Blackbird
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JTF-17A: Anybody Know Anything About This?

Wed Jan 24, 2007 10:39 am

I know it was a low-bypass continuously-afterburning turbofan, designed primarily for the L-2000-7A SST.

I'm just wondering if there is any more information available on this engine?

Andrea K
 
747400sp
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Joined: Sat Aug 09, 2003 7:27 pm

RE: JTF-17A: Anybody Know Anything About This?

Wed Jan 24, 2007 12:25 pm

I believe it had 50000+ lb of thrust dry and 63000 lb of thrust wet.
 
Blackbird
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RE: JTF-17A: Anybody Know Anything About This?

Thu Jan 25, 2007 2:19 am

I actually already knew that part. I thought it was 61,000 or 62,000 lbs wet (53,000 lbs dry). But I was more wondering stuff like what it's bypass ratio was, it's diamater and length, fuel efficency, etc.

Andrea K
 
Starglider
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Joined: Sun Oct 01, 2006 12:19 am

RE: JTF-17A: Anybody Know Anything About This?

Thu Jan 25, 2007 7:01 am

Quoting Blackbird (Reply 2):
But I was more wondering stuff like what it's bypass ratio was, it's diamater and length, fuel efficency, etc

Try this link, it will lead you to a report about the JTF17A-20B for the Boeing Model 733-394:

http://handle.dtic.mil/100.2/AD378635



Regards,
Starglider
 
Blackbird
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RE: JTF-17A: Anybody Know Anything About This?

Thu Jan 25, 2007 10:30 am

Thank you for your help.

The only thing left basically would be... Do you have any idea what the bypass-ratio was, or how many compressor/turbine stages there are?

Andrea K
 
N231YE
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Joined: Tue Jul 25, 2006 9:24 am

RE: JTF-17A: Anybody Know Anything About This?

Thu Jan 25, 2007 11:16 am

You might want to read this thread: GE GE4/J5P & PW JTF-17 Size (by 747400sp Feb 18 2006 in Tech Ops)

Quoting B2707SST (Reply 3):
The JTF17A-21L proposed for the Lockheed L-2000 was a low-bypass turbofan with afterburning capability in the bypass duct only (a "duct-burning turbofan"). It was to generate 60,760 lbs. of augmented or 38,130 lbs. of non-augmented thrust at takeoff. Bypass ratio was 1.3:1.
 
Blackbird
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RE: JTF-17A: Anybody Know Anything About This?

Thu Jan 25, 2007 11:36 am

Acknowledged,

Andrea K
 
N231YE
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Joined: Tue Jul 25, 2006 9:24 am

RE: JTF-17A: Anybody Know Anything About This?

Thu Jan 25, 2007 11:46 am

I might be able to find some information on the JTF-17 compressor/turbine stages...but the key word is 'might.'

I have a book with the history of every aircraft engine manufacturer in the world that has ever existed throughout history. However, it is at my house on on side of the state, with my university's dorm (where I am currently at) on the other. I will try to drive home this weekend (weather permitting) and look this up.
 
747400sp
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RE: JTF-17A: Anybody Know Anything About This?

Thu Jan 25, 2007 2:14 pm

I would say, think about a P&W 2000 size JT8.

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