In a mirror near the capsule window, I could see the blockhouse and back across the Cape. The periscope gave me a view out over the Atlantic. It was turning into a fine day. I felt a little bit like the way I had felt going into combat. There you are, ready to go; you know all the procedures and there’s nothing left to do but just do it. People have always asked if I was afraid. I wasn’t. Constructive apprehension is more like it. I was keyed up and alert to everything that was going on, and I had full knowledge of the situation – the best antidote to fear. Besides, this was the fourth time I had suited up, and I still had trouble believing I would actually take off.
Pipes whined and creaked below me; the booster shook and thumped when the crew gimballed the engines. I clearly was sitting on a huge, complex machine. We had joked that we were riding into space on a collection of parts supplied by the lowest bidder on a government contract, and I could hear them all.
At T minus thirty-five minutes, I heard the order to top off the lox tanks. Instantly the voices in my headset vibrated with a new excitement. We’d never gotten this far before. Topping off the lox tanks was a landmark in the countdown. The crew had begun to catch “go fever.”
There was a hold at twenty-two minutes when a lox valve stuck, and another at six minutes to solve an electrical power failure at the tracking station in Bermuda. Then the minutes dwindled into seconds.
At eighteen seconds the countdown switched to automatic, and I thought for the first time that it was going to happen. At four seconds I felt rather than heard the rocket engines stir to life sixty-five feet below me. The hold-down clamps released with a thud. The count reached zero at 9:47 am.
My earphones didn’t carry Scott’s parting message: “Godspeed, John Glenn.” Tom O’Malley, General Dynamics’ test director, added, “May the good Lord ride with you all the way.”
Liftoff was slow. The Atlas’s 367,000 pounds of thrust were barely enough to overcome its 125 ton weight. I wasn’t really off until the forty-two-inch umbilical cord that took electrical connections to the base of the rocket pulled loose. That was my last connection with Earth. It took the two boosters and the sustainer engine three seconds of fire and thunder to lift the thing that far. From where I sat the rise seemed ponderous and stately, as if the rocket were an elephant trying to become a ballerina. Then the mission elapsed-time clock on the cockpit panel ticked into life and I could report, “The clock is operating. We’re under way.”
I could hardly believe it. Finally!
The rocket rolled and headed slightly north of east. At thirteen seconds I felt a little shudder. “A little bumpy along about here,” I reported. The G forces started to build up. The engines burned fuel at an enormous rate, one ton a second, more in the first minute than a jet airliner flying coast to coast, and as the fuel was consumed the rocket grew lighter and rose faster. At forty-eight seconds I began to feel the vibration associated with high Q, the worst seconds of aerodynamic stress, when the capsule was pushing through air resistance amounting to almost a thousand pounds per square foot. The shaking got worse, then smoothed out at 1:12, and I felt the relief of knowing that I was through max Q, the part of the launch where the rocket was most likely to blow.
At 2:09 the booster engines cut off and fell away. I was miles high and forty-five miles from the Cape. The rocket pitched forward for the few seconds it took for the escape tower’s jettison rocket to fire, taking the half-ton tower away from the capsule. The G forces fell to just over one. Then the Atlas pitched up again and, driven by the sustainer engine and the two smaller vernier engines, made course corrections, resumed its acceleration toward a top speed of 17,545 miles per hour in the ever-thinning air. Another hurdle passed. Another instant of relief.
Pilots gear their moments of greatest attention to the times when flight conditions change. When you get through them, you’re glad for a fraction of a second, and then you think about the next thing you have to do.
The Gs built again, pushing me back into the couch. The sky looked dark outside the window. Following the flight plan, I repeated the fuel, oxygen, cabin pressure, and battery readings from the dials in front of me in the tiny cabin. The arc of the flight was taking me out over Bermuda. “Cape is go and I am go. Capsule is in good shape,” I reported.
“Roger. Twenty seconds to SECO.” That was Al Shephard on the capsule communicator’s microphone at mission control, warning me that the next crucial moment – sustainer engine cutoff – was seconds away.
