Messerschmitt M28

Messerschmitt M28
Type:	Mail plane
Design country:	German Empire
Manufacturer:	BFW
First flight:	1931
Commissioning:	-
Number of pieces:	1 prototype

The Messerschmitt M28 was a German civil aircraft that was developed at the beginning of the 1930s by Bayerische Flugzeugwerke under the direction of Willy Messerschmitt as a special cargo aircraft for airmail traffic , which was becoming increasingly important at this time .

history

The construction took place in response to a tender by Luft Hansa from 1929 for a high-speed aircraft for the transport of mail, which should serve its routes between the European capitals. They demanded, among other adjacent seats of pilot and aircraft mechanic and a top speed of 260 km / h to a predetermined, of BMW manufactured under license Hornet - radial engine as a drive. When planning the aircraft, which was designed by Focke-Wulf as a parallel draft to the A 36 , they were based on the M18 , M20 and M24 commercial aircraft built by Messerschmitt and therefore initially designed it as a high - wing aircraft . After detailed performance calculations, it was decided to build the type as a low-wing aircraft. The only model produced with the serial number 527 received the license plate and began its flight tests with Franz Sido in mid-January, according to other sources in February 1931. The tests showed satisfactory performance, the conditions of the Luft Hansa with the exception of the relatively high due to the high wing loading Landing speed largely met. Since the client had meanwhile come to the conclusion that their requirements did not allow a sample that was optimally tailored to the intended use, the program was discontinued in 1932 and the M28 was handed over to the German Aviation Research Institute , which it used in its headquarters in Berlin-Adlershof for extensive strength tests used. It was later added to the German Aviation Collection in Berlin. D–2059

construction

The M28 was an all-metal aircraft in a cantilevered low-wing design. The seats for the two-person crew were arranged slightly offset in the cabin. The wing had to the level of the wing spar a planking Duraluminiumblechen and behind it was covered with fabric. The main wheels of the non-retractable and axleless landing gear were provided with aerodynamic panels and there was a grinding spur at the rear.

Technical specifications

Parameter	Data
crew	2
span	15.50 m
length	10.00 m
height	3.00 m
Wing area	25.60 m²
Wing loading	107.4 kg / m²
Empty mass	1160 kg
Payload	1590 kg
Takeoff mass	2750 kg
drive	an air-cooled nine-cylinder - four stroke - radial engine BMW "Hornet" with 525 hp (386 kW)
Top speed	260 km / h
Cruising speed	220 km / h
Landing speed	90 km / h
Rise time	3 min at 1000 m altitude 12 min at 3000 m altitude
Service ceiling	5200 m
Range	2450 km

literature

• Hans J. Ebert, Johann B. Kaiser, Klaus Peters: Willy Messerschmitt - pioneer of aviation and lightweight construction. In: German aviation. Volume 17, Bernard & Graefe, Bonn 1992, ISBN 3-7637-6103-9 .
• Manfred Griehl: Messerschmitt. Aircraft since 1925. In: Typenkompass. Motorbuch, Stuttgart 2008, ISBN 978-3-613-02980-4 .
• Karl-Dieter Seifert: German air traffic 1926–1945 - on the way to world air traffic. In: German aviation. Volume 28, Bernard & Graefe, Bonn 1999, ISBN 3-7637-6118-7 .

Individual evidence

1. ↑ ^{a b} Bruno Lange: Type manual of German aviation. In: Die deutsche Luftfahrt, Volume 9 , Bernard & Graefe, Koblenz 1986, ISBN 3-7637-5284-6 , p. 213.
2. ^ Karl Ries: Research on the German aviation role. Part 1: 1919-1934. Dieter Hoffmann, Mainz 1977, ISBN 3-87341-022-2 , p. 147.
3. ^ Reinhold Thiel: Focke-Wulf aircraft construction. Hauschild, Bremen 2011, ISBN 978-3-89757-489-2 , p. 51 (quote from the Bremer Nachrichten of March 2, 1931).