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Thread to discuss A-7 Corsair II projects
The A-7F, Corasair III, Strikefighter, etc. all included an airframe stretch
and extra fuel in addition to an F100 or F110. The airframe stretch was to
allow the a/c to be supersonic (Mach 1.4 level IIRR), and the extra fuel was
to keep the range/endurance in the same ballpark.
For instance, here's the proposed Corsair III changes, which was designed to
use rebuilt A-7A/A-7B airframes from the Boneyard, although A-7D/Es would be
easier to convert: An F110-GE-100, 16,700 lb. mil and 27,600 lb. A/B; A
constant-section plug of 29.5" to extend the fuselage around the wing root
area; another plug of 7.5" to the aft fuselage to tailor the airframe to the
F110 and its remote accessory gearbox. Rear fuselage canted upwards 5 degrees
to provide ground clearance for the longer tailpipe. A more sharply-pointed
nose cone (see F-8); the original was made blunter to reduce length on
carriers. Internal configuration changed to increase fuel capacity.
The "Strikefighter" was an upgraded A-7D with an F100 vice F110, and was the
design entered in a CAS/BAI contest against the F-16, AV-8B and F-20.
All data above from Dorr's Osprey book "Vought A-7 Corsair II." There are also
various issues of Air International from the '80s which describe the various
proposals in slightly more detail, but I'm too lazy to hunt them up.
Guy
overscan said:Some additional unbuilt projects
A-7D(ER)
1972 project, lengthened fuselage and the GAU-8A 30mm cannon from the A-10. Outgrowth of their AX proposal, but the A-10 won a flyoff against the A-7D in 1972 and ended the project.
Vought A-529D
Twin F404 engined version for the Navy
Source
- Al Adcock A-7 Corsair II in Action Squadron-Signal, 1991
Deino said:Would it be possible to post these two proposals ??
Cheers, Deino
overscan said:Some additional unbuilt projects
A-7D(ER)
1972 project, lengthened fuselage and the GAU-8A 30mm cannon from the A-10. Outgrowth of their AX proposal, but the A-10 won a flyoff against the A-7D in 1972 and ended the project.
Vought A-529D
Twin F404 engined version for the Navy
A-7G
Version offered to Switzerland in 1971. Uprated TF41-A-3 engine, radar/Loran removed (to be replaced by Swiss specified equipment), Vulcan cannon replaced by 2 23mm Madsen cannons. Two built, flown against G-91M and A-4M Skyhawk. Refurbished Hunters were purchased instead.
overscan said:Vought building two seat A-7E derivative (Vought V-519) as advanced trainer; seat advanced attack version, with F100 turbofan and second crew member space given over to 30mm cannon ammo also considered.
Source:
- Air Enthusiast June 1972, p330
pometablava said:I don't know the precise source but it is an italian mag from 1986.
A-7 CAS/BAI (Close Air Support/Battlefield Air Interdiction)
Interim solution for the USAF consisting in reengining the 337 Air National Air Guard A-7 fleet with a new afterburning engine (no more details :- ???), updated avionics and structural modifications.
TinWing said:overscan said:Some additional unbuilt projects
A-7D(ER)
1972 project, lengthened fuselage and the GAU-8A 30mm cannon from the A-10. Outgrowth of their AX proposal, but the A-10 won a flyoff against the A-7D in 1972 and ended the project.
Vought A-529D
Twin F404 engined version for the Navy
Source
- Al Adcock A-7 Corsair II in Action Squadron-Signal, 1991
I'm familiar with many of the AX proposals. Jay Miller's "Skunkworks" has drawings of both J52 and TF34 powered Lockheed proposals.
However, I'm very surprised by this mention of of a GAU-8 armed A-7 derivative.
I'm also left to wonder whether or not the Vought A-529D proposal's F404 engines featured reheat. An A-7 with a pair of "dry" F404s would make an interesting comparison with the cancelled A-6F.
