The Real X-Jet
From Transformers to the X-Men, the Blackbird is still Hollywood's favorite futuristic jet. Here's the real story of its birth.
- By William E. Burrows
- AirSpaceMag.com, March 01, 1999
(Page 5 of 7)
Pratt & Whitney’s Arnold Gunderson has thought a lot about his supremely powerful but high-strung engine. The J-58 is complex, and each of its systems is coupled in some obscure way with other systems, which meant that all these relationships had to be learned.
“Every time you make an improvement, you’ve ruined or degraded something else,” Gunderson observes. “If you optimize something here, you’ve made it significantly less optimal somewhere else. Now, you’ve got an engine, which is a highly complex thing, with its own internal subsystems. You’ve got a completely self-contained afterburner control system, a self-contained main engine control system. You’ve got the spike going back and forth along its 26-inch path. You’ve got the four bypass doors that regulate the static pressure inside the duct. When they’re closed, it’s maximum ram recovery. When they’re open, you create drag. All of these things affect the entire propulsion system. Now, that’s just the main features.... Every time we made a minor change in how the engine worked,” he adds, “it had to go back into an integrated engineering approach with the entire propulsion system.”
The problems plaguing the engine in the beginning caused delays of months and would have financially broken the program had the Navy not bailed it out with $38 million. Every serious problem that afflicted the J-58 was given a number, and the list eventually reached more than 270. “ENC—Exhaust Nozzle Control instability—was problem number 6,” Gunderson says. “It was still an active problem in 1974. Even then we were trying to figure ways to keep the engine stable. As you can imagine, it goes back a long, long way.”
Some J-58s, like a couple of the airplanes they powered, absolutely refused to work properly no matter what was done to them. Gunderson says that any J-58 whose parts were fundamentally unhappy with one another for no apparent reason was disassembled and their parts saved to repair other engines.
The SR-71s also had marked differences. Thomas maintains that each Blackbird had a distinct personality and that careful records documented them as clearly as diary entries. “I could tell you something different about each one of those airplanes,” he says. Number 974, which perished in the South China Sea near Luzon after a catastrophic engine failure, gave its crews all it had. Justin Murphy agrees, and says the same about 971. Author and former SR-71 pilot Richard Graham swears that 962 “never let us down.” But 959 was a hangar queen, an absolute “lemon,” according to Thomas. “You could never get everything to work at the same time. The Air Force said, ‘Come and get it. We don’t want it.’ ” There were also problems with the defensive system, but they were philosophical, not technical. Johnson believed so strongly that his supersonic spyplanes would be adequately protected above 80,000 feet at Mach 3.2 that he vigorously resisted equipping them with electronic countermeasures.
Wheelon recalls that he tangled with the always weight-conscious Johnson over ECM too. Wheelon won, and as a result, the A-12 and SR-71 were equipped with the newest defensive systems.
And the opposition never gave up the notion of trying to bag one, as it had Francis Gary Powers’ U-2. He can’t recall the precise designation but Gunderson remembers a Soviet missile that had the theoretical capability of flying up in front of an SR-71, then plunging down and hitting it at Mach 6—a nearly impossible feat because there was almost no warning that the airplane was coming. Still, there was always the possibility that one would get hit by a “golden BB.”
It was certainly in the back of the Air Force’s collective mind. The airmen were concerned that if the airplane went down carrying ECM hardware all of the fighters and bombers that carried the same equipment would be compromised. Yet not installing it could have hastened the day when one of the high fliers was shot down.
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Comments (9)
Bouroughs did a great job of describing the machine development. However he did overlook the J-58 engine's need for a ground based Starter Cart (2 Buick Wildcat V-8s) and that the JP-7 required an "exotic" igniter called TEB ( Tri-Ethyl-Borate).
To see some of the personal experiences on the A-12, go to the following web sites:
http://www.habu.org/a-12/06932.html
http://www.wvi.com/~lelandh/m21_Crash.html
http://www.roadrunnersinternationale.com/oxcart_pilot_training.html
There are a number of pilot's stories under the Roadrunners...
Posted by Edward Power on June 11,2011 | 12:26 PM
This is a very interesting piece. I am a retired Navy Civil Servant. I was an electronics engineer for 25 yrs with the Navy Civil Service. My Dad worked for Lockheed during the Kelly Johnson years. He was superintendant over the skunk works tooling dept, 3rd under Kelly Johnson. His name was Edwin C. Mort. He passed away early January of 1989.
This piece answers many questions I have had about the "Black Bird".
Posted by Richard E. Mort on June 11,2011 | 08:58 PM
My father worked for General Electric from 1945-84
and did work with a lot of other companies during
that time.
One such company was the Skunk Works during Kelley Johnson's time and I remember the Blackbird being
refered to as the YF-12A.
My father worked with a lot of space exploration programs(Including the X-15 during Harrison "Stormy" Storms time)
defense projects and commercial aviation jobs(The SST program with Boeing until President Nixon axed it in 1971)
I've always been interested in what my father did BUT just
didn't have the math or science knowledge to persue it. I
still read LOTS of science fiction. Sir Arthur C Clarke
was both our favorite author.
My father lived from 1919-1995 and I was born in 1949.
Thanx! for letting me ramble on a bit.
Great piece on the Blackbird...
06 16 11
Posted by Don Ducker Jnr on June 16,2011 | 09:11 AM
Now 12 years later Annie Jacobsen has written Area 51, and in there is a lot of information about Oxcart, the Skunkworks and other formerly classified projects.
Posted by PeterK on June 23,2011 | 05:54 PM
The SR-71 also served as the artistic inspiration for a cover illustration (http://www.isfdb.org/wiki/images/a/a9/ANLGJUL68.jpg) for a novella by Dean McLaughlin in the July 1968 issue of Analog Magazine. The artist was the late Frank Kelly Freas who depicts an SR-71-like aircraft looming over WWI fighters as a result of the 20th Century airplane arriving unexpectedly over France in 1918. The story somewhat humorously depicts the frustration of the modern airplane's sole pilot who discovers that his modern missiles can't shoot down wood and fabric biplanes with tiny radial engines.
Posted by Diana Powe on June 24,2011 | 05:33 AM
Excellent work Mr.Burrows. Nothing captures my imagination like the Blackbird. Not even my beloved Corsair.
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Posted by Hank Armstrong on June 24,2011 | 10:19 AM
It is just breathtaking to think of the 'Murderers' Row' of engineering, design, and fabrication talent that Kelly Johnson surrounded himself with in the 50's and 60's at Lockheed's SkunkWorks. Of course, the Cold War-driven unlimited budgets and different gov't/defense contractor relationships of that time enabled a lot of innovation, but to imagine the history-altering aircraft these guys dreamed up and built is just amazing. With slide rules and calipers and feeler gauges . . . .
Like Ben Rich spoke about in his book, SKUNK WORKS, these groups of guys in white shirts and ties and pocket protectors, justifying their blueprints over cigarettes and coffee and slide rules to crusty, seen-everything fabricators whose experience tempered their ideas must have been an intoxicating atmosphere. I often think THAT's why it was buried behind layers of Black World secrecy: They were just having too much fun making history, one rivet at a time.
Posted by Joey Wilson on July 8,2011 | 01:20 AM