Possible McDonnell Douglas QRI-related configuration


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I may be wrong, and it can be just generic configuration. Surely this thing would be *fast* one. It goes from MDC 1970s paper presented at 1970 AIAA Fighter Conference in St.Louis. Anyone have seen it before?


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Yes. I may have a similar concept drawing.
If I recall, the drawing is from the same time.
I will post this evening.

Do you have a referdnce to the paper?

If I recall correctly, my drawing has a caption that indicates
turbofan-ramjets were to power it.

The cockpit area and nose looks very similar. The inlets on the
underside are 2-D however and not 3-D.

You'll note, that the front view doesn't really match the side view.
My drawing could match the side view fiarly closely, but my view
is a left front quarter view of the airplane climbing out.

I'll post tonight.
This may be helpful: The first pic I got off the net years ago, the second is from AW&ST.


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Probably related design shown in a bit of Keith Ferris artwork. Note the dorsal inlets... which you can see faired-over on the wind tunnel model.


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Hi overscan! My opinion is same as yours!
Turbofan ramjet engine! Very impressive. Some kind of variable cycle engine?
Is it fail to develop?
Yes Elider, your top concept photo, that's it!
The photo in the book is larger.

That is Photo 168 in "US Jet Fighters Since 1945" by Robert F. Dorr
copyright 1988
Blandford War Photo-Files

"One of the fighter designs which never got off the drawing board
was this McDonnell proposal, dating to August 1968 and studied
in the 1970s, for a hypersonic interceptor to be powered by very
powerful fan jet engines. MDC"
blackkite said:
Hi overscan! My opinion is same as yours!
Turbofan ramjet engine! Very impressive. Some kind of variable cycle engine?
Is it fail to develop?

The technology for these kinds of engines are still being developed.
For example, the recent GE57 studied under the Revolutionary Turbine
Accelerator (RTA) program, which was for a ground demonstration engine
to demonstrate mode transition from an augmented turbofan to a ramjet
to demonstrate the thrust level required to accelerate a future hypersonic
vehicle to scramjet take over speed.
"US Jet Fighters Since 1945" by Robert F. Dorr

Shockonlip, If my memory is right I remember in the book there was also a drawing of McDD VFX and also an ATF concepts. Could you post if too?.

Many thanks in advance,

shockonlip said:
Do you have a referdnce to the paper?

AIAA No. 70-364
Dr. W. B. Herbst and H. G. ROSS
Engineering Technology Division
McDonnell Douglas Corporation
St. Louis, Missouri

All said is that "...figure is showing a computer-generated drawing of a high speed aircraft."
Evidently, I don't have a high resolution scanner. The result
doesn't look anything like the quality of the original.

While trying to scan, I also realized that to properly scan these,
I'd have to remove the pages from the book as well.

So, sorry.

Just for my information, what do people use for a high quality scanner?
For example, any start-level Epson scanner in USD $100 range will feet. Scan higher than 300 dpi resolution is just no need.
Epson Perfection V300 Photo $99.99
Epson Perfection 4490 Photo $119.99 with $30.00 Mail-In Rebate (one that I use)

Both are free ground shipping directly from Epson USA site. I think that you even can find them much cheaper now.

Don't buy these attractive, thin scanners using CIS-technology - they are looking cool, but scans are awful, buy those 'thick' using CCD image sensor.


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Having said that, any scanner can produce OK results if you know how to use it correctly. Scanning a photo is easy but scanning from a book is tricky as the image in the book is made of lots of dots in a pattern. When you scan, this dot pattern can cause nasty patterns to appear in the scan. Many scanners will have an option to reduce this effect usually called "descreen". Sometimes changing the scan dpi up or down can reduce visible artifacts too.

Another way to get a decent image is to scan at a very high resolution (600dpi or more) and then use a "gaussian blur" operation in a photo editing package. Alter the blur size until dots blend together and the pattern just disappears. Then size the picture down to a web-friendly size.
Haha, I'm not in a hurry to buy another Epson product, but flateric's scanner advice is what you want to follow.
i use one of these, but then i always did go in for a bit of overkill... ;D ::)



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I'll bet Airrocket has something to add to these procedings. He's cool about the old McD projects of this nature.
I'd say from the same family tree. Our friends in the know on this forum, feel free to contribute. If you can, of course.

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