I Have a Store In the World of American Comics

Chapter 054 Gold Glitter vs American Eagle

F-15 Fighter, codename/nickname: Eagle, translation: Eagle.

Also known as -15Eagle, translation: McDonnell Douglas F-15 "Eagle", nickname: American Eagle, is the US Air Force's fourth-generation supersonic jet fighter.

Because the F-15 fighter adopts a tandem two-seat swept-wing aerodynamic layout and is equipped with two turbofan engines, it has high maneuverability and combat capability, so the aircraft can be recognized at a glance when encountering it.

The F-15 fighter jet has a complete all-weather combat capability and can use advanced medium-range air-to-air missiles to destroy enemy aircraft, mainly for air superiority combat missions.

After the F-15 fighter gained air supremacy, the F-15 fighter was often assigned air-to-ground combat support missions, so an air-to-ground combat variant was developed in the later stage.

"Is this food edible? Is it delicious?"

Jin Shining also noticed the flashing F-15D on the ual screen, and asked curiously.

Hearing Jin Shao's words, Zhou Wenwen was stunned at first. When he was about to say, "This thing is delicious when more than half of it is made of plastic."

"It's edible, and I guess it's delicious."

If Zhou Wenwen remembers correctly, like many fighter jets, the fuselage of the F-15 fighter jet is an all-metal semi-monocoque structure, and the fuselage consists of front, middle and rear sections.

The front section includes the head radome, the cockpit and the electronic equipment compartment, and the main structural materials are aluminum alloy and clad metal.

The middle section is connected to the wing, and some titanium alloy parts are used to bear large loads, accounting for about 20.4% of the weight of this section. The first three frames are aluminum alloy structures, and the last three are titanium alloy structures.

The rear section is a titanium alloy structure engine compartment, and the flat tail with the zigzag leading edge is a full-motion flat tail, which is large in area and can meet the needs of high-speed flight and maneuvering.

The F-15 wing design adopts a cut-tip delta wing shape, which can improve the wing structure and increase the internal volume of the aircraft. At the same time, it can make the increase of the aircraft's resistance in the transonic region become more gradual, and the focus movement of the aircraft at transonic speed is also larger. small, reducing the trim resistance.

In order to improve the subsonic performance of the aircraft and consider the weight, manufacturing process and system complexity, the F-15 adopts a non-leading edge maneuvering flap and a leading edge fixed conical torsion design, the leading edge is swept back 45 degrees, and the relative thickness of the wing is 6%/3% (root/tip) without the leading edge maneuvering flaps, which were widely used at the time.

The F-15 wing adopts an aspect ratio of up to 3 and a root-to-tip ratio of 5, which is conducive to delaying the separation of the wingtips and significantly reduces the induced drag of the wing.

The larger aspect ratio increases the **** of the lift line of the wing and improves the lift characteristics of the wing.

At the same time, the aspect ratio increases, and the supersonic zero-lift drag coefficient also increases, increasing the trans/supersonic wave resistance.

This shortcoming is made up for by the use of powerful engine thrust and other aspects of design.

The wing area is 56.48 square meters, the dihedral angle is 1°, and the installation angle is 0°. There are only four control surfaces on the wing, the trailing edge high lift **** and the ailerons.

The F-15 wing structure is a multi-beam torsion-resistant box-type damage safety structure, the front beam is aluminum alloy, and the rear three beams are titanium alloy. The lower skin of the inner integral fuel tank is made of titanium alloy panels, and the rest are aluminum alloy machined integral panels.

The front and rear edges of the wing, **** and ailerons are all aluminum honeycomb sandwich structures. The damage safety structure of the wing, combined with the load-bearing skin, can support the aircraft to continue flying as long as one wing spar is still intact, which greatly improves the survivability of the aircraft.

The F-15 vertical stabilizer and tail are both honeycomb panel skins and sandwich structures composed of boron fiber composite materials, titanium alloy torsion boxes, full-thickness aluminum sandwich cores and boron-epoxy composite panels. The torsion box of the two is a titanium alloy structure, and the front and rear edges are an all-aluminum honeycomb structure.

