Wednesday, April 16, 2008
Pilot's notes on SR71
In April 1986, following an attack on American soldiers in a
Berlin
>> disco, President Reagan ordered the bombing of Muammar Qaddafi's
>> terrorist
>> camps in Libya . My duty was to fly over Libya and take photos
recording
>> the damage our F-111's had inflicted. Qaddafi had established a
'line of
>> death,' a territorial marking across the Gulf of Sidra , swearing to
>> shoot
>> down any intruder that crossed the boundary. On the morning of April
15,
>> I
>> rocketed past the line at 2,125 mph.
>>
>> I was piloting the SR-71 spy plane, the world's fastest jet,
>> accompanied by Maj Walter Watson, the aircraft's reconnaissance
systems
>> officer (RSO). We had crossed into Libya and were approaching our
final
>> turn over the bleak desert landscape when Walter informed me that he
was
>> receiving missile launch signals. I quickly increased our speed,
>> calculating the time it would take for the weapons-most likely SA-2
and
>> SA-4 surface-to-air missiles capable of Mach 5 - to reach our
altitude. I
>> estimated that we could beat the rocket-powered missiles to the turn
and
>> stayed our course, betting our lives on the plane's performance.
>>
>>
>> After several agonizingly long seconds, we made the turn and
>> blasted
>> toward the Mediterranean . 'You might want to pull it back,' Walter
>> suggested. It was then that I noticed I still had the throttles full
>> forward. The plane was flying a mile every 1.6 seconds, well above
our
>> Mach 3.2 limit. It was the fastest we would ever fly. I pulled the
>> throttles to idle just south of Sicily , but we still overran the
>> refueling tanker awaiting us over Gibraltar
>>
>>
>> Scores of significant aircraft have been produced in the 100
years
>> of flight, following the achievements of the Wright brothers, which
we
>> celebrate in December. Aircraft such as the Boeing 707, the F-86
Sabre
>> Jet, and the P-51 Mustang are among the important machines that have
>> flown
>> our skies. But the SR-71, also known as the Blackbird, stands alone
as a
>> significant contributor to Cold War victory and as the fastest plane
>> ever-and only 93 Air Force pilots ever steered the 'sled,' as we
called
>> our aircraft.
>>
>>
>> As inconceivable as it may sound, I once discarded the plane.
>> Literally. My first encounter with the SR-71 came when I was 10
years old
>> in the form of molded black plastic in a Revell kit. Cementing
together
>> the long fuselage parts proved tricky, and my finished product
looked
>> less
>> than menacing. Glue,oozing from the seams, discolored the black
plastic.
>> It seemed ungainly alongside the fighter planes in my collection,
and I
>> threw it away.
>>
>> Twenty-nine years later, I stood awe-struck in a Beale Air
Force
>> Base hangar, staring at the very real SR-71 before me. I had applied
to
>> fly the world's fastest jet and was receiving my first walk-around
of our
>> nation's most prestigious aircraft. In my previous 13 years as an
Air
>> Force fighter pilot, I had never seen an aircraft with such
presence. At
>> 107 feet long, it appeared big, but far from ungainly.
>>
>>
>> Ironically, the plane was dripping, much like the misshapen
model
>> had assembled in my youth. Fuel was seeping through the joints,
raining
>> down on the hangar floor. At Mach 3, the plane would expand several
>> inches
>> because of the severe temperature, which could heat the leading edge
of
>> the wing to 1,100 degrees. To prevent cracking, expansion joints had
been
>> built into the plane. Sealant resembling rubber glue covered the
seams,
>> but when the plane was subsonic, fuel would leak through the joints.
>>
>> The SR-71 was the brainchild of Kelly Johnson, the famed
Lockheed
>> designer who created the P-38, the F-104 Starfighter, and the U-2.
After
>> the Soviets shot down Gary Powers' U-2 in 1960, Johnson began to
develop
>> an aircraft that would fly three miles higher and five times faster
than
>> the spy plane-and still be capable of photographing your license
plate.
>> However, flying at 2,000 mph would create intense heat on the
aircraft's
>> skin. Lockheed engineers used a titanium alloy to construct more
than 90
>> percent of the SR-71, creating special tools and manufacturing
procedures
>> to hand-build each of the 40 planes. Special heat-resistant fuel,
oil,
>> and
>> hydraulic fluids that would function at 85,000 feet and higher also
had
>> to
>> be developed.
