Rascko

Eurobricks Vassals
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    36
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About Rascko

  • Birthday October 30

Profile Information

  • Gender
    Male
  • Location
    Kyiv
  • Interests
    Aviation

Extra

  • Country
    Ukraine

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271 profile views
  1. Just amazing. Really love prototypes - they're bright and are of quite an unusual shape for European cities, but the MOC is even more astonishing.
  2. Rascko

    Lobst3r, a walking robot

    Cool looking mecha-lobster, and a smooth-functioning too!
  3. A few months ago I've got an idea, that I've never seen Lego Technic tiltrotors, which have motorized folding propeller functions (Despite, there were some excellent Ospreys and similar - my favorite are http://www.eurobricks.com/forum/index.php?/forums/topic/62305-moc-mv-22b-osprey-tiltrotor/ and https://thelegocarblog.com/tag/osprey/). So, this is what I've got in the end (sorry for mess on the background, I really don't have other place for photographing something that is ~1m long): Motorized functions: Rotors folding Rotors rotating Nacelles turning Wing folding Rear ramp opening (forgot to take video of this) Landing gear could open and close (the same - forgot to take video + it was not easy to show, as it barely stands w/o support) For keeping blades in position they were folded/unfolded during rotation, I've synchronized axle, which drive folding, to rotation of propeller, using two small turntables per nacelle (really big thanks to user Limga, who provided me this idea). In general, this was more like "proof of concept", that something finished and in future I hope to return to this idea, because lots of issues remain unresolved and could be done better, if designed better and earlier: This monster is heavy. Like 10+ kgs and all the weight is carried by only 3 axes (one in each landing gear leg). It could stand w/o support, but I've used some tires from 42030, just to make sure that axis won't break. Wing folding works poorly. Even big turntable can't properly handle smooth movement. Need to think on more reliable solution. Nacelles' rotation really go non-synchronized under load. I use two motors (one for each) on one output, but it makes them go out of sync just after 2-3 cycles of "up and down". Need to consider separate control, as mechanical linking in such scale will be definitely failed. Controls like elevator/ailerons etc barely works. Need to consider using strings or something like this. Folding mechanism could go disassemble itself, if excessive load will be applied on folding/unfolding. This doesn't seem like a big problem. And some more photos + video (sorry for that "heavy breathing" in the beginning :) ) And the video of wing-and-propeller related functions:
  4. Hmm, why do you need all these actuators and so on there? If you have train remote (I mean this one - https://sh-s7-live-s...d=0&printRes=72) - isn't it possible just to connect levers to actual driverings of a remote with just a couple of bevel gears? Will need some gearing down, but should work. So you will need just two motors per wheel - one for rotating controller and one for drive itself? BTW, I've just got the idea, that I've never considered remote as a valid part of moc for doing something specific. So, there appears very interesting question - what part could be used for connecting to remote channel switch? :)
  5. One more mad idea - I'm not very sure, whether it's possible by Lego pneumatic, - having kind of compressor, that is pumping air into some cylinder with piston, that loses air. The higher is rotation speed - the higher is piston lifted with pressure. But this seems an even more contraption-styled. Spring loading might help.
  6. Just one more scheme of mechanical tachometer, with spring inside - could be used for inspiration of some kind.
  7. It's possible to try something like this: But not sure, whether this could be made compact enough to fit your MOC.
  8. Wow! Really amazing match with this bus face! Still remember these buses from the times of childhood :)
  9. Rascko

    Technic 2017 Set Discussion

    Yes, it's a bit sad - except for a good look, aviation kits are usually good source of parts - panels, beams etc, and I've expected some more white stuff, just to continue traditions of Cargo plane, Fire Plane, last Helicopter etc.
  10. Rascko

    [WIP] Massive Dump Truck

    Try to use some truss-like construction, with diagonal elements, connecting parallel beams. Making triangles like 3-4-5, 7-9-11 or 6-13-14 (every number is a triangle side length in studs) could help you much in creating rigid and strong constructions.
  11. Rascko

    SBrick General Discussion

    depending on what's you're going to build and whether the price matters. It is OK, when you need 1 - i.e. 4 outputs are enough. But when you need many separately-controllable outputs, SBrick seems a better option from the point of "price per output" view.
  12. Rascko

    SBrick General Discussion

    There are three actual approaches:- use profile editor and "sequences". This barely could be called "programming", but could arrange some stuff like "do something in specific order". Unfortunately, lego motors doesn't provide feedback and stuff like "do this after this" could be done only with very precise timing (and pray for that timing not to change from discharging batteries :) - second one is based on usage of Scratch and stuff like it. Might be an worthy idea for somebody (maybe schools or any other educational institutions, as it's more like "programming for non-programmers"), but I don't like it for me - it's something closed and the nicest thing in programming stuff like this is interaction. - third one is usage of "protocol" (https://social.sbric...f-the-protocoll, https://social.sbric...ck-ble-protocol). And here's the best part goes. You can use it from any language/environment, where you could access BLE programmatically). Python should allow this, as it has excellent libraries for everything in the world. Now I'm waiting for BLE dongle to arrive (it's not easy buy one here, still have to wait like month) and going to test stuff both on PC and something like Raspberry Pi - as it's easy to take anything in Python there.
  13. Rascko

    [MOC] Airplane Catapult

    Amazing idea and great implementation. Would be really nice to continue and re-create the whole carrier :)
  14. Rascko

    Building Help for Technic Noobs!

    Thank you so much, this was the idea I was looking for (so simple, but brilliant!)
  15. Rascko

    Building Help for Technic Noobs!

    Yes, several of them :)