The McDonnell Douglas (now Boeing) F-15 Eagle is an all-weather tactical fighter designed to gain and maintain air superiority in aerial combat. The F-15E Strike Eagle derivative is an all-weather strike fighter that entered service in 1989. There was a clear need for a new fighter that overcame the close-range limitation of the Phantom while retaining long-range air superiority. After rejecting the U.S. Navy VFX program (which led to the F-14 Tomcat) as being unsuited to its needs, the U.S. Air Force issued its own requirements for the Fighter Experimental (F-X), a specification for a relatively lightweight air superiority fighter. Four companies submitted proposals, with the Air Force eliminating General Dynamics and selecting Fairchild Republic, North American Rockwell, and McDonnell Douglas for the definition phase in December 1968. The companies submitted technical proposals by June 1969. The Air Force announced the selection of McDonnell Douglas on 23 December 1969. The winning design resembled the twin-tailed F-14, but with fixed wings. It would not be significantly lighter or smaller than the F-4 that it would replace.
The Eagle's initial versions were designated F-15A for the single-seat configuration and F-15B (originally TF-15A, but this designation was quickly deprecated, as the F-15B is fully combat-capable) for the twin-seat. These versions would be powered by new Pratt & Whitney F100 engines to achieve a combat thrust-to-weight ratio in excess of 1 to 1. A proposed 25 mm Ford-Philco GAU-7 cannon with caseless ammunition was dropped in favor of the standard M61 Vulcan gun due to development problems. The F-15 retained conformal carriage of four Sparrow missiles like the Phantom. The fixed wing was put onto a flat, wide fuselage that also provided an effective lifting surface. Some questioned if the zoom performance of the F-15 with Sparrow missiles was enough to deal with the new threat of the high-flying MiG-25 "Foxbat"; its capability would eventually be demonstrated in combat.
The F-15 has a "look-down/shoot-down" radar that can distinguish low-flying moving targets from ground clutter. The F-15 would use computer technology with new controls and displays to lower pilot workload and require only one pilot to save weight. Unlike the F-14 or F-4, the F-15 has only a single canopy frame with clear vision forward. The USAF introduced the F-15 as "the first dedicated USAF air superiority fighter since the F-86 Sabre.
The single-seat F-15C and two-seat F-15D models entered production in 1978 with the models' first flights in February and June of that year. These new models have Production Eagle Package (PEP 2000) improvements, including 2,000 lb (900 kg) of additional internal fuel, provision for carrying exterior conformal fuel tanks and increased maximum takeoff weight of up to 68,000 lb (30,700 kg).
The F-15 Multistage Improvement Program (MSIP) was initiated in February 1983 with the first production MSIP F-15C produced in 1985. Improvements included an upgraded central computer; a Programmable Armament Control Set, allowing for advanced versions of the AIM-7, AIM-9, and AIM-120A missiles; and an expanded Tactical Electronic Warfare System that provides improvements to the ALR-56C radar warning receiver and ALQ-135 countermeasure set. The final 43 included the enhanced-capability Hughes APG-70 radar, which was carried forward into the F-15E. The earlier MSIP F-15Cs with the APG-63 were later upgraded to the APG-63(V)1, which significantly improves reliability and maintainability while providing performance similar to the APG-70. The improvements were retrofitted to existing F-15s.
The F-15 has an all-metal semi-monocoque fuselage with a large cantilever shoulder-mounted wing. The empennage is all-metal twin fins and rudders with all-moving horizontal tail surfaces outboard of the fins. The F-15 has a spine-mounted air brake and retractable tricycle landing gear. It is powered by two Pratt & Whitney F100 axial-flow turbofan engines with afterburners mounted side-by-side in the fuselage. The cockpit is mounted high in the forward fuselage with a one-piece windscreen and large canopy to increase visibility.
The F-15's maneuverability is derived from low wing loading (weight to wing area ratio) with a high thrust-to-weight ratio enabling the aircraft to turn tightly without losing airspeed. The F-15 can climb to 30,000 feet (10,000 m) in around 60 seconds. The thrust output of the dual engines is greater than the aircraft's weight, thus giving it the ability to accelerate in a vertical climb. The weapons and flight control systems are designed so that one person can safely and effectively perform air-to-air combat. The "A" and "C" models are single-seat variants that make up the bulk of F-15 production. "B" and "D" models add a second seat behind the pilot for training. "E" models use the second seat for a bombardier/navigator.
