Junkers Ju 46
| Company type | Aircraft model |
|---|---|
| Industry | Aviation |
| Predecessor | Junkers W 34 |
| Founded | 1932 |
| Products | Catapult-launched seaplane (mailplane) |
|}
The Junkers Ju 46 was a German catapult-launched seaplane designed for shipboard use, derived from the Junkers W 34. It was developed to support Luft Hansa’s transatlantic mail service prior to World War II. Introduced in 1932, the Ju 46 succeeded earlier mail aircraft such as the Heinkel He 58 and Heinkel He 12, which had initially established ship-to-shore postal flights.
Design and development
This model represented a strengthened adaptation of the W 34, modified specifically to withstand the stresses of catapult launches. While its external appearance remained largely consistent with its predecessor, the Ju 46 featured a redesigned vertical stabilizer with a wider, rounded rudder that enhanced control at lower speeds during launch sequences. Although primarily configured as a seaplane (floatplane), certain Ju 46 units were equipped with fixed wheeled landing gear and a tail-skid throughout their operational tenure. The aircraft was initially powered by a 441 kW (591 hp) BMW-C radial engine; five examples were produced and subsequently upgraded with more potent BMW-E engines.
Operational history
The Ju 46 fleet operated aboard NDL ocean liners , and , with each plane named after its respective vessel. The first two Ju 46fi seaplane variants entered service in 1932, followed by two or three Ju 46hi models by mid-1933, including one converted from a landplane configuration.
Both ships were outfitted with compressed air catapults capable of launching the 3,200 kg (7,050 lb) aircraft at speeds of approximately 110 km/h (70 mph) over a distance of just 20 m (65 ft). The aircraft were painted bright red to enhance visibility during emergency situations. Launches typically occurred around 1,200 km (750 mi) from destination ports, allowing mail delivery about a day ahead of the ship’s arrival. Westbound flights targeted New York, while eastbound journeys included stops at Southampton before proceeding to Bremen. Operations were limited to the months from April through summer due to weather-related limitations.
Following their retirement from Luft Hansa, two Ju 46 aircraft continued service with the Brazilian carrier Syndicato Condor.
Operators
- Luft Hansa, in partnership with shipping company Norddeutscher Lloyd