>>
>>
>> In 1962, the first Blackbird successfully flew, and in 1966,
the
>> same year I graduated from high school, the Air Force began flying
>> operational SR-71 missions. I came to the program in 1983 with a
sterling
>> record and a recommendation from my commander, completing the
weeklong
>> interview and meeting Walter, my partner for the next four years He
would
>> ride four feet behind me, working all the cameras, radios, and
electronic
>> jamming equipment. I joked that if we were ever captured, he was the
spy
>> and I was just the driver. He told me to keep the pointy end
forward.
>>
>> We trained for a year, flying out of Beale AFB in California ,
>> Kadena Airbase in Okinawa, and RAF Mildenhall in England . On a
typical
>> training mission, we would take off near Sacramento, refuel over
Nevada,
>> accelerate into Montana, obtain high Mach over Colorado, turn right
over
>> New Mexico, speed across the Los Angeles Basin, run up the West
Coast,
>> turn right at Seattle, then return to Beale. Total flight time: two
hours
>> and 40 minutes.
>>
>> One day, high above Arizona , we were monitoring the radio
traffic
>> of all the mortal airplanes below us. First, a Cessna pilot asked
the air
>> traffic controllers to check his ground speed. 'Ninety knots,' ATC
>> replied. A twin Bonanza soon made the same request. 'One-twenty on
the
>> ground,' was the reply. To our surprise, a navy F-18 came over the
radio
>> with a ground speed check. I knew exactly what he was doing. Of
course,
>> he
>> had a ground speed indicator in his cockpit, but he wanted to let
all the
>> bug-smashers in the valley know what real speed was 'Dusty 52, we
show
>> you
>> at 620 on the ground,' ATC responded. The situation was too ripe. I
heard
>> the click of Walter's mike button in the rear seat. In his most
innocent
>> voice, Walter startled the controller by asking for a ground speed
check
>> from 81,000 feet, clearly above controlled airspace. In a cool,
>> professional voice, the controller replied, ' Aspen 20, I show you
at
>> 1,982 knots on the ground.' We did not hear another transmission on
that
>> frequency all the way to the coast.
>>
>>
>> The Blackbird always showed us something new, each aircraft
>> possessing its own unique personality. In time, we realized we were
>> flying
>> a national treasure. When we taxied out of our revetments for
takeoff,
>> people took notice. Traffic congregated near the airfield fences,
because
>> everyone wanted to see and hear the mighty SR-71 You could not be a
part
>> of this program and not come to love the airplane. Slowly, she
revealed
>> her secrets to us as we earned her trust.
>>
>> One moonless night, while flying a routine training mission
over
>> the
>> Pacific, I wondered what the sky would look like from 84,000 feet if
the
>> cockpit lighting were dark. While heading home on a straight course,
I
>> slowly turned down all of the lighting, reducing the glare and
revealing
>> the night sky. Within seconds, I turned the lights back up, fearful
that
>> the jet would know and somehow punish me. But my desire to see the
sky
>> overruled my caution, I dimmed the lighting again. To my amazement,
I saw
>> a bright light outside my window. As my eyes adjusted to the view, I
>> realized that the brilliance was the broad expanse of the Milky Way,
now
>> a
>> gleaming stripe across the sky. Where dark spaces in the sky had
usually
>> existed, there were now dense clusters of sparkling stars Shooting
stars
>> flashed across the canvas every few seconds. It was like a fireworks
>> display with no sound. I knew I had to get my eyes back on the
>> instruments, and reluctantly I brought my attention back inside. To
my
>> surprise, with the cockpit lighting still off, I could see every
gauge,
>> lit by starlight. In the plane's mirrors, I could see the eerie
shine of
>> my gold spacesuit incandescently illuminated in a celestial glow. I
stole
>> one last glance out the window. Despite our speed, we seemed still
before
>> the heavens, humbled in the radiance of a much greater power. For
those
>> few moments, I felt a part of something far more significant than
>> anything
>> we were doing in the plane. The sharp sound of Walt's voice on the
radio
>> brought me back to the tasks at hand as I prepared for our descent.
>>
>> San Diego Aerospace Museum
>> The SR-71 was an expensive aircraft to operate. The most
>> significant
>> cost was tanker support, and in 1990, confronted with budget
cutbacks,
>> the
>> Air Force retired the SR-71.?The Blackbird had outrun nearly 4,000
>> missiles, not once taking a scratch from enemy fire.
