European consortium Airbus Helicopters filed in European patent office application for patent for the invention of the electric system for emergency landing of single-engine helicopters. As writes Flightglobal, the patent describes already developed by the system, the first test which was originally planned for 2020, but then was postponed to 2021. The first version of the system is developed for a single-engine light multipurpose helicopter H130.
In the event of a problem with the engine single-engine helicopters have practically no room for manoeuvre and are forced to make an emergency landing. If the engine failed completely, planting is carried out in autorotation. In this case, the rotor spins when reduced exclusively to the incident flow of air. Landing in autorotation is not possible if the engine failure at low altitude — main rotor just will not manage to be untwisted to the required for the controlled reduction of speed.
Patent application of the consortium Airbus Helicopters describes a system comprising a backup battery pack, electric motor, connected to transmission and a set of sensors that must identify a sharp drop in revs turboshaft engine and loss of height. Battery charge is enough for a two-minute work emergency landing. She’ll manage to warn pilots about the problem with the engine and begin to operate in the mode of support autorotation.
The developers also stated that the electric alarm system can support the rotation of the main rotor of the helicopter to re-launch turboshaft engine, if it is possible. Other details about the alarm system were not disclosed.
In 2017, the French company Safran has started to develop a hybrid helicopter, in which the extra power on the shaft of the rotor will be transmitted from the electric motor. It is assumed that hybrid powertrain will reduce fuel consumption the new helicopter by 10-15 percent compared to conventional aircraft in its class.