Tags Posts tagged with "USAF"

USAF

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The Lockheed C-130 Hercules is a military cargo plane, famed for its rugged quad-engine turboprop design and ability to use unpaved runways. Originally designed as a transport for infantry and heavy cargo, the C-130 has gone on to prove itself in a wide range of roles, including aerial assault, search and rescue, weather studies, mid-air refuelling and use as a seaborne patrol aircraft. The aircraft’s principal operators include the US Air Force (USAF), US Marine Corps and Britain’s Royal Air Force, but variants of the Hercules are currently serving in over 60 different countries. The C-130 has been in continuous production since 1954, and currently holds the record for the longest production run of a military plane or helicopter. Over 2,300 have been built, at a cost of $62 million per unit. It also holds the record for the heaviest aircraft to successfully land on an aircraft carrier.

Over 40 different variants of the C-130 have been produced, a testament to the versatility of its airframe. In its regular guise as a heavy lifter and troop transport, the C-130 can take a 45,000 pound (20,000 kg) payload inside its 40 foot cargo hold. In real terms, this could work out to 92 standard passengers, 64 airborne troops, six pallets, three Humvees or two M113 APCs. The aircraft is powered by four Allison T56-A-15 turboprop engines, each producing 4,590 shp of power, and can cruise at 292 knots with a range of 2,050 nautical miles.

The Hercules was conceived in the early 1950s as a replacement for the piston-engined transport planes that were in common use at the time. The USAF made its requirement known to many prominent aircraft manufacturers of the day, and was submitted designs from Boeing, Douglas, Airlifts Inc., Chase and Lockheed. The Air Force were impressed with the prototype C-130 they were shown, especially its custom designed T56 turboprop engines, which produced a fair higher power-to-weight ratio than contemporary piston engines. Lockheed won the contract, and delivered the USAF’s first Hercules planes in 1956. The first non-American force to operate the aircraft was the Royal Australian Air Force, which began running the Hercules in 1958.

  • Maximum speed: 320 knots (366 mph, 592 km/h) at 20,000 ft (6,060 m)
  • Cruise speed: 292 kn (336 mph, 540 km/h)
  • Range: 2,050 nmi (2,360 mi, 3,800 km)
  • Service ceiling: 33,000 ft (10,060 m) empty; 23,000 ft (7,077 m) with 42,000 pounds (19,090 kilograms) payload ()
  • Rate of climb: 1,830 ft/min (9.3 m/s)
  • Takeoff distance: 3,586 ft (1,093 m) at 155,000 lb (70,300 kg) max gross weight; 1,400 ft (427 m) at 80,000 lb (36,300 kg) gross weight

 

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The Lockheed Martin / Boeing F-22 Raptor is a fifth-generation fighter jet, currently in service with the United States Air Force (USAF). It is notable for being the first fifth-generation fighter to reach active service, as well as the USAF’s first supermaneuverable production aircraft. Concieved as an aerial superiority fighter, the F-22 incorporates stealth technology to increase battlefield survivability, and can also take on electronic warfare and surface strike roles if required. It was principally built by Lockheed Martin, with Boeing acting as a secondary contractor to provide part of the plane’s airframe and on board systems. Production ended in 2011 to make way for the forthcoming F-35 Lightning II.

The F-22 is powered by twin Pratt and Whitney F119 turbofan engines, each generating 23,500 pounds of thrust. This figure increases to over 35,000 pounds with afterburner engaged, and gives the Raptor a supercruise speed of Mach 1.82. The aircraft has a range of over 1,600 nautical miles, which can be extended to 1,840 with the addition of external fuel tanks. It is armed with a 20mm M61A2 Vulcan gatling cannon, and has four hardpoints under its wings. Most of the F-22’s armament is stored inside the fuselage of the aircraft in an effort to improve its stealth characteristics. It can be fitted with either air-to-air missiles, including the AIM-9 Sidewinder and AIM-120 AMRAAM, or small bombs such as the JDAM or GBU-39. The hardpoints can be used to increase weapons loadout or to carry 600 gallon external drop tanks.

The Raptor is currently only operated by the USAF, due in no small part to US Congress placing a ban on all F-22 exports. The Japanese government has expressed an interest in using the aircraft in its Replacement-Fighter program, but as of 2013 no move has been forthcoming. Congress, the Pentagon and the State Department would all need to ratify the sale if it were to go ahead.

195 Raptors were produced between 1996 and 2011, including eight test aircraft. With a cost per unit of $150 million, the total F-22 program is estimated to have cost around $66.7 billion. The aircraft’s cost was a major factor in the decision to end the Raptor program, as the replacement F-35 is a considerably cheaper option.

  • Maximum speed:
    • At altitude: Mach 2.25 (1,500 mph, 2,410 km/h) [estimated]
    • Supercruise: Mach 1.82 (1,220 mph, 1,963 km/h)
  • Range: >1,600 nmi (1,840 mi, 2,960 km) with 2 external fuel tanks
  • Combat radius: 410 nmi (with 100 nmi in supercruise) (471 mi, 759 km)
  • Ferry range: 2,000 mi (1,738 nmi, 3,219 km)
  • Service ceiling: 65,000 ft (currently restricted to 44,000 ft, sans vests) (19,812 m)
  • Rate of climb: 40,000+ ft/min (200 m/s)
  • Wing loading: 77 lb/ft² (375 kg/m²)
  • Thrust/weight: 1.05 (1.26 with loaded weight & 50% fuel)
  • Maximum design g-load: -3.0/+9.0 g