Akaflieg Munich Mü 28

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Akaflieg Munich Mü 28
Akaflieg Munich Mü 28 at the German Aerobatic Championships 2012 in Koblenz / Winningen
Mü 28 with extended air brakes
Type: Glider aerobatic
Design country:

Germany Federal RepublicFederal Republic of Germany BR Germany

Manufacturer:

Akaflieg Munich

First flight:

1983

Number of pieces:

1

The Akaflieg Mü 28

The Akaflieg München Mü 28 is a glider of the student flying group Akaflieg München , which is designed for use in aerobatics . Alongside the Lo 100, it was one of the few gliders that were optimized for aerobatic maneuvers.

history

Since the flight characteristics of the usual pattern Lo 100 for glider aerobatics in some attitudes - especially in inverted flight  - were unsatisfactory, the students summarized the end of the 1970s the decision to develop its own glider. The Mü 28 was able to take off on its maiden flight on August 8, 1983 and had to reach speeds of up to 400 km / h in the course of flight tests. This makes it one of the fastest gliders in the world.

construction

Akaflieg Mü 28

During the construction, assemblies of the glass wing 303 Mosquito were used, including the fuselage, parts of the cockpit, the controls and the landing gear. The tail unit, which comes from the SF 34 disc , has been reinforced for the projected load factor of +/− 10 g .

For the wings , it was decided to use a symmetrical Wortmann profile , which has the same properties in normal and inverted flight.

One of the features of the Mü 28 is the automatic flap system, which was developed in 1973 by the Aachen Aviation Science Association as FVA-21 with the support of the German Research Foundation . For every flight condition there is an optimal flap setting angle depending on the wing loading and flight speed . Since the continuous correction of the angle represents an impossible additional burden for a pilot during the flight, an automatic control system was developed which changes the flap angle depending on the angle of attack of the aircraft. This optimal flap position gives the Mü 28 its very good flight characteristics for aerobatics, as high lift coefficients can be achieved especially in inverted flight. A similar automatic flap system was later retrofitted into a Phoebus and an LS 3 .

use

Since the mid-1980s in particular, the Mü 28, which is flown exclusively by members of Akaflieg Munich, has achieved many sporting successes at championships, world championships and the Salzmann Cup . With the advent of other modern glider aerobatic planes such as the Swift S-1 , the successes decreased, but even 20 years later the Mü 28 still achieved good results.

Technical specifications

Parameter Data
crew 1
length 6.75 m
span 12 m
height ? m
Wing area 13.2 m²
Wing extension 10.91
Glide ratio 27 at 103 km / h
Slightest sinking 1 m / s at 89 km / h
Empty mass 315 kg
Max. Takeoff mass 425 kg
Top speed 380 km / h
Maneuver speed 295 km / h

See also

literature

Web links

Individual evidence

  1. ↑ Mü 28 on the Akaflieg Munich website , accessed on March 1, 2017
  2. ^ Website of the Swiss Aerobatic Gliding Association ( Memento from November 16, 2011 in the Internet Archive )
  3. ↑ FVA 21: Automatic flaps
  4. ↑ Idaflieg report books ( Memento from June 14, 2011 in the Internet Archive )
  5. ↑ Entry on SailplaneDirectory.com ( Memento from March 3, 2016 in the Internet Archive )