The Explosive Device Master Arm Switch

Our journey into the explosive devices subsystem takes us to Panel 8, a place of intricate mechanisms and immense importance. Our spotlight shines on the Explosive Device Arm Switch – the linchpin that commands the orchestra of lunar exploration. Clicking on this switch unveils the Explosive Device Master Arm Switch, a triple-pole double-throw switch with a two-position lever locking toggle mechanism. This is no ordinary switch; it’s the key that ignites the magic.

Unraveling the Mechanism

This formidable switch holds the power to arm the explosive devices subsystem, a crucial step that sets the stage for what’s to come. In the “On” position, it grants access to the activation of all lunar module explosive devices. How does it do this, you ask? By actuating redundant relays that channel power to the Explosive Device System (EDS) buses. Remember, EDS stands for Explosive Device System buses – this is the lifeline that fuels the explosive power within the lunar lander.

Apollo 11 Courtesy NASA

The Explosive Device Master Arm Switch: A True Powerhouse

Let’s dive into the schematics to visualize how this switch amplifies lunar exploration. When the Master Arm Switch is toggled to “On,” a surge of power courses through the system. Imagine it as the ignition sequence that breathes life into every function within the explosive devices subsystem. The magic unfolds: landing gear deployment, propellant tank pressurization, descent propellant venting, and much more. Each switch and indicator draws its power from this master switch, creating a symphony of activity.

The Crucial Role of the Arm Position

Now, here’s where the significance becomes truly remarkable. Without the Master Arm Switch in the “Arm” position, none of these functions can be activated. The landing gear will remain in stasis, the propellant tanks won’t pressurize, and the lunar dreams remain tethered to Earth’s realm. This single switch, in its unassuming demeanor, holds the fate of lunar exploration in its hands.

Understanding the “Why” Behind the “Boom”

But why the explosive devices? It’s a natural question, and we have an answer waiting for you in our General section. Discover the reasoning behind this bold utilization of explosive power, as we shed light on the role it plays in astronaut safety and lunar conquest.

As we wrap up this exhilarating exploration of the Explosive Device Arm Switch, let’s remember that this switch isn’t just a mundane mechanism; it’s a lifeline, a conduit to exploration, a key to the cosmos. So, share this journey with fellow space aficionados, for the universe beckons us to unveil its secrets, one explosive device at a time.

Stay curious, stay electrified, and keep reaching for the stars!

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The Explosive Devices System

Today, we embark on an electrifying odyssey to the heart of lunar exploration, where audacious astronauts defy celestial realms with the aid of invisible protectors. Join me as we unveil the enigma of the Explosive Devices System (EDS), an arena where raw power and meticulous precision propel humanity’s quest to touch the stars.

Imagine this: suspended in the lunar module, astronauts wield explosive devices as the keys to unlock vital equipment. The EDS plays conductor to this symphony, choreographing the dance of landing gear deployment, propellant tank pressurization, ascent and descent stage control, and even the ethereal venting of propellant tanks. These aren’t just cogs; they are lifelines that empower our cosmic pioneers.

Image Courtesy of NASA

Why Exploding Devices?

Now, naturally, a question emerges: why entrust the fate of these pivotal operations to explosive devices? The answer is profound and clear. As astronauts venture beyond the safety of Earth’s embrace, they are, in essence, on their own. Should a device falter, lives teeter on a precipice. Lunar aspirations, once radiant dreams, can swiftly cascade into treacherous nightmares.

Let’s dig into the machinery. Designed with an unyielding commitment to safety, the EDS follows the North Star of Fail-Safe principles. It leaves no room for coincidence; mechanical or electrical paths diverge only at the junction of mechanical actuation and explosive device switches. Every function is a high-stakes endeavor, recognizing the life-altering potential of its execution.

The Mechanics

Picture this: two parallel systems, A and B, where redundancy is paramount. The EDS operates as these twin arteries, pumping life into the mission’s heartbeat. Inside the humming explosive devices relay boxes A and B, each function is meticulously executed before the cosmic baton passes to the next act.

