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Everything posted by Hrafn
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Ideas for MOCs
Hrafn replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Piterx has a couple of designs, both partially described in the forums here. The first was for his Lancia Fulvia; the second was for his Pajero Pinin. I can think of at least one other approach, but can't find the link to it now; basically the designer used the classic 4-speed Lego gearbox and coupled the tops of the gear selectors with a 6571: . He then used a series of cranks to activate the selectors in sequence; the 6571 ensured that when one selector was thrown, the other one would return to neutral. I realize that's not the clearest explanation but hopefully it gives you some idea. -
Gears, most wanted
Hrafn replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Both of those look great! I hope the first ones are strong enough to withstand meshing forces. The helical gears look great, too! The guy who made the other helical gears you linked to has used them in a Torsen, but it still looks a bit larger than I'd like. It may not be possible to go much smaller, though. -
Small tank suspension
Hrafn replied to bekesizoltan's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
That's very clever! I wouldn't have thought it was possible in that scale. -
Ideas for MOCs
Hrafn replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hey, this is the Technic forum! The payload is clearly Classic Space, from the color scheme and boxiness -
Gears, most wanted
Hrafn replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I'd love to see parts for a true Torsen differential using helical gears. -
The number (36 or 34) should refer to the width of the tire in mm. EDIT: The letters (more or less) match the speed rating on real-world tires. The tires with the same letter also tend to have very similar tread patterns and aspect ratios (height/width ratio); the one exception is the Unimog tires, which are "R" but are narrow with a tall sidewall and truck-style flat tread. Confusingly, not all tires have the letter in their Bricklink description. R: 170 kph H: 210 kph VR: > 210 kph Z: > 240 kph ZR: apparently the same as Z for real-world tires R: H: VR: Z: ZR:
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Would either of these work better? (wheel 68.8 x 36 H) (68.7 x 34 R) I think what you're using now is (68.8 x 36 ZR) All of these tires have similar outside dimensions so hopefully you could swap them out easily. The top two will look smaller, though, since they're balloon tires instead of racing slicks. The Bricklink page I used to find them is here, and Sariel also put together a page on wheel sizes here.
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LEGO Unit Converter
Hrafn replied to Sariel's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Perhaps they should use it for that - it's been an issue for NASA before. -
[MOC] Ursus C360 3P
Hrafn replied to eric trax's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Such an extraordinary attention to detail! This is a stunning build aesthetically, and the functions are great. I love the pushrod (?) steering. -
Explorer Paddle Boat
Hrafn replied to Sariel's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
All the way down! I wonder how fast this would go with RC motors (and suitable shielding to prevent the splashing water from shorting them and the RC unit out). -
2.28 m tall Crawler Crane
Hrafn replied to Sariel's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I stand corrected. Very cool! I'm sorry to hear about your hamster. -
2.28 m tall Crawler Crane
Hrafn replied to Sariel's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
What, no hamsters? Seriously, though, this is really neat. I like the extending tracks in particular. Not realistic per se but novel. -
Excellent! I really like the way you made it modular and paid so much attention to how the chassis looks, even though it's not visible when the bodywork is attached. I'd love to see more detailed photos of the door hinges to see how you solved that challenge.
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Mitsubishi Pajero Pinin
Hrafn replied to piterx's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Great work as always! I'd love to see more detail shots of the finished gearbox and selector mechanism. Has it changed much from your initial prototype? -
Gears, most wanted
Hrafn replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Or the angled beams (which are at atan(3/5) or about 53.1 degrees) or the tri-liftarms (and wedge belt wheels) at 120 (and 60) degrees. 1/2 stud offsets aren't too hard either. Studs are 8mm, but bricks are 9.6mm tall and plates are 3.2mm. Between all of those tricks, I've found good meshing geometries for most gear pairings and have candidates to try out for some of the others. Whether these solutions are practical is another matter... -
MOC: Rapid Tracked Vehicle
Hrafn replied to Milan's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Haha, nice! Excellent climbing angle you have there. I hope the pilots take their motion sickness pills though! -
Gears, most wanted
Hrafn replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Why won't a 1.5 stud offset work? One way to do it is these two next to each other: . Or you can use parts like these , suitably spaced on an axle and reinforced so that they don't slide on the axle due to meshing forces. -
Effe's MOC Corner
Hrafn replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
and are both very cheap on Bricklink - $.01 or so in the US. There are a few others that might also be useful; I know I've seen people use the last of these in Technic creations. -
ERF E12 Skip Loader
Hrafn replied to Makorol's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Slick! It looks just like the real thing, all the details are beautifully done. -
Trophy Truck
Hrafn replied to gsia17's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Beautiful - and such great performance! It's amazing you got it to drive so well and so fast with 2kg of weight and Unimog tires. -
Mini Baja Truck
Hrafn replied to unimog123's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
You're not kidding! I didn't count studs before but now I see you really don't have any free room at all. The only possible solution I could think of would be to raise the rack up a bit, maybe inverting it and driving it from below, but the space in the front is so limited it seems unlikely to work. -
Piagio Ape
Hrafn replied to legotexnix's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Nope, thanks for letting me know about it - somehow I'd missed that one on his site. -
Mini Baja Truck
Hrafn replied to unimog123's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Very nice! Good clean looks, and it looks like it has good weight distribution. You mention on your site that the front wheels have too much toe out. It looks like maybe a narrower rack would fix that, but it's hard to tell since the rack is hidden under some of the chassis structure. -
Piagio Ape
Hrafn replied to legotexnix's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Nicely done! An iconic vehicle that I don't think I've ever seen done in Technic before. Yellow actually seems fitting since the vehicle is named "bee."