November 29 / Boeing F/A-18E/F Super Hornet first flight
Boeing F/A-18E/F Super Hornet
A pair of US Navy F/A-18E/F Super Hornets at Kaivopuisto Air Show 2017
The Boeing F/A-18E and F/A-18F Super Hornet are twin-engine, carrier-capable, multirole fighter aircraft variants based on the McDonnell Douglas F/A-18 Hornet. The F/A-18E single-seat and F/A-18F tandem-seat variants are larger and more advanced derivatives of the F/A-18C and D Hornet.
The Super Hornet has an internal 20 mm M61 rotary cannon and can carry air-to-air missiles and air-to-surface weapons. Additional fuel can be carried in up to five external fuel tanks and the aircraft can be configured as an airborne tanker by adding an external air-to-air refuelling system.
Designed and initially produced by McDonnell Douglas, the Super Hornet first flew in 1995. Low-rate production began in early 1997 with full-rate production starting in September 1997, after the merger of McDonnell Douglas and Boeing the previous month. The Super Hornet entered fleet service with the United States Navy in 1999, replacing the Grumman F-14 Tomcat, which was retired in 2006; the Super Hornet has served alongside the original Hornet. The Royal Australian Air Force (RAAF), which has operated the F/A-18A as its main fighter since 1984, ordered the F/A-18F in 2007 to replace its ageing General Dynamics F-111C fleet. RAAF Super Hornets entered service in December 2010.
US Navy F/A-18E Super Hornet at RIAT 2016
Design
Overview
The Super Hornet is largely a new aircraft at about 20% larger, 7,000 lb (3,200 kg) heavier empty weight, and 15,000 lb (6,800 kg) heavier maximum weight than the original Hornet. The Super Hornet carries 33% more internal fuel, increasing mission range by 41% and endurance by 50% over the "Legacy" Hornet. The empty weight of the Super Hornet is about 11,000 lb (5,000 kg) less than that of the F-14 Tomcat which it replaced, while approaching, but not matching, the F-14's payload and range. As the Super Hornet is significantly heavier than the legacy Hornet, the catapult and arresting systems must be set differently. To aid safe flight operations and prevent confusion in radio calls, the Super Hornet is informally referred to as the "Rhino" to distinguish it from earlier Hornets. (The "Rhino" nickname was previously applied to the McDonnell Douglas F-4 Phantom II, which was retired from the fleet in 1987.)
The Super Hornet, unlike the previous Hornet, is designed to be equipped with an aerial refuelling system (ARS) or "buddy store" for the refuelling of other aircraft, filling the tactical airborne tanker role the Navy had lost with the retirement of the KA-6D and Lockheed S-3B Viking tankers. The ARS includes an external 330 US gal (1,200 L) tank with hose reel on the centerline, along with four external 480 US gal (1,800 L) tanks and internal tanks, for a total of 29,000 lb (13,000 kg) of fuel on the aircraft. On typical missions, a fifth of the air wing is dedicated to the tanker role, which consumes aircraft fatigue life expectancy faster than other missions.
The F/A-18E/F variants are larger and more advanced derivatives of the F/A-18C/D Classic Hornet
Airframe changes
The forward fuselage is unchanged, but the remainder of the aircraft shares little with earlier F/A-18C/D models. The fuselage was stretched by 34 in (86 cm) to make room for fuel and future avionics upgrades and increased the wing area by 25%. However, the Super Hornet has 42% fewer structural parts than the original Hornet design. The General Electric F414 engine, developed from the Hornet's F404, has 35% additional thrust over most of the aircraft's flight envelope. The Super Hornet can return to an aircraft carrier with a larger load of unspent fuel and munitions than the original Hornet; this ability is known as "bringback", which for the Super Hornet is in excess of 9,000 lb (4,100 kg).
Other differences include intake ramps for the engines and two extra wing hard points for payload (for a total of 11), retaining previous hard points on the bottom centerline, wingtips, and two conformal fuselage positions. Among the most significant aerodynamic changes are the enlarged leading edge extensions (LEX) that provide improved vortex lifting characteristics in high-angle-of-attack manoeuvres, and reduce the static stability margin to enhance pitching characteristics. This modification results in pitch rates in excess of 40 degrees per second, and high resistance to departure from controlled flight.
