How small can you make a nuclear weapon?

 

YouTube video by Curious Droid

Comment:

He mentions the objections that would arise if such were actually proposed for use in spacecraft propulsion. The advantages would be in increasing ISP, which determines the amount of propellant mass needed. A nuclear device may have an ISP hundreds of times greater than the best chemical engines.

There was a proposal to do atomic propulsion back in the fifties, but the idea is moot since it is outlawed by international treaty.

Nevertheless, it is an intriguing idea, which forms the basis of the Jumbo sized Aldrin Cycler. You could transport a massive structure out there using atomic propulsion. Once out there in its orbit around Mars and Earth, it could be used to transport lots of people and cargo to the Red Planet.

Continuation of the Aldrin Cycler series of posts

8/28/25:

Not too much more to say on this, but I'm still playing around with the numbers.  You may be able to transport a much smaller number of people, and with great protection.  How many people?  I'm thinking at least 3k per trip. 

How do you get 1 million on Mars, then?  You'd have to find another way.  It will likely take longer than 20 years.  I think that is pretty much baked into the cake.

If you do it Elon Musk's way, you're going to get a lot of dead people.  That's why I ran this thought experiment.  There's no protection on the Starship.  No artificial gravity.  Those folks are going to be in rough shape when they get there.  That's assuming that they make it.

8/26/25, 10:10 AM:

Began on the other blog, but should've been here. Just one thing to mention is that denser materials give better radiation protection, but there doesn't appear to be much literature available about HOW much better. Generally speaking, lead is preferred. But lead doesn't have the structural strength you'd like, and it is toxic. That's all for now.

3:30 PM:

I haven't run the numbers, but lead might need less mass in order to shield half the energy of gamma rays as opposed to iron.

This gave me an idea.  It turns out that you can synthesize gold, which would be a better shield than lead.  If the same pattern held, then less gold mass would be needed than lead, as less lead mass is needed than iron.

If you synthesized the gold, you could plate it on the outside of the iron, which would be needed for structural strength.  The synthesized gold would be radioactive, though.  What form of radioactivity would need to be determined.  For example, does it emit, alpha, beta, or gamma radiation?  That would be important in terms of shielding.  Gold may decay to normal gold eventually, and could be harvested.

At the moment, this is just an idea.

A Mars Colonization Strategy

 

Count me as a skeptic of Elon Musk's plans to colonize Mars. However, his Starship could be used as part of a system that I will present here. The proposed system will consist of several elements. These elements could be lifted into space on an economical basis by Musk's Starship. The Starship will be best used for such projects, as it is not suitable for long term space habitation. The Starship could be used for lifting large amounts of cargo from Earth for a reasonable cost. That is its most advantageous use.

For getting to Mars, an Aldrin Cycler could be employed to transit the distance. The cycler system will consist of two parts. One part will transit between Earth and Mars, and the other part will make the return transit. Since the Delta-V budget for accessing the cyclers will be large, the Starship could be used for the transit between the respective planets and their respective cyclers.

 

The cyclers will be able to hold massive amounts of cargo and people. Consequently, it must be very large so as to be able to handle this function. The Starships could be employed to lift all the components necessary for its construction. Since these cyclers will be very massive, there will need to be a very strong propulsive kick to get them into proper position in their cycler orbits. How to do this?

 

Once the cyclers are constructed, I suggest an Orion nuclear propulsion tug that will push the cyclers into their appropriate orbits between the respective planets. The Orion will have the advantage of giving large mass the necessary Delta-V in order to perform their tasks.

 

There is little doubt that the Orion concept can work. It isn't new, as the ideas have been tested with conventional explosives. The last testing will have to take place in space. Once all the requirements are met, and the technology has been developed, the Orion can do the job. Once in place, the cyclers will need only small amounts of fuel for course corrections, and can serve for many years.

At the Mars end, JP Aerospace's technology could come into play. JP Aerospace is developing an Airship to Orbit concept. Such a concept would be much easier and more elegant on Mars. The Delta-V to Orbit for the Airship on Mars would be much reduced, and there's little doubt that it could be feasible on Mars. His ships could land on top of Olympus Mons. Olympus Mons could be jumping off spot to transit to any place on the Martian surface, while using his Airships.

