from 3 pieces of 5mm foam without vacuum forming Extra-300 RC fuselage Extra 300 rc plane wing

Removable tail

removable tail

How to make video tutorial

Extra 300 rc plane plans Extra 300S aerobatic plane free plans

Extra 300 S (single-seat version)

TECHNICAL DESCRIPTION:
The Extra EA 300 is a two-seater mid-plane self-supporting aerobatic aircraft with a three-bladed propeller and fixed landing gear.

The zero-sweep, zero-sweep wing features a symmetrical airfoil with an elliptical front designed by Manfred Schliewa. The structure of the wing is mainly wooden, reinforced with carbon fibers due to the stress during turns. It is very light — the entire wing weighs only 80 kg, of which 27 kg is for the support system. The smooth surface of the wing, above which only the nozzles of the fuel tanks protrude, is given by a rigid coating made of composites. The large ailerons are equipped on the underside with unusually effective counterweights carried on steel tubes to reduce steering forces.

Hull. The lattice structure welded from steel pipes is covered with removable aluminum panels in the front part up to the cabin and on the back of the hull, the surface of the rear part of the hull is covered with canvas. The two-seater cabin with seats behind is protected by a one-piece cover made of organic glass, hinged to the right. Windows to improve the pilot's orientation during takeoff and landing when visibility is poor from the airplane are located in the sides of the lower part of the fuselage and in the cabin floor.

The interior of the cabin is equipped to the point of spartan simplicity: the backs of the simple seats are made of bare plywood boards, the foot control pedals are without calipers. Some pilots who had the opportunity to fly the Extra 300 lacked a variometer and a transverse inclinometer on the dashboard, and were also bothered by the impractical location of some control levers.

The tail surfaces are self-supporting. They have a wooden structure reinforced with carbon fibers and a rigid composite cover. The balancing plate is located on the right half of the elevator.

Landing gear. The main undercarriage wheels under the long drop-shaped aerodynamic covers are fixed on self-supporting legs from a continuous leaf spring of an aerodynamic cross-section, the steerable spur wheel is also supported by a long leaf spring. The main wheels are equipped with hydraulic brakes.

Power unit. The six-cylinder Textron Lycoming AEIO 40L-1B-5D engine in a boxer layout with an output of 224 kW at 2700 rpm drives a three-blade right-hand propeller MTV-9-B-C200-15 with a diameter of 2 m. The fuel is carried in two wing tanks with a volume of 1201 each, a tank in the front part of the fuselage with a volume of 401 is used for aerobatic performances.

Coloring. Most of the delivered aerobatic aircraft are sprayed on all surfaces with bright, colorful colors. The most common combination is a dark blue back and lower body, complemented by a bright red stripe on the sides, separated by thin white lines. Blue stripes or wedges are also found on the top and bottom of the white painted wing, usually in combination with red accessories. For example, German aircraft with registration plates D-EIWE and D-EDCM are colored this way, differing only in the location of the registration plates. Dirk Sonderman from Hamburg is the owner of an Extra 300 serial number 025. His aircraft is painted bright red on all surfaces, with white D-EREK license plates on the sides of the fuselage and a small German flag on the stabilizer.

Technical data and performances: WingSpan 8.0 m, length 7.12 m, height 2.62 m; bearing area 10.22 m2; load per unit area: basic version 88.8 (aerobatic two-seater version 81.3, single-seat version 76.6 kg/m2; empty aircraft weight 610 kg, take-off weight 950 (870,820) kg; allowed multiples of aerobatic two-seater version ± 8 g , single-seater + 10 g; maximum permitted speed 408 km/h, recommended turning speed 293 km/h; rate of climb 18.3 m/s; take-off length 250 m.