Rohrbach Ro V
| Rohrbach Ro V "Rocco" | |
|---|---|
|
|
| Type: | Airliner |
| Design country: | |
| Manufacturer: | |
| First flight: |
May 27, 1927 |
| Commissioning: |
1927 |
| Number of pieces: |
1 |
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The Rohrbach Ro V "Rocco" , also known as the Rohrbach-Rocco , was a seaworthy, twin-engine shoulder - wing flying boat designed by Kurt Tank for the German manufacturer Rohrbach Metallflugzeugbau .
history
The only built flying boat with the serial number 26 was commissioned from Rohrbach Metallflugzeugbau as a secret naval order and planned successor to the Dornier "Wal" (Do J) . The flying boat was completed in 1927 and delivered to Severa GmbH (camouflage name for the seaplane test department ), which trained seaplane pilots on it. The flying boat was registered in the German aircraft register with the identification number D-1261.
From the end of March 1928 at the Seaplane Test site (SES) of the Reich Association of German found aviation industry (RDL) in Warnemünde Seatrial and comparison flights with the Rohrbach-Rocco and a Dornier R2 Ras "Superwal" (D-1115) and a Dornier R 4 Nas "Superwal" (D-1337) instead. The Rocco was damaged at the horizontal stabilizer, but could be repaired quickly. At the end of April 1928, the Do R 2 and the Rocco flew to a press visit on the Berlin Wannsee .
In the period from May 21 to June 16, 1928, the "Severa" carried out a total of 47 flights on the Travemünde - Copenhagen - Gothenburg - Oslo route with a total of 11,595 km.
In February 1929 the Rocco went to Deutsche Luft-Hansa, which undertook test flights with it.
In May 1929 the Rocco was transferred to the Seaplane Test Center (SES) in Travemünde. In January 1932 the license (D-1261) was withdrawn.
construction
The flying boat had a heavily keeled, two-tier, ship-shaped hull made of all-metal with a high cruiser bow for the accommodation of ten passengers, luggage, cargo and a three-man crew and equipment. On the upper side of the fuselage, two semi-cantilevered, semi-trapezoidal wings were attached in a V-position . These were supported approximately in the middle of the wing by two struts against the side of the fuselage. The support struts of the side floats, which were also connected to the wing supports by side struts, were also attached here. The tail unit consisted of a free-standing vertical fin, with the horizontal fins attached to the sides halfway up ( cross tail unit ) and supported on both sides by a strut against the upper edge of the fuselage. Behind the second boat step was a small keel fin with a water rudder. The flying boat was equipped with two Rolls-Royce Condor Mk. IIIa with 478 kW (650 hp) each and wooden four-bladed lag screws, which were arranged next to each other on support frames in streamlined motor gondolas above the wings. On the underside of the wing, there were two coverable tube coolers on both sides of the fuselage, but these were later installed as front coolers in front of the engines. The fuel tanks were in the wing between the support floats and the fuselage. In the fuselage was a soundproof auxiliary engine room with a Bristol gas starter engine for starting the engines. The flying boat had a radio for telephony and telegraphy with a range of 150–600 km. The necessary electrical energy was supplied during the flight by a generator mounted on the fuselage and driven by a wind screw. If the boat was on the water, an auxiliary antenna could be stretched to the wing tips with a crank-out mast. In this case, the generator could be driven by the starter motor via special couplings, with which bilge pumps could also be operated in an emergency.
Technical specifications
| Parameter | Rohrbach Ro V Rocco |
|---|---|
| crew | 3 |
| Passengers | 10 |
| length | 19.30 m |
| span | 26.00 m |
| height | 6.65 m |
| Wing area | 94.0 m² |
| Wing extension | 7.19 |
| Boat width | 1.75 m |
| Draft | 1.10 m (at full load) |
| Empty mass | 5790 kg |
| + Full service | 200 kg |
| + fixed equipment | 460 kg |
| + loose equipment | 400 kg |
| = Setup mass | 6850 kg |
| + Crew (3 men) | 240 kg |
| + Fuel, lubricant | 1610 kg |
| + Payload (10 pax + luggage) | 900 kg |
| = Payload | 2750 kg |
| = Starting mass | 9600 kg |
| Max. Takeoff mass | 10,500 kg (with 900 kg possible overload) |
| Max. Summit height | 3,150 m (10,335 ft) |
| Climbing time to 1000 m | 5.8 min |
| Landing speed | 115 km / h |
| Cruising speed | 168 km / h |
| Top speed | 220 km / h |
| Range | 1300 km (2400 km with full tanks in case of overload) |
| Engines | 2 × Rolls-Royce Condor Mk. IIIa with 478 kW (650 PS) |
Incidents
During the period of use of this type of aircraft, there was only one accident with 2 deaths.
literature
- Rolf Berger (Ed.): 500 aircraft . High tech and mobility from the beginning until today. Planet Medien AG, Zug, ISBN 978-3-86146-382-5 , p. 127 .
- Fred Gütschow: The German flying boats - flying boats, amphibious flying boats and projects from 1909 to the present . Motorbuch Verlag, 1978, ISBN 3-87943-565-0 , pp. 255-259
- Hans-Jürgen Becker: Seaplanes - flying boats, amphibians, float planes (Die deutsche Luftfahrt Volume 21) , Bernard & Graefe Verlag, 1994, ISBN 3-7637-6106-3 , pp. 132-135
Web links
Individual evidence
- ^ Gütschow, p. 255
- ↑ a b c d e Wolfgang Wagner: Kurt Tank - designer and test pilot at Focke-Wulf . In: German aviation . 2nd, revised edition. tape 1 . Bernard & Graefe Verlag, Bonn 1991, ISBN 3-7637-6102-0 , p. 20, 22 .
- ↑ a b c d e Helmut Stützer: The German military aircraft 1919–1934 . Verlag ES Mittler & Sohn, Herford 1984, ISBN 3-89350-693-4 , p. 168, 193 .
- ^ A b c Karl Ries: Research on the German Aircraft Role Part 1 = 1919–1934 . Verlag Dieter Hoffmann, Mainz 1977, ISBN 3-87341-022-2 .
- ↑ Volker Koos: Aviation between the Baltic Sea and Breitling: The sea and land airfield Warnemünde 1914-1945 . 1st edition. transpress, Berlin 1990, ISBN 3-344-00480-8 , pp. 113, 114 .
- ↑ Heinz J. Nowarra: The forbidden aircraft 1921-1935: The camouflaged air force . 1st edition. Motorbuch Verlag, Stuttgart 1980, ISBN 3-87943-709-2 , p. 156, 157 .
- ^ A b "Rohrbach-Rocco" transport flying boat . In: Oskar Ursinus (ed.): Air Sports : Illustrated technical journal and indicators for the entire aviation . No. 7 . Verlag Flugsport, 1927, ZDB -ID 212889-5 , p. 133-139 .
- ↑ a b planes. Rohrbach-Rocco-Verkehrs-HD-Flugboot . In: Scientific Society for Aviation eV (Hrsg.): Journal for flight technology and motorized airship: ZFM . No. 9 . R. Oldenbourg, 1927, ZDB -ID 243597-4 , Luftfahrt-Rundschau. Technical News., P. 216–218 (report according to the manufacturer's information).
- ^ Gütschow, p. 259
- ↑ Accidents with the Rohrbach Ro V , Aviation Safety Network WikiBase , accessed on January 25, 2019
Ro I | Ro II | Ro III | Ro IV Inverness | Ro V Rocco | Ro VI Inflexible | Ro VII seal | Ro VIII Roland | Ro IX Rofix | Ro X Romar | Ro XI Rostra