SIM Modelers - Post Your Designs

Discussion in 'Scratch Built' started by EXPjawa, Jul 9, 2016.

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  1. Jul 9, 2016 #1

    EXPjawa

    EXPjawa

    EXPjawa

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    This thread is sort of a mental tangent offshoot of several others that have been active lately - including the Assymetric Stability discussion, the general discussions surrounding the Summer Build Off, even the Rocksim Depository. I thought it would be neat to have a dedicated thread to unique designs that have been made possible by using Open Rocket & Rocksim. This gives the OR gods a place to show off, Rocksim gurus a place to critique and collaborate, etc.

    What I'm envisioning is contributors posting sim renderings that they've come up with, describing what they're goals were in designing, what cool details that they were able to model. I'd prefer to keep this to unique designs (think Summer Build Off style) that do not take from pre-existing rockets. Odd rockets and rockets that look like trains, dragons, buildings, etc. all apply. But you should be able to post a sim rendering of it. It does not, however, have to have actually been built. This isn't a contest, but is rather intended to be a pot for stirring up imaginations for designing.
     
  2. Jul 9, 2016 #2

    EXPjawa

    EXPjawa

    EXPjawa

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    I'll go first. Some background about me: I'm an engineer. I'm not an artist or a graphic designer. The reason I'm not those things isn't because I can't draw (I can pretty well, thank you), its because I lack the artist's outside the box imagination. So coming up something completely new and novel isn't my strong suit, but I am very good at recombining other ideas into new forms or putting them to new uses that were outside their original intent. So I do struggle to come up with truly new thoughts with regards to design and form. Most of what I do devise are, as you might guess, new spins on existing ideas.

    Anyway, why that's relevant, I dunno. But here's my first posting on the topic, I drew it up last night while listening to some early Pink Floyd - though I don't think that really has too much bearing on it. I call this thing Triventium; I had come up with a more clever name but forgot it. Its intended to be a fairly large, but simple and lightweight, cluster rocket with some sci-fi elements added. I have not devised a backstory for it, like I sometimes do. This should be a fairly easy build if I ever do.

    Triventium3.jpg Triventium1.jpg Triventium2.jpg Triventium4.jpg

    View attachment Triventium.rkt

    Rocksim says it'll manage about 850' on 3X E9 motors, and even lift fast enough to be stable on a 4' rod. Assuming they all light...
     
  3. Jul 10, 2016 #3

    Screaminhelo

    Screaminhelo

    Screaminhelo

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    I like your idea! I enjoy playing in OR from time to time and I may have one or two designs on my old laptop that are worth posting here.
     
  4. Jul 10, 2016 #4

    K'Tesh

    K'Tesh

    K'Tesh

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    I wonder if anybody has simmed the Anti-Moose Missiles from 19-2000

    Here's the only shot I've been able to find of it.
    [​IMG]
     
  5. Jul 13, 2016 #5

    EXPjawa

    EXPjawa

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    Alright, I'm going to keep posting here until other catch on. After further developing the Triventium design, it evolved into something a bit more sci-fi inspired. I present the SS Triconderoga.

    Triventium2-1.jpg Triventium2-2.jpg Triventium2-4.jpg Triventium2-3.jpg
    This is, obviously, a deep-space exploration vehicle. Operated by a small crew of researchers and engineers on long-range missions, the Triconderoga is powered by a trio of ducted nuclear reflux reaction motivators. Solar arrays supplement experiments and general power needs. The primary crew quarters and bridge areas are located in the forward hull, as far removed from the engineering area and power cells at the rear of the ship.

    At one point, I had a second, larger, ring tail just ahead of the wing fins. This was intended to visually represent a ring the would be rotated to provided some gravitation for the crew. But it added too much drag, and even though the rocket is only projected to be around 10oz, three E12 motors could only lift it to 500' or so. It also necessitated so nose weight to stabilize, since it was far enough forward that it pulled the CP up. So I took it off. It was aesthetically quite busy too; I'm rather fond of the design as it stands now.
     