Five minutes into the flight, if all went well, I would achieve orbital speed, hit zero G, and, if the angle of ascent was right, be inserted into orbit at a height of about a hundred miles. The sustainer and vernier engines would cut off, the capsule-to-rocket clamp would release, the posigrade rockets would fire to separate Friendship 7 from the Atlas.
It happened as programmed. The weight and fuel tolerances were so tight that the engines had less than three seconds’ worth of fuel remaining when I hit that keyhole in the sky. Suddenly I was no longer pushed back against the seat but had a momentary sensation of tumbling forward.
“Zero G and I feel fine,” I said exultantly. “Capsule turning around.” Through the window I could see the curve of Earth and its thin film of atmosphere. “Oh,” I exclaimed, “that view is tremendous!”
The capsule continued to turn until it reached its normal orbital attitude, blunt end forward. It was flying east and I looked back to the west. There was the spent tube of the Atlas making slow pirouettes behind me, sunlight glinting from its metal skin. It was beautiful, too.
Al’s voice came in my earphones. “Roger, Seven. You have a go, at least seven orbits.”
That was the best possible news. I was higher than space flight when I heard that. The mission was planned for three orbits, but it meant that I could go for at least seven if I had to. The first set of hurdles was behind me. I loosened the shoulder straps and seat belt that held me to the couch, and prepared to go to work.
The capsule was pitched thirty-four degrees from horizontal in its normal orbital attitude, so I could see back across the ocean to the western horizon. The periscope had automatically deployed and gave me a view to the east in the direction of the capsule’s flight. The worldwide tracking network switched into gear. I talked to Gus, who was the capsule communicator, or capcom, at the Bermuda station. “This is very comfortable at zero G. I have nothing but a very fine feeling. It just feels very normal and very good.”
Over the Canary Islands, almost to the west coast of America, I could still see the Atlas turning behind me. It was a mile away now, and slightly below me, losing ground because I was in a slightly higher orbit. I did a quick check of the capsule’s attitude controls in case I had to make an emergency reentry. Pitch, roll, and yaw were primarily governed by an automatic system in which gyroscopes and sensors sent electrical signals to eighteen one-and five-pound hydrogen peroxide thrusters arrayed around the capsule. In “fly-by-wire” mode, I could use the three-axis control stick to override the automatic system using its same electrical connections. A fully manual system provided redundancy in a variety of attitude control modes. All three systems worked perfectly.
Friendship 7 crossed the African coast twelve minutes after liftoff, a fast transatlantic flight. I reached for the equipment pouch fixed just under the hatch. It used a new invention, a system of nylon hooks and loops called Velcro. I opened the pouch and a toy mouse floated into my vision. It was gray felt, with pink ears and a long tail that was tied to keep it from floating out of reach. I laughed at the mouse which was Al’s joke, a reference to one of comedian Bill Dana’s characters, who always felt sorry for the experimental mice that had gone into space in rocket nose cones.
I reached around the mouse and took out the Minolta camera. Floating under my loosened straps, I found that I had adapted to weightlessness immediately. When I needed both hands, I just let go of the camera and it floated there in front of me. I didn’t have to think about it. It felt natural.
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p; Telemetry was sending signals to the ground about my condition and the condition of the capsule. The capcom at the Canary Islands station asked for a blood pressure check, and I pumped the cuff on my left arm. The EKG and biosensors were sending signals about my heart pulse, and respiration, and the ever-present rectal thermometer was reporting my body temperature. At 18:41 I reported, (“Have a beautiful view of the African coast, both in the scope and out the window. Out the window is the best view by far.”
“Your medical status is green,” Canary capcom reported. I asked for my blood pressure. The capcom reported back that it was 120 over 80, normal.
I took pictures of clouds over the Canaries. At twenty-one minutes, over the Sahara Desert, I aimed the camera at massive dust storms swirling the desert sand.
The tracking station at Kano, Nigeria, came on. I was forty seconds behind on my checklist of tasks, and went to fly-by-wire to check the capsule’s yaw control again. The thrusters moved the capsule easily, and I reported at 26.34, “Attitudes all well within limits. I have no problem holding attitude with fly-by-wire at all. Very easy.”
