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Everything posted by DrJB
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42043 Mercedes-Benz Arocs 3245
DrJB replied to AndroTech's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Just wondering: With the new LONG pneumatics, does this mean the cylinder brackets on 8275 and 8421 won't be sought after anymore? Also, and from the pic in post #144, the turntable appears to have a diameter of 9L vs. the current at 7L (with 56 teeth). This suggests the new turntable has 72 teeth. (56×9/7=72) Sweet! -
The Town Square somehow reminds me of the 'Public Transport' from few years back.
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In all such types of machines, isn't the cab supposed to be on the left side? Or is that the UK/Australia/HK version?
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Newbie help wanted
DrJB replied to Perterz's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Looks like it should work. I do not have the 2L rack and I'm assuming it can slide on the studs. If not, you might need something different (#2 below). Other than that, you may need some small changes: 1. Swap the 12 and 20 teeth gears. You want to REDUCE the speed coming from the motor (not increase it) 2. The gear rack is fixed and cannot move side to side. You need to modify that part and make sure the rack can slide left-to-right. 3. You are using 4 connectors and 2× 3L axles to connect the 5L liftarm holding the motor to the 2 bent liftarms. You should replace with 5L liftarms instead, for much more sturdy assembly. Edit: It looks like this mat not work as the 5L is not long enough, and in your contraption the 3L axles are not pushed all the way inside the connectors. ++ = Also, the 2L rack you're using is a very rare part. Unless you have it, you might be better off using some of the more common racks. -
Lego worst failures by Lego Designer Mark Stafford
DrJB replied to Ondra's topic in General LEGO Discussion
I can accept the fact that some product lines were not 'popular', such as Scala and Galidor, but the statement that the plastic tubes (fiber optics) were more expensive to produce than the set sold for seems rather stretched. As for Znap, I think what did not help it was the fact that the box art was ugly. Let's face it, we're attracted to toys first and foremost by the pictures on the box, and unfortunately Znap did not have that benefit. It's interesting that, if you look closely, some of the current technic liftarms have 'evolved' from znap parts. They brought them back with the spybotics series. Here is a simple comparison: Lego 8456 Fiber-Optic Multiset MSRP - $74 Lego 3806 Gigamesh G60 - $60 I find it very hard to believe that 8456 cost more to produce than 3806. 8456 is put together with primarily plastic parts only. 3806 included a brick that for sure cost a lot to assemble. Were the fiber optics more expensive than the electronic bricks? Anyone else sees the 'apparent/failed' argument? -
42043 Mercedes-Benz Arocs 3245
DrJB replied to AndroTech's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
This may have been discussed already but, do I see longER pneumatic cylinders? Also, do we have a list (with pictures) of all the new parts? -
Very critical ... I guess you never had bad ideas of your own? It only takes a knowledgeable/experienced engineer to 'appreciate' the complications/challenges behind putting such vehicle together. I assure you, besides the pride and joy (and frustrations), that achievement is very 'humbling' to all those who got involved with such project. ;)
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Model Team: Roddin
DrJB replied to Perterz's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
NIcely done. Few weeks ago I asked if one can do hypoid gears with the current lego assortment of parts and it seems you did just that, for the steering mrchanism. Does it have 'perfect' meshing in both directions or do teeth tend to skip now and then? -
Problem with Parts Cracking
DrJB replied to therealjustin's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Nothing unusual does not make it 'ok', as we all expect 'infinite' life from our toys. I've had other parts crack, just sitting/assembled, such as the 4L thin liftarms on the Technic Shuttle. Not one, but ALL of them. For sure the choice of material has got something to do with it. Lego uses some 'softer' plastic for other colors/parts, such as the new gears and all the pearl light gray parts. You'd notice that the new gears all have less friction (clutching power) on the axles. You would expect TLG, with the many years they've got with experience in plastic not have such issues but, it seems difficult to balance clutching power (friction) vs. durability (not cracking) vs. ability to use different colors (why grey crack and others don't) vs. the other many performance criteria. Any 'mature' engineer can appreciate the challenges with multi-objective performance optimization (aka performance conflict). The good thing is TLG does replace cracked parts (for now at least). -
[CONCEPT] Borderlands 2 Runner
DrJB replied to derpydragon's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
don't give up yet, this looks like such a neat MOC. if it were easy it would not be fun. Wait a bit and gather more ideas from other EB members. -
isn't the Horizon Express a replica of the French TGV ?
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[CONCEPT] Borderlands 2 Runner
DrJB replied to derpydragon's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Did some web searching and the first image looks very realistic, but it's not. http://romagfx.devia...lands-206879904 I was hoping it was from a die-cast model and that'll it'll look good displayed. I was wrong :( PS: Some of the renders on that site rival with those from BlakBird -
[CONCEPT] Borderlands 2 Runner
DrJB replied to derpydragon's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
You have at least two options to transmit power from the motor to the tire. 1. Somehow with gears or a chain, directly from the motor to the axle of the tire/wheel 2. By friction, where the motor spins a small tire, and that tire rubs against and spins the larger tire. I can mock up some LDD if needed. -
[CONCEPT] Borderlands 2 Runner
DrJB replied to derpydragon's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I've been 'thinking' about such wheels (in the original post) and really, can they steer the vehicle by just tilting? Pivoting the tires will change the camber and while it may cause 'small' steering, not sure it'll be very effective. On motorcycles, one steers by leaning on either side, and the mechanism that does the steering is the fact that the bike's CG (center of mass) causes a moment that tries to tilt the bike. To prevent the bike from falling, the bike has to follow a curve so that the centrifugal force counters the moment that's trying to tip the bike. In the above vehicle, when the two tires tilt, they do not affect the position of the vehicle's CG ... or am I missing an important point? -
[CONCEPT] Borderlands 2 Runner
DrJB replied to derpydragon's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Very Nicely done. Did not know of the borderlands games, but just checked and many slick vehicles there, if MOCked properly would certainly qualify for cusoo. -
LOL ... that was exactly what I was thinking. If your priority in life is Lego Happiness, move to Denmark ;) but careful, most hobbies last about 2 years only, so you'll be moving on a regular basis.
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Disappointed Lego Customer Service - Order cancelled
DrJB replied to m3eu's topic in General LEGO Discussion
For sure there are many who disagree on here and that is their fair right. My point is/was that you'll always find similar situations whether with TLG or any other company ... instead of letting such inconvenience get to you and cause you blood pressure to hit the roof, do this the old fashioned way: pick up the phone and call someone live ... This is a HOBBY people, and NO, I refuse to lose sleep or get stressed about it. Go ahead and complain all you want, if that's your way to help you 'heal', by all means. As for me, I'll look into alternate ways to find what I need. *peace*- 16 replies
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Disappointed Lego Customer Service - Order cancelled
DrJB replied to m3eu's topic in General LEGO Discussion
it might be very well that their web page ordering system is not on par with their actual stock, but not sure u can blame them. In these modern days most companies outsource their IS and unfortunate such events do happen. your best bet is to call and talk to someone live. I'm sure they'll find a way to make you happy ... somehow.- 16 replies
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I think Chicago always has a record number of attendees/participants. The main reason for this is that Chicago is 'centrally' located, and within relatively easy reach from all corners of the US/Canada. Also, there are 4 Lego Stores in the Chicago area (downtown, NorthBrook, Schaumburg, Orland Park). I've been to the last 3-4 BrickWorld events and was quite pleased. Now, besides Chicago (fairly large city, a lot to see), there is not much else around. PS. I might be a bit biased as I do live in Chicago.
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