Leviathan

Eurobricks Vassals
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About Leviathan

  • Birthday 11/29/1994

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    France
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  1. Hello everyone, I'm pleased to present my latest personal creation: the CFM Group's RISE engine! This is a turboprop engine program known as Open Fan, i.e. without a nacelle enclosing the main fan. This kind of prototype, still at the demonstrator stage, should equip future aircraft by 2025-2030, if promises of reduced fuel consumption are kept! (https://www.cfmaeroengines.com/wp-content/uploads/2021/07/CFM_RISE_Whitepaper_Media.pdf) Like my version of the LEAP 1C already built in 2021 (https://www.flickr.com/photos/147164115@N07/albums/72157718957968196/with/51653430599/), I wanted to propose a standing model version once again with functional and motorized elements. I started the design at the end of 2023 and spread it out over 7 months. The final model is made up of around 1,300 parts, measuring around 20cm in diameter and 30cm in length. The big technical challenge lay in the mechanism for varying the incidence of the main rotating and fixed blades in a single movement, using a lever concealed in the base of the support! Let's see the photos: Technically speaking, to fully understand the concept, we need to distinguish between the "rotating" front fan blades and the "fixed" rear blades. A central mobile made up of 2 cradles is guided in translation by a linkage system. In transit, this mobile tilts all the eccentrically-mounted blades. The trick thing about this mechanism is that, from a single translation movement of the mobile, the front blades turn anti-clockwise, while the rear ones turn clockwise. You'll see, it's easier to understand on video! Of course, the entire mechanism operates when the motor is rotating. In addition to the technical challenge of packing this mechanism into a small footprint, I didn't neglect the aesthetic aspect of the motor to make it recognizable. Some will notice the painted parts on the blades and the nose. For the cylindrical part, which is always tricky to render in Lego, the motor is made up of 1 10-sided barrel using this assembly technique: https: //brick.camp/en/tech/clip-handle-swivel-decagon. In the compressor section, the rotating skirt is also inverted to fit under the conical cowling. Thank you for your reading, I hope you enjoyed it ! More photos available in HD at this link: https: //www.flickr.com/photos/147164115@N07/albums/72177720315475122 Paid instructions are available on Rebrickable: https: //rebrickable.com/mocs/MOC-180038/Levihathan/cfm-rise-engine/#details If you have any comments or questions, please do not hesitate :) @+
  2. Hi guys, here my Bilstein version from 24 heures of N├╝rburgring ! I used some Webrick brick for blue panels :) Thank you @DugaldIC for this creation !
  3. Hello everyone and happy new year 2022 ! Building instructions are now available on Rebrickable : https://rebrickable.com/mocs/MOC-96897/Levihathan/poclain-hc300/#details I've achieved the book with subassemblies sequence : See you soon !
  4. Thank you ! Yes, designers understood how to mix up sport car and Neo-retro style. I read this article (in French) to learn more about the car details : https://www.automotivpress.fr/essai-jannarelly-design-1-une-emotion-francaise/
  5. Yes I created a custom profile in PU app but I don't know how to share it ! Into the app you can mix any kind of hub you want. Here you can see controls. As you can see, you can move the excavator at the same time moving the boom for example. Each joystick has in own motor. You can reverse each motor rotation on the app with number one in red circle : -1 or 1.
  6. Thank you ! Here is the video : I hope you will enjoy it !
  7. Thank you ! I have made some technical pictures to see Poclain HC 300 inside :
  8. Thank so much for your support guys ! I'm working on the video, I hope to release it this week end.
  9. Thank you so much guys ! That's scheduled ! I already tried on my LEAP engine (you can see results here : https://www.flickr.com/photos/147164115@N07/albums/72157718957968196) and I wanted to do the same on the Poclain ! I've made a lot of iterations on this transmission. For example, I added a bridge on 20t bevels gears in order to reduce stresses on gears. This solution split stress path and decrease tooth wear. The DDD is not implement on the real excavator. I added this kind of transmission to create a technical challenge ! Much more difficult than 2 parallels motors but less efficient !
  10. Wow incredible ! Tank you for this technical facts ! Of course yes, very soon. I'm working on a feature to reverse motors rotation by the software just like old PFS remotes. Ahaha yes indeed. You take a red turret and a black drive train you get a Poclain xD Thank you so much guys for your comments !
  11. Hi everyone, Today I want to introduce to you my latest MOC : a Poclain excavator, the HC 300. Poclain is a French company (bought in 2000s by CASE) leader in 60-70s in hydraulics excavators and engines. The HC 300 was the bigger excavator in the world in 1968 ! Specifications : I wanted to control the model with a smartphone so I used Control+/Power up applications. The excavator has also manual features. I used electrical linear actuators instead of pneumatics to enhance playability. The excavator must be able to rise one track from the ground by using the bucket and his motorized arm. Inventory is mainly based on #42082. The main design is based on 8043 set. The drive train is powered by 2 L motors and a dual differential drive : more informations on @Sariel video : https://www.youtube.com/watch?v=f5_OQooBxdY. This kind of transmission allows control by only one joystick one smartphone screen instead of two sliders. Configuration : 6 motors : 5 L motors (https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb0959c01#T=C) and 1 XL motor (https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb0960c01#T=C&C=85) 2 electrical hubs 2 000 parts Features : - Toggling cabin with mechanical locking system - 360┬░ turret rotation : One battery box is placed in drive train and the other one is placed on turret. No cables through the turntable, only a shaft to transmits rotation from drive train to the V12. - Technical compartments : a lot of openable elements very useful to store tools and tracks components. The grid at the back can be opened to reveal V12 engine. - The entire bodywork is removable. It is only set on the turret by gravity. The entire of the excavator is modular in order to make disassembly easier. - V12 engine works when the excavator move. I add a maximum of details to make it more realistic. - The dual differential drive : Each motor drives one kind of motion, straight-line motion or rotation. Get more information here : http://groups.csail.mit.edu/drl/courses ... ldiff.html. You can also combine motions to get curved directions. Tension on tracks is maintained by springs. Originally made by @Anto : https://www.techlug.fr/Forum/viewtopic.php?f=5&t=11548 Inspirations : https://rebrickable.com/mocs/MOC-1312/yannmar/motorized-hydraulic-excavator/#detailshttp://www.techlug.fr/Forum/viewtopic.php?f=5&t=11548http://www.techlug.fr/Forum/viewtopic.php?f=5&t=11878&p=192932&hilit=excavatrice#p192932https://www.techlug.fr/Forum/viewtopic.php?f=5&t=11343&p=185867&hilit=excavatrice#p185867https://rebrickable.com/mocs/MOC-19850/Mowlwurf/42006-full-rc-mod-undercarriage-with-transverse-subtractor/#comments Conclusion : The video will come soon ! Building instructions too ! I hope you liked this creation, I tried to mix up realistic details and common excavator's features. Only displacement is slow because of a total weight of 2kg. HD pictures here : https://flic.kr/s/aHsmVM6rX2
  12. 5: 10 20: 6 6: 4 25: 3 7: 2 27: 1 Congrats everyone !
  13. Hello, HD building instructions are now available on Rebrickable : https://rebrickable.com/mocs/MOC-57003/ Or on my Google Drive : https://drive.google.com/file/d/1qCLnkHyojcZK08G7hv7q0Wvgc6o_TFVg/view?usp=sharing I fixed some minors mistakes/inconstancies in the file. I also improved gearbox in order to make it more realistic. Ratios are same. I updated part list on Rebrickable (Minors modifications). See you !