Over Zanzibar off the East African coast, the site of the fourth tracking station, I pulled thirty times on the bungee cord attached below the control panel. I had done this on the ground, and my reaction was the same: it made me tired and increased my heart rate temporarily – I pumped the blood pressure cuff again for the flight surgeon on the ground. I read the vision chart over the instrument panel with no problem, countering the doctors’ fear that the eyeballs would change shape in weightlessness and impair vision. Head movements caused no sensation, indicating that zero G didn’t attack the balance mechanism of the inner ear. I could reach and easily touch any spot I wanted to, another test of the response to weightlessness. The ease of the adjustment continued to surprise me.
The Zanzibar flight surgeon reported that my blood pressure and pulse had returned to normal after my exertion with the bungee cord. “Everything on the dials indicates excellent aeromedical status,” he said. This was what we had expected from doing similar tests on the procedures trainer.
Flying backward over the Indian Ocean, I began to fly out of daylight. I was now about forty minutes into the flight nearing the 150-mile apogee, the highest point, of my orbital track. Moving away from the sun at 17,500 miles an hour – almost eighteen times Earth’s rotational speed – sped the sunset.
This was something I had been looking forward to, a sunset in space. All my life I have remembered particularly beautiful sunrises or sunsets in the Padfic islands in World War II; the glow in the haze layer in northern China; the two thunderheads out over the Atlantic with the sun silhouetting them the morning of Gus’s launch. I’ve mentally collected them, as an art collector remembers visits to a gallery full of Picassos, Michelangelos, or Rembrandts. Wonderful as man-made art may be, it cannot compare in my mind to sunsets and sunrises, God’s masterpieces. Here on Earth we see the beautiful reds, oranges, and yellows with a luminous quality that no film can fully capture. What would it be like in space?
It was even more spectacular than I imagined, and different in that the sunlight coming through the prism of Earth’s atmosphere seemed to break out the whole spectrum, not just the colors at the red end but the blues, indigos, and violets at the other. It made spectacular an understatement for the few seconds view. From my orbiting front porch, the setting sun that would have lingered during a long earthly twilight sank eighteen times as fast. The sun was fully round and as white as a brilliant arc light, and then it swiftly disappeared and seemed to melt into a long thin line of rainbow-brilliant radiance along the curve of the horizon.
I added my first sunset from space to my collection.
I reported to the capcom aboard the ship, the Ocean Sentry, in the Indian Ocean that was my fifth tracking link, “The sunset was beautiful. I still have a brilliant blue band clear across the horizon, almost covering the whole window.
The sky above is absolutely black, completely black. I can see stars up above.”
Flying on, I could see the night horizon, the roundness of the darkened Earth, and the light of the moon on the clouds below. I needed the periscope to see the moon coming up behind me. I began to search the sky for constellations.
Gordo Cooper’s familiar voice came over the headset as Friendship 7 neared Australia. He was the capcom at the station at Muchea, on the west coast just north of Perth. “That sure was a short day,” I told him.
“Say again, Friendship Seven.”
“That was about the shortest day I’ve ever run into.”
“Kinda passes rapidly, huh?”
“Yes, sir.”
I spotted the Pleiades, a cluster of seven stars. Gordo asked me for a blood pressure reading, and I pumped the cuff again. He told me to look for lights, and I reported, “I see the outline of a town, and a very bright light just to the south of it?” The elapsed-time clock read 54:39. It was midnight on the west coast of Australia.
“Perth and Rockingham, you’re seeing there,” Gordo told me.
“Roger. The lights show up very well, and thank everybody for turning them on, will you?”
“We sure will, John.”
The capcom at Woomera, in south-central Australia, radioed that my blood pressure was 126over 90. I replied that I still felt fine, with no vision problems and no nausea or vertigo from the head movements I made periodically.
The experiments continued. Over the next tracking station, on a tiny coral atoll called Canton Island, midway between Australia and Hawaii, I lifted the visor of my helmet and ate for the first time, squeezing some apple sauce from a toothpaste-like tube into my mouth to see if weightlessness interfered with swallowing. It didn’t.
