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Author Topic: US Pratt & Whitney/Curtiss-Wright SST Engines  (Read 11339 times)

Offline Delta Force

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US Pratt & Whitney/Curtiss-Wright SST Engines
« on: October 12, 2013, 03:09:04 pm »
I've been trying to find information (specifications and possibly images) on the Pratt & Whitney JTF-17A and the Curtiss-Wright design submitted for the US SST program in the 1960s. While there is a wealth of information on the GE4, I haven't been able to find much on these other engine designs searching here or on the wider internet. I haven't even been able to find out the designation for the Curtiss-Wright submission. I'm not even sure if the Curtiss-Wright design was a turbojet/turbofan, I've seen some indications that it may have involved ramjet technologies (perhaps a J58 type hybrid design).

Offline blackkite

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« Last Edit: October 12, 2013, 03:38:47 pm by blackkite »

Offline George Allegrezza

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #2 on: October 12, 2013, 03:37:17 pm »
DTIC has quite a bit of info on the JTF17, mostly the contractor reports.

Suggest this topic be moved to Propulsion.

Offline blackkite

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« Last Edit: October 12, 2013, 10:59:19 pm by blackkite »


Offline blackkite

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #5 on: October 13, 2013, 12:18:02 am »
Mighty TJ-60 engine?
TJ-60 engine → TJ-70 engine?
« Last Edit: October 13, 2013, 12:53:18 am by blackkite »

Offline Delta Force

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #6 on: October 13, 2013, 01:28:43 am »
Thanks for the excellent resources and quick responses. Where do you guys manage to find all of these resources?

Also, why is the JTF-17 diagram marked confidential? Was that a confidential corporate document or was the SST engine program at one point under US national security secrecy regulations? To some extent that would make sense due to the advanced propulsion technologies involved, but America's SST was going to be exported to NAM and even Soviet aligned nations such as Algeria and India. Why would an early document for a publicly funded commercial aircraft propulsion system be under security regulation?

Offline blackkite

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #7 on: October 13, 2013, 04:20:53 am »
Thanks for the excellent resources and quick responses. Where do you guys manage to find all of these resources?

Also, why is the JTF-17 diagram marked confidential? Was that a confidential corporate document or was the SST engine program at one point under US national security secrecy regulations? To some extent that would make sense due to the advanced propulsion technologies involved, but America's SST was going to be exported to NAM and even Soviet aligned nations such as Algeria and India. Why would an early document for a publicly funded commercial aircraft propulsion system be under security regulation?
Hi! I can't answer your questions exactly.
All my resources are this high class SPF member's posts(mainly Shockonlip's and skybolt's post) and internet sites.(Google)
I want to see Curtiss Wright TJ-60 and TJ-70's cross section drawings.
Any way, FAA, Lockheed and Boeing knows everything and still keep every documents now. ;)
« Last Edit: October 13, 2013, 03:02:59 pm by blackkite »

Offline blackkite

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« Last Edit: October 17, 2013, 04:53:02 am by blackkite »

Offline blackkite

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Offline blackkite

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #10 on: October 27, 2013, 02:23:01 am »
In 1962, the company received a Federal Aviation Agency (FAA) contract to  study compressor, turbine, and computer technologies for supersonic transport  jet engines and began competing for a major government contract to develop and  produce a supersonic commercial airliner engine. During the mid-1960s, the  company sold its electronic fittings and components division at a time when it  was plowing about $15 million of its own funds into the development of a  supersonic transport plane engine.
Curtiss-Wright lost its bid to produce the supersonic engine, and, by 1967,  the company had abandoned Berner's goal to build complete aircraft engines,  opting to become a first-tier supplier, or subcontractor, for other companies  involved in aerospace and other fields.

http://www.referenceforbusiness.com/history2/11/Curtiss-Wright-Corporation.html
 
And
http://www.abebooks.com/TJ60-Lightweight-Flexible-Turbojet-Supersonic-Transport/6116090059/bd
« Last Edit: October 27, 2013, 02:27:01 am by blackkite »


Offline blackkite

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #12 on: November 04, 2013, 01:01:49 am »
Hi! I imagine that TJ70 engine had a almost same cross section shape of TJ60 engine.
« Last Edit: November 04, 2013, 04:21:45 am by blackkite »

Offline blackkite

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #13 on: November 04, 2013, 02:58:50 am »
Key technology of this engine was variable area turbine nozzle.
Is this technology same as variable angle of attack turbine inlet stator?
« Last Edit: November 04, 2013, 03:05:38 am by blackkite »

Offline blackkite

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #14 on: November 04, 2013, 04:58:04 am »
Hi! From "High speed dreams"

Offline blackkite

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Offline blackkite

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #16 on: November 15, 2013, 09:53:36 pm »

Offline charleybarley

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #17 on: November 16, 2013, 04:27:24 pm »
Quote
Key technology of this engine was variable area turbine nozzle.
Is this technology same as variable angle of attack turbine inlet stator?

I guess the technology would much more difficult for the variable AoA stator but the end result basically the same, ie change in area, although the TJ60 looks a very crude way to change area. Also the blade is cooled but the blockage flap doesn't seem to be.
The TJ60 variable turbine is the gas gen turbine and very hot.
The only variable turbine stators I have read about are for power turbines (marine, industrial) so are somewhat cooler.


Offline George Allegrezza

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #18 on: November 16, 2013, 05:30:41 pm »
Hi! P&W JT-11- F4 SST turbofan engine.


P&W submitted a duct-burning turbofan design for the for the SST, the JTF17.  It was designed about a decade after the J91, which was the Pratt B-70 candidate engine and the direct ancestor of the original Navy J58, the J58-P-2.  The JTF17 had about double the mass flow of the J58.   

Offline blackkite

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #19 on: November 17, 2013, 01:02:54 am »
Thank you gentlemen! Nice informations. :)

Offline blackkite

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Re: US Pratt & Whitney/Curtiss-Wright SST Engines
« Reply #20 on: November 18, 2013, 03:35:59 am »
Hi! TJ60 from Curtiss Wright document. I will post all of document. Please enjoy.
DBTF means duct burning turbo fan engine.
« Last Edit: November 18, 2013, 03:41:22 am by blackkite »

Offline flateric

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