Captain_Quinn

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  1. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    They're still 1x3 for the most part, but I raised the mount location to avoid a conflict and didn't account for that change... which now looking at it, makes for an easier situation in building the launchers. Thanks for picking that up. Easy fix that I can implement without having to change any of the instructions work done so far.
  2. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    Quick update... Exhibiting my build (which I've dubbed the EAS Achilles) with the local AFOL group this weekend. In preparing it for transport I've learned that no matter how much you try reinforcing some structures in Lego, there's going to be bend and flex. Anyway, here's a quick snapshot of that part of my display. Instruction development is coming along nicely, although I keep finding errors/improvements. Improvements have been noted for future updates and only errors are being corrected now.
  3. Captain_Quinn

    Babylon 5

    It wouldn't be a big surprise to know that along with the Warlock class Dreadnought, I've been trying to design some cylinders in order to make an attempt at building the station eventually. My current winning prototype is a combination of 12 sided and 16 sided 'cylinders' using a combination of technic 1x6 bricks and 2x2 plates with two pin holes on the sides. I'm having to get creative with the use of axles, technic bushes and the right angles in order to build a suitable internal framework. The incompatibilities between system bricks and technic elements is really showing itself to be a challenge here. This began with an experiment in trying to motorise the Omega Class Destroyer with a set of planetary gears, and as that got out of control, grew into the rotating section. I'm having serious doubts about the scale so far, as I'd be looking at nearly 2mtrs length for the whole station, and about 1.2mtr for the rotating cylinder. I have an idea about integrating a stand into the design (i.e. instead of the model and stand being separate, like with the UCS X-Wing, Y-Wing, etc, having it as part of the internal frame, like with the Star Destroyers) and using it to rotate the cylinder... that may limit the influence of gravity and provide a more stable mechanism for rotation
  4. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    ok, so a (not so) quick update on where development is at on my v1.2.x series of this design... Prototype build: this highlighted some areas for improvement and simplification that have been implemented. This (at the time) reduced the part count and the number of build steps, not to mention the complexity of, and challenge in building, certain sections. These changes were all internal and have not affected the appearance. Parts selection: in uploading the design to Bricklink and generating a parts/wanted list, a few alarm bells started ringing in terms of parts availability and cost. This has led to several redesigns, most of which are visible. Redesigns of the engine section to address the influence of gravity involved using parts that, as it turns out, are quite expensive. A bit of creative license in detailing later, and the cost of sourcing the necessary parts for that section dropped by almost USD$100. Another aspect of the build that was tempting to change were areas of surface detail that could be made using alternate parts... for example, a section of 4 2x2 tiles could be replaced with 4 1x4 tiles, or 2 4x2 tiles. At this stage I've avoided such changes unless they improve the stability of the section involved, or significantly reduced the costs for parts. Instructions: these are in the works. Several attempts at these had been made whilst I was prototyping and redesigning. I learned early in the process that implementing changes to instructions is not easily achieved mid process. I had hoped to have these finished before certain professional/educational commitments (I'm a final year allied health student undertaking clinical immersions this year) but priorities have shuffled this project down the list. However, some excellent progress has been made on various aspects of the final instructions, and whilst they may not be as awe-inspiring as Mirko Soppelsa's Star Bricks in terms of production quality, but I hope that the ideas coming to fruition in that regard will be appealing to not only the Babylon 5 fanbase, but both the broader Lego and Scifi communities. Current state: version 1.2.37.5.... so, 37 major revisions in design to @manglegrat's release, with a few updates to details on the last of those. A 'quick and dirty' conversion of the design file into instructions has been rendered, 92% of the 4722 parts are boxed up with the remainder on order... and my kids are on standby for a final build test (the idea being that if a 10 yr old and 13 yr old can build this, anyone older can). Artwork for the instructions is being sourced/produced, a photographer has been approached, along with some 'value-add' contributions from the B5 community. Barring any major impediments or problems identified by the "child duo build test", this will be the release version. I'm aiming to display this build along with a few other builds at our local Lego AFOL Clubs next exhibition in a fortnight. Future developments: as has been discussed here, the two previous designers, @Rolsen and @manglegrat, deserve massive props for their designs, on which this is based. One of the challenges for future versions has been motorising the rotating mid-section... and suffice to say, when I need a break from the work on this project, studies, family, pets, door-to-door salespeople... this particular challenge is what I turn my attention to (no dad-joke worthy pun intended on that). I _think_ I've come up with a design that addresses the challenges presented by the scale of this design and maintains the stability between sections. I need to prototype build this design, which will require reading up on the PF motors, their specs and their requirements. Goal: to release professional quality build instructions (electronic and print-on-demand) on par with those produced by @StarBricks and @Davdup by mid-2018 via a donation-ware model, with all proceeds going to global humanitarian charities. My goal here is not to profit on the intellectual property or previous design works of others, but to spread an enjoyment of Lego, Scifi and Babylon 5 to a wider audience. It's my hope that the quality of the design, build and instructions will motivate those wanting to include this in their collections to help charities such as Doctors Without Borders (Medicin Sans Frontiers), Unicef and the like. My thanks to Rolsen and Manglegrat for agreeing to and endorsing this particular aspect, as without both their works and agreement on this, I'd not likely have gone down a release path.
  5. Captain_Quinn

