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Everything posted by Bartybum
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It’s a great parts pack for people starting out. The specialised pieces are just quite boring and sparse - LAs, turntable, portal hubs (yuck) and curved racks. Save for the last one it’s just more of the same.
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Technic 2019 Set Discussion
Bartybum replied to dimaks13's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
@Jim Guess that makes sense, it’s been so long that I don’t remember what the usual convention is -
Technic 2019 Set Discussion
Bartybum replied to dimaks13's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
@dimaks13 Can we name this a speculation thread so the mods don’t get into a tizzy/people don’t take any speculation as fact? -
The reverse steering makes perfect sense to me. There’s nothing unintuitive about it since it’s quite literally the same as driving a car in reverse.
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Technic 2019 Set Discussion
Bartybum replied to dimaks13's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
All I hope is that the tracked loader won’t be too similar in shape to 42032. At that price point I see the potential for a front end loader QuadTrac style. Also I really hope it uses the smaller tread links since I’m in dire need of them. Interesting that the big L1 set isn’t an aircraft like it normally is every second year. Perhaps there’ll be a plane in the 2H lineup. -
This begs the question, why don’t we have part 4185 (thin pulley wheel) with a pinhole instead of an axle yet??? Having a thin pulley wheel that can spin freely would be so helpful with proper compact reeving.
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[WIP] how to create an arc
Bartybum replied to maniacman50's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Oh boy you are in for a doozy of a challenge @maniacman50. I’m so looking forward to this. -
I stand corrected, not much in the way of suspension. I did see a photo with what looked like a pendular axle, but the range of movement would be quite small anyway, so I guess it’s not important for Lego’s model ¯\_(ツ)_/¯
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Just had an idea for an improvement. Double the winch speed somewhere in the superstructure, and make a more complex pulley for the winch.
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They won’t. People want cars to have transmissions because from a functional standpoint that’s one of the only interesting things a car offers, save for suspension and steering geometry. Transmissions are also generally associated with cars in the Technic community and not construction equipment.
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3-stage instead of 2-stage boom, better outriggers, pendular suspension, steering pivot points that aren’t halfway into the chassis, that kinda stuff. It’s not more functions that peeps want, but better versions of what’s on offer. I’m certain that almost all of us realise that there’s only so many functions a crane can have.
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There might be some space if you remove the drivetrain to the LAs.
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[MOC] - 42055 MK 288 BWE
Bartybum replied to Orinoko's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
You’re bonkers @dunes -
Lol us Aussies got it good. Minus goods tax it’s equivalent $45USD here US and Canada get screwed over for it
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It very well may be. There’s always a little bit of play in gears, so the effects of that can be somewhat magnified if the gear meshing involves fewer teeth per second. That being said, it’s far more likely that the weird jitters are caused by the use of a really long drivetrain to power slewing. I see the same happen with heavy slow moving RC MOCs like trucks and cars. They lurch forward, then slow down, then lurch forward again and so on. It’s a product of using long plastic axles to transmit high torque at slow speeds. What happens mechanically is that the input rotates until the torsional energy in the axle overcomes frictional effects, and the output begins to rotate. However, it doesn’t immediately rotate at the same speed as the input (because of intertia), and so even more torsional energy is built up in the axle. What ends up happening is that the output then speeds up until it’s faster than the input, and then due to excess torsional energy in the opposite direction it slows down again. Rinse and repeat. You can replicate that by swinging a weight on an elastic cord forwards and back. It’s a really hard problem to solve using just plastic, and could be minimised by flipping the turntable upside down and driving rotation directly from the superstructure rather back up through a gearbox. You avoid less elastic torsional effects because you have fewer axles.
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