Landing gear deployment, akin to a celestial ballet, is poetry in detonation. Detonator cartridges take the stage, setting the lunar lander gently onto the moon’s surface. Each landing gear assembly enacts explosive precision, culminating in a gray crescendo that whispers victory.

And yet, there’s more. The EDS, with unwavering vigilance, manages the heartbeat of propulsion: propellant tank pressurization. It transforms fuel and oxidizer into cosmic courage, generating the force that propels our explorers towards the stars’ embrace.

Now, imagine the climax – stage separation. Explosive nuts and bolts unfurl the spacecraft’s wings, igniting a cosmic waltz. EDS, like a master conductor, guides the symphony of technology and human curiosity, ensuring the balance remains unbroken.

Dear readers, the narrative you hold is an ode to human brilliance and dreams that soar. It’s a tribute to those who push boundaries, boldly venturing into uncharted territories. The Explosive Devices System stands as both sentinel and enabler, guarding dreams and sculpting destinies.

Share this odyssey with kindred spirits, for the universe is vast, and the call of the stars compels us to rise higher, dream grander, and explore beyond.

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Assent Helium Isolation Switch

In this edition, we dive deeper into the lunar lander, focusing on Panel 8. It covers the Explosive Devices Subsystem. Specifically, we examine the Ascent Helium Isolation Switch, a critical component responsible for powering the ascent engine. This switch allows for isolation of defective helium tanks before the initial engine operation, ensuring a backup system is in place for added safety.

The Assent Helium Isolation Switch is a key feature. When you click on it, you’ll find options for the isolation valve for either Tank 1, 2, or both tanks. This redundancy ensures that, in case of a leak or malfunction in one tank, the other can be activated, providing a reliable backup solution. By analyzing the schematics, you can see how the switch functions and how it directs power to the selected tank or tanks, allowing the helium to flow into the system and power the ascent engine.

For a more detailed understanding, we delve even further into the ascent engine’s helium diagram. Here, you can observe both helium tanks and their corresponding isolation valves. Depending on the position of the Assent Helium Isolation Switch, power will be cut off to the selected tank. This preventing unwanted leaks or issues during crucial operations. By exploring the intricate workings of the lunar lander’s systems, you’ll gain a greater appreciation for the engineering brilliance behind space exploration. https://youtu.be/lXNGfWwRFMc

If you want to experience an interactive virtual reality exhibit on the Command Module, the Lunar Module, and the Moon’s surface, visit our Patreon page for more information. If you are joining today, you will get a week free! And you can cancel your subscription during the first week and pay nothing

What to use the Interactive Virtual Reality ISS Spacecraft Exhibit? Click here – https://www.patreon.com/SIVRMuseum . Thanks to NASA for the footage and the Smithsonian for the Images of the interior and Apollo Spacecraft.

New Mexico Museum of Space History Guide

Here is the Interactive Guide to the New Mexico Museum of Space History. These links go with the Apollo and Space Shuttle Artifacts that are on display. Clicking on the link takes you to the Original NASA information for the artifact. Although text has been optimized for digital use, it is the same information the astronauts and engineers used to find out what the component is and what it does.

In this guide, I have an interactive document to help you better understand the artifacts you are viewing. You will be able to decide how much information you want. By clicking on the link, or the Interactive Maps, you will be connected to the original information put out by NASA for the articact that has been optimized for display on smartphones and tablets.

There is also Interactive Virtual Reality Guides for a select group of the displays, specifically the Apollo, Space Shuttle, International Space Station, and Starliner. These allow you to move around the inside of the Capsule, pinch and zoom to see components, and in some cases, click on components to see what they are. There will also be some videos explinations on the components work in the guide.

Interactive Floor Maps – Click of the floor you are on. When the Interactive Floor Map comes up, click on the area of the map you are at to learn about the Artifact. 