  6. Jul 15, 2016 #6

    EXPjawa

    EXPjawa

    EXPjawa

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    OK, on tonight's edition of Post Your Designs, I bring you the Fast Burn Rocket Shuttle. The name is taken from the craft referenced in - but not shown on screen - the Firefly episode "War Stories". The FBRS was used by Niska's team of mercenaries to kidnap Capt Reynolds and Wash, leaving a distinctive track on the sand. Since the ship isn't pictured anywhere that I'm aware of, I have a sort of free hand to design it as I see fit:

    [​IMG][​IMG]

    I'm imagining that the shuttle is operated by a crew of two, with the side-by-side cockpit under the streamlined canopy. There's a cargo/passenger bay just aft, with a row of center-facing seats on either side. It can haul 8 troops, or 2000lbs of cargo. There would be side doors behind the canards, which extend up into the turtle deck area. Flight in atmo is powered by the ram-jet turbine hybrid engines mounted on either side of the rudder, but a large "fast-burn" rocket motor at the rear of the fuselage provides short-range space flight, as well as sufficient thrust to make rapid escapes possible. As such, the type is quite popular with smugglers and mercenaries alike, but is most commonly found operating from larger cruisers or space platforms.

    Fast-Burn Rocket Shuttle-2.jpg Fast-Burn Rocket Shuttle 1.jpg
    View attachment Fast-Burn Rocket Shuttle.rkt
     
  7. Jul 15, 2016 #7

    K'Tesh

    K'Tesh

    K'Tesh

    OpenRocket Chuck Norris

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    Niece Work!!!

    EXPjawa is apparently the Master of RocSim!
     
  8. Jul 16, 2016 #8

    jqavins

    jqavins

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    Joseph Avins TRF Supporter

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    Wow, I guess great minds really do think alike. I did this one years back and will probably never build it.
    Colony.JPG Colony 2.JPG Colony 3.jpg
    It's a long range colony ship. It runs on nuclear powered ion propulsion, which is why 1) the passengers and crew must be far away from the engines, in the forward tube on the ends of those pylons, and 2) the engine compartment needs large thermal radiators (which conveniently act as fins when a small model of the craft is flown on a cluster of three 24mm motors.) The one pylon of a different color than the rest allows access to the engine section when it is required.

    I think these two ships were built in the same ship yard.

    Note that I generally use color in RockSim to visually differentiate the various pieces as much as to represent potential paint schemes. The "real" ship does not have bubble gum colored motor mounts.
     
  9. Jul 16, 2016 #9

    jqavins

    jqavins

    jqavins

    Joseph Avins TRF Supporter

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    Here's one from even longer back, despite the appearance that I'm ripping off Gary.
    Dart 1.JPG Dart 2.jpg
    I've got a bunch more, as I just love playing around in RockSim, designing stuff I'll never build. I'll sift through for more worth posting.

    I have a delta-winged plane style design partially finished that is the next thing I should do with my elliptical body tube, but that can't be rendered in RS or OR. Maybe I'll break the thread rules and post both the best approximation from RS and a truer picture from OpenSCAD.
     
    Last edited: Jul 16, 2016
  10. Jul 16, 2016 #10

    jqavins

    jqavins

    jqavins

    Joseph Avins TRF Supporter

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    Last one for now. This is a two stage, 29mm missile, with the upper stage kinda sorta inspired by a Nike upper stage.
    Nike-ish.JPG Nike-ish 2.JPG Nike-ish 3.JPG
    One thing I like about this is the nose. I modeled a highly rounded ogive by using an ogive transition and a parabolic tip, carefully matching the slopes at the junction. I've been working on and off on the math to get this perfect. (I can match the slopes, but I'm still working on matching the curvatures as well.)
     
