Messerschmitt M24

Messerschmitt M24
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Type:	Passenger plane
Design country:	German Empire
Manufacturer:	BFW
First flight:	July 8, 1929
Commissioning:	1930
Number of pieces:	4th

The Messerschmitt M24 was a German passenger aircraft produced by Bayerische Flugzeugwerke (BFW) in the early 1930s. It formed the middle link between the smaller and larger commercial aircraft types M18 and M20 of the BFW, but was not a commercial success compared to these and was built in only four copies.

history

Willy Messerschmitt began work on the M24 at the end of 1928 and was largely based on his M20, but downsized the design a little and designed it for a maximum of eight passengers. At the beginning of 1929, the planning phase was completed and the construction of an M24a with the serial number 445 began. The aircraft was ordered by Nordbayerische Verkehrsflug GmbH even before completion, which is why its director Theo Croneiß also carried out the first flight on July 8, 1929. Further testing was in the hands of the BFW works pilot Franz Sido. After correcting some minor complaints with one underwent L-5G - six-cylinder - inline engine of Junkers with 380 hp takeoff power equipped M24A from October of the year, the state inspection and was determined by the type certification by the German Research Institute for Aviation (DVL) with the identifier D–1767approved and handed over to Nordbayerischen Verkehrsflug GmbH on February 25, 1930. After the conversion of the company into Deutsche Verkehrsflug AG , the aircraft became part of their portfolio in November 1931 and was used until 1935 before it was deleted from the aircraft role as "destroyed" .

In 1929 BFW launched a second M24a that the Reich Ministry of Transport had commissioned for the DVL. The aircraft with the serial number 446 received a BMW Va drive with 320 hp and was delivered to D–1853the DVL in Berlin-Adlershof on May 16, 1930 , where it was used as a "flying test laboratory" for testing radio telegraphic devices . Later this M24a should also have received an L 5G.

The last two M24 presented BFW in 1930 on their own initiative probably in the hope of an increasing demand for eight-seat commercial aircraft, and without having received this works, here, and equipped them with more powerful BMW under license from the US Hornet - Star engine off. The two specimens designated as M24b with the serial numbers 515 and 516 had also received somewhat enlarged and rounded tail units and had been reinforced in some respects in order to make the possible uses more diverse. BFW then offered them as a newspaper airplane with a built-in dropping device, as a photo airplane for survey flights, for mail delivery, as a weather airplane for meteorological tests and as an agricultural airplane for pest control. By installing four stretchers, the M24b should be able to be used as an ambulance aircraft and the conversion to a seaplane equipped with floats for the transport of passenger cargo was also considered.

Ultimately, none of these options were implemented; Instead, the Reich Ministry of Transport placed the order for the conversion of the 515, which is currently being accepted by the DVL, to a 436 HP radial engine of the Bristol Jupiter type with a three-bladed propeller and the replacement of the land landing gear with two floats. In this design, the aircraft was to be delivered as M24b / See to Travemünde to the See trial site, which, however, dragged on until 1932, as the required floating mechanism first had to be developed and adapted. The second M24b with the serial number 516 did not find a buyer after the DVL type certificate and remained parked at the BFW in Augsburg for several years until it was finally taken over in 1934 by the now established Reich Aviation Ministry and assigned with the license plate D–UHAMapproved to the Stettin Aviation School .

construction

Like its two predecessors, the M18 and M20, the M24 was an all-metal aircraft in a cantilever , single-spar shoulder -wing construction with duralumin as the main material. The two pilots sat next to each other in a closed cabin located in front of the wing edge, to which the room for the passengers sitting in two rows behind one another was connected. The axleless, spring-loaded main landing gear, like the grinding spur located at the rear, was not retractable.

Technical specifications

Parameter	Data (M 24b)
crew	2
Passengers	8th
span	20.60 m
length	12.80 m
height	4.20 m
Wing area	43.00 m²
Wing loading	70 kg / m²
Preparation mass	1480 kg
Payload	1520 kg
Takeoff mass	3000 kg
drive	an air-cooled nine-cylinder - four stroke - radial engine BMW "Hornet A" (license Pratt & Whitney )
Starting power nominal power continuous power	600 PS (441 kW) at 2000 rpm 525 PS (386 kW) at 1900 rpm 450 PS (331 kW) at 1810 rpm
Top speed	220 km / h
Cruising speed	195 km / h
Landing speed	82 km / h
Rise time	4 min at 1000 m altitude 15 min at 3000 m altitude
Service ceiling	5500 m
Range	800 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} Karl Ries: Research on the German aviation role. Part 1: 1919-1934. Dieter Hoffmann, Mainz 1977, ISBN 3-87341-022-2 , pp. 129 and 135.
2. ↑ Bruno Lange: Type manual of German aviation. In: Die deutsche Luftfahrt, Volume 9 , Bernard & Graefe, Koblenz 1986, ISBN 3-7637-5284-6 , p. 212.
3. ^ Civil Aircraft Register - Germany. Retrieved March 22, 2020 .