NASA Apollo project Space Suit(A7LB PGA)
- temperature endure to : from -290 to +310 Fahrenheit (from -179 to +154 Celsius)
- inner pressure : 3.70 - 3.90 pound / square inch
- running time : 7 hours(continuously), 160 hours(total)
- weight : approximately 180 pound (all equipments include PLSS)
- manufacturer : Space suits : International Latex Corp.(ILC DOVER Inc. at present) Back Pack (PLSS) : Hamilton Standard Division of United Aircraft Corp., Windsor Locks, Connecticut
We must need special made "Space Suit" to protect mankind from hard temperature change, vacuum, micrometeoroid in space. On the moon, it becomes 120 degree Celsius (250 Fahrenheit) at daytime, and -157 degree (-250) at nighttime. And micrometeoroid pours in 102,400km/h(64,000mph), exposed in harmful ultraviolet rays from the sun. So, we can not live in space for only few seconds without Space Suits.
Space suit in Mercury project, it was improved product from pressure suit of U.S. Navy high altitude jet fighter. This was not complete airtight suit. This was back up for spacecraft's pressurization. In Gemini project, joint mechanism was developed for bend arms and legs in pressurized environment by U.S.Airforce's research. It had a combination of a pressure bladder and a link-net restraint layer that made the whole suit flexible when pressureized. In Apollo project, it must have to offer protection from jagged rocks and the searing heat of the lunar day. And had to be flexible enough to permit gathering samples from the moon surface.
The space suit used for Apollo project was called A7L / A7LB. The head character 'A' means Apollo project. Second character '7' means model number. Third 'L' means manufacturer. In Apollo project, from earlier A1C to last A7LB, 15 types of space suits were developed. Type A6L suit was used at Apollo One, but because of fire, fireproof A7L suit was developed and used from Apollo 7. Then after Apollo 15 (J mission), more improved A7LB suit was used. This suit was used even SkyLab, ASTP projects. After that, A8L type was developed but not used.
In Apollo project, all space suits were fully tailor-made, made for each astronauts, used it once and then throw. And 15 suits were made in each mission. One for actually misson, one for training, one for spare for each primary crew, so 3 x 3 = 9 suits. Then for each back-up crew, one for actually misson, one for training, so 2 x 3 = 6 suits. So, they become 15 suits all together.
Against that, space suits for space shuttle are reuseable because of functionallity of changing size by replacing each parts. At NASA Johnson Space Center in Houston, many parts which can combine about 50 suits are stocked now.
Many company are making each parts, and it's structure will be change by each misson, so it's very difficult that calculate price of one space suit. One day, some news media reported that it's cost was about 2 million dollers. It becomes more than tat when it used at once like Apollo.
Inner space suit was made by 20 to 21 layered special material developed by Du Pont company. These are type of nylons and new material called Kapton film. And the most outside was covered by Teflon coated glass fiber beta cloth. For reflect sun heat and keep comfortable temperature, suit was colored as white. Form Apollo 13 to 17, captain wore red belt on elbows and knees.
Apollo space suit was formally called 'Pressure Garment Assembly (PGA)'. And the full set of suit include life-support system was called 'Extravehicular Mobility Units (EMU)'. 100 percent oxygen was provided in this PGA.
In Apollo project, PGA was used in two different form. One is 'Intravehicular:IV' form called 'CMP A7LB PGA'. Another is 'Extravehicular:EV', on the moon or out of spacecraft, called 'EV A7LB PGA'. CMP A7LB PGA was worn by command module pilot(CMP). EV A7LB PGA was worn by commander(CMD) and lunar module pilot(LMP) on the moon surface. And in SkyLab project, improvement model of EV A7LB PGA was used.
In the knee, wrist, shoulder, elbow, ankle, thigh region of CMP A7LB PGA, special made joints were integrated for bend easily in pressurized circumstances. And for EV A7LB PGA, in addition to these, neck and waist joints were integrated. The center of the back, from neck to thigh, restraint and pressure-sealing zippers was provided on CMP A7LB PGA. Astronaut donned space suit from here. EV A7LB PGA has entrance zippers extend from the left side of the waist, around the back to the right side of the waist, and diagonally up to the right chest area of the suit. Astronaut oneself can handling these zippers, but normally colleague operate this.
Intravehicular suits include following units.