It was all so new. An hour and fourteen minutes into the flight, I was approaching day again. I didn’t have time to reflect on the magnitude of my experience, only to record its components as I reeled off the readings and performed the tests. The capcom on Canton Island helped me put it in perspective after I reported seeing through the periscope “the brilliant blue horizon coming up behind me, approaching sunrise.”
“Roger, Friendship Seven. You are very lucky.”
“You’re right. Man, this is beautiful.”
The sun rose as quickly as it had set. Suddenly there it was, a brilliant red in my view through the periscope. It was blinding, and I added a dark filter to the clear lens so I could watch it. Suddenly I saw around the capsule a huge field of particles that looked like tiny yellow stars that seemed to travel with the capsule, but more slowly. There were thousands of them, like swirling fireflies. I talked into the cockpit recorder about this mysterious phenomenon as I flew out of range of Canton Island and into a dead zone before the station at Guaymas, Mexico, on the Gulf of California, picked me up. We thought we had foreseen everything, but this was entirely new. I tried to describe them again, but Guaymas seemed interested only in giving me the retro sequence time, the precise moment the capsule’s retro-rockets would have to be fired in case I had to come down after one orbit.
Changing film in the camera, I discovered a pitfall of weightlessness when I inadvertently batted a canister of film out of sight behind the instrument panel. I waited a few seconds for it to drop into view and then realised that it wouldn’t.
I was an hour and a half into the flight, and in range of the station at Point Arguello, California, where Wally Schirra was acting as capcom. I had just picked him up and was looking for a sight of land beneath the clouds when the capsule drifted out of yaw limits about twenty degrees to the right. One of the large thrusters kicked it back. It swung to the left until it triggered the opposite large thruster; which brought it back to the right again. I went to fly-by-wire and oriented the capsule manually.
The “fireflies” diminished in number as I flew east into brighter sunlight. I switched back to automatic attitude control. The capsule swung to the right again, and I switched back to manual. I picked up Al at the Cape and gave him my diagnosis. The one-
pound thruster to correct outward drift was out, so the drift continued until the five-pound thruster activated, and it pushed the capsule too far into left yaw, activating the larger thruster there. The thrusters were setting up a back-and-forth cycle that, if it persisted, would diminish their fuel supply and maybe jeopardize the mission.
“Roger, Seven, we concur. Recommending you remain fly-by-wire.”
“Roger. Remaining fly-by-wire.”
Al said that President Kennedy would be talking to me by way of a radio hookup, but it didn’t come through and Al asked for my detailed thirty-minute report instead. I reported at 1:36:54 that controlling the capsule manually was smooth and easy, and the fuses and switches were all normal. I paused to ask about the presidential hookup. “Are we in communication yet? Over.”
“Say again, Seven.”
“Roger. I’ll be out of communication fairly soon. I thought if the other call was in, I would stop the check. Over.”
“Not as yet. We’ll get you next time.”
“Roger. Continuing report.” I ran through conditions in the cabin and added, “Only really one unusual thing so far besides ASCS [the automatic attitude control] trouble were the little particles, luminous particles around the capsule, just thousands of them right at sunrise over the Pacific. Over.”
“Roger, Seven, we have all that. Looks like you’re in good shape. Remain on fly-by-wire for the moment.”
As the second orbit began, I thought I could see a long wake from a recovery ship in the Atlantic. One of the tracking stations was aboard the ship Rose Knot, off the West African coast at the equator. I moved into its range and reported a reversal of the thruster problem. Now I seemed to have no low right thrust in yaw, to correct leftward drift. I performed a set maneuver, turning the capsule 180 degrees in yaw so that I was flying facing forward. “I like this attitude very much, so you can see where you’re going,” I radioed. I also reported seeing a loose bolt floating inside the periscope.
I passed the two-hour mark of the flight over Africa, with the capsule back in its original attitude. The second sunset was as brilliant as the first, the light again departing in a band of rainbow colors that extended on each side of the sunfall. Over Zanzibar, my eyeballs still held their shape; I reported, “I have no problem reading the charts, no problem with astigmatism at all. I am having no trouble at all holding attitudes, either. I’m still on fly-by-wire.”
The Mammoth Book of Space Exploration and Disaster Page 11
