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MD-900 Module Airship
::
Airship purpose and applications field
The modular airship MD-900, which has a volume of 9,000 cubic meters, is
intended for transportation of specialized removable modules.
One of the possible application areas of the airship can be the delivery of mounted and ready-for-operation special equipment sets intended for urgent rescue, emergency and breakdown works. :: Airship design
The main concepts of the modern airship building are implemented in the
airship design - the possibility of both vertical and short takeoff and
landing, a flight without lifting gas consumption, the propeller thrust
vector control in a vertical plane, the possibility of basing both at an
aerodrome and at the prepared natural sites,  application
of an auxiliary rudder engine, the use of modern materials and onboard
equipment.
The airship MD-900 is made in accordance with a semirigid scheme. The airship design structure includes permanent ground service facilities. The airship envelope is made out of a domestic aerostatic fabric on the lavsan basis with a cover on the dioxide titanium basis. The design rigidity is ensured by a fin truss made out of aircraft alloys. The bow reinforcement of the airship is fitted with a mooring unit. The airship has a saddle attachment fitting for parking in the field conditions on movable mooring masts. The airship has an X-tail with an auxiliary bottom fin servicing for installation of a tail rotor. The power plant consists of two propulsion diesel engines and a rudder engine. The design of the motor installation allows to change the direction of the propulsion engines thrust vector. Installation of the ring fairings of the propellers will allow to reduce the level of noise essentially. The system of water condensation out of exhaust gases for supplement of the onboard ballast is provided in the airship design. The rudder engine serves for the airship control in case of rudder planes misoperation, which allows to control an airship in a hovering mode. The rudder control is hydraulic, it is carried out from the pilot's control column. The control system provides the onboard computer installation for the airship control facilitation and a control system reliability increase. The airship gondola block consists of three structural parts: a pilot cabin, a demountable specialized module and an engine compartment. A pilot cabin of a semi-monocoque design is mounted to a fin girder and it only serves for the crew accommodation. The space for the pilot seats and pilot equipment is provided in the pilot cabin. The the pilot cabin is connected with the motor-compartment through the compartment inside the fin truss. The crew recreation facilities and a special equipment for the operations with replaceable modules are located at the same place.
:: Airship equipment
The airship onboard equipment consists of radio communication equipment,
navigational, flight, and other complexes. Their structure depends on requirements
of assured around-the-clock piloting in complicated weather conditions.
The onboard computer application will allow to facilitate and simplify
piloting, to increase reliability at the expense of a hydraulic control
system duplication, to reduce the fatigue of the pilots by long patrol
flights.
:: Special airship equipment
The special equipment includes modules and the equipment
for modules installation and operation. The standard module has the following
dimensions: 9,1x2,4x2,4 m. The module strengthening to the airship fin
truss is carried out by four locks. The module is mounted between the back
partition of the pilot cabin and the forward partition of the engine compartment.
The gaps between the module, the pilot cabin and the engine compartment
are filled with an inflatable rubber sealant. During strengthening and
module removal the air from the sealant is deaerated. The module can be
docked and detached both from below and from the sides. The airship equipment
allows, if necessary, to install the modules without landing.
Simultaneously the equipment for modules lift and docking can be used for payload transportation on the external suspension and for carrying out air - erection work. The following types of replaceable modules are developed at present: 1. Permanently used modules: A tourist module designed for 12-18 of tourists; A module of radar-tracking patrolling containing a completely equipped radar-tracking station; A module of ecological patrolling, which has a laboratory of ecological environment control; 2. Modules used for emergency and rescue operations: A power module intended for the electric power supply; An operational module, which has two operational boxes; A living module intended for residing of 20 persons; A food compartment, which consists of a kitchen and a room for meals; A sanitary-hygienic block; A staff module, which contains the equipped mobile staff for emergency and rescue operations; An illumination module, which includes a diesel power station, Au-3L aerial lighting systems, a system of the balloon gas filling for the airship envelope; A hermetically sealed module intended for evacuation of 24 persons; An isothermal refrigerator module; A module for the equipment carriage and storage.
:: Airship operation
The airship can be permanently exploited in the passenger
variant, for payload transportation, erection works and research works.
The design modularity permits to essentially simplify, speed up and make
cheaper cargo handling works. The possibility of airship usage for survey
excursions above Moscow or along the Golden Ring of Russia is under consideration.
By this not only the aircraft maintenance costs are covered, but it also
can bring appreciable profit.
In case of a failure or natural disaster the airship immediately returns to the central base, where there is a modules storehouse intended for conduction of emergency and rescue operations and, redocking the specialized replaceable modules, they are delivered to a destination. According to its flight performance the MD-900 airship is accessible for assimilation and piloting by the aeronauts who have had an appropriate training. The onboard equipment complex allows to execute both day and night flights. The operation provides three airship parking variants: inside a dock, on a movable or stationary mooring mast, or in specially equipped natural shelters. During the airship operation on the mooring mast, the filling and ballasting are carried out by its feathering into the wind. The running repair can be carried out by means of airship bracing to the ground fixed anchors or field corkscrews, in the side wind with a velocity of up to 12 m/s. After getting the storm warning the airship is transferred to a base dock or specially equipped places of a storm parking (equipped ravines). The capital repair is made in a base dock. Depending on a loading degree, the airship can make takeoffs and landings both vertically and with a short roll (run). The airship is towed to a starting point by a movable mooring mast on a tractor basis. The airship can be kept by mechanical winches in the side wind gusts. The airship mooring operations are carried out in a wind of up to 15 meters per second. The airship gas filling and auxiliary filling are carried out by means of stationary gasholder at the base parking, either by means of automobile gas refuellers or bottles. At the present time the project of the module airship MD 900 is in the stage of a draft. RosAeroSystems has limited financial resources to develop the project, therefore we invite the companies that are interested in the project to consider financial participation.
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