At the Moscow Aviation Institute, a device has been created that makes it possible to repair composite aircraft structures directly on site, without dismantling. The development received the working name "Spider" for its shape and ability to hold onto smooth vertical and inclined surfaces. It has no analogues either in Russia or abroad, the university reported.
The device is intended for installing and securely fastening an excess-pressure bag, which presses a composite "patch" against the damaged area. The higher the pressure, the stronger and more durable the joint.
Previously, the maximum pressure in this type of repair was limited to one atmosphere. The "Spider" makes it possible to raise this figure to six atmospheres. As a result, the quality of the work performed improves noticeably and, consequently, the wear resistance of the repaired elements.
The "Spider" is fixed to the surface with suction cups from which air is pumped out; the vacuum ensures secure fastening. Then a bag is inflated under the device, which presses on the repair area like a press.
The development is especially relevant for hard-to-reach places that are difficult or impossible to separate from the airframe without complete disassembly: the lower surface of the wing, the wing-fuselage joints, skin sections near the landing gear and air intakes, as well as the tail assembly. The device is currently undergoing testing, which will continue until the end of 2026.
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