 

Large amounts of Cargo and people could be transited in this manner, and that would be all of the transportation needed. The rest of the tech needed could be transited via a Starship to Cyclers system. Thus, all of the machines and people could be tranported this way, and the Mars colony could beome a reality.

 

What about the long transit times? The cyclers could be optimized for that. The Orion propulsion system could provide the necessary thrust to get large objects into position. A conventional fuel system would be too cumbersome. The use of atomic bombs as propulsion would yield ISP's of nearly a million. Therefore, the Orion propulsion method could simplify the logistics of moving large stations into an Aldrin Cycler orbit between the planets.

 

The cyclers themselves could be rotated, which could give artifical gravity to its traveler guests. It could be shielded from cosmic radiation so that the travelers wouldn't be harmed during their long transit times. They will arrive at Mars in optimal physical condition.

Of course, Mars could be configured to be safe for human habitation as well. What will be needed is a transport system to move the necessary mass into place. The machines could do the rest.

 

Who would do this? Elon Musk? He wants to use Starships, but those are only a small part of a viable system. His current plan is too risky. It is incomplete. It is not likely that simply economy of scale can still achieve everything that needs to be done.

 

But it could be a good start.

 

Asking LEO AI about the space station as Aldrin cycler:

 

Could you produce a graphic of a large space station which rotates in order to give artificial gravity to its inhabitants?

 

 

LEO's Answer: 

I apologize, but as an AI language model, I do not have the capability to generate or produce images. My primary function is to process and respond to text-based inputs. If you would like to create a graphic of a rotating space station that provides artificial gravity, I would suggest using a graphic design tool or software, or commissioning an artist to create the image for you.

 

However, I can provide a textual description of what such a rotating space station might look like:

 

The space station would be a large, cylindrical structure, spinning around a central axis to generate artificial gravity through centrifugal force. The cylinder would be large enough to accommodate living quarters, research facilities, and other necessary infrastructure for the inhabitants.

 

The exterior of the station would likely be made of a durable, lightweight material, such as aluminum or composite materials, to minimize the weight and maximize the efficiency of the rotation. The interior of the cylinder would be divided into different sections, with living quarters, recreational areas, and research labs arranged around the circumference.

 

The rotation of the station would create a gravitational force that would be felt by the inhabitants, simulating the effects of gravity on Earth. This would allow the inhabitants to live and work in a more Earth-like environment, reducing the negative health effects associated with long-term exposure to microgravity.

 

The station might also feature windows or viewports along the outer walls, allowing the inhabitants to observe the Earth, the Moon, and other celestial bodies as the station rotates. This could provide a unique and awe-inspiring perspective on the universe.

 

Overall, the rotating space station would be a remarkable engineering feat, providing a sustainable and comfortable living environment for its inhabitants in the vastness of space.

 

Never mind, this will do! 

 

Rock 'n Roll done rocked and rolled

7/24/25:

 

Just for grins, even though the scooter didn't need a charge, it got one anyway. For comparison purposes, the fully charged battery clocks in at 41.7 volts. Before the solar powered charge, it was under 34 volts. It works on 36 volts, btw.

 

The indicator on the display showed 20% discharge, but it's probably more than that. Distance so far is about 2 miles. Not as impressive as it appeared to be at first. The display is not going to be much use, I'm afraid.

 

7/23/25:

 

Rain was in the forecast yesterday, so no go on a trip. Today, I ran it around the place a bit. Still worried more about ME than the machine. This may take awhile to get in enough shape to really try it out like I want to. Cut it short because of fatigue.

 

7/20/25:

 

The scooter is now prepared for a real trip, but I am not... I want to practice with it some more, but I woke up with a sore foot. I will take it easy today, and hopefully the foot will stop bothering me.

 

I'm not as sure about its range as I should be. The last thing I want is for this thing to run out of juice before I get back. I may have decided to get an e-bike instead. It would've cost more, but I would have the option to use muscle power to get back to the comforts of home. Water under the bridge, as it is said.

 

7/18/25:

 

Things get disorganized around here sometimes. Focus gets lost, and things get started and not finished. Well, not this time. I re-read the manual, and I'm getting more familiar with the controls. Therefore, there's something to report. Most likely, I haven't used 20% of the battery, as earlier indicated. The readings "bounced" back up. It's a 36 volt set up, and there's a reading that shows 38.4 volts. My guess is that this is another way to read a discharged state.