A-7X is being proposed in two versions, one with a pair of unreheated F404s and the other with a single reheated F101 derivative engine. With a speed capability ranging from M=1.1 at sea level to M=1.6 at attitude, the A-7X/F404 has an estimated HI-LO-LO-HI radius (including 50nm/93km dash) with 4 Mk 83 bombs, a pair of AIM-9 Sidewinders and FLIR of 435nm (806km) on internal fuel and 635nm (1117km) with external fuel, similar estimates for the A-7X/F101 being 500nm (926km) and 745nm (1380km) Both versions have a similar 20,000lb (9072kg) external payload to the A-7E, but internal fuel is increased to 12,674lb (5749kg) for the A-7X/F404 and to 10,899lb (4944kg) for the A-7X/F101, both havin a max gross weight of 46,000lb (20866kg). The A-7X will add self-escort strike, reconnaissance and deck launched intercept potential
At target ranges of less than 400 nautical miles, the reengined option [A-7X] would be about 10 percent less capable than the Navy's preferred option [FA-18]. At longer ranges, however, it would be up to 2.3 times more capable. Compared with the current force [A-7E], it would be about 15 percent more capable at all ranges.
CFE said:In the study, how was it determined that the F/A-18 would have better payload-range than the A-7X for missions shorter than 450 nautical miles? Is this another case of the military acquisition community trying to make an unfair comparison between a hypothetical/unproven system versus a flight-tested system? Or was there enough F/A-18 test data by this point to make a fair assessment?
Either way, the A-7's superior range on long-distance strike missions would have been appreciated in Afghanistan, especially in the early phases of OEF before bases were established in-country. There's much to be said about the ability to pack fuel into a thick, subsonic airfoil.
I will admit, I have often maintained the Navy should have chosen a re-engined A-7 (I was thinking along the lines of the A-7F) with new avionics instead of developing the F/A-18. The info posted seems to reinforce that belief in my mind.
Should have, would have, could have...
Creative said:Wow full cricle, in the end it looks like a Crusader.
Creative said:Wow full cricle, in the end it looks like a Crusader.
CFE said:Aside from the ability to break Mach 1, what advantages did the F100 have over the TF41 in the A-7? Was there an appreciable improvement in specific fuel consumption? And how did the A-7F stack up against potential air-to-air threats in areas of maneuverability like rate of roll and turning radius?
CFE said:One of the Hornet's biggest selling-points comes from the Desert Storm mission where two Hornets successfully engaged two MiG-21's and then proceeded on to their target. Would the A-7F have a realistic chance of pulling off the same mission?
Pyrrhic victory said:CFE said:One of the Hornet's biggest selling-points comes from the Desert Storm mission where two Hornets successfully engaged two MiG-21's and then proceeded on to their target. Would the A-7F have a realistic chance of pulling off the same mission?
Depends on the air-to-air modes of the radar installed, and how well trained said A-7F, A-7X if you're using the naval equivalent, pilots were in the air-to-air regime. I'd hazard a guess (ass-u-me) that the A-7F electronics upgrade would have not have as much air to air capability as the APG-65 or -73 series. If an export MiG-21 without an all aspect heater stumbles infront of your boresight then by all means unleash the Lima or Mike on him. If he gets the drop on you, I would run away to live to fight another day, and complain over the radio how those extra F-14s per carrier the Navy purchased, instead of a redesigned YF-17, let the -21 get through to me!
However, I wouldn't want to be going up against any more of a threat level than the MiG-21/23 baseline, even then its iffy, but this is a blessing in disguise. The F-18's self escort capabilities are nice and dandy when you're beating up 3rd worlders in monkey machines but over hostile territory in Europe encountering a fighter threat (MiG-29, MiG-31, Su-27) is a certain mission kill. Even if you do punch your weapons and fuel, you're up against airframes that you only have parity against clean... maybe. The Big old "A" infront of the designation would also prevent the mission planners from stealing sorties from the big fighters who would have a reasonable chance against said threats. Finally, the aircrew would be able focus and specialize on the dangerous, dirty work of BAI.
r16 said:ı believe one of the Hornet pilots fired a Sidewinder first and assuming that it would miss he also fired a Sparrow . Scott Speicher was also from this squadron and it appears to have become agreed that he was downed air to air probably on the same mission .