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Everything posted by Bartybum
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This is not a story thing, it’s a grit and thematic thing. Despite the fantasy alien elements, Avatar has a pretty distinctly harder, more violent and realistic feel to it akin to Aliens than Star Wars, which is magic space wizards and bright flashy lasers. Especially when the vehicle in question is a dark green helicopter with guns dripping off it like an Apache.
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42146 - Liebherr LR13000
Bartybum replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I like my coffee like i like my ladders - with a billion single failure points -
That was far from cylindrical though, it was a rounded rectangle: There's a bit of a hop skip and a moon landing between a cargo plane and an airliner. A Beluga would need to be properly circular and smooth at the same time, which would be very difficult to do without lots of new circular panels. The front bulge would be extremely hard to replicate nicely with Technic panels too.
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That's three three-output gearboxes. That's quite a lot of real estate to take up :S Have you considered having two modes instead, with outriggers bound to the gearbox? I've said this idea somewhere up here a while back but I'll repeat it: Front loader mode: Drive Arm Bucket Backhoe mode: Slew Boom Stick Bucket You could then have steering either as an independent function with a sixth motor to avoid issues with slack as you mentioned, or you could have it as a fourth function in the front loader mode. If you're worried about slack then you could also use actuator steering for greater precision. Good thing about this solution is that you consolidate the outriggers into the gearbox itself, rather than needing a whole other gearbox for them. You could gear down the rotary changeover catches so that when your outriggers are up the catches are in driving position, but when they're down the catches are in backhoe position. You might have some issues with immense torque acting on the gearbox but you can implement a linear clutch (god bless that piece holy shit it's fantastic) somewhere in the drivetrain. Another good thing is that instead of having three separate three-output gearboxes, you'll have four two-output gearboxes, the complexity of which might be greatly reduced to give you a bit more space.
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42144 - Material Handler
Bartybum replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Idk lol, I was just correcting an incorrect statement -
42144 - Material Handler
Bartybum replied to Ngoc Nguyen's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Given it's a perspective photo, it's far too large and at the wrong angle to be sitting on the ground. It is indeed hovering -
Motorized ladder - can't discount it as a function for a front loader if it's considered a notable function for a bulldozer But in all seriousness, I agree, but only if you only have space for one hub. A front loader needs all four functions to be operable at the same time, so you can't have a gearbox, or any more motorized functions without adding a second one. If you do, however, then there's quite a lot you could do, such as a locking mechanism with PTO for different attachments (closing bucket, claw or forks), or even a completely different style of arm, like the telescoping one on the Torion 738T Sinus. If you're willing to sacrifice some playability by getting rid of simultaneous functions, then this could even be achieved with four motors and a four-output distribution gearbox. While expensive, a 3-4K piece model of this with CLAAS tyres, two hubs and seven motors (2x drive, steering, arm, telescope, 2x attachment) should be entirely achievable, and would be awesome... damn now I've really hyped myself up about this lol