Archive for the ‘models’ Category

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Film review: “Interstellar”

November 19, 2014

“Any sufficiently advanced technology is indistinguishable from magic.” – Arthur C. Clarke

This quote applies, of course, to any number of science fiction films over the last fifty years. But I’ve seen so many reactions on the interweebs to this movie that seemed to be so wrong headed that I wonder if maybe there are several different versions of the movie out there, and I happened to see the one that actually used an extrapolation of science.

Physicist Kip Thorne and producer Lynda Obst started out, much like Kubrick and Clarke, to make a real science fiction movie that was based on fact, or at least logical extrapolations of what we know right now. After a bit, they attracted Steve Spielberg, who in turn suggested Jonathan Nolan to work with them on a screenplay. Ultimately Spielberg had to leave the project, and eventually Nolan got the script to his director brother Christopher Nolan. After some legal wrangling between Paramount and Warner Brothers, the film finally got started. Thorne had many discussions with the Nolans, the effects team, and cast members as the film progressed. For many members of the audience, it probably would not have been necessary to go this far – audiences today will suspend their disbelief for a lot of nonsensical pseudo-science. But the fact they did makes it that much richer for me, and hopefully for a lot of other folks as well. Thorne even wrote a book elaborating on the process, called The Science of Interstellar. I recommend it; not only does it give a good overview of the science used as a basis for the movie, but it also demonstrates how much hard work goes on behind the scenes in a film, sometimes for decades before the film comes out.

Let me say at the outset that I enjoyed the film a great deal. It’s long, at over 2 hours and 45 minutes, and early on it seems a little slow. However, I think that’s just the way I perceive it after all the cgi-laden action/adventure films that have come out over the past decade. This movie doesn’t start with a bang and then just keeps running along. It takes the time to build the relationships in Coop’s (Matthew McConaughey) family for us. However, it seems to take a much shorter time for Coop to be sold on the idea of what probably will be a one-way trip through the wormhole. But then, Michael Caine can be very persuasive, of course!

If you want a recap of the plot, you can always go here. Rather than that, I’d like to reflect on the main theme of the movie, which is, to me, “we can save ourselves with a little bit of time travel, just not the time travel you think.”

Nobody physically goes back in time. (In fact, Thorne is one of scientists best known for explaining why we won’t be able to do that.) However, that doesn’t mean that information can’t be sent back, in one way or another. All you need is a civilization sufficiently advanced to give a father a way to send some information to his daughter – if the father is in the right place, and if the daughter is the right daughter.

WARNING: SPOILERS AHEAD! I’ve read that some folks who have seen the movie took the bit of speculation about the nature of love as being a tangible, physical force that transcends time and space – presented by Anne Hathaway’s character – and ran with it. Sorry, y’all; you weren’t paying attention later on. It is made abundantly clear that the lines in the dust in Murph’s room were created by artificially-created gravity waves. No “Power of Love” here. I can understand some of the confusion, though: gravity is just as difficult to perceive, and no more easily controlled, at least by us. But not by the post-humans. (That’s what I call ’em. For a long time we are sort of led to believe they are some kind of super-beings just doing us a favor so we don’t die off. Coop makes the mental leap that they are our descendants, greatly evolved.) We never see them, and we only really see one effect of their presence. The “time lattice” Coop uses to communicate with Murph is apparently constructed by the post-humans only for that purpose, so he can give her the information she needs for a breakthrough that allows humanity to finally leave Earth, and apparently just in time.

In a way, this is the “transparent aluminum” storyline: In Star Trek IV, Scotty needs “transparent aluminum” to construct a tank for the whales. He gives the formula to a 20th century chemist/engineer so that he can create what Scotty needs. When asked by Dr. McCoy if this was messing with the timeline, Mr. Scott replies, “How do you know he didn’t invent the thing?”

I suppose transparent aluminum isn’t as big a thing in the 24th century as radio is for us. (Although if asked, most people would identify the inventor of radio as Marconi, if they had any idea at all. Grrr. Tesla, folks, Tesla. Look it up.) Still, Scotty wasn’t worried by bootstrapping materials science and creating the classic causality loop.