 

The trip odometer reverts to zero on every new trip. There's a history odometer too. But you have to jump through a few hoops to find it. It doesn't show but 1 mile. I know I've done more, but since it doesn't show tenths of a mile, it could be close to 2.0 miles. Once it exceeds that, it will show 2 miles and no more. Still practicing with it. Until I feel a bit more confident with it, the trips will be short.

 

7/15/25; 1:47 PM:

 

Yesterday was rainy, so I stayed inside. Today is sunny and dry, so it was time for further tests. I made some adjustments to my ramp and to the scooter, and gave it another whirl.

 

This trip was longer. A total of 1.4 miles. It still has a good charge on it, according to the indicator. Very impressive. My adjustment made the speedometer too hard to see. Therefore, there's no speed to report. Seems like I got another comment from the locals. We met at an intersection at the same time, and he said, "go ahead, Bart". I got a kick out that, so I went on ahead.

 

It looks like it has discharged about 20% over about 2 miles on that last full charge. It may extrapolate out to 10 miles on a charge, which is a lot better than anticipated. It's already beyond my expectations as is.

 

7:38 PM; continued:

 

Some more adjustments were on tap, and now these are done. More adjustments to the ramp, but these are not yet done.

 

There's a chance I take her out for another spin tomorrow.

 

7/13/25:

 

That was so much fun I forgot to post about it. The ramp was completed, and off into the breeze did I go with my new scooter. I got a compliment on it as I breezed on by one house.

The seat may be hard on my achy breaky butt, but I may be able to tolerate it. I'm getting a little worried about a spill. I have enough trouble standing up. If I fall down, I may not be able to get back up. That would not be good.

Don't have any safety equipment. Shoot, I used to ride a bicycle all over the danged place, and never wore a helmet, but I did wear clothes.

These days, they may give you some shit about anything you do. Besides, it's probably good safety practice to have a helmet and guards for the elbows and knees.

The thing says it will go over 15 mph. That's faster than the electric scooter I had in the fairly recent past. When I rode that thing in Houston, there was a lady who went out of her way to laugh at me. I don't give a hoop. If I did, would I have bought another one of these things. I'm worried about other things.

Focus Fusion video

 

7/18/25:

 

There's another report out, and they're still making progress. It's a slow slog through all the problems and difficulties. If it was easy, anybody could do it.

 

Investing is easy, even a caveman can do it. Doesn't cost much, and the rewards could be revolutionary. It's a good way to put your money where your mouth is, if you believe in climate change. Even if you don't, as I most certainly DO NOT, it is still a good investment play. This thing will be worth some serious money if they're successful. Maybe the so-called greenie folks have something against making money.

I own a share.  It split so I really own two.  See, I made money already.

 

6/29/25:

Crazy idea has a certain charm to it

7/17/25:

 

My hometown is Houston, and there's an inland port that goes all the way into downtown. Or it once did. Back around the time the Panama Canal opened, the Houston Ship Channel was dredged out to within a few miles of downtown.

I recall seeing an old picture of a ship at dock in downtown Houston, with visible landmarks like the Harris County Courthouse in evidence. The pic I recall was about the time the Canal opened. If you go down to Allen's Landing, you can see where the ships tied up. It looks really different down there.

 

The Ship Channel is one of those interesting ideas that is somewhat like the outback sea idea. How so? You could use tides and such to keep it filled, and to replenish the water a bit so that it won't get so alkaline.

The idea is to dredge a very large pool, in which the tides can overflow, but can only channel back out through a narrow opening. In this way, large amounts of water can be impounded behind a type of dam that can be overflowed during high tide, and re-emerge during low tides, with the water rushing out through the channel.

 

Fresh water can be captured in dams as well in order to provide additional flushing. This is kind of the way the Houston Ship Channel Works. Houston is 50 feet above sea level. How do you get ships up stream, except some way to impound a lot of water to keep them afloat?

The outback sea will require a lot more water than the Houston Ship Channel. You would definitely need a LOT.

 

There are flood control dams in Houston. It rains a lot in Houston, and so I am to understand, does the Australian northern shores. Rainfall will help provide water, but there may need to be much, much more to make a really large lake so far inland.

