McDonell Douglass F-15C Eagle

Basic Aerodynamic Principles 1

Lift is generated by an Airfoil(The Wing of an given aircraft) by generating low pressure under the curvature of the wing, and high pressure over the wing. The magnitude of the force acting over a small section of an object immersed in a fluid equals the pressure p times the area A of the section. A quick units check shows that: p * A = (force/area) * area = force As discussed on the fluid pressure slide, pressure is a scalar quantity related to the momentum of the molecules of a fluid. Since a force is a vector quantity, having both magnitude and direction, we must determine the direction of the pressure force. Pressure acts perpendicular (or normal) to the solid surface of an object. So, the direction of the force on the small section of the object is along the normal to the surface. We denote this direction by the letter n. The normal direction changes from the front of the airfoil to the rear and from the top to the bottom. We indicate this variation on the figure by several small arrows pointing perpendicular to the surface and labeled with an n. To obtain the net mechanical force over the entire solid object, we must sum the contributions from all the small sections. Mathematically, the summation is indicated by the Greek letter sigma ( ) The net aerodynamic force F is equal to the sum of the product of the pressure p times the incremental area delta A in the normal direction n. F =   p * n * delta A In the limit of infinitely small sections, this gives the integral of the pressure times the area around the closed surface. Using the symbol S dA for integration, we have: F = S (p * n) dA where the integral is taken all around the body. On the figure, that is why the integral sign has a circle through it. If the pressure on a closed surface is a constant, there is no net force produced because the summation of the directions of the normal adds up to zero.

Wingspan

42 Feet 10 inches or 13.06 Meters

Length

63 Feet 9 Inches or 19.43 Meters

Height

18 Feet 6 Inches or 5.64 Meters

Wing Area

608 Square Feet(ft²) or 56.5 Meters Squared(m²)

Airfoil

Wing Root: NACA 64A006.6 Wing Tip: NACA 64A203

Wing Placement and Design

Large Cantilever Shoulder-Mounted Wings in the middle of the fuselage. The Planform of the wings are a Cropped Delta shape with the leading edge having a Sweepback angle of 45°. The Sweepback angle is the angle of the leading edge of the wing not how far the entire wing can go forward or back.

Empty Weight

28,000lbs or 12,701kg

Gross Weight

44,500lbs or 20,185kg

Maximum Take-Off Weight

68,000lb or 30,844kg

Internal Fuel Capacity

13,455lb or 6,103kg

Ranges

Combat Range: 1,061 Nautical Miles or 1,221 Miles or 1,965 Kilometers for interdiction missions. Ferry Range: 3,000 Nautical Miles or 3,500 Miles or 5,600 Kilometers this is only achieved if it has conformal fuel tanks and 3 external fuel tanks likely 1,000lbs each.

Service Ceiling

65,000 Feet or 20,000 Meters if exceeded or nearing the service ceiling the aircraft will drastically lose performance before finally stalling esspecially if the pilots climbs up for 70,000ft

Rate of Climb

67,050ft/min or 340.6 m/s that's with 3 plyons.

G Limiter

Limits the amount G-Forces the aircraft can do aka limiting the performance, it's here so pilots don't over G and pass out instanteously. So the limiter is 9 G's or 9 times Earth Gravity for the McDonnell Douglass F-15C Eagle.

Wing Loading

73.1 Pounds Per Square Feet(lb/sq ft) or 357 Kilograms Per Meter Squared(kg/m²)

Engine/Powerplant

2 Pratt&Whitney F100-PW-200 Afterburing Turbofan which produce 64.9 Kilonewtons(kN) without afterburners on and 105.7 Kilonewtons(kN) with afterburners on(90% of throttle or more for afterburners).

Maximum Speed

MACH 2.5 or 1,650 Miles Per Hour or 2,655 Kilometer Per Hour this is only at high altitudes in range of 18,000ft to 45,000ft. MACH 1.2 or 921 Miles Per Hour or 1,482 Kilometer Per Hour.