The rudder features carbon fiber-epoxy composite beam ribs and boron-epoxy panels and an aluminum sandwich skin. Both the horizontal tail and the rudder can be interchanged left and right.

The vertical tail is designed with a large aspect ratio and a medium sweep angle. The leading edge sweep angle is 37°, and the camber is 2°. The height is relatively large. Under the high angle of attack, the aircraft's heading stability can be significantly improved, thus ensuring that the F-15 can Effectively perform high angle of attack maneuvers.

The flat tail is designed with a large swept full-motion low flat tail, with a leading edge sweep angle of 50°, with leading edge sawtooth and wing tip beveled design.

The pilot's cockpit uses an integral windshield to provide a good view, and the seat position is also arranged at a high level. Almost 1/3 of the pilot's body is exposed outside the fuselage, so that the pilot has a 360-degree view of the upper hemisphere, and the forward and downward viewing angle reaches 15. °.

There is a protruding fairing on the outside of the air inlet, which extends forward from the leading edge of the root of the wing. Under high angle of attack, a vortex can be generated, delaying the stall of the wing and improving the efficiency of the tail. The larger the radius, the larger the suction, the air flow is not easy to be separated, and the effect is not as good as that of the side strip.

The fairing structure extends backward through the wing to form a tail support truss (tail support) structure. In addition to providing space for tail installation, a certain bowing moment can be generated at high angles of attack to improve the performance of the aircraft at high angles of attack.

The single speedbrake of the F-15 fighter jet is located on the back of the fuselage, with a maximum opening of 35°, which can be opened at any speed without changing the pitch attitude of the aircraft.

The tail of the F-15 adopts a twin-engine, small-pitch layout, which reduces the drag of the aircraft.

The F-15 fighter jet was equipped with two Pratt & Whitney F100-PW-100 turbofan engines in the early days, and after 1991, the F110-GE-129 or F100-PW-229 turbofan engines with a thrust of 129 kN/level were replaced.

The F100-PW-100 engine developed by Pratt Whitney has a single static thrust of 65.2 kN and an afterburner thrust of up to 11,340 kg, which provides a solid foundation for the superior performance of the F-15.

This is an axial-flow turbofan engine with a bypass ratio of 0.7, dual-shaft 3-stage fan + 10-stage high-pressure compressor + 2-stage turbine.

The engine design is quite advanced, with a thrust-to-weight ratio of 7.8, and can be installed interchangeably on the left and right sides. It only takes 20 minutes to disassemble under ideal conditions.

The low-resistance conformal fuel tank~www.wuxiamtl.com~ is specially developed for the C/D type. It is installed on the outside of the air intakes on both sides, below the main wing, and can load about 3200 liters of fuel. This device makes the F- 15 can reduce the time required for aerial refueling, thereby increasing its mission time on the battlefield and assisting its global deployment operations.

The F-15 fighter has six underwing hardpoints, four outboard hardpoints, and one fuselage centerline hardpoint, with a total external hanging point of up to 7,300 kg.

The main weapons of the F-15 are AIM-7 air-to-air missiles, AIM-9 air-to-air missiles and AIM-120 air-to-air missiles, among which AIM-7 and AIM-120 can be mounted on the outside under the air inlet, and the multifunctional pylons under the wings AIM-9 and AIM-120 can be mounted.

It can also mount various aviation bombs of the US Air Force, including free fall nuclear bombs, and 2000 kg GBU-28 bunker penetrating bombs.

The auxiliary weapon is an M61A1 Vulcan cannon mounted on the outside of the right air intake.

The F-15 is equipped with an automated weapon system and a hand-operated throttle and stick (HandsOnThrottleAndStick, HOTAS) design, allowing pilots to use the throttle lever and buttons on the stick to effectively conduct aerial combat.

......

To be continued

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Chapter 055 Forecast Level 2 Maintenance Capability