 

7/15/25:

There's at least a couple videos like this one on the subject of the inland sea down under. Now they've got me thinking about it!

 

What if you could use the natural tidal action and siphoning effect to move massive amounts of water for long distances?

Here's the other video:

Can you ride your motor scooter, Billy Boy, Billy Boy

7/12/25:

 

Making the ramp now. It's almost ready to be tested. If that test works, then I can get the scooter outside and try it out. I tried it inside a bit. Everything seems to be working, and I'm nearly ready to ROCK n' ROLL!

 

But do I ever get tired easy. Maybe if I am lucky, I can rebuild myself while I'm doing this. This is embarrassing.

 

By the way, did I mention that I found the missing bolt? However, the other wire basket between the seat and the handlebars, and is actually large enough to carry some cargo, is IN THE WAY. So, I had to take it off. The seat feels okay for now, but I'm not bouncing up and down on a bumpy road yet. We'll see.

 

7/11/25:

 

The scooter came, I saw, but it did not conquer me. Not yet, anyway. There was some assembly required--for the scooter, that is. The cursed thing arrived late afternoon. I got the bright idea to take it out of the box while outside in the sun. By the time I got it out of the box, I knew I was in for a battle.

 

I fought this thing for the rest of the day, and retired for the evening in a very tired state. In theory, the assembly should have been easy. Among the issues were that the handle bars "quick disconnect" mechanism would not go on properly. Fortunately, this feature is not necessary. The status of the assembly was mostly finished by bedtime. But I was still in the fight.

 

First thing this morning, the battle raged on. The parts of this scooter have a very annoying tendency to want to fall to the floor. I have a strong tendency not to want to bend over and pick things up off the friggin' floor all the time. So I battled this thing for another hour before finishing up the assembly. That is, what I could do of it. A part went missing when it hit the floor. I spent another hour looking for it with no luck.

 

The original idea was to build it outside because I wanted to store it in the van. But it is too hot to store it outside, says the manual. So I have to keep it in-friggin'-side. So that is the current state of this adventure. The question being, how to I store this thing inside, and move it outside where it can be useful when I want it to be? I will build a ramp. There's some stairs to traverse in order to get it back down to ground level.

 

More assembly required. I'm getting too old for this shit.

 

7/10/25:

 

Amazon and UPS needs to get their heads wired up to their asses. They are giving conflicting information. It's not a problem so far. We'll see.

 

7/9/25:

 

The scooter is still on its way. Not due for a couple more days.

 

I tested the battery by using it to power the weed eater. The weed eater pulls about 700-800 watts estimated. It will drain a battery of this type in a relatively short time. It will run a dehumidifier for 3 hours continuous if it is in as good a shape as last year. It has seen little use since I stopped that experiment. Now there's this experiment.

 

There's always something, said Rose Ann Rosanna Dana.

 

7/8/25:

 

The repairs are complete, but there may be some tweaking ahead. Still in testing phase, but it appears to be working as intended.

 

Still waiting on the scooter to arrive.

 

7/7/25:

 

The solar panel system has been acting up. When I moved the trailer recently, I may have pulled a wire loose. I forgot to unplug everything, and while pulling the trailer, I notice something was being dragged along behind me. Oopsie.

 

It's been a slog to figure out what got messed up. It's charging the battery again, so that's good. I want the switches to shut it off and on to work, but these aren't cooperating at the moment. No biggie. I'll figure it out.

 

7/5/25:

 

Awaiting my moto scooter, and it is no ring-tail tooter. (Ref: Slick Willy Update of the Rush Limbaugh show dating back to 1992's election campaign ) Getting my stuff ready, as preparations are needed.

 

The following video is a little closer to the update version, but it isn't quite there. I can't find it on YouTube.

 

 

 

 

07/03/2025:

 

Got an idea about buying a mobility scooter. The one that would seem most handy would cost over $3k, and can be obtained on Amazon.

 

It is electric, and would have a 30 mile range, or so it says.

 

Having experimented with an electric scooter before, the range would seem be inflated. It all depends upon battery capacity. This one has a 48 V, 20 AH electrical setup. That's about 1 Kwh. If it is anything like autos, it may get 4 miles.

 

Even so, it would be sufficient for ample mobility.

 

The price is high, but not beyond me. What about a golf cart?

