The Chinese corporation COMAC conducted the first flight tests of the model of a passenger liner equipped with an anterior horizontal tail and an elongated wing with braces. As Avipeo writes , during the flight of a remotely controlled model, the developers tested it with different angles of attack and maneuvering. All the tests were recognized successful. Currently, specialists are engaged in analyzing the data obtained during flight tests.
One way to improve the flight characteristics of aircraft and reduce fuel consumption in flight is to reduce the overall weight of the device. When developing a new aircraft, Chinese specialists intend to reduce the overall weight of the aircraft due to the considerable simplification of the wing design. In this case, the wing itself is made longer. In the design of the elongated and lightweight wing, braces are used that support it and increase the stiffness of the structure.
The developers believe that the aircraft of this design will be in flight to spend less fuel compared to comparable in size and passenger capacity of modern airliners. The development of the new aircraft is carried out within the framework of the V1plus project. In the flight tests, a model was used, which was made on a scale of 1 to 10. It is equipped with four electric motors with air-propelled propellers. Two motors are mounted on the right and left half-wings, and two more are mounted on the tail dual-tail empennage.
In March 2016, the models with the extended elongated wing were tested by the developers of NASA and the American aircraft building concern Boeing. The tests were carried out in a transonic wind tunnel, and their main purpose was to evaluate the flow and pressure of air around the wing, especially at the points of its connection with the braces. Air pressure sensors located outside the wind tunnel and connected by thin tubes to pressure receptacles at the leading edge of the wing were used for evaluation.
Brackets for a long time successfully and widely used in the design of aircraft in the first half of the XX century. In the early 1950s, in France, Hurel-Dubois introduced a passenger aircraft HD.31 with a winged elongated wing. The developers made the aircraft with a wing of this design to improve its aerodynamic quality, reduce fuel consumption and increase the comfort of passengers due to some reduction in air traffic.
The aircraft was successfully tested and allowed to fly on local routes. The main operator of HD.31 and its modifications was to become the French airline Air France. Later, Hurel-Dubois presented several versions of the new aircraft designed for anti-submarine warfare, vehicle transportation, reconnaissance and medical transportation of the wounded. In total, 11 aircraft were built under the project – three passenger and eight reconnaissance aircraft. The project was closed in the late 1950s due to lack of funds.The length of HD.31 was 23.6 meters, the wing span 45.3 meters. The aircraft with a mass of 12.3 tons could fly at speeds of up to 280 kilometers per hour at altitudes of up to eight thousand meters. The range of the aircraft was 2.2 thousand kilometers per hour.