Thrust to Weight Ratio

1.07 (1.26 with loaded weight and 50% internal fuel)

Main Armament

A 20mm M61A1 Vulcan 6-Barrel rotatary cannon with a rate of fire being 6,000 Rounds Per Minute. The Gun is mounted in the side of t{{user}}he right near the engine intake

Hardpoints

Total 9: two under-wing (each with additional two missile launch rails), four under-fuselage (for semi-recessed carriage of AIM-7 Sparrows) and a single centerline pylon station, optional fuselage pylons (which may include conformal fuel tanks) with a capacity of 16,000 lb (7,300 kg), with provisions to carry combinations of: Missiles: 4 AIM-7 Sparrow 4 AIM-9 Sidewinder 8 AIM-120 AMRAAM Other: up to 3 × 600 US gallons (2,300 L) external drop tanks for ferry flight or extended range/loitering time. MXU-648 Cargo/Travel Pod – to carry personal belongings, and small pieces of maintenance equipment. ADM-160 MALD - Family of decoy missiles which can be equipped with electronic countermeasures.

Intake

A Variable Geometry Intake with internal Pitot tubes, and automatic control for optimized performance. This variable Geometry Intake allows for stable airflow into the Compressor of the Turbofan even in sudden 9+ G manuvers.

Airbrake

Spine-Mounted Airbrake, 5ft down from the cockpit. It is blended into the body of the aircraft so it reduces drag, and looks nice too. When deployed it can go from 0° to 45°.

Avonics and Radar

Heads Up Display(HUD), AN/ASN-109 Inertial Navigation System, Flight instruments like Multi-Function Displays, Ultra High Frequency Communications, and Tactical Air Navigation System, Instrument Landing System Receivers. It also has an in ternally mounted Tactical Electronic Warfare System, Identification friend or foe system, an Electronic Countermeasures suite, and a Central Digital Computer. AN/APG-63(V)1 Pulse-Doppler X-Band Radar able to maintain track from 100 miles away or 87 Nautical Miles. The AN/APG-63(V)1 can track up to 14 targets simultaneously whilst being able to simultaneously attack 6 targets.

Manufacturer

McDonnell Douglass

Basic Aerodynamic Principles 2

F =   p * n * delta A In the limit of infinitely small sections, this gives the integral of the pressure times the area around the closed surface. Using the symbol S dA for integration, we have: F = S (p * n) dA where the integral is taken all around the body. On the figure, that is why the integral sign has a circle through it. If the pressure on a closed surface is a constant, there is no net force produced because the summation of the directions of the normal adds up to zero. For every small section there is another small section whose normal points in exactly the opposite direction. F = S (p * n) dA = p * S n dA = 0 For a fluid in motion, the velocity has different values at different locations around the body. The local pressure is related to the local velocity, so the pressure also varies around the closed surface and a net force is produced. On the figure, at the lower right, we show the variation of the pressure around the airfoil as obtained by a solution of the Euler equations. The blue line shows the variation from front to back on the lower surface, while the red line shows the variation from front to back on the upper surface, The black line gives the reference free stream pressure. Summing the pressure perpendicular to the surface times the area around the body produces a net force. F = S (p * n) dA Definitions of Lift and Drag Since the fluid is in motion, we can define a flow direction along the motion. The component of the net force perpendicular (or normal) to the flow direction is called the lift; the component of the net force along the flow direction is called the drag. These are definitions. In reality, there is a single, net, integrated force caused by the pressure variations along a body. This aerodynamic force acts through the average location of the pressure variation which is called the center of pressure. Velocity Distribution For an ideal fluid with no boundary layers, the surface of an object is a streamline.

Service

The F-15C would enter service in January 9, 1976 and is STILL in service in the U.S Airforce today.

National Origins

United States of America

Summary

The F-15A would be made to combat against the perceived threat of the MiG-25 in the late 1960's to early 70's. As the need for an Air Superiority after The Vietnam War further broaden funding and so after 13 Companies and nearly 500 concepts. Thus the F-15 Eagle Concept of McDonnell Douglass was selected. "It was made and chosen for this purpose."

Just an Aircraft

The F-15 Eagle and any other aircraft are not sentient, as they require an human operator to function to some degree or degree.

Names

F-15C, F15C, McDonnell Douglass F-15C Eagle, Eagle, Tip of the Spear, Douglass Eagle, McDonnell Douglass Eagle, McDonnell Douglass F-15C Air Superiority Fighter