  11. Jul 16, 2016 #11

    rstaff3

    rstaff3

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    OK, since it flew today, I decided to add the Chesapeake Sea Monster diagrams. The main set of three 24mm mounts aren't canted like on the real thing. ekranoplan2.jpg ekranoplan.jpg 23116386469_33870df1b9_o.jpg
     
  12. Jul 17, 2016 #12

    rstaff3

    rstaff3

    rstaff3

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    And some more...all these flew... Ankyo.jpg 3ductor.jpg centaurus stand off 2.jpg boost glider 1960s.jpg flics lucky 13.jpg hostile_projectiles_delta_x15.jpg scratch_gemini_titan_v rev4.jpg
     
    Last edited: Jul 17, 2016
  13. Jul 17, 2016 #13

    rstaff3

    rstaff3

    rstaff3

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    And some more:

    9145599827_102a68ed59_o.jpg 9099834673_d9290a8688_o.jpg 9099834603_c6637d11bb_o.jpg 9102063812_080a9428ce_o.jpg 9099828363_35e5b3c520_o.jpg 9099805249_92f19310e6_o.jpg 8858858906_113c581094_o.jpg 9145599721_8413d80cc5_o.jpg 9099833651_a566e1665b_o.jpg 9102064692_73bc70b143_o.jpg
     
  14. Jul 17, 2016 #14

    dhbarr

    dhbarr

    dhbarr

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    If that federation starship is a rocksim, I'd love to take a poke at it.
     
  15. Jul 17, 2016 #15

    jqavins

    jqavins

    jqavins

    Joseph Avins TRF Supporter

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    I'd love to see this one break apart at apogee to reconer independently.
     
  16. Jul 17, 2016 #16

    rstaff3

    rstaff3

    rstaff3

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    It was in Rocksim but I can't find the files for some of these. Still looking...
     
  17. Jul 17, 2016 #17

    rstaff3

    rstaff3

    rstaff3

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    Nothing that fancy. The real thing is a clustered, finless, 'GDS' model. This one has flown successfully.
     
  18. Jul 17, 2016 #18

    rstaff3

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  19. Jul 17, 2016 #19

    dhbarr

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  20. Jul 17, 2016 #20

    rstaff3

    rstaff3

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    I downloaded it...again.
     
  21. Jul 17, 2016 #21

    EXPjawa

    EXPjawa

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    Guys, that's stuff is awesome, keep it up. I'm particularly impressed with Dick's modeling of the ekranoplan - have you been able to correlate the sim to real flight performance yet? The closest thing I've done to the triple tube design is a model I call Binary Star:
    Binary Star.jpg WP_20160622_20_33_01_Rich.jpg

    Which I built last year. It currently needs some repair after landing on a step ladder at URRF3 last month.
     
  22. Jul 17, 2016 #22

    rstaff3

    rstaff3

    rstaff3

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    I regret not flying the Alt3 in it, but was chicken. My gut says the sim is way over-optimistic. It says 1000+ ft and I seriously doubt that it came near that.
     
  23. Jul 17, 2016 #23

    EXPjawa

    EXPjawa

    EXPjawa

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    Joe, as it happens, there's a third model from the same shipyards - the USS Tiberius. I continued development of the same concepts that lead to the Triconderoga, but wanted something with different diameters between the front and rear modules. So, the rear section is now BT101, though the front remains BT80. And I played with the fin/tube arrangement. Also, I went to four connecting tubes - the core is BT20 with a full-length coupler for reinforcement, surrounded by three BT5 tubes. I've debated whether they should be linked by trusswork, but that would be tedious. This is the result:
    [​IMG][​IMG]
    Also, for this one, I've clustered three 29mm mounts, so it would fly on E16 or F15 motors. But there's enough drag to keep it low and slow. I have noticed a quirk in Rocksim, which I assume has to do with its rendering. It seems to have issue with correctly placing tube fins that aren't on symmetric planes. For this model, I applied two sets of three tube fins, with the intent that they'd be at 120 degree spacings, but indexed off of center so that a rail could fit between them. They'd basically be on either side of one of the large fins. But, as you can see from the rendering, in the 3D view it has essentially flipped them on the vertical axis so that they appear centered in pairs between the fins. See how they're applied in the 2D views:
    [​IMG]
    [​IMG]

    I saw the same phenomenon when I modeled both the Estes Hawkeye and NASA Pegasus rockets; but have tube fins above the wings. In both cases, Rocksim renders them below in the 3D view...
     