>>
>> On her final flight, the Blackbird, destined for the
Smithsonian
>> National Air and Space Museum , sped from Los Angeles to Washington
in 64
>> minutes, averaging 2,145 mph and setting four speed records.
>>
>> The SR-71 served six presidents, protecting America for a
quarter
>> of
>> a century. Unbeknownst to most of the country, the plane flew over
North
>> Vietnam , Red China, North Korea , the Middle East, South Africa ,
Cuba ,
>> Nicaragua , Iran , Libya , and the Falkland Islands On a weekly
basis,
>> the
>> SR-71 kept watch over every Soviet nuclear submarine and mobile
missile
>> site, and all of their troop movements. It was a key factor in
winning
>> the
>> Cold War.
>>
>>
>> I am proud to say I flew about 500 hours in this aircraft. I
knew
>> her well. She gave way to no plane, proudly dragging her sonic boom
>> through enemy backyards with great impunity. She defeated every
missile,
>> outran every MiG, and always brought us home. In the first 100 years
of
>> manned flight, no aircraft was more remarkable.
>>
>> With the Libyan coast fast approaching now, Walt asks me for
the
>> third time, if I think the jet will get to the speed and altitude we
want
>> in time. I tell him yes. I know he is concerned. He is dealing with
the
>> data; that's what engineers do, and I am glad he is. But I have my
hands
>> on the stick and throttles and can feel the heart of a thoroughbred,
>> running now with the power and perfection she was designed to
possess. I
>> also talk to her. Like the combat veteran she is, the jet senses the
>> target area and seems to prepare herself.
>>
>> For the first time in two days, the inlet door closes flush
and all
>> vibration is gone. We've become so used to the constant buzzing that
the
>> jet sounds quiet now in comparison. The Mach correspondingly
increases
>> slightly and the jet is flying in that confidently smooth and steady
>> style
>> we have so often seen at these speeds. We reach our target altitude
and
>> speed, with five miles to spare. Entering the target area, in
response to
>> the jet's new-found vitality, Walt says, 'That's amazing' and with
my
>> left
>> hand pushing two throttles farther forward, I think to myself that
there
>> is much they don't teach in engineering school.
>>
>> Out my left window, Libya looks like one huge sandbox. A
>> featureless
>> brown terrain stretches all the way to the horizon. There is no sign
of
>> any activity. Then Walt tells me that he is getting lots of
electronic
>> signals, and they are not the friendly kind. The jet is performing
>> perfectly now, flying better than she has in weeks. She seems to
know
>> where she is. She likes the high Mach, as we penetrate deeper into
Libyan
>> airspace. Leaving the footprint of our sonic boom across Benghazi ,
I sit
>> motionless, with stilled hands on throttles and the pitch control,
my
>> eyes
>> glued to the gauges.
>>
>> Only the Mach indicator is moving, steadily increasing in
>> hundredths, in a rhythmic consistency similar to the long distance
runner
>> who has caught his second wind and picked up the pace. The jet was
made
>> for this kind of performance and she wasn't about to let an errant
inlet
>> door make her miss the show. With the power of forty locomotives, we
>> puncture the quiet African sky and continue farther south across a
bleak
>> landscape.
>>
>> Walt continues to update me with numerous reactions he sees on
the
>> DEF panel. He is receiving missile tracking signals. With each mile
we
>> traverse, every two seconds, I become more uncomfortable driving
deeper
>> into this barren and hostile land. I am glad the DEF panel is not in
the
>> front seat. It would be a big distraction now, seeing the lights
>> flashing.
>> In contrast, my cockpit is 'quiet' as the jet purrs and relishes her
>> new-found strength, continuing to slowly accelerate.
>>
>> The spikes are full aft now, tucked twenty-six inches deep
into the
>> nacelles. With all inlet doors tightly shut, at 3.24 Mach, the J-58s
are
>> more like ramjets now, gulping 100,000 cubic feet of air per second.
We
>> are a roaring express now, and as we roll through the enemy's
backyard, I
>> hope our speed continues to defeat the missile radars below. We are
>> approaching a turn, and this is good. It will only make it more
difficult
>> for any launched missile to solve the solution for hitting our
aircraft.
>>
>> I push the speed up at Walt's request. The jet does not skip a
>> beat,
>> nothing fluctuates, and the cameras have a rock steady platform.