To make sure that humanity doesn’t die out by being stranded on Earth, the post-humans leave messages for Murph that subtly suggest to Coop that his trip through the wormhole might not be the sheer folly it seems. Therefore, he goes, lots of crazy stuff happens, and he in desperation makes the dive through the black hole’s event horizon. There they have set up the commo lattice – referred to in the film as a tesseract – for him to use to provide signals to Murph at various times of her life, including those that influenced him in deciding to go in the first place. He also can send the data the older version of Murph needs to make the breakthrough in mastering gravity so that we can get off this rock. He does this by manipulating the second hand on a watch through gravitational effects, sending a lot of data collected from inside the event horizon. It seems to take him only a short time to do this, but as we know, time inside a black hole’s event horizon is different from outside it.

So at the end of it all, no aliens – but something that started out as humanity has to help get its ancestors off the planet, or they won’t exist, and they placed the wormhole in orbit around Saturn just for that purpose. Seems like a long shot, but if they had the history of what had happened at that time, all they had to do is make sure the history had a little help to play out correctly.

Those of you who are believers in the “Many Universes” hypothesis probably won’t buy into this as much. In another universe, no wormhole; in yet another, no Coop to save them, etc. If that interpretation could be brought into the plot, the tesseract would have shown Murph in her room in many, many more versions of the situations that first and last provided communication with her. But the film stays firmly rooted in a traditional causality.

It’s not a new idea, but it certainly is played out in a refreshing fashion. I was happy to see a plot that took that much of the audience’s attention to follow in a big mainstream movie.

There are the nitpicks. First, Coop’s training sucks. They pretty much throw him into the ship with three other people, and away they go. That is necessary so that he can be the space cowboy he needs to be, flying the Ranger by hand at several key points in the movie.

Questions have been raised about the Ranger. Why did it need a big chemical-powered, multistage booster to get off Earth, yet takes off and lands under its own power on several other planets, including one with a surface gravity of 1.3 G? I have a possible answer, though it isn’t covered in the movie: antimatter.

The ships are a combination of tech we have now (Rangers are covered with shuttle-like protective tiles, for example) and very high tech (robots with advanced AI.) We know that making antimatter, at least the way we know we can do it right now, is very slow, requires very large equipment, and is very power-hungry. Maybe the Ranger could have taken off on its own, but say it uses 25% of its available fuel to do so. No more fuel after that. Let’s save some by using a sort of pseudo Saturn V that we had laying around. We may have fueled it with the last antimatter we could produce.

The Ranger has little room for fuel stores, so fuel has to be something very energetic, like antimatter, but it can’t take up a lot of space. Maybe a couple of tanks of reaction mass to interact with the antimatter can be squeezed in. Hydrogen is the best choice if the antimatter is really anti hydrogen, but it isn’t very dense so the tanks have to be insulated like crazy and be larger than LOX or H2O tanks would be.

The other nitpick is tidal effects. On the first planet the explorers are confronted with a tidal wave 4000 feet tall. The planet is too close to the black hole – close enough that time slows down a lot, and tidal effects on the ocean are enormous. The same tidal effects should affect everything on the planet, so it eventually will be torn apart. That to me means it isn’t a good candidate for a new home for mankind.

Also, apparently the light from the black hole (huh?) is bright enough to provide light bright as day – at least, a cloudy day in Iceland. Where is that light coming from, really? You would need it to grow crops. None of these planets sounds particularly pleasant or survivable in the long term!

My major gripe about the film is the score. Hans Zimmer was apparently asked by Christopher Nolan to do something unique. He’s done that if unique means boring, loud and simplistic. Sometimes it was so loud it covered important dialog. The score lent more of a feeling of slowness to the movie as it slogged along, repeating the same phrases over and over again. Did Zimmer listen to too much Philip Glass? I would have thought a score like Alan Silvestri’s for The Abyss would have been appropriate, instead. I think this movie would have been a complete knockout, Oscar-worthy, if the score wasn’t so annoying and boring.

Nolan likes using IMAX cameras, he likes using real film over digital recording, and he likes using practical EFX over CGI when possible. All are great, but remember, far more viewings of this movie will be on TV screens than in the theater. Until we all have our 85 inch 4K HDTVs that extra quality won’t be noticed…but a bad score will be.

In summary, I was pleasantly surprised. It’s not the landmark film some people have said it is, but it’s very good, and I highly recommend it to you.

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The Princess Cecile build continues…

October 10, 2012

Off and on, off and on. In bits and pieces I have a few other items finished. Designing this ship while I build it is pretty interesting!

In my previous post, I decided I needed to add some kind of “pods,” for lack of a better term, to provide more living space. I also decided the missile tubes would be located there.

