The air cushion craft "Pegas" is equipped with a chamber system of flexible protection with the skirt, flexible bags-airlines on boards, elastic nozzles and water gripping sponsons located in the bottom. The curtain-bag in the aft of the hull keeps the air cushion. For making the side flexible skirt more stable; increasing shock resistance, floatability, bags are equipped with inflatable skeg-ballons. Pressure in skegs must be 0,003-0,004 MPa. Both the number of airlines in the hull and elastic nozzles in the flexible skirt form a system of the air cushion filling-up.
The main material for the flexible skirt is PVC fabric, multiple reinforced with technical nylon. The flexible skirt surface, susceptible to wearing-off by increased mechanical shock loads, is reinforced with flat-sheet polyurethane by glue. Admissible temperatures of the fabric “Arctica” range from +40 up to –40°С. The flexible skirt is fixed to the hard hull with the help of grooves in the lower part, add-on boards in the upper part. Skegs are fixed to the hull in grooves.
Pic.1. Flexible protection section (crosscut)