Walt
>> received missile launch signals. Before he can say anything else, my
left
>> hand instinctively moves the throttles yet farther forward. My eyes
are
>> glued to temperature gauges now, as I know the jet will willingly go
to
>> speeds that can harm her. The temps are relatively cool and from all
the
>> warm temps we've encountered thus far, this surprises me but then,
it
>> really doesn't surprise me. Mach 3.31 and Walt is quiet for the
moment.
>>
>> I move my gloved finder across the small silver wheel on the
>> autopilot panel which controls the aircraft's pitch. With the deft
feel
>> known to Swiss watchmakers, surgeons, and 'dinosaurs' (old- time
pilots
>> who not only fly an airplane but 'feel it'), I rotate the pitch
wheel
>> somewhere between one-sixteenth and one-eighth inch location, a
position
>> which yields the 500-foot-per-minute climb I desire. The jet raises
her
>> nose one-sixth of a degree and knows, I'll push her higher as she
goes
>> faster. The Mach continues to rise, but during this segment of our
route,
>> I am in no mood to pull throttles back.
>>
>> Walt's voice pierces the quiet of my cockpit with the news of
more
>> missile launch signals. The gravity of Walter's voice tells me that
he
>> believes the signals to be a more valid threat than the others.
Within
>> seconds he tells me to 'push it up' and I firmly press both
throttles
>> against their stops. For the next few seconds, I will let the jet go
as
>> fast as she wants. A final turn is coming up and we both know that
if we
>> can hit that turn at this speed, we most likely will defeat any
missiles.
>> We are not there yet, though, and I'm wondering if Walt will call
for a
>> defensive turn off our course.
>>
>> With no words spoken, I sense Walter is thinking in concert
with me
>> about maintaining our programmed course. To keep from worrying, I
glance
>> outside, wondering if I'll be able to visually pick up a missile
aimed at
>> us. Odd are the thoughts that wander through one's mind in times
like
>> these. I found myself recalling the words of former SR-71 pilots who
were
>> fired upon while flying missions over North Vietnam They said the
few
>> errant missile detonations they were able to observe from the
cockpit
>> looked like implosions rather than explosions. This was due to the
great
>> speed at which the jet was hurling away from the exploding missile.
>>
>> I see nothing outside except the endless expanse of a steel
blue
>> sky
>> and the broad patch of tan earth far below. I have only had my eyes
out
>> of
>> the cockpit for seconds, but it seems like many minutes since I have
last
>> checked the gauges inside. Returning my attention inward, I glance
first
>> at the miles counter telling me how many more to go, until we can
start
>> our turn Then I note the Mach, and passing beyond 3.45, I realize
that
>> Walter and I have attained new personal records. The Mach continues
to
>> increase. The ride is incredibly smooth.
>>
>> There seems to be a confirmed trust now, between me and the
jet;
>> she
>> will not hesitate to deliver whatever speed we need, and I can count
on
>> no
>> problems with the inlets. Walt and I are ultimately depending on the
jet
>> now - more so than normal - and she seems to know it. The cooler
outside
>> temperatures have awakened the spirit born into her years ago, when
men
>> dedicated to excellence took the time and care to build her well.
With
>> spikes and doors as tight as they can get, we are racing against the
time
>> it could take a missile to reach our altitude.
>>
>> It is a race this jet will not let us lose. The Mach eases to
3.5
>> as
>> we crest 80,000 feet. We are a bullet now - except faster. We hit
the
>> turn, and I feel some relief as our nose swings away from a country
we
>> have seen quite enough of. Screaming past Tripoli , our phenomenal
speed
>> continues to rise, and the screaming Sled pummels the enemy one more
>> time,
>> laying down a parting sonic boom. In seconds, we can see nothing but
the
>> expansive blue of the Mediterranean . I realize that I still have my
left
>> hand full-forward and we're continuing to rocket along in maximum
>> afterburner.
>>
>> The TDI now shows us Mach numbers, not only new to our
experience
>> but flat out scary. Walt says the DEF panel is now quiet, and I know
it
>> is
>> time to reduce our incredible speed. I pull the throttles to the min
>> 'burner range and the jet still doesn't want to slow down. Normally
the
>> Mach would be affected immediately, when making such a large
throttle
>> movement But for just a few moments old 960 just sat out there at
the
>> high
>> Mach, she seemed to love and like the proud Sled she was, only began
to
>> slow when we were well out of danger. I loved that jet.
>>