After cutting the acrylic tube in half, I cut curves into the ends. Then after a lot of sanding I primed them and started to figure out how to attach them.

I hit on making some curved bulkheads. The tube halves, as they were cut, gained a bit of a twist, so I knew I couldn’t just epoxy the edges and hope. I started making bulkheads out of styrene, but that didn’t work very well unless they were very thin. I hit upon using some balsa foam I had around. It is pretty delicate stuff but it sands fast.

The “pod” half-round acrylic piece with the ends curved. Also, various bulkhead types I experimented with.

 

Each individual bulkhead was cut using the first one as a master, then sanded to fit.

A balsa foam bulkhead.

Then I made some more of the sheet styrene copies so I could cover the balsa foam, hiding it from view. I also put together a short piece of Plastruct girder, sanded down, and a piece of plastic tube (the missile tube):

Bad iPhone shot of the completed pod. The original bulkheads were sliced in two and spread out more.

It looks pretty bare, with no putty, paint or greeblies. And the forward end cap isn’t on yet!

A lot of the “personality” of the ship will be in finish details – little greeblies on the bulkheads, hoses, etc. Since the plan is to display the ship in the water, floating on the outriggers, I will need to cut some small openings all over the ship and add some hatches. Those will come later.

Before I can attach the other pod I need to cut a hole in it to continue the cargo hold opening that I originally placed in the side of the hull. I’m going to do that before I epoxy the pod in!

Then a little epoxy and the first pod was on the side of the ship:

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Closet cleanout – model kits for sale!

October 2, 2012

I’m cleaning out the closet (well, the storage unit) and I have some unbuilt kits I’d like to sell. Buyer pays shipping. (I am in Illinois.) I can take Paypal or a money order. UPDATE: I’ve removed the kits than have been purchased.

1 – AMT/Ertl Klingon Bird of Prey B’rel Class #38389 sealed, $ 25

1 – Polar Lights Klingon D7 snap kit #4202 sealed, $ 12

2 – Polar Lights USS Enterprise 1:1000 original series snap kit #4200 sealed, $ 12/ea

2 – Airfix Orion 2001 #06171 not sealed, $ 15/ea

2 – Heller Ariane 5 1:125 launch vehicle #71263, 1 not sealed but complete, $ 20/ea

 

Please respond to jwaggoner AT jdwaggoner.net for inquiries.

Thanks!

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The continuing adventures of the Princess Cecile…

August 23, 2012

Off and on. Fits ‘n starts. An hour here, an hour there. I got a couple of ideas that sort of took me in another direction. (To catch up, just use the search function over on the right using the keywords Princess Cecile.)

I originally thought of the Sissy as a simple with rounded ends…sort of like a modern submarine. But a sub uses that shape to equally distribute water pressure, and while the Princess Cecile has to withstand a vacuum, it probably encounters more stress from manuevers during battle than from any other source. (Drake notes that the ship rarely accelerates at more than 2 g’s.) Then I saw a set of 3D graphic images from someone on Flickr named xriz00 who did some beautiful renderings of the ship. (‘ve emailed him about posting one of his images here – no answer yet. Go onto Flickr and search for Princess Cecile and you will find his images as well as those from a gentleman named Marcelo Glenadel. His are more “realistic” renderings, if that’s the word…not as futuristic-looking, but more like I envision the ship should look.

Mine won’t look so slick, I’m afraid, but it’s beginning to take shape. Here’s the  taped-up mockup so far:

 

The other outrigger isn’t placed – I just put that one there to get a feel for it. The knobby thing in front is the prototype High Drive motor – behind it is the Mark I prototype HD motor that I ultimately rejected. The barbell-shaped thing behind it is not attached to the outrigger – it’s just there to get a sense of proportion. It’s a prototype oleo strut for the outrigger. The big knobby end would be embedded in the main hull, and the small one in the outrigger. I don’t think it’s too long…maybe. . I want to try casting it in resin to see how it looks. Patterns made of a bunch of dissimilar materials always look a little weird to me.

The clear plastic half-tube taped to the hull is the new addition. I decided the straight cylinder looked too plain, and i still can’t see how you can stuff the drive systems, environmental, stores, missiles and living space for over a hundred people in that small a ship. So I added a bit of living room. Inspired a bit by the images I spoke of above, I decided the missile tubes should run the long way in the ship. I don’t recall Drake mentioning their orientation. The hole in the top of the hull was originally going to be a missile tube, paired with another that launched down. It will be some kind of access port now, I guess.