First Floor Map

Third Floor Map

Forth Floor Map

Fifth Floor Map

Artifact List

Apollo Space Suit

Jacket Pants and Booties

Apollo Interior – Command Module

F-1 rocket engine

Food Crew Personal Equipment (apollo11guide.com)

Apollo fuel cell

Apollo primary guidance navigation and control system

Attitude Set Control Panel

Translation Control

DSKY – Interactive Image. Click on component to find out what it does

Replica space shuttle deck – Interactive Image. Click on component to find out what it does.

See what else I’m working on here. Links Page – Spacecraft Guide

Scouts BSA VR Astronauts on the ISS

Goal: Navigate the International Space Station to the Airlock and Cupola. 

•Working together, get to the Cupola. One person reads the map, the other person moves through the VR model. Once a Player has made it to their destination, they switch, and one person reads the Map, and the other person uses the VR headset to navigate to the Cupola.  •

•Background: Scouts will learn about the difficulties Astronauts have with navigating the International Space Station. Astronauts experience disorientation and vertigo in the ISS because there is no up and down. There is no true North either, so they must use Forward, Aft, Port, and Starboard.  

Question: How do you navigate with no reference to up or down, left or right, or true North?

1).Have Scouts scan barcode to bring up VR application. 

2.If the scout does not have a phone, Have STEM person at Table use their phone. Have everyone work in pairs. Groups of three are also fine for odd numbers.

3) Explain to them the challenge of navigating where there is no true North

•Show them

Forward, toward front of Spacecraft

Aft, toward Back of Spacecraft

Port, the Spacecrafts left ( Remember Port and Left have the same amount of letters)

Starboard, the Ship’s right 

•Show them the Map of the International Space Station. Show them all the parts

Columbus

Kibo –(JPL)

Harmony

Destiny

Unity

Tranquility

Cupola

Quest

Air Lock

4) Set your phone to use Google Cardboard. Scan QR Code below to see how to set up phone on Google Cardboard

Give one person the VR Goggles, (Google Cardboard.). Show them how to move in the VR environment by putting the dot on the target by moving everyone into the Columbia module.

5) Moving to the next component – •Show them how to move in the VR environment by putting the dot on the target by moving everyone into the Columbia module.

To move to next component, move your head to put small dot on Black Circle Target.

6) Once everyone is trained and has had a chance to move once in the Virtual Reality,

Give one person the VR Goggles, the other person the map.

If the person who has the map can bring up the ISS VR image on his phone without google cardboard and would like to use that too to see what the person with VR Goggles is looking at, that is fine too. 

7) Game

1.The person with the map guides the person with the VR Goggles from the Columbia Module to the Cupola Module.

2.When the person with the VR Goggles gets to the Cupola, show the STEM Person working the STEM table to verify they are at the Cupola. 

3.Have the Scouts discuss how to get around the inside of the ISS easier. 1.Look for ways NASA informs the astronauts what are the next components

Switch User

1.Have the Scouts switch their jobs. The new person with the map guides the person with the VR Goggles from the Cupola to the Air Lock with the same techniques as above.

2.Once the Scout is at the Air Lock, they are done.

3.If there is a third Person, have them use the VG Goggles to get to the Kibo Module. Discuss if they have an idea to make the getting around the inside of the ISS easier. Decide which other Scout will guide the Scouts with the VR Goggles.

Updating the Interactive Spacecraft Virtual Reality Apollo Exhibit

In May, we added a lot to the Apollo 11 Interactive Virtual Reality Exhibit, starting with weekly episodes. We are also using a new technology advancement to make the guide even easier to use. It makes the component the link itself so there is no globe obscure the VR image. And we will go over how to get your own version of the Interactive Virtual Reality Exhibit of the Apollo Spacecraft.

