Author Topic: Republic AP-54, AP-55 fighters  (Read 4499 times)

Offline PaulMM (Overscan)

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Republic AP-54, AP-55 fighters
« on: August 26, 2006, 03:16:36 pm »
Republic AP-54, AP-55, from Aviation Week 5th December 1958, via Tony Buttler.
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Offline elmayerle

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Re: Republic AP-54, AP-55 fighters
« Reply #1 on: August 26, 2006, 04:03:13 pm »
AP-54 is clearly derived from the radar-nosed version of the XP-91.  Interestingly enough, the last time I saw the remaining one at the USAF Museum, it had the radar nose and the V-tail.

Offline pometablava

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Re: Republic AP-54, AP-55 fighters
« Reply #2 on: August 26, 2006, 04:18:04 pm »
Wow!!!...Today it's Republic's Day at Secretprojects :: :o

I have been looking for this models for a long time...but now I'm troubled. According to my sources AP-55 was suposed to be Republic's submission against Lockheed Starfighter and Northrop Fang. Am I wrong if I say that AP-55 in the photo doesn't looks very much as a Mach 2 fighter ???

Offline PaulMM (Overscan)

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Re: Republic AP-54, AP-55 fighters
« Reply #3 on: August 26, 2006, 04:27:26 pm »
Its wings are highly swept, reminiscent of the F-105, which was Mach 2 capable, so I wouldn't discount the possibility.
"I'm always right except when persuaded otherwise against my better judgement"
                                                             
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Offline elmayerle

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Re: Republic AP-54, AP-55 fighters
« Reply #4 on: August 26, 2006, 06:47:38 pm »
AP-55 's inlets look very similar to the F-105A's inlets.  I seem to remember that was a Mach 2 aircraft, so this that wouldn't be out of range for this one.

Offline Tophe

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Re: Republic AP-54, AP-55 fighters
« Reply #5 on: August 27, 2006, 12:36:00 am »
Thanks for this post of the twin-boom AP-55 that I did not know... :)
Supersonic twin-boomers have not "existed" but many projects have been designed: a DH-110 derivative, a twin-fuselage in Tony Buttler's English Fighters book, the P.1216 candidate to what became the Typhoon II...

Offline pometablava

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Re: Republic AP-54, AP-55 fighters
« Reply #6 on: August 27, 2006, 02:09:20 am »
Dear Friends, thanks a lot for the comments.
I'm not an engineer so it was not clear for me that this could be the tipycal shape for a Mach 2 interceptor: rounded nose and no area ruled fuselage...but Northrop's Fang had a similar nose and was a Mach 2 performer.

Please let me show a little comment:
Quote
I seem to remember that (F-105) was a Mach 2 aircraft

I thought the same of you, Evan and Paul, but according to "The American Fighter" by Angelucci & Bowers the Thud's max speed at 33,000 ft was 857 mph (1,379 Km/h) which it's below 1.5 Mach.


And the last question: what are this "things" in the wing tips of AP-54?. Too slim to be a fuel tank....



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Re: Republic AP-54, AP-55 fighters
« Reply #7 on: August 27, 2006, 11:32:27 pm »
And the last question: what are this "things" in the wing tips of AP-54?. Too slim to be a fuel tank....



[/quote]

Anti flutter masses?

Offline PaulMM (Overscan)

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Re: Republic AP-54, AP-55 fighters
« Reply #8 on: August 28, 2006, 12:37:56 am »
Pometablava: thats definitely incorrect. An F-105B flew at Mach 2.15 during testing, according to "The Thunder Factory".
"I'm always right except when persuaded otherwise against my better judgement"
                                                             
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Offline Skybolt

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Re: Republic AP-54, AP-55 fighters
« Reply #9 on: August 28, 2006, 02:31:01 am »
Quote
I thought the same of you, Evan and Paul, but according to "The American Fighter" by Angelucci & Bowers the Thud's max speed at 33,000 ft was 857 mph (1,379 Km/h) which it's below 1.5 Mach.

Probably with external loads/tanks? ???

Offline raravia

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Re: Republic AP-54, AP-55 fighters
« Reply #10 on: August 28, 2006, 07:40:56 am »


Wow!...Im spechless

Raravia

Offline pometablava

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Re: Republic AP-54, AP-55 fighters
« Reply #11 on: August 28, 2006, 09:12:46 am »
Quote
Pometablava: thats definitely incorrect. An F-105B flew at Mach 2.15 during testing, according to "The Thunder Factory".

Thanks a lot for the info, Paul  :D, and very bad for Angeluzzi/Bowers book because it is a very big mistake >:(


Offline elmayerle

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Re: Republic AP-54, AP-55 fighters
« Reply #12 on: August 28, 2006, 11:17:45 pm »
Quote
I thought the same of you, Evan and Paul, but according to "The American Fighter" by Angelucci & Bowers the Thud's max speed at 33,000 ft was 857 mph (1,379 Km/h) which it's below 1.5 Mach.

Probably with external loads/tanks? ???

I'd hazard a guess that it's with maximum external loads/tanks, but in regard to weight and to drag.  From what I've read, the F-105 was one of only two aircraft capable of supersonic performance "on the deck", the other was the A/RA-5.

Online Steve Pace

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Re: Republic AP-54, AP-55 fighters
« Reply #13 on: October 25, 2009, 06:11:20 pm »
The "things" on the wings of AP-54 were to be attachment points for a canceled parasite fighter program.

Offline Skyblazer

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Re: Republic AP-54, AP-55 fighters
« Reply #14 on: October 26, 2009, 02:11:35 am »
A small pic, but it is worth adding here for the sake of completion.