The turrets for the plasma cannons got a little dressing up with some plastic tube and some milliput. I’m sort of making them look more like tank turrets, I hope.

I like the idea of using spheres as a primary shape a lot…it’s a shape not often used today on science fiction spacecraft, many of which are made to look really sleek and aerodynamic  even if they are not atmosphere-capable. (That was the cool thing about the original series Enterprise – it sort of look airworthy, but you could tell it was really only designed to fly in space. Then they supposedly brought it into the lower atmosphere in the episode where they went back to the 1960s. Subsequent versions of the Big E got sleeker and sleeker, but I would hate to try to bring the Enterprise-D into an atmosphere. Oh, wait…they did, and crashed it. I forgot!) Of course, the ships designed by Fred Ordway and Harry Lange for 2001 had spheres, but they were based on real science and utility as much as possible…not art. Sort of like a VW Bug vs. a 1959 Chevy Impala.

Cool lookin’ car, but really, did all the streamlining make any difference? (My dad had a brown one. Even in brown, it was cool.)

So anyway, I cut a 2 inch diameter acrylic tube in half and I will attach half to each side of the hull. Not sure how the ends will look. Maybe scalloped, maybe quarter spheres…I’ll have to see.

Of course, now I have to cut another door for the main hatch. The styrene tube of the hull cut a lot nicer than the acrylic, which tends to melt on the Dremel.

Go check out Flickr. These guys did some truly beautiful work! More later, when I get the sides attached and get some resin outrigger struts and HD motors made. Oh, and I have to redesign the plasma thrusters…and figure out the sail rigging…

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More Princess Cecile work

August 5, 2012

I’ve cast and assembled a whole bunch of thruster quads for the Princess Cecile build:

I really only need six, tops, but I don’t know which ones will look best painted. Since they were resin cast by me, they are “somewhat inconsistent.” Here’s a closeup of a couple of them – they are about 3/4″ across:

And here’s the next idea for the High Drive motor:

It’s a little over an inch long. I need a bunch of them, also. About half the resin I mix is wasted because I’ve been casting such small parts and I need to mix at least a half-ounce so I can get the amounts equal using my little plastic mixing cups. I figure once it’s ready, I’ll make one mold, then cast one, then make another mold. At least that way I can get two out of one pour. I don’t know what else I will need multiple copies of. It would make more sense to make more stuff at once, but I also hate to burn too much rubber making more molds. I have to think about that a bit.

I’ve been too busy to do much on the build. I have to tackle the masts next. I can’t figure out something that looks cool for the struts for the outriggers yet. Hmm.

 

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More on building the Princess Cecile

July 16, 2012

Those of you who have followed my ramblings as I slowly work on a (mostly) scratchbuilt model of the starship Princess Cecile from David Drake’s Lt. Leary science fiction book series – here’s your next little bit:

The thruster quads I was trying to cast in resin turned out to be a challenge. I tried several different molds, trying to make one as a one-piece casting with the mold in two halves, and as two separate halves poured, sanded flat, and glued together.

In both cases I had problems with air bubbles or voids. Splitting it vertically in two helped a bit, but that still required getting the halves exactly flat and so they would line up when I glued them together. I learned a lot about the behavior of resin and moulding rubber, though!

The more time I spent with these parts, the more I was convinced the quads were just too big. They would scale out to 10 to 12 feet across, nozzle to nozzle. Granted, a warship has to maneuver quickly and so they would need to be larger, most likely, than on a commercial spaceship.

The trend today is that such thrusters would be mainly contained inside the hull of a spacecraft, I guess, if there is such a trend. The thrusters on the SpaceX Dragon vehicle only show the openings of the rocket nozzles.

A test firing of the Draco thruster for the SpaceX Dragon

You can see the thruster openings on the SpaceX Dragon – the four ovals below and to the left of the hatch.

No doubt about it, the Dragon is a well-designed little ship. But she’s not a fighter, and (hopefully) she will never have to take battle damage. The ships of the RCN routinely are repaired during battle by the riggers, who wear armored spacesuits because there’s stuff flying around out there. Drake usually refers to the riggers as needing to repair the rigging and sails so the ship can re-enter the Matrix. The design of the RCN ships was predicated on making them as similar to sailing vessels as possible for narrative purposes, I think.