Lunar Module Suit Fan Caution Light

In this episode, we went over the Lunar Module Suit Caution Light describing what it does. Then we will go over how it works going over the expression ΔP, or difference in pressure. Finally, we visually explained the operation of the Lunar Module Suit Fan Caution Light using a new technique to Spacecraft Guide. We used the schematic to visually explain how it works and why it works the way it does. See https://youtu.be/QH6g7iGwWP4

Lunar Module Glycol Component Caution Light

In this episode, we describe the Lunar Module Glycol Component Caution Light. This light monitors the Glycol Pumps. It also goes over the newly added Video Description of how the environmental system works. See it at https://youtu.be/L03H3wa99QQ

Lunar Module Suit-Cabin ECS Partial CO2 Pressure Ihttps://youtu.be/VmA82tqbVWkndicator

In this episode, we describe the Lunar Module Suit / Cabin Partial Pressure Indicator. This is the instrument that Apollo 13 used to make sure the modified scrubber actually made breathable air, and we will show you how. It will go into what it measures and how, along with where it fits into the Environmental Control Subsystem. It also goes over the newly added Video Description of how the environmental system works. We also have a new technology advancement to make the guide even easier to use. If you stay to the end, we will show you how your feedback can help get you a membership with the Spacecraft Interactive Virtual Museum for a highly discounted rate, forever. Also, we show you the Apollo 16 Gala in London and the part we played in the celebration! See the episode at https://youtu.be/VmA82tqbVWk

Lunar Module ECS Pressure Indicator

In this episode, we go over the Lunar Module Suit / Cabin Pressure Indicator. It will go into what it measures and how, along with where it fits into the Environmental Control Subsystem. It also goes over the newly added Video Description of how the environmental system works. We also will go over how to get your own version of the Interactive Virtual Reality Exhibit of the Apollo Spacecraft. See the episode at https://youtu.be/0fSDCe239kc

What to use the Interactive Virtual Reality Apollo Spacecraft Exhibit? Click here – https://www.patreon.com/SIVRMuseum

Next e-Book, The Apollo Lunar Module Vehicle Familiarization Manual

Back in 1969, Grumman a manual to go with it’s revolutionary spacecraft, the Lunar Module. The mission of the manual was to be

“an aid for orientation and indoctrination purposes
only. It describes the LM mission, structure, subsystems,
and ground support equipment…”

For decades now, Apollo Enthusiasts have downloaded the free version of this manual that someone mimeographed in the 70’s, then put into a pdf sometime in the last decade. Quite recently, someone put out an e-Book of this manual, but it turned out to be that same mimeographed copy from the 70 but with information missing and/or smugged.

What we are going to do is take the information from that document, clean it up, put it in a more user-friendly font, and then put links to the reference pages and images to get the information you want IN ONE CLICK. Basically, we took the document that the Apollo Astronauts used, like Neil Armstrong and created an interactive 2.0 version.

You can get a sneak peak at the chapter on Crew Personal Equipment here. Take a look and stay tuned. This e-Book will be out before Christmas.

Go-To Sources

Apollo 13’s Lunar Module Pilot Fred Haise, a go-to source of mine, made an unusual statement on the Space Hipsters Facebook Live Event. He explained that he looked at Boeing’s Starliner telemetry data and said if there was a human on board, they could have monitored and made corrections to save the mission and dock with the International Space Station.  

I did some more research and found this from Darrell Etherington from Tech Crunch. “Bridenstine, (the Head of NASA,) also speculated that were NASA astronauts actually on board, they would “absolutely” have “been safe,” and that they probably could’ve assisted and overcome the automation error encountered via manual control to save the mission.”

I would argue the ground crew was unable to correct the orbit because there is too much data and too few humans to comprehend it all. We have no problem capturing data, we have a problem finding what is important within all this captured data. This is what I have spent the last 20 years working on and what you can use to find any piece of information on Spacecraft in one click, with the help of go-to sorces.

20 years ago I helped Airlines convert from paper to electronic information by writing a plan with steps to keep it up to data. One thing I did not count on is the amount of data that would be produced because of the ease of creating more information. I then pivoted from converting data to finding data. Years of testing with Airline Pilots helped me create documents with huge amounts of functionality.

With information literally doubling every year, I have used go-to sources as a way to find what Pilots need in one click and still be able to include new data. Because of this ability, I have turned e-books into hyper-efficient manuals based on images like the one below.

The testing with pilots was unbelievable, 9 times faster than current Aviation Information Systems. But what was really astonishing was when I tested it on space enthusiasts on the Apollo 11 Program. The same type of go-to sources model with the same format showed an unbelievable amount of use on the web site.