    [LDD] Battlestar Pegasus (MOC recreation)

    You, sir, are a gentleman and a scholar... love your work
  6. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    The other factor that comes to mind with a direct drive is the torque/power of the motor and the ability to vary those to suit. I'm not familiar enough with the PF motors to know whether or not that's possible... so my thinking at this stage is to may try a combination of parallel axles and stepping down of gears, along with a planetary arrangement to spread the forces and balance them between the sides of the inner turntable. Having the PF motors axis off-centre to the turntable could work in your favour here, especially if you want to have the final drive axle on axis with the centre of the turntable. Looking at some of the planetary gear setups that use those particular turntables, it looks like a central drive gear (sun gear) with two planetary gears driving the internal ring of moving part. That alone should have a reduction gear effect, more so if your central drive gear is smaller than the planetary gears. I think if you can have a short enough axles, and the right step down combination of gears to increase torque/reduce speed, you can make this work without to much stress on the components.
  7. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    Very cool. Can you leverage the pin-connections to the power functions motor to stabilise the frame? The challenge as far as I can tell will be the distance to the technic turntable and the amount of twisting that a technic axle can withstand if you're looking at a direct motor-turntable drive. After that, like you've said, it's a matter of friction, momentum, torque, etc. I was talking to my father and brother (both are mechanical engineers) about this challenge and they started talking about planetary gears as a solution, but placing multiple axles and cogs is going to be massively challenging in the confines of the current design. What's the position/alignment of the motors axle compared to the centre of the turntable? Aligned with the centre or off axis?
  8. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    oh mate... the heat has been merciless. More than a few days spent indoors with the aircon on and the Lego spread out. We've been giving our dogs ice cubes to help them stay hydrated and keep their temperature down. I'm not sure what's worse... extreme heat or extreme cold... although, I always thought it was easier to warm up by throwing on another layer. After all... there's only so many items of clothing you can remove before someone complains, or calls the cops I was concerned that the weight of each side of the habitat section was going to result in detaching from the rotating centre, so I designed a set of internal clips that connect the frames of each level, but in changing the internal structure to suit, I think I may have reduced the mass enough that it's no longer an issue (if it ever was one). That's one of the changes after the prototype build. I solved the engine sections gravity sag problem and came up with a way to connect the forward sections armor that is easier to build. In trying to sequence the steps to build, I've had to reconsider some choices in parts and design. Seems your advice on building before producing instructions was both sound and wise. On the upside, I could likely build one of these without even looking at instructions now. I'm hoping to have both the build and the instructions ready for April's exhibit. I seriously underestimated the time, effort and work that goes into producing instructions, as well as the importance of good planning in the early design stages. Photos will definitely be forthcoming. Thanks man. 7 years ago my kids saw how miserable my previous career was making me and I overheard them asking their mother why I was always sad... talk about a wake up moment. Changing from IT security and policy to allied health (training to become a physiotherapist) has undoubtedly been among the top 3 good decisions I've made in my life. Marrying my wife and reconnecting with my passion for Lego being up there :) I've resigned myself to a future full of study in staying current with qualifications and evidence basis.