One other point is that the RCN ships are built on steel hulls and are an interesting combination of high tech and low tech. In one of the books a ship is radically rebuilt on the ground on a mostly uninhabited planet. Just like the sailing ships of Aubrey or Hornblower, sometimes the crew finds it must effect major repairs without the benefit of a shipyard.

So…external thruster quads just sounded like a good idea to me. Here is the Apollo command and service module combo, showing the thruster quads:

See the thruster quads?

Closeup of the Apollo Service Module thruster quad

So…I still wanted them on the exterior of the hull, so they could be repaired or replaced without quite as much danger of explosion. It didn’t make sense to me to have them located inside the hull placing a bunch of small (relatively)  rocket engines where they could be dangerous to the crew, with openings through the hull for the exhaust.

So I made a couple of sort-of tetrahedrons about 3/8 of an inch on a side out of balsa foam. It’s a little too porous, but once I cast some I could sand the sides smooth. I also made a few small rocket engine bells based on the FP von Braun ferry rocket engines. I glued one set together. Here it is, next to the old master:

Test version of the new quad.

The whole thing is less than  3/4 of an inch across. That still makes it about 12 scale feet across, but I think they will look more in-scale and they are about as small as I can make them. I may try making one with the “shoulder” on the engine bells removed. That would make it smaller, but it would also make it far more delicate – the nozzle throat is about 1/16 of an inch!

I’ve not drilled out the engine bells. I should have done that first, with a pin vise. I’ll have to do that on the next set before I attach them.

I think these will give the ship a bit of a “retro” look, which is what I’m going for, anyway. I don’t see the ship as a beautiful, streamlined aerodynamic vehicle – in fact, Drake notes than when entering the atmosphere too fast it is far too easy to tear the rigging right off the hull. This is a ship that does not enter an atmosphere ballistically. It is under power at all times.

So, slow going. One other thought it to somehow create even smaller engine bells that would look more like the Apollo bells. I just don’t know how I would hold them on!

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Scratchbuilding the “Princess Cecile” – the perils of resin casting

July 3, 2012

If you read the previous post on my scratchbuilding project, the Princess Cecile from David Drake’s Lt. Leary/RCN novels, you know that I have been working with resin casting a bit, trying to duplicate my master for the “thruster clusters.”  I have a couple of issues with the design of the thruster clusters yet, including the fact that they are big – not big on the model, but in the 1:200 scale of the model they would be about 15-20 feet across! Each rocket nozzle would be about 5 feet tall. However, the ship is supposed to be 230 feet long and it should displace about 1300 tons, so moving such a massy object would take some pretty big thrusters. In particular, the thrusters on a warship should be oversized compared to a commercial vessel so that they can maneuver quickly in a battle situation. The Sissy must be nimble!

So, I’ve been trying to get better results making resin castings of the master. The first mold I made yielded only far results, with some bubbles in the surface because I was overzealous in using mold release. I also used the wrong mold release agent – stupid! I used the aerosol kind intended for making resin castings, not the liquid stuff used to keep the master from adhering to the master.

I decided I needed to make new masters. I tried making them in the other orientation – with one nozzle pointing down – and making it in two halves that would be poured without putting them together. The problem there was that two thrusters would be made in halves, and the downward-facing one would be hard to pull from the mold. The technical term is undercut, meaning that the bottom of the nozzle has a larger diameter than the throat above it. That would require me to pull the resin copy out by forcing it through the rubber.

I actually tried a couple of these and they, frankly, sucked. I decided that I would just make a better version of the first two-part mold.

The master, sitting in clay, for the mold that didn’t work.

The master that didn’t work, both parts.

Both halves of the new mold, which looks a lot like the first one. I used big toothpicks to create the air bubble release holes instead of wire.

And I was so excited that I forgot to spray the inside of the mold before I poured the resin, and got this:

Ugh! And the nozzle broke off trying to pull it out of the rubber.

I sprayed the mold and tried again. This time I got a better result:

It was easier to pull out of the rubber this time, but it was still dicey.

The problems pulling the copy out of the mold were reduced, but not eliminated. Those long slabs on the image above are the air bubble holes, filled up with resin. The resin flowed through the mold well, however, and there were no large bubbles. The other problem is that the very bottom of the mold is made of clay, not rubber. It helped hold the master upright when making the mold. A little comes loose with each pull, even after spraying it with mold release. This one looks a lot cleaner, though, and except for removing the plugs on the ends of the nozzles, this one will take much less time to clean up.

