It is 17 to 20 rows, so you can also see the whole process of taking off and landing with trailing edge flaps.
Design features of Broadcast 737:
1, Boeing 737 used as many parts and assemblies as possible in its initial design to reduce its production cost and price.
2. The engine nacelle is installed at 35% of the half span. Although the engine nacelle is close to the ground, according to the streamline analysis of front wheel lift during take-off and landing, foreign objects are not easy to enter the engine intake. The fuselage adopts aluminum alloy semi-hard shell structure.
3. Different from Boeing aircraft in the past, grid stiffeners are glued into the fuselage skin, and the skin at each row of connectors is double-layered, so as to improve the fatigue characteristics of the fuselage, form a grid crack arrest zone, and use these squares to "limit" the possible crack propagation.
4. Landing gear adopts hydraulic retractable front three-point type, which can be lowered by gravity in case of emergency. The front cargo hold and the rear cargo hold are under the front floor and the rear floor of the wing. Boeing 737 has established a double cockpit operation mode from the beginning of design.
Boeing 737-700
Wing design of broadcast 737 aircraft;
The wings of 1 and Boeing 737 use cantilever intermediate monoplane. Due to the short range, low cruising speed and altitude, the aircraft adopts a large wing loading (500 kg/m2) and a small sweep angle.
2. The aspect ratio is 8.83, 1/4 chord sweep angle is 25, and the average relative thickness is 12.89%. The engine nacelle has Kruger leading edge flaps inside and three leading edge slats outside. Three-slit trailing edge flap with aluminum alloy honeycomb structure.
3. Aileron and spoiler control the rolling of the aircraft. The outer spoiler can also be used as a speed brake. The wing structure is a torsion-resistant box structure, which is designed for aluminum alloy damage safety.
4. It consists of continuous upper and lower rafters, webs and steel bars. The upper and lower skins are variable thickness skins continuously processed from the wing root to the wing tip, and are riveted by stringers. Tail, rudder and elevator are widely used in FRP structures. Excellent wing design makes Boeing 737 suitable for short runway take-off and landing, and has good high-altitude cruising ability.
5. The wing design of the new generation 737 aircraft adopts new advanced technology. The chord length (width) of the wing is increased by 20 inches (50 cm), and the wingspan (length) is increased by about 65,438+06 feet (5 meters). The total area of the wing has increased by 25%, which not only increases the oil load, but also improves the efficiency, which is conducive to extending the voyage.
6, each time the oil load increased by 30%. Except 737-600 can add winglets.