Описание
Страна: Германия
Год: 1914
J.Herris Friedrichshafen Aircraft of WWI (A Centennial Perspective on Great War Airplanes 21)
Friedrichshafen FF11
The FF10 was another unbuilt design, and next Friedrichshafen aircraft to appear was the FF11, the first Friedrichshafen flying boat. Like the FF9 it was powered by a 135 hp NAG six-cylinder engine, but this was mounted in the hull and drove a pusher propeller via a long drive shaft, enabling the propeller to be raised above the spray thrown up by the hull during take-off and landing. The Oertz yacht works built the hull for the FF11 at Reiherstieg in Hamburg; subsequent Oertz designs benefited from this connection as can be seen by looking at the Oertz flying boat designs.
First flight of the FF11 was in February 1914 and it was tested until the end of May on the Bodensee, then shipped to the SVK on 4 June 1914, receiving Marine Number 41. Like most other pre-war Friedrichshafen aircraft, only one FF11 was built.
Friedrichshafen FF11 Specifications
Engine: 135 hp NAG
Wing: Area 53.0 m2
General: Length 11.15 m
Height 3.35 m
Empty Weight 1,180 kg
Loaded Weight 1,500 kg
Maximum Speed: 90 km/h
Climb: 500 m 15 min
Friedrichshafen FF21
The FF21 was an improved version of the Friedrichshafen FF11 developed by Jaray especially for the 1914 Baltic Seaplane Competition. The 150 hp Benz Bz.III engine was built into the flying boat hull and drove the propeller via an extension shaft and bevel gear to keep the four-blade propeller up out of the spray of the hull during landing and take-off.
The flying boat hull was built by the Oertz yacht works, which had also built the FF11 hull, and was clearly related to a motorboat. Again, like most prewar Friedrichshafen aircraft, only a single FF21 was built.
Friedrichshafen FF21 Specifications
Engine: 150 hp Benz Bz.III
Wing: Span Upper 16.90 m
Span Lower 13.70 m
General: Length 11.50 m
Height 2.90 m
Описание:
- J.Herris Friedrichshafen Aircraft of WWI (A Centennial Perspective on Great War Airplanes 21)
- Журнал Flight
Фотографии
-
M.Dusing - German Aviation Industry in WWI. Volume 2 /Centennial Perspective/ (85)
Fdh FF11 (1913/14). In February 1913, the Reichs-Marineamt suggested the construction of a two-seater flying boat. The hull was supplied by the Oertz shipyard. The aircraft was completed in February 1914 and was tested on Lake Constance until May 1914. It was transferred to Kiel shortly afterwards, where further flight tests were carried out. The flight performance of the FF11 exceeded that of the flying boats previously tested in Kiel. Only one was built.
The FF11 was Friedrichshafen's first flying boat. The hull was built by the Oertz yacht works and the similarity to Oertz flying boats is obvious. The similarly-powered FF9 had notably better performance than the FF11 due to the flying boat's greater size and weight. The SVK assigned Marine Number 41 to the FF11. -
-
J.Herris - Friedrichshafen Aircraft of WWI /Centennial Perspective/ (21)
The FF21 was developed from the Friedrichshafen FF11 and looks virtually identical in side view to the Oertz F.B.1, leading one to wonder if they were indeed the same design. Oertz built the hulls for both the FF11 and FF21, and there is a great resemblance between these designs.
-
M.Dusing - German Aviation Industry in WWI. Volume 2 /Centennial Perspective/ (85)
Fdh FF21 (1914). Developed from the FF11 for the Warnemunde seaplane competition in 1914. The hull had a length of 6.5 m and was 2.6 m wide. The design was by engineer Kemmerich. The 150 hp Benz engine was housed deep inside the boat and drove the 4-bladed tractor propeller via a bevel gear. The first flight took place in July 1914. Series production did not take place.
-