  24. Jul 17, 2016 #24

    EXPjawa

    EXPjawa

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    Here's another one that I've been working on lately. There's a build thread for it somewhere, but the construction is mostly done. I'm in a painting phase, except that I've elected to paint the pods separately before I attach them. So, that's the stage I'm at. I call this Berthasaurapod. Don't ask why, suffice it to say that it amused me. The design is basically a highly modified Big Bertha, and it has pods attached to it. Thus the "saurapod" part of the name. I guess I explained it anyway; it made a more natural connection in my head... Anyway, I had Mark Hayes make me vinyl decals that have the name, plus a variant of a cartoon dinosaur as rendered by the late Johnny Hart of the B.C. comic strip fame (who happens to be from the same home town I am). Without further ado:
    View attachment 297103 View attachment 297104 View attachment 297105 View attachment 297106

    You can see from this and above designs, I have a thing little strake fins. Unfortunately, the SRB pods are strictly dummies, the only motor is in the central core tube. The SRB nozzles are too small for 1/2 motors, though in looking at the micro rocket kits I just received today from Flis, the micro motors might fit. But it would still leave a thin wall section in the nozzle balsa. I think this will scoot well enough on an E12, or possibly F32 motor...
     
  25. Jul 17, 2016 #25

    rstaff3

    rstaff3

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    I really like all those little strakes!
     
  26. Jul 17, 2016 #26

    jqavins

    jqavins

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    Joseph Avins TRF Supporter

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    It's weirder than that. Not only are the 2D and 3D renderings 180 deg apart, but the base view when you're setting the radial angle is half way in between. I did up some simplified cases to demonstrate and sent them to Tim. He forwarded them to the programmer.
     
  27. Jul 18, 2016 #27

    EXPjawa

    EXPjawa

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    That would explain why I had issues calculating the angles to put them at; I was sure my math was right, but they wound up in the wrong spot... :rolleyes: I might send a sample case to Apogee as well to help reinforce the issue. Maybe the program will get fixed. Just like maybe they'll back an "undo" function that actually undoes something...
     
  28. Jul 18, 2016 #28

    EXPjawa

    EXPjawa

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    Thanks! But they are a pain to cut out, match up, bevel, and align...
     
  29. Jul 18, 2016 #29

    EXPjawa

    EXPjawa

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    My next installment: Sagittarius Arrow

    [​IMG][​IMG]

    This is one of my favorite somewhat recent designs. I'd sooner say this one comes from the shipyards on Naboo than the more local ones that built the above utilitarian craft. I basically designed this one around the long plastic BT70 nose cone that Apogee sells, but after using said cone on another model, I didn't like the way it fit up to the body tube. So the design was adapted to use the LOC 2.2" cone, with BT70H tubing. The outer pods are BT55, so the overall length comes in at 42". That makes for a nice sized, sleek ship that should handle moderate H motors well.
    Sagittarius Arrow-4.jpg Sagittarius Arrow-3.jpg
     
  30. Jul 18, 2016 #30

    neil_w

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    Ha, mine seem pretty simple compared to all these. But here goes. These are all designs that I consider to be either "finished" or at least close enough to present; I have a zillion others in various states of incompletion.

    Diamond Cutter: built but not yet flown
    [​IMG]

    Biohazard: build in progress
    [​IMG]

    The remainder are not yet built.

    Ring Warrior
    [​IMG]

    New Ring Warrior (yeah, names need some work here)
    [​IMG]

    Launch Lug Nightmare (it'll get a "real" name at some point if it gets built):
    [​IMG]

    Space Needle
    [​IMG]
    Pong (thanks Ken!)
    [​IMG]

    I'll post the ORK files on request.

    bio_update_final.png

    balls.png

    needle.png

    new_ring3.png

    rw5_update.png

    diamond_cutter.png

    lln_photo3.png
     
    Last edited: Jul 22, 2016

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