A web based prototype of the Apollo 11 Control Panels I created received a high number of hits and positive feedback on Facebook Apollo11Guide. Even on Twitter, @ShuttleGuide, not only did lots of likes, I received a like from Michael Collins. Frank Borman was asked if he liked the interactive poster I created and he told the EAA, “If I didn’t like it, I wouldn’t have Signed it!”

So if there is one take away you can learn from this article, it’s that search engines have so much data that doubles every year, that they cannot find what you need in a timely manner. If you want to get the correct information the first time every time, you need a one click strategy with go-to sources like the e-books below.

You are so far ahead of the industry that they won’t accept it

So I had a meeting with the person in charge of the world’s largest fleet of Boeing 757s and 767s. He gave me the best backhanded compliment for improving the Pound/Minute measure by a factor of 10. He smiled and told me “You are so far ahead of the industry that they won’t accept it.” I will share these secrets in this article.

He liked my idea of using images to increase the ability for pilots to absorb more information and links to get the correct answer the first time every time, but he thought right now his airline had bigger problems. I responded by saying my idea is just what they need because it could reduce dwell time on the ground by a factor of 9. (see Pilot Training Nine Times Faster – Think About That)

When I left his office, he did ask as an aside how my solution would work on an EICAS Message. I would like to think he liked my concept to reduce the Informational Footprint, but he had too many fires to put out. I did come with a concept for him in a week and sent him a video that was less than 30 seconds. I will show you on the Apollo 11 Interactive Virtual Exhibit how I did it and explain it in this article.

As I explain in previous articles, search engines are popularity contests for information. The more people who search on a topic and follow the path to the wrong answer, the more popular, or the better the confidence level, to the incorrect answer is ingrained into the internet.

The way to break out of this problem is to “instruct” the software to give the correct answer. This is done by finding the correct answer first and “teaching” the software so there is no question what the answer is. Think of being taught by your instructor as opposed to figuring it out for yourself. The best person in any skill is taught how to do it correctly, and that is what we need to do to the software.

Next, we must use the technology to make it quicker to find the correct answer the first time, every time. This is done using the linking and other abilities that the internet provides. This eliminates the need for a confidence level and, in turn, the need for search results. It literally makes Google obsolete. (See E-Manuals, The Disrupter of Google ?). This allows the internet to be 9 times faster than paper.

Next, we use images instead of words. Preliminary tests have shown this around 12 times faster. The reason why is human physiology. Our brains can grasp an image faster than symbols or words. This is the why the interactive poster was so well received. It is also why I was told “You are so far ahead of the industry that they won’t accept it.”

In the future, I will be creating and testing interactive virtual manual. I estimate it will be 20 times faster than paper and Google or any other search engine. This is not only because it is correct the first time, every time, but because it is one image that can cover the whole interior or exterior of an extraordinarily complex machine. I have created an interactive virtual manual for the Apollo 11 Command Module and you can see how easy it is to use at Apollo Spacecraft Intelligent Manual – Panoramic Edition ).

So that is nice, but why should the aerospace industry do this? It comes down to Money. According to DOT data, all costs for an aircraft on average comes to around $52 a minute. That includes crew, fuel, maintenance, and other variable costs. Now think of how it would reduce the lift per time, pound per minute calculation.

Example, last week we had a mechanical issue that cost us 40 minutes and at the end we had to come back to the gate. I would not have eliminated that issue, but I would have reduced it by a factor of 20. That would equate to 2 minutes instead of 40 minutes. That is a reduction in dwell time of 38 minutes.

If we take the time savings, 40 minus 2, that equates to 38 minutes. 38 times $52 comes to $1976. If those issues of dwell time happen each day, that comes to $721,240 a year. Not a bad savings.

The great thing is get to experiment. I let you see what I am working on at the World’s only Interactive Virtual Spacecraft Museum. Then I post the results of using the technology here. That’s why aerospace leader’s say “You are so far ahead of the industry that they won’t accept it.” But here you get to decide if I am too far ahead for you.