  9. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    Over the summer I've been working on the instructions for this build, beginning with a functional prototype (usually, just colours are different, sometimes it's an aesthetic change, but always functionally equivalent), and finishing with a list of changes, build notes, errors and improvements. Along with that has been one very important lesson; don't over-engineer your design... sometimes, the simplest solution is the most effective. I had originally designed a set of locking pins to secure the rotating sections habitat decks, but as it turns out, clutch power was more than sufficient. What it's also spawned is a set of ideas on changes that will go into the next generation of this design, along with a few design ideas that have potential for future MOCs. But for now, there's a 4kg, 4700 piece, 1mtr long Lego Omega Class Destroyer sitting on my coffee table, along with the epic task of generating instructions whilst resisting the temptation to further tweak the design. Putting the instructions together will be a part time task as studies permit (I'm about to start my final year of studies where I'll be in clinical immersions 9-5, Mon-Fri, and swamped with a cruel and unusual amount of portfolio work after hours). Our local AFOL group is planning an exhibit in April, and I'm hoping to have a brick built version ready to display.
  10. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    Although, you've given me an idea on how I might be able to do an indirect drive on the rotating section. Just need to see about positioning and structure on the centre section
  11. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    The idea with the wheel/tyre is to combine with an inverted plate with pin on bottom (part id 2476)... The same wheel that is used for the forward guns... with it's tyre it just sticks out enough to make contact with the the guide rings and reduce the contact friction between that and the rotating section. I figure the rubber in the tyre will take the compression between the sections. That way the technic turntables are still taking the rotation load, but the wheels roll on the guide rings to reduce the friction. It's just an idea at this stage. Not entirely sure if it's viable, and if it is, whether it will work the way it's intended.
  12. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    With the dust settled on exams and some spare time finally at my disposal, I began the search through my spare parts and stocks... 80% of the build available in the correct part type and colours, with another 15% in alternate colours or size combinations. Off to a pick a brick sale tomorrow to grab as much of the remaining parts as possible. What this does mean is that I can start checking the build/instructions... and already, the stand, internal frame and central rotating plating is assembled. This process has actually given me another idea for the rotating section. I'm contemplating using a small wheel/tyre on the edge of the rotating section deck as a 'bearing' of sorts. I'll do a test build of that before I post anything further.
  13. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    Google hosted image should be visible now. 900 pages of raw LPub rendering down to just under 300... with an A4 page of errors and improvements to be made to both instructions and design. I have a workaround for the pan-and-scan/zoom-focus issue, it will just take a little more effort with a few more intermittent steps to produce those steps. The challenge now is creating an overall style theme based on B5 Earthforce terminal interfaces.
  14. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    Colour selected, sub-builds renamed in Stud.io so that they appear in colour when using the fade option in LPub3D. I've been able to shrink 900 pages down to just under 600 (and still have plenty remaining) but the problem now is one of model size and LPub3D's inability to focus on a particular area means that as I progress through the remaining steps, showing appropriate detail is difficult or not even possible. I'd love to be able to pan & scan or select an area to focus the camera on in LPub3D, if anyone has tips on doing that. The other idea I had was to collate the necessary sub-assemblies for each section into their own files and generate suitable step images from those.
  15. Captain_Quinn

    SHIP recreation - EAS Agamemnon from Babylon 5

    Well... a marathon 16hr session later, and the steps are sorted for instructions, with a few parts selection changes and a couple of design changes for stability and buildability. I'm torn between having non-visible pieces as a single hi-contrast colour with a note included saying that those pieces can be any colour, or selecting colours based on suitable build friendly appearance in the instructions. The first makes it easier to focus on the visible parts when buying, but the second option looks better and is easier for overall purchase. Any thoughts/advice?