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Tail slat question
Ed Rasimus wrote:
On Thu, 12 Feb 2004 21:16:48 -0000, "Jim Doyle" wrote: Hello all, Just a quick question - do any aircraft have slats installed on the leading edge of the horizontal tailplane? Rather like slats would be used on the main wing section but - instead of providing helpful lift - they're just to counter a very large pitching moment on approach when wing-mounted high lift devices are deployed. Can't comment on slats, which implys to me moveable. But, the F-4E at slots on the horizontal tailplane--fixed sections about two inches extended from the leading edge of the tailplane sections and running the entire length. The slotted slab was one of the mods necessary to compensate for the longer nose and forward weight addition of the gun. A #7 fuel cell was added in the tail cone to increase extreme aft weight and the fixed slots were added to the tail plane to provide increased aerodynamic downforce to counter the nose gun. Ed, I tend to doubt the extra forward weight was responsible for the fixed inverted slot (not slat) on the tail, as the navy's F-4J, with the short nose and No.7 tank, also had it from the beginning, indeed before the F-4E entered service. The F-4J also removed the inboard section of the LEFs and had drooped ailerons, so that may have had something to do with it, but I'm cross-posting this to r.a.m.n. to see if anyone over there knows why. Guy |
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Guy- The slotted slab was one of the mods necessary to compensate for the
longer nose and forward weight addition of the gun. A #7 fuel cell was added in the tail cone to increase extreme aft weight and the fixed slots were added to the tail plane to provide increased aerodynamic downforce to counter the nose gun. BRBR F-4J/S also had a slotted stab and tank 7-no gun tho..Hawg-10 was heavier than the APQ-72 tho. Inboard leading edge flaps were a maintenance nightmare. I think tank 7, slotted stab, aileron droop, bolted up inboard LE flaps, all were running changes to make the A/C better around the boat, as it got heavier. P. C. Chisholm CDR, USN(ret.) Old Phart Phormer Phantom, Turkey, Viper, Scooter and Combat Buckeye Phlyer |
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Pechs1 wrote:
Guy- The slotted slab was one of the mods necessary to compensate for the longer nose and forward weight addition of the gun. A #7 fuel cell was added in the tail cone to increase extreme aft weight and the fixed slots were added to the tail plane to provide increased aerodynamic downforce to counter the nose gun. BRBR That was Ed, actually. My comments followed his. F-4J/S also had a slotted stab and tank 7-no gun tho..Hawg-10 was heavier than the APQ-72 tho. Inboard leading edge flaps were a maintenance nightmare. I think tank 7, slotted stab, aileron droop, bolted up inboard LE flaps, all were running changes to make the A/C better around the boat, as it got heavier. P. C. Chisholm CDR, USN(ret.) Old Phart Phormer Phantom, Turkey, Viper, Scooter and Combat Buckeye Phlyer Thanks for the info. Guy |
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