Eagle Eye - a multi-purpose unmanned GDP, which the American engineers designed by Bell in collaboration with the company Scaled Composites. The experimental sample Eagle Eye with rotary motor gondolas created to find out the main work and the flight characteristics of an experienced engine with its further improvement. In addition, designers have pursued the goal of identifying potential in the operation of the engine with rotating gondolas for future UAV with vertical take-off and landing. , Bell specifically proposed is Scaled Composites to design and manufacture a composite part for 2 skeletons experimental model because of Scaled experts have extensive experience in this field. In addition, the company began construction of the chassis, propulsion and control systems.
For Eagle Eye had to create extremely complex structure arrangement of bearing elements, since it according to the requirements needed to connect the quality of man and the usual flight of the aircraft. Allison C20 engine installed in the middle of the fuselage and connected to the unifying gear of the drive shafts which pass through the center of the wing and attached to the transmission to all the slanted parts of the wing. The inclined part is present and the drive transmission which is used to move the inclined portion with the rotor and the transmission.
During normal flight and soaring wing experiencing quite a variety of structural overload, leading to an additional problem - the interior of the wing was to be wet wing (the fuel tank), but it is directly proportional to contradict the need to ensure dryness of the drive shaft transmission pipelines.
The multilayer composite fuselage consists of 3 separable parts: the tail, the central and the bow. This scheme has helped to implement a convenient transport and storage of the UAV. Installed on the bow of the joints, which provides free access to the equipment. The composition of the central part: the engine, wings, fuel tanks and landing gear. It can be reached through a removable top cover of the fuselage. The tail removable part fastened to the rest of the structure by means of conventional screws. It comprises a plurality of antennas, and drive to help manage slopes unmanned. All major fixtures and parts that were supplied Scaled Composites, and components of the system together with the engine oil radiators, transmissions, aircraft control systems, flaps and rudders control pre-tested prior to installation engineers Bell.
The design was subjected to static loads in the presence of the customer. Additionally conducted training for training. The customer - the US Air Force. The first instance was unsuccessful, and the test was damaged, but the second has exceeded all expectations. He showed all phases of flight and the guy, and the transitions between them.
UAV demonstrated their abilities to good maximum speed (322 km / h), while the range of the device is 257 km. The Air Force is not very happy with the length of the flight, all 5 hours, but the UAV still able to rise to a height of more than 6 km. Total all the positive aspects led to the signing of the contract for the supply of several dozen Eagle Eye UAV into the ranks of the US Air Force.
|Aircraft Length m||5.00|
|The diameter of the rotor, m||2.50|
|engine's type||2 GTE Allison 250-C20B|
|power, kWt||X 2 258|
|Maximum speed km / h||322|
|Flight distance, km||257|
|Flight duration, h||5|
|Practical ceiling, m||6096|
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