Over 600 Super Hornets has been built
Avionics
Initially, the Super Hornet's avionics and software had a 90% commonality with that of the F/A-18C/D fleet at the time. Differences include an up-front touchscreen control display; a large multipurpose colour liquid-crystal display; and a fuel display. The Super Hornet has a quadruplex digital fly-by-wire system, as well as a digital flight-control system that detects and corrects for battle damage. Initial production models used the APG-73 radar, later replaced by the AN/APG-79 active electronically scanned array (AESA). The AN/ASQ-228 ATFLIR (Advanced Targeting Forward Looking InfraRed), is the main electro-optical sensor and laser designator pod for the Super Hornet. The communications equipment consists of an AN/ARC-210 VHF/UHF radio and a MIDS-JTRS low-volume terminal for HAVE QUICK, SINCGARS and Link 16 connectivity.
The defensive countermeasures of Block I aircraft include the AN/ALR-67(V)3 radar warning receiver, the AN/ALE-47 countermeasures dispenser, the AN/ALE-50 towed decoy and the AN/ALQ-165 Airborne Self-Protect Jammer (ASPJ). Block II aircraft replace the ALQ-165 with the AN/ALQ-214 Integrated Defensive Countermeasures (IDECM) system, consisting of internally mounted threat receivers and optional self-protection jammers. Interior and exterior lighting on the Block II was changed to allow the use of night vision devices. The older ALE-50 decoys are being replaced by ALE-55 towed decoys, which can transmit jamming signals based on data received from the IDECM. The improved AN/ALQ-214 jammer was added on Block II aircraft.
Block II aircraft were fitted with the AN/APG-79 AESA radar, capable of executing simultaneous air-to-air and air-to-ground attacks and providing higher quality high-resolution ground mapping at long standoff ranges. The AESA radar can also detect smaller targets, such as inbound missiles and can track air targets beyond the range of the aircraft's air-to-air missiles. VFA-213, the first Super Hornet squadron to fly AESA-equipped Super Hornets, became "safe for flight" (independently fly and maintain the F/A-18F) on 27 October 2006. The first Super Hornet upgraded with the Joint Helmet Mounted Cueing System (JHMCS) was delivered to VFA-213 on 18 May 2007. The JHMCS provides multi-purpose situational awareness, which includes high-off-boresight missile cuing. The Shared Reconnaissance Pod (SHARP) is a high-resolution, digital tactical aerial reconnaissance system that features advanced day/night and all-weather capability. The Multifunctional Information Distribution System low-volume communication terminal is being upgraded with the MIDS-JTRS system, which will allow a tenfold increase in bandwidth as well as compatibility with the Joint Tactical Radio System standards.
The Super Hornet is powered by two General Electric F414-GE-400 turbofans each generating 13,000 lbf (58 kN) of dry thrust and 22,000 lbf (98 kN) with afterburner.
Radar signature reduction measures
Survivability is an important feature of the Super Hornet design. The U.S. Navy took a "balanced approach" to survivability in its design. This means that it does not rely on very low-observable technology, i.e. stealth. Instead, its design incorporates a combination of signature reduction, advanced electronic-warfare capabilities, reduced ballistic vulnerability, use of standoff weapons, and innovative tactics that collectively enhance the safety of the fighter and crew in an affordable manner.
The F/A-18E/F's radar cross-section was reduced greatly from some aspects, mainly the front and rear. The design of the engine inlets reduces the aircraft's frontal radar cross-section. The alignment of the leading edges of the engine inlets is designed to scatter radiation to the sides. Fixed fanlike reflecting structures in the inlet tunnel divert radar energy away from the rotating fan blades.
The Super Hornet also makes considerable use of panel joint serration and edge alignment. Considerable attention has been paid to the removal or filling of unnecessary surface join gaps and resonant cavities. Where the F/A-18A-D used grilles to cover various accessory exhaust and inlet ducts, the F/A-18E/F uses perforated panels that appear opaque to radar waves at the frequencies used. Careful attention has been paid to the alignment of many panel boundaries and edges, to direct reflected waves away from the aircraft in uniformly narrow angles.
While the F/A-18E/F is not a stealth fighter like the F-22, it does have a frontal radar cross-section an order of magnitude smaller than prior generation fighters. Additional changes for reducing RCS can be installed on an as-needed basis.
The Super Hornets are in production since 1995