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Cabin Heating
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Windscreen Heating
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Propeller Heating
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Heating of Probes
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Automatic control of temperature as well as user setting of parameters
For Comfort and Safety
For Comfort and Safety
We have experience with the development and manufacturing of integrated aircraft systems focused on heating.
Aircraft normally fly at altitudes where temperatures fall below the freezing point, that´s why the heating of aircraft parts has an important role for correct function of instruments and thus for flight safety.
Cabin Heating
Cabin Heating
The system of passenger compartment heating and cockpit heating ensures sufficient thermal comfort and ventilation of the aircraft space.
The cabin temperature is regulated by an automatic control unit. The system evaluates the temperature in the cabin and, via the regulation valve, controls the inlet of hot air to the mixers, thus maintaining the selected temperature.
The control unit consists of the segmented display that serves for displaying the measured and set values of temperature in the heating system.
The equipment allows communication with parent system (FMS, EFIS, etc.) through standardised bus bars or via the indication of discrete conditions. The behaviour of the built-in digital regulator, including the limiting temperatures, is fully configurable by the user.
Other equipment in the cabin heating control unit is the control box located directly in the airframe. The crew has controllers for switching the heating on and for setting the required temperature. Further data is indicated by external indicators and provided to the parent systems.
Windscreen Heating
Windscreen Heating
The system of windscreen heating of the aircraft is based on glass heating by means of the heating coils and the automatic temperature regulation dependent on the temperature sensor located in the cockpit glass.
The heating has a preheating function for safe full power de-icing. The control unit is equipped with its own power source, meaning that the heating becomes stable regardless of oscillating voltage from the alternator. The unit includes two independent regulators to enhance the safety of operation.
The indication of operating or failure conditions on the separate indicating cells, or sending this data to the parent system, is a forgone matter.
Heating of Probes
Heating of Probes
The system of probe heating is part of the system for checking the power supplies to the aircraft.
The signals from the current transmitters located in the power supply wires of the aircraft heating systems are led to the control unit inputs.
The signals serving to control the actuators of the aircraft heating system are on the outputs of the control unit. In addition, on the outputs there are warning signals that inform about incorrect behaviour of heating elements.
The control unit, an on-board aircraft instrument on the front panel, is equipped with the set of light-emitting diodes. In instances when the heating system works without failure, only the system activation is indicated and it is not necessary to make any other adjustments. If the consumption of current intended for supplying the heating circuits exceeds the limiting value or doesn’t’t reach the required value, a failure is indicated. The defective circuit is disconnected and the crew is informed about the failure.
Propeller
The icing accumulation on the aircraft propellers directly affects flight safety. An uneven layer of ice on the propeller blades can cause strong engine vibrations and therefore special attention must be paid to the propeller heating system.
The system of heating is based on a cycle timer which ensures the timed-switching of the heating elements of individual propeller blades. The system includes two independent cycle timers supplied from various bus bars of the aircraft. This ensures a high level of safety.
The function of the cycle timer is based on the principle of redistribution of electrical current to individual heating elements. In practice this means that the alternating heating of inner and outer propeller sections is ensured. This is carried out synchronously for both propellers. Depending on ambient conditions, the crew selects the duration of heating and thus the intensity of de-icing.
In the case of a heating cycle timer failure, the back-up cycle timer takes over control and the crew is informed about it via the parent system (EFIS) which obtains the data from the control unit. In the case of a failure of individual heating elements, the heating of the remaining parts is in no way affected.
