Rohrbach Ro XI Rostra

Ro XI Rostra

General information
Type| Flying boat mail plane
National origin| Germany
Manufacturer| Rohrbach
Number built| 1
History
First flight| 30 October 1928

The Rohrbach Ro XI Rostra was a flying boat built in Germany in 1928 for use as a transatlantic mail plane.[1]

## Contents

* 1 Design and development
* 2 Specifications
* 3 See also
* 4 References

## Design and development

The Ro XI shared the same general configuration its predecessor, the Ro V Rocco: a conventional, high-wing flying boat with cruciform empennage and two engines mounted tractor-fashion in nacelles mounted on struts above the wing. The flight deck and cabin were fully enclosed. However, while the Rocco's wings had been braced by struts, the Rostra's wings were a fully cantilever design.[1] The aircraft featured a set of masts and sails that could be deployed for extended travel on water in the event of a forced landing.[2]

By late 1928, Philadelphia journalist Mildred Johnson was organising an east-to-west transatlantic flight aboard the Rostra, initially with three other passengers,[3] but later as the sole passenger.[4] In middle of 1929, the Rostra made a preliminary 1,760 km (1,090 mi) round trip between Travemünde and Stockholm carrying ten passengers, and a longer-range flight to Iceland was planned.[5]

## Specifications

Rohrbach Ro XI Rostra 3-view drawing from L'Aérophile November,1928

Data from Rohrbach Ro XI Rostra - Histaviation [6]

General characteristics

* Crew: 1 or 2
* Capacity: 4 or 5 pax
* Length: 15.60 m (51 ft 2 in)
* Wingspan: 26.90 m (88 ft 3 in)
* Height: 6.30 m (20 ft 8 in)
* Wing area: 77.0 m2 (828 sq ft)
* Empty weight: 4,340 kg (9,550 lb)
* Gross weight: 8,400 kg (18,480 lb)
* Powerplant: 2 × Gnome et Rhône-built Bristol Jupiter VI , 300 kW (400 hp) each

Performance

* Maximum speed: 220 km/h (140 mph, 120 kn)
* Range: 2,370 km (1,480 mi, 1,290 nmi)
* Service ceiling: 3,000 m (9,800 ft)

## See also

Related lists

* List of flying boats and floatplanes

## References

1. ↑ 1.0 1.1 Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 768.
2. ↑ "unknown". Air Progress: 78. October 1971.
3. ↑ "New Atlantic Flight Proposed". Flight: 959. 1 November 1928. http://www.flightglobal.com/pdfarchive/view/1928/1928 - 1037.html. Retrieved 2009-01-31.
4. ↑ "Rohrbach 'Rostra' Under Test". Flight: 1038. 6 December 1928. http://www.flightglobal.com/pdfarchive/view/1928/1928 - 1132.html. Retrieved 2009-01-31.
5. ↑ "Giant Flying Boat Tested". New York Times: pp. 3. 14 August 1929. https://select.nytimes.com/mem/archive/pdf?res=F60915F63554167A93C6A81783D85F4D8285F9. Retrieved 2009-01-31.
6. ↑ "Rohrbach Ro XI 'Rostra'". German Aviation 1919–1945. http://www.histaviation.com/Rohrbach_Ro_XI.html. Retrieved 2009-01-31.

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