Disk Mü 13 E Bergfalke I

Disk Mü 13 E Bergfalke I
Mü 13 E "Bergfalke I" in Schleissheim
Type:	Glider
Design country:	BR Germany
Manufacturer:	Scheiben-Flugzeugbau GmbH
First flight:	August 19, 1951

The glider disc Mü 13 Bergfalke I is a composite construction, self-supporting middle- wing aircraft from the 1950s, which was designed for training and performance flight .

history

The two-seater Bergfalke I , the first model in the “Scheibe Bergfalke” series, was developed in 1951, and the prototype was completed and approved in Austria because of the construction ban that was still in force in Germany after the war. The responsible designer was Egon Scheibe . The construction is based on the pre-war single-seater Mü 13 of the Akademischen Fliegergruppe (Akaflieg) Munich .

construction

The fuselage consists of a tubular steel frame welded in half-timbered construction , which was manufactured and covered with four belts in the front area and three belts in the rear area. The seats are at the same height one behind the other and are provided with a one-piece hood that can be folded away to the side. The fuselage is provided with a bow and center of gravity coupling. A fixed central wheel, which is mounted on a runner with a central spring strut, serves as the chassis.

The wing structure is classically designed with a single spar and divided for easy installation. A special feature is the course of the bending and torsional force transmission between the wings: The rear seat in the fuselage is located roughly where the main spar of the wing (with the unearthed leading edge) is. For this reason, the forces coming from the spar and torsion nose are already "diverted" backwards in the wing via a tubular steel construction and transferred in the fuselage through a tubular steel spar bridge behind the backrest of the rear seat. Both wings were connected separately to the spar bridge. This elaborate construction later led to problems: After an accident caused by overloading a poorly welded spar bridge, the X-ray examination of all welds in this area was ordered first, in the mid-1970s the wings of the Bergfalken I had to be shortened to allow it to continue to be used for two-seater flight. In the Bergfalken 2 , Scheiben already used this spar bridge construction - thanks to the wing arrowhead, the spars could now be connected directly to one another. The tail unit is designed as a self-supporting wooden structure. The fins are covered with plywood, while the oars are covered with fabric. The rudder unit is firmly attached to the fuselage.

Technical specifications

Parameter	Data
crew	1-2
span	17.2 m (shortened: 15.76 m)
Wing extension	15.8 (abridged: 13.4)
Glide ratio	28 at 80 km / h
Slightest sinking	0.7 m / s at 65 km / h
Empty mass	250 kg

Received aircraft

• Flugwerft Schleissheim , D-1085, 1952
• Danmarks Flymuseum , OY-REX, 1952
• German Gliding Museum , OE-0138, 1956

See also

• Disk Mü 13 E Bergfalke I
• Disk mountain falcon II
• Disk Bergfalke II / 55
• Disk mountain falcon III
• Disk mountain falcon IV
• List of aircraft types

literature

• Gerd Zipper: Falkenhorst. The history of the disk planes . Weishaupt, Gnas 1999, ISBN 3-7059-0059-5 .

Web links

Commons : Scheibe Bergfalke  - Collection of images, videos and audio files

• Disc of sailplanes. (PDF; 1.3 MB) EASA.A.099. In: Type-Certificate Data Sheet. European Aviation Safety Agency , February 11, 2016, accessed January 16, 2020 . 

Individual evidence

1. ↑ Disk Mü 13 E Bergfalke. In: collections, gliders. Deutsches Museum, accessed on May 20, 2017 .  
2. ↑ Mü-13E Bergfalke (I) & Mü-13E Bergfalke II. Danmarks Flymuseum, accessed on August 24, 2016 (Danish).  
3. ↑ Disc Mü 13E “Bergfalke”. In: Our gliders. German Glider Museum Foundation with model flight, accessed on May 20, 2017 .