Republic VTOL/VSTOL/STOL projects

Antonio

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fighter from Republic
scan courtesy of Lark
AP-100
Republic's entry to USAF competion for an all weather nuclear supersonic strike fighter
Powerplant: 6 improved GE J-85 plus 3 lift-fan systems
Gros Weight: 38000 pounds
AP-100A single seater
AP-100B two seater
 

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The AP-100A from the same source as AP-100B, this is Air Progress Spring 1961.

Any idea about the RFP this design was submited?. It is contemporary to TFX (SOR-183) but it is not Republic's TFX because I have drawings from this design and it has nothing in common.
 

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Hi,

may be it was Republic AP-106 VTOL aircraft,it is only my opinion.

Flying convertible - This is scale model of vertical-rising convertible transport that Republic Aviation engineers (of Farmington, N.Y.) claim is capable of carrying up to 20 tons of cargo or 50 passengers in its 29-foot cargo pod. The "Flying Crane" achieves its VTOL (vertical take-off and landing) capability by a 90-degree rotation of the nozzles of its two main (vectored thrust) engines. This power is augmented by lift engines in each wing tip. The transport can travel 500 miles and has a speed of approximately 400 mph (Source: Republic Aviation Corporation press kit, 25eme Salon International de l'Aeronautique et de l'Espace, 1963).
 

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It looks like the engines have separate "cold" and "hot" nozzles a la Harrier. I'd be curious to know how pitch control is achieved though, as there is nothing along the longitudinal axis to provide effective pitch moment generation. Engine out during hover would also be quite exciting! :)

Very cool concept nonetheless. I am not sure what the relationship to the F-105 is, though. Maybe we should discuss this separately.
 
I've separated the AP-106 to its own topic.

With regards to pitch control: To my opinion it would be effected in the same
way as in the Harrier, via puffer jets. One of the advantages claimed for vectored
thrust engines à la Pegasus is the natural stability due to its "four post thrust", so
small puffer jets fed by bleed air probably would be sufficient.
 
How do you come to the AP-106 designation Hesham ?
 
Hesham, you can't simply say "it's just my opinion" when you flaunt a designation like AP-106. A researcher needs to back up his assumptions with circumstanciated evidence, and I can see none here. What makes you think that's the designation?
 
Thanks XB-70 Guy..at last a trail. Can you give the source please ?
Thanks in advance..
 
As the topiv is just "Republic VSTOL transport aircraft", I think, I can add another find from last
Fridays raid to the States Library. Obviously a fan-in-wing design, although no other information
is given, than the name of the design company.
(from Les Ailes february 1961)
 

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Dear Boys and Girls, here is a small article article in French showing a Republic VTOL fan-in-wing transport aircraft project". The article states that Republic intended to concentrate on using the Bristol-Siddleley BS53 vectored-thrust turbofan (Pegasus) in future VTOL designs......

The article comes from the 10th March 1961 issue of Les Ailes......

Terry (Caravellarella)
 

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Some Republic VSTOL projects:
  • XF-84F/V
  • deflected-thrust V/STOL
  • 1956 fighter patent
  • fan-in-wing transport
  • 1963 flying convertible
 

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Republic-Fokker D-24 (D-XXIV) Alliance:
 

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Republic AP-100:
 

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hesham said:
Hi,

may be it was Republic AP-106 VTOL aircraft,it is only my opinion.

http://members.chello.nl/m.waterloo/f-105.html
Flying convertible - This is scale model of vertical-rising convertible transport that Republic Aviation engineers (of Farmington, N.Y.) claim is capable of carrying up to 20 tons of cargo or 50 passengers in its 29-foot cargo pod. The "Flying Crane" achieves its VTOL (vertical take-off and landing) capability by a 90-degree rotation of the nozzles of its two main (vectored thrust) engines. This power is augmented by lift engines in each wing tip. The transport can travel 500 miles and has a speed of approximately 400 mph (Source: Republic Aviation Corporation press kit, 25eme Salon International de l'Aeronautique et de l'Espace, 1963).

Via my dear Tophe,and from Air et Cosmos Mai 1964,

here is a profile to this Republic twin-boom VTOL cargo and transport airplane Project.
 

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As the topiv is just "Republic VSTOL transport aircraft", I think, I can add another find from last
Fridays raid to the States Library. Obviously a fan-in-wing design, although no other information
is given, than the name of the design company.
(from Les Ailes february 1961)

With the article.
 

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Hi,

during 1950s,Republic designed a delta wing single seat VTOL fighter Project,fitted with unique pop-up lift jets located in the center of each wing and a tail-dragger,very similar to this one,but with some of little differences,its designation is not unknown ?.
 

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Last edited:
From AW 1965,

a VTOL Fighter Project.
 

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From Army 1961.
 

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