- fecal containment subsystem
- constant wear garment : underclothes
- biomedical belt : sensor to collect biomedical informations
- urine collection transfer assembly : urine collecting unit
- torso limb suit assembly(TLSA) : body of space suit
- integrated thermal micrometeoroid garment(ITMG) : pressure skin
- pressure helmet : cover astronaut's head
- pressure glove : cover astronaut's hand
- communications carrier : make comminication with Houston
Extravehicular Mobility Units
Extravehicular Mobility Units was composed by remove constant wear garment from Intravehicular suits and add following 5 units.
- liquid-cooling garment : underclothes cooled by liquid
- lunar extravehicular visor assembly(LEVA) : wear on the pressure helmet
- lunar extravehicular glove assembly : wear on the pressure glove
- lunar overshoe : wear on the boots of TLSA
- cover which fits over umbilical connections
Torso and Limb Suit Assembly (TLSA)
The skin of space suit was layered from this TLSA and outer ITMG. TLSA is three layered, and covers all of body except head and hand. And connected with helmet and gloves. The body part of TLSA was custom made for each astronaut. The torso part was selected from some fixed size unit. In this TLSA, oxygen duct and electrical cables for communication were integrate. A pressure gauge to measure pressure in the suit is installed on the right wrist. And an exhaust valve for exhaust oxygen when the pressure go over 5.5psi is installed on the left wrist.
Integrated Thermal Micrometeoroid Garment (ITMG)
This outer ITMG is for insulate heat and micrometeoroid, and connected to extravehicular visor, lunar overshoe. This is made by seven layered aluminized Kapton film, six layered Beta Marquisette, two layered Neoprene-coated nylon Ripstop, sandwiched between beta cloth. The knees, elbows and shoulders were protected by Chromel-R. On the left upper arm, a pocket for pens and penlights is stitched. And on the right upper arm, a pocket for sunglasses, on the right upper thigh, there is a utility pocket. On both legs, strap on pockets for data-list (left) and check-list, scissors(right) are stitched. On the back, for avoid wear with PLSS, Teflon patch was stitched.
|electrical,biomedical and communication connector
|double water connector
This helmet was made of polycarbonate (plastic), and connected to TLSA by aluminum pressure-sealing neckring. This helmet was fixed to spacesuit, and do not move while astronaut moves his head. There is a feed port on the left side to connect air valve. A vent pad was contained on the back.
Lunar extravehicular visor assembly(LEVA)
This visor assembly containes two visors, two side eyeshades, and a center eyeshade. The outer sun visor employs a gold coating to reflect sun heat and light. And the inner protective visor is transparency, and coated for obstruct running heat away. These visors and shades are adjustable.
Lunar overshoe was made from the same material with ITMG. Metal-woven fabric or Chromel-R forms the outer shell of the boots to resist high lunar surface temperatures. Then silicone rubber sole was consisted. This boots are slip-on assemblies put on over the ITMG.
pressure glove & extravehicular glove
Two type of gloves, 'Intravehicular:IV' and 'Extravehicular:EV' are provided for each PGA. This glove were formed to fit each crewman's hand. Pressure glove is made from one layer rubber. and outer gauntlet and palm restraint system is added out of this.
Extravehicular glove was worn over the pressure glove. This is covered by Metal-woven fabric or Chromel-R, and the fingertips are fitted with silicone rubber caps. This outer glove extends over the pressure glove - TLSA juncture.
PLSS : back pack
A life-support system for APOLLO is approximately 26kg in weight. and called Apollo Portable Life Support System (PLSS). Oxygen was supply from this System then keep astronaut's life for about seven hours continuously. 1.05 pound oxygen was housed in 46.6 square ibch tank with 900 psi. Oxygen was supply from Inlet gas connectors to helmet directly with temperature of 7.2 - 10 degree Celsius (45 - 50 degree Fahrenheit). And directed through ducts to the exhaust gas connectors with temperature of 26.6 - 29.4 degree Celsius (80 - 85 degree Fahrenheit). The impurities in the exhaust gas are removed by PLSS, then used for breathe again. It passes through a canister containing deactivated charcoal and lithium hydroxide, which absorbs the carbon dioxide and purifies the gas. Liquid Cooling Garment (LCG) is also donned under the space suit. It consists of a nylon Spandex material which supports a network of Tygon tubing through which water from the PLSS. Water or coolant is put through from PLSS, absorb body temperature, refrigerated in PLSS again. Two 16.8 volt battery provided electrical power. These battery were 4 pound weight each. The upper part of PLSS houses emergency oxygen tank and communication unit. Astronaut can extend life time for 30 minutes with this emergency oxygen tank. A life-support system used by SkyLab project was called Skylab Astronaut Life Support Assembly (ALSA).