By the way, while this one was curing, I cleaned up the other one to see if it was salvageable.

I still have to find a way to glue that nozzle on.

It would need more precision sanding before I would be ready to prime it.

I’ve considered having a more complex shape made in CAD and then having it grown in a 3D printer. I just don’t have the chops with a 3D program to make that happen. I tried a couple of programs, but the free ones don’t seem to work very well and the cost of the higher-end versions – whew!

There is an advantage to using these big thrusters on the Sissy, though. In the books, the riggers sometimes had to remain out on the hull while the ship moves in real space, not just in the Matrix. In the Matrix the ship moves by adjusting the direction of the sails, but once the ship was out, it often jumped right into the thick of battle. One of Daniel Leary’s skills is being the best astrogator this side of his uncle Stacy Bergen, who plotted many of the routes from star to star still used in Leary’s time. Leary could drop out of the Matrix closer to a planet than almost any other captain. This advantage meant that often the ship dropped out of the Matrix and right into the fighting, without having the time for the riggers to come back inside. Often they stayed outside anyway to cast off broken rigging before it fouled the guns or the missile tubes.

So anyway, if the thrusters were smaller and closer to the hull a rigger could be in the way of the exhaust of the rocket engines. Bigger clusters put the nozzles higher, farther away from the hull, where they would be less danger to the riggers. At least, that’s my rationalization!

One other thing. I’m playing with this possible High Drive motor:

I don’t think I like it. And i’s too big.

This thing is about an inch and three-quarters tall. Since an average person is about 3/8″ in this scale, this motor would be almost 30 feet tall in scale! In one of the books – I think it’s “The Far Side of the Stars” – the crew has to install some High Drive motors on another ship while both are on land, not in the water. Adele had hacked into the other ship’s computer and re-routed the plasma thruster controls to the High Drive motors. Using High Drive motors anywhere other than in vacuum is very dangerous, because they operate by matter-antimatter annihilation. The result was that the ship was badly damaged, but the was repaired by the crew of the Sissy and sent back as a sort of Trojan Horse. Since the High Drive motors were destroyed when they were used on the ground, the crew pulled some motors off of a “country craft” that was abandoned in the jungle nearby.

The description doesn’t make it sound as if moving the motors was an insurmountable problem, just with the resources carried on the two ships. It is mentioned that each motor weighs about half a ton. This is about the same weight as a SpaceX Merlin first-stage rocket engine probably weighs. I could see the High Drive motors as about the same size as a Merlin as well. This puts them about the same size as one of the rocket nozzles on the thrusters.

Part of the problem of the prototype above, besides size, is that the wire winding (which is to represent that used to create the magnetic field required for an motor using antimatter) is too big and probably beyond my skills to make prettier. A High Drive motor should be a device that generates and manipulates magnetic fields to control the mix of matter and antimatter.

In the second book the High Drive motors are on the bottom of the main hull, all together. Later they are described as being on the outriggers, in case something bad happens. However, how do you send antimatter to the engines if they are on the outriggers? That’s almost a bigger problem than building the engines!

The motor may not even need a physical nozzle, since the antimatter can’t touch it. I think I have to look into antimatter engines more. Robert Forward described how to make ships operate using “mirror matter,” but not in detail for small motors like this. And most of his required just a little antimatter mixed with more regular matter, usually hydrogen, and superheats the un-annihilated hydrogen to use as reaction mass, as a sort of super-rocket engine.

I know, you can’t study this so close or the physics breaks down! How do they make antimatter, anyway? They even have missiles with small High Drive engines on them, so controlling the magnetic fields must be old hat for these crews. I know – just ignore some of this and read the damned stories!

But to build something that looks believable – well, I have to get my head into the RCN universe and extrapolate. A lot.

My next project after this is the Alliance Space Ship Vorpal Blade, from the John Ringo/Travis Taylor book. It was built from the former USS Nebraska, a ballistic missile submarine! And it has a gigantic – well, sword – on the front! Doc Travis gets the science as right as possible, within the limits of storytelling. Giant intelligent chinchillas on antigravity golden surfboards?

(I have to do this one because I was a “red shirt” in the book. Long story, but John Ringo put a bunch of folks in as red shirts and then of course got them killed off. My character, an intel geek who completely misses the evidence pointing to an incoming invasion of “demon” dog-like creatures, gets torn apart by one of said creatures. And hey, John, I wear glasses and I suppose I’m kinda geeky, but my ears do not stick out! :))