A multi-mission avionics system includes a head-up display (HUD), advanced radar, inertial guidance system (INS), flight instruments, ultra high frequency (UHF) communications, and Tactical Air Navigation (TACAN) and Instrument Landing System (ILS) receivers. It also has an internally mounted, tactical electronic-warfare system, "identification friend or foe" system, electronic countermeasures suite and a central digital computer.
The heads-up display projects, through a combiner, all essential flight information gathered by the integrated avionics system. This display, visible in any light condition, provides the pilot information necessary to track and destroy an enemy aircraft without having to look down at cockpit instruments.
The F-15's versatile APG-63/70 Pulse-Doppler radar system can look up at high-flying targets and down at low-flying targets without being confused by ground clutter. It can detect and track aircraft and small high-speed targets at distances beyond visual range (the maximum being 120 nautical miles (220 km) away) down to close range, and at altitudes down to treetop level. The radar feeds target information into the central computer for effective weapons delivery. The capability of locking onto targets as far as 50 nautical miles (90 km) with an AIM-120 AMRAAM enables true beyond visual range (BVR) engagement of targets. For close-in dogfights, the radar automatically acquires enemy aircraft, and this information is projected on the head-up display. The F-15's electronic warfare system provides both threat warning and automatic countermeasures against selected threats.
A variety of air-to-air weaponry can be carried by the F-15. An automated weapon system enables the pilot to perform aerial combat safely and effectively, using the head-up display and the avionics and weapons controls located on the engine throttles or control stick. When the pilot changes from one weapon system to another, visual guidance for the required weapon automatically appears on the head-up display.
The Eagle can be armed with combinations of four different air-to-air weapons: AIM-7F/M Sparrow missiles or AIM-120 AMRAAM advanced medium range air-to-air missiles on its lower fuselage corners, AIM-9L/M Sidewinder or AIM-120 missiles on two pylons under the wings, and an internal M61A-1 20 mm Gatling gun in the right wing root.
Low-drag conformal fuel tanks (CFTs) were developed for the F-15C and D models. They can be attached to the sides of the engine air intake trunks under each wing and are designed to the same load factors and airspeed limits as the basic aircraft. However, they degrade performance by increasing drag and cannot be jettisoned in-flight (unlike conventional external tanks). Each conformal fuel tank can hold 750 U.S. gallons (2,840 L) of fuel. These tanks increase range thus reducing the need for in-flight refueling. All external stations for munitions remain available with the tanks in use. Moreover, Sparrow or AMRAAM missiles can be attached to the corners of the conformal fuel tanks. The 57 FIS based at Keflavik NAS, Iceland was the only C-model squadron to utilize CFT's on a regular basis due to its extended operations over the North Atlantic. With the closure of the 57 FIS the F-15E is the only U.S. variant to carry them on a routine basis.
The F-15E Strike Eagle is a two-seat, dual-role, totally integrated fighter for all-weather, air-to-air and deep interdiction missions. The rear cockpit is upgraded to include four multi-purpose CRT displays for aircraft systems and weapons management. The digital, triple-redundant Lear Siegler flight control system permits coupled automatic terrain following, enhanced by a ring-laser gyro inertial navigation system. For low-altitude, high-speed penetration and precision attack on tactical targets at night or in adverse weather, the F-15E carries a high-resolution APG-70 radar and LANTIRN pods to provide thermal imagery.
The APG-63(V)2 Active Electronically Scanned Array (AESA) radar has been retrofitted to 18 U.S. Air Force F-15C aircraft.[20] This upgrade includes most of the new hardware from the APG-63(V)1, but adds an AESA to provide increased pilot situational awareness. The AESA radar has an exceptionally agile beam, providing nearly instantaneous track updates and enhanced multi-target tracking capability. The APG-63(V)2 is compatible with current F-15C weapon loads and enables pilots to take full advantage of AIM-120 AMRAAM capabilities, simultaneously guiding multiple missiles to several targets widely spaced in azimuth, elevation, or range.