 

07/04/2025:

 

Here's what I did: I got an electric scooter. It is pretty much the same thing I had before, so it won't cost much, and it can't do all that much, but it can do a few things ( I hope ).

 

Back in 2003, I bought one for $150. It is now $450 on Amazon. Now that is what I call "progress". Free delivery! Like wow, man.

 

I'll use my solar panels to provide electricity for charging the thing. Maybe this idea will actually work. Most of my ideas don't work worth a sheet, main.

 

 

Interesting concept to use nuclear pulse propulsion

It was studied for many years, and then abandoned after the adoption of the nuclear test ban treaty in 1963.

 

The idea is discussed in the following video.

Not all of the technical challenges could be overcome at that time. The sticking point seemed to be with the pusher plate. There wasn't any way to model it, so that it could be developed. In order to do the tests, real nuclear bombs would have to be used. Such a testing procedure was deemed to be infeasible. After the treaty, it became illegal.

 

A question: What if it were to be developed in deep space? It couldn't do much harm way out there. If such could be developed successfully, would it not be better to send large numbers of people to another planet, like Mars, using a few bombs? Such a system could be used instead of the Starship. Indeed, the Starship could be used to send up the large amount of mass needed to construct such an ark, and send it on its way.

Ingenious Construction Tech

 

Focus Fusion Update

Disclosure:  I own (1) share. 

Aneutronic fusion would be a game-changer.

Quote:

Imagine the world in which power is cheap, pollution is gone and people are enjoying affordable housing, locally produced foods, and cheap healthcare. With fusion energy, everything can change for the better – in a heartbeat.

A 2-cycle ICE hybrid

5/27/25:

 

You could make them out of superwood! 80% lighter than steel, and moldable into shapes fitting for an automobile, superwood could make the cars that much more efficient.

 

5/25/25:

 

The engine described on the main blog may be useful in several ways. It is a powerful engine in a small package. Therefore, it would not need a massive frame to hold it. It could be optimized to make just enough power to keep the batteries charged in a hybrid engine.

 

The engine in the video was about half a liter, with a power output of 200 hp. You could get away with a much smaller engine. Let's say 1/2 the size and output. That would mean a 250 cc engine with 100 hp. That 100 hp engine could power a generator, which in turn, would power an electric engine.

You wouldn't have to run it all the time. Just long enough to charge the batteries. With the new batteries coming out soon, you wouldn't need much weight on them either. They could also be charged an indefinite number of times, since they would actually operate more like a capacitor than a battery.

The engine would be quite versatile, since it could run on a variety of fuels. The ones mentioned in the video include hydrogen. Perhaps it could run on ammonia? In that case, if ammonia could be synthesized economically, it could replace carbon based fuels. Not that I would think that important, but some people believe in the global warming theory.

Anyway, I would speculate that a super efficient ICE hybrid may be feasible in the near future. Question is, will it ever be built?

Potentially revolutionary propulsion system.

 

Seems like I've heard about this design before somewhere. Once you acquire enough speed, the sky is the limit. Imagine a single stage to orbit aircraft that can take off from a runway. It would be air breathing, which could remove the need to carry oxygen. Oxygen could represent the lion's share of the mass needed to get to orbit.

Venus Aerospace Completes Historic U.S. Hypersonic Engine Flight Test https://t.co/ev3zNEcllQ --- Uses a rotating detonation ramjet engine concept. It is claimed to be scalable. Goal is to produce aircraft that can sustain Mach 4. Doesn't require rocket engine boosts.

— BootsandOil (@BootsandO6892) May 20, 2025

JP Aerospace tests their home-made submarine

 

The video below was published just prior to a test of the sub...

... and afterwards a post on the blog about it. Not many details, but those may be forthcoming.

Installation of Fedora Linux distro

5/16/25, 6:34 PM::

 

I'm going to suspend this for awhile. Reason being that there's not good enough reason to add yet another distro to the collection. If Mint craps out again, maybe...

 

Just added a restore version on Mint, so if it does crap out, then at least I can try a restore option. Didn't have that the first go round.

 

2:39 PM:

 

Note to self: Installing Fedora via Live Environment installation disk will not work. Insufficient disk space. Well, duh.

 

So I had to do a real install of Mint, which is always an adventure. As of this writing, Mint is now re-installed. What happened to the first install?