REMOTE CONTROL UNIT(RCU)
Astronaut wore this REMOTE CONTROL UNIT on his chest for control PLSS, communication system, electric power system. All equipments include PLSS were controled by this RCU.
Omega Speedmaster Professional is the only watch that went to the moon as NASA official equipment. In 1965 at Houston, to find a watch that can be used in the space, officials of the NASA Johnson Space Center has purchased a chronograph watch of some brands in a jewelry store Corrigan's. Temperature, humidity, acceleration, these watches were exposed to very harsh test. After completed all the tests, only Omega Speedmaster Professional launched in 1957 did not lose the function of the watch to the end. Even after the Apollo program has been completed, adopted in the official watch of the Space Shuttle Program, it has continued to play an active part in the space today. It is a NASA official equipment only we can buy at the store.
In addition, in consideration for use in zero gravity, 'PROFESSIONAL' wind-up model were chosen for astronauts, instead of self-winding 'AUTOMATIC'.
OMEGA SPEEDMASTER PROFESSIONAL MODEL 3570.50
The latest model of normal PROFESSIONAL. Movement is different, but this is the series used in the Apollo program. For safe even broken in harsh environments, the glass is made of Plexiglas (A kind of plastic), but is vulnerable to scratches. Design is refined many times, the details are different from the days of the Apollo program.
OMEGA SPEEDMASTER PROFESSIONAL MODEL 3573.50
Special model of PROFESSIONAL. The back cover is transparency for visible inside mechanism. The glass is made of Sapphire glass, so is strong in the wound.
In the zero-gravity environment, a normal ballpoint pen can not be used. Fisher's proprietary "Space pen", it has pressurized ink cartridge with 35psi nitrogen and tungsten carbide pen tip, can write under the environment of zero gravity, water, 12,500 feet (3800m) of altitudes, ?30 to 250 °F (?35 to 120 °C) temperatures range, in any angle. Although NASA was using a mechanical pencil in the space, considering the risk when floating broken pen tip, they developed a pen that can be used in space with considerable expense, but not succeeded. In 1965, Mr. Paul C. Fisher : Founder of Fisher's, recommended this pen to NASA, they decided to adopt it in the Apollo program. It is said that in 1967, NASA has purchased 400 pens for $6 a piece. In addition, Space pen that was used in the Apollo program is a model called the AG7 "Astronaut pen".
Fisher Space Original Astronaut Space Pen
Chrome Plated Astronaut Space Pen. This is the original Fisher Space Pen that was used on the Apollo 7 space mission in 1968 after 2 years of testing by NASA and has been used on all manned space flights since then. The design and construction of this pen has not changed in 36 years. The pen you buy today is exactly the same as the one taken to the moon in 1969. It is a heavy pen and the weight rests reassuringly in your hand as you write. The AG7 is made from solid brass with an extremely hard Chrome plating. It has a very positive and substantial feeling click mechanism. You press down on the top to extend the refill and press the side button to retract the refill. It's special design assures you that you'll always retract the point before you slide it in your pocket. It's constructed of all brass and steel components of the highest quality and is made in the USA. All Astronaut Pens are attractively packaged in heavy duty gift boxs with flock lining and come with a pamphlet describing the history of the Fisher Space Pen. Used on all NASA Apollo and Shuttle missions, ISS International Space Station, Russian Soyuz and MIR space flights, French ARIANE Space Program, Everest North Face Ski Expedition. This item come in a original box from the manufacturer.
Space suit in movies
Space suits in movies are all imitation for film, not rent from NASA. In the movie "APOLLO 13", space suit was made by SPACE WORKS. And in "FROM THE EARTH TO THE MOON", it was made by GLOBAL EFFECTS INC.
All space suit pictures on this web page are taken from action figure NASA APOLLO ASTRONAUT 'BUCK' made by Dragon Models. Look at Apollo scale models page for more informations.
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