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Everything posted by DrJB
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Efferman's Custom Parts
DrJB replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
No, those parts do not exist. I was simply referring to another lego brand (not in production anymore). In the past, lego made bricks that have the same height as width (these are called ModuleX). Though, lego never made Technic version of the ModuleX, as the latter was primarily destined for architecture studios. These new parts you've made, they kind of fill such gap. -
42030 - Volvo L350F Wheel Loader
DrJB replied to AndroTech's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
On the other hand, it has every PF component you can think of ... well ... except for the switch and lights. i.e., nice collection of spare parts -
Efferman's Custom Parts
DrJB replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
It's essentially a Modulex Technic .... -
[REVIEW] 1H2014 Technic Sets
DrJB replied to Sariel's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I do not have the set (not available in NA yet) but I did order such suspension parts from TLG and got them few weeks back .... and YES, they have more friction than the old suspension parts. -
42030 - Volvo L350F Wheel Loader
DrJB replied to AndroTech's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Sounds to me .... and in keeping with the official picture above ... that one needs to get two sets of such marvel. This hobby is getting expensive. -
Gorgeous! One thing I noticed with such large models is the use of the old style 'full' tires ... is this primarily because of the weight? The hollow tires may collapse under the weight ... correct?
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F1 42000 £66.99 / UK Amazon
DrJB replied to JM1971's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Not fair ... in the US, it's still full price (or maybe 5% reduction) ... But, wait ... I have prime, would shipping be free from France? Edit: I just tried, won't ship to the US ... darn! ... So much for a global company/economy. -
Efferman's Custom Parts
DrJB replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
If I may oversimplify this ... you're essentially asking for the old technic beams, but with 'rounded' ends, and possibly a smaller height ... correct? -
Efferman's Custom Parts
DrJB replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
While I see (and agree with) the merits of the improvements you've made, I think MORE people would be more inclined to purchase a design that is very close to the original lego part ... The 'pull' that such parts exerts (imho) is not as much the need to connect two cylinders and increase stroke ... it's more like to get parts and be able to build an 8275. Lastly, I am not sure what Lego's position is regarding replicating parts that are not 'officially' terminated yet. One way around would be a design with a 'small' improvement ... aka ... the 'China' way. -
Efferman's Custom Parts
DrJB replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
The original part came only in two sets: Dozer 8275 and Crane Truck 8421 ... Since both are no longer available and quite expensive ... people have been building them with spare parts from bricklink .... all other parts are rather common/cheap except such bracket. Incidentally, yellow wheel sprockets are also rare but one can use orange/black. -
[WIP] Pajero Pinin
DrJB replied to piterx's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Very curious about the transmission (gearbox) ... can you post more details? -
Looks rather complex. You can have the same functions with fewer parts and more 'legal' connections ... For example: 1. The lower (small) turntable is there to only transmit the torque to the vertical 13L beam (liftarm) ... correct? If so, why such complicated connection between such turntable and the 13M beam? 2. Also, why are you using 2L flextubes on the upper turntable? Might be better to use part 75535 instead ... 3. What do the bionicle parts do? Transmit torque/rpm to the top turntable?
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- Helicopter
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Impossible LEGO
DrJB replied to Boxerlego's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
That's very easy, you can push on it from the other side ... with something thin/rigid i.e., a credit card -
[MOC] Copper Penny Sorter
DrJB replied to landoandrews's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Nice ... but I'm usually very protective of my legos and I worry that, after a while, the metal will cause severe damage to the plastic- 8 replies
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- Coin Sorter
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Looks nice, but I can't guess how it'll work ... Will have to build it and get back to you. How about all those parts on the floor, planning to use all of them in the contraption?
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Free Wheel and Flex Coupler
DrJB replied to DrJB's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Here's another option ... we often tend to use primarily gears to transmit power, and those are not forgiving in such situations. However, using pulleys and bets (rubber) tends to smooth out the dynamics ... though the challenge there is to use enough belts for the amount of power available. -
Stumbled upon this rather 'different' contraption ... enjoy
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Free Wheel and Flex Coupler
DrJB replied to DrJB's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Very good point, thank you. Now, as you said, if the car is on a slope, you cannot use the motors to stop the car as the free-wheel would disengage ... Thus, you need brakes. Also, a pole reverser is not an option for a free-wheel i.e., if you need to change direction of rotation, you need to do this by mechanical means. I showed the free-wheel to my son and he replied ... looks like a mechanical 'diode', and (by analogy) that's exactly what a free-wheel is. -
Motorised Astromechs
DrJB replied to vmln8r's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Thank you for bringing this up ... I did order motors from TLG (refused to dismantle other mocs) ... and by the time I got them, I had totally forgotten about this ... -
Effe's MOC Corner
DrJB replied to efferman's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Nice ... now, the structure under the boat, is that for support or are those special propellers? I do not recall the name but my recollection is the blades are vertical and they undergo some epicycloidal (complicated) motion ... -
Free Wheel and Flex Coupler
DrJB replied to DrJB's