VARIANTS
Basic Models
F-15A
Single-seat all-weather air-superiority fighter version, 384 built 1972-79
F-15B
Two-seat training version, formerly designated TF-15A, 61 built 1972-79
F-15C
Improved single-seat all-weather air-superiority fighter version, 483 built 1979-85
F-15D
Two-seat training version, 92 built 1979-85
F-15J
Single-seat all-weather air-superiority fighter version for the Japan Air Self-Defense Force 139 built under license in Japan by Mitsubishi 1981-97, 2 built in St. Louis
F-15DJ
Two-seat training version for the Japan Air Self-Defence Force. 25 Built under license in Japan by Mitsubishi 1981-97, 12 built in St. Louis
F-15N Sea Eagle
The F-15N was a carrier-capable variant proposed in the early 1970s to the U.S. Navy as an alternative to the heavier and, at the time, considered as "riskier" technology program: F-14 Tomcat. The F-15N-PHX was another proposed naval version capable of carrying the AIM-54 Phoenix missile. These featured folding wingtips, reinforced landing gear and a stronger tail hook for shipboard operation
F-15E Strike Eagle and Related Types
F-15E
Two-seat all-weather long-range strike and ground-attack aircraft for the U.S. Air Force, 237 built 1985-2001
F-15F
Proposed single seat model of the F-15E
F-15H
Export model of the F-15E Strike Eagle for Hellenic Air Force (cancelled)
F-15I RA'AM (Thunder)
Advanced version of the F-15E Strike Eagle for the Israeli Air Force, 25 built 1996-98
F-15K Slam Eagle
Advanced version of the F-15E Strike Eagle for the Republic of Korea Air Force, 40 built 2005-08
F-15S
Export version of the F-15E Strike Eagle for the Royal Saudi Air Force, 72 built 1996-98
F-15SG
Advanced version of the F-15E Strike Eagle for the Republic of Singapore Air Force. Variant was formerly designated F-15T
SPECIFICATIONS
General Characteristics
Crew: 1
Length: 63 ft 9 in (19.43 m)
Wingspan: 42 ft 10 in (13.05 m)
Height: 18 ft 6 in (5.63 m)
Wing area: 608 ft² (56.5 m²)
Airfoil: NACA 64A006.6 root, NACA 64A203 tip
Empty weight: 28,000 lb (12,700 kg)
Loaded weight: 44,500 lb (20,200 kg)
Max takeoff weight: 68,000 lb (30,845 kg)
Powerplant: 2× Pratt & Whitney F100-100,-220 or -229 afterburning turbofans
Dry thrust: 17,450 lbf (77.62 kN) each
Thrust with afterburner: 25,000 lbf for -220; 29,000 lbf for -229 (111.2 kN for -220; 129.0 kN for -229) each
Performance
Maximum speed:
-High altitude: Mach 2.5+ (1,650 mph, 2,660 km/h)
-Low altitude: Mach 1.2 (900 mph, 1,450 km/h)
Combat radius: 1,061 nmi (1,222 mi, 1,967 km) for interdiction mission
Ferry range: 3,450 mi (3,000 nmi, 5,550 km) with conformal fuel tanks and three external fuel tanks
Service ceiling 65,000 ft (20,000 m)
Rate of climb: >50,000 ft/min (254 m/s)
Wing loading: 73.1 lb/ft² (358 kg/m²)
Thrust/weight: 1.12 (-220), 1.30 (-229)
Armaments
Guns: 1× internally mounted 20 mm (0.787 in) M61A1 gatling gun, 940 rounds
Hardpoints: four wing, four fuselage, two wing stations, centerline station, optional fuselage pylons with a capacity of 16,000 lb (7,300 kg),
Missiles:
AIM-7F Sparrow
AIM-120 AMRAAM
AIM-9 Sidewinders
Avionics
Radar:
Raytheon AN/APG-63 or AN/APG-70 or
Although several F-15C aircraft were produced with APG-70 radar, all have been retrofitted to the AN/APG-63(V)1 configuration
Raytheon AN/APG-63(V)1 or
Raytheon AN/APG-63(V)2 Active Electronically Scanned Array (AESA) or
Raytheon AN/APG-63(V)3 Active Electronically Scanned Array (AESA)
Both active AF and ANG F-15Cs will receive another (up to) 48 V3 units between 2009-2015, over the existing 19 aircraft
Countermeasures
AN/APX-76 or AN/APX-119 Identify Friend/Foe (IFF) interrogator
Magnavox AN/ALQ-128 Electronic Warfare Warning Set (EWWS) -part of Tactical Electronic Warfare Systems (TEWS)
Loral AN/ALR-56 Radar Warning Receiver (RWR)-part of Tactical Electronic Warfare Systems (TEWS)
Northrop ALQ-135 Internal Countermeasures System (ICS) - part of Tactical Electronic Warfare Systems (TEWS)
AN/ALE-45 chaff/flare dispensers
Other Equipments Installed
Joint Helmet Mounted Cueing System
MXU-648 Cargo/Travel Pod - to carry personal belongings, and small pieces of maintenance equipme
 Ronin_of_Mibu · Wed Sep 10, 2008 @ 01:37pm · 0 Comments |