 

Just say it got discombobulated and there was no backup or restore capabilitity. So I did without it for awhile until now, when I decided I might need it again. Trouble is, I forgot how I got the thing installed the first time. Always a fun time to rediscover how all of this was a pain in the arse.

 

Maybe I can install Fedora now. This post is made in the Mint environment, so that's poof proof. The last time I tried this, I was in the mint install environment, and google yanked the post.

 

5/15/25,6:50 PM:

Fedora may be simpler, but getting Linux Mint installed again is a bit of a tussle. Spent the better part of today working on this.

Why did I ever start bothering with computers???? Seemed like a good idea at the time.

This is a video which shows how to install the Fedora Linux distro. I've used this YouTube Channel (AgileDevArt) for videos on how to install other Linux distros, among which is Zorin OS. My impression of the video is that the installation of Fedora seems relatively simple in comparision with Zorin or any other Linux distro that I've installed. Perhaps this is a good sign. As of yet, I'm only considering this new (to me) distro.

P.S., 11:11 AM:

This video isn't the SilverBlue distro mentioned on the other blog. AgileDevArt installed it via Windows. I'm contemplating doing it through Mint. That's a difference.

POGO oscillation theory as to cause of Starship's recent RUDs

An unofficial explanation for what's going wrong with the Starship's recent flights.

 

Floating to orbit on Mars?

JP discusses a tandem airship. However, there's a better idea with his airship to orbit concept employed on Mars. However, there's nothing wrong with idea of using the tandem airship to launch a rocket with Mars samples to a waiting spacecraft for a return to Earth.

 

But there won't be any takers, unfortunately. There's nobody who would fund this, in my opinion.

Construction ideas

 

Drill technology for geothermal heat pump

The device enables the use of pretty stable temperatures below ground level. Such a "heat pump" will only take the relatively constant temperature below ground, and move it into ground level structures in order to facilitate climate control. A heat exchanger and air pump is about all that would be needed, but that really isn't discussed in this video. The video is about the drill tech.

 

I like the concept.(the drill tech)

The Mosquito Coast reference deserves some discussion...

 

The Mosquito Coast reference is mentioned on the main blog here.

The idea for this post began with the basic idea from this link: "There's no such things as clean energy".

There's no comment upon the clean energy assertion, because there may well be an almost totally clean energy solution being developed right under our noses. It's called Focus Fusion. Focus Fusion is aneutronic, which mean that no neutrons are emitted. This is clean because there's no destabilizing neutrons that will cause succeptible atoms to go radioactive. This means virtually no waste. There may be SOME, but hardly enough for anybody to worry about, but purists undoubtedly will complain about ANYTHING.

It may be true that there's no totally clean energy source, but this one is about as close as it gets in the real world. All radioactive emissions are put to use, and there's no waste. Only helium molecules will be produced. The results will be limitless "clean" energy for millenia or even into perpetuity.

Of course, the technology is still under development and may not pan out. But the latest results are quite promising. We'll see.

With respect to the The Mosquito Coast scenario, we've already had refrigeration since before widespread usage of electricity. An energy source applied to a Stirling Engine will produce cryogenically cooling power. A Stirling Engine only requires energy. It could use sunlight, fire, or basic animal power to drive the device. Stirling Engines have been around longer than steam engines. They can be used without any "greenhouse" emissions whatever.

Or they could be power with an aneutronic fusion device like Focus Fusion. It would be very, very clean; and very, very efficient. Better than solar, but that would be faint praise.

Focus Fusion has a fundraiser going... If you want to invest, remember this: this could be a trillion dollar invention if it works. Disclosure: I own 1 share.

How to get stuff off the moon

Scott Manley discusses some lunar base ideas. He posed the question that I thought up myself awhile back.

This is what you call a "good question". It seems that I had a conversation with the gas gun guy who responded to my query about how to get stuff off the moon, and he said that you wouldn't even have to heat hydrogen that hot in order to reach escape velocity.

So a hydrogen gas gun would be better than a rail gun. By the way, you could recover electricity by having some brakes to slow down the accelerator device. The way it would work is that you would need to heat up a chamber full of sealed hydrogen. It wouldn't have to be all that hot. The expansion of the gas would create the push needed to get the sled up to escape velocity. The hydrogen gas can be re-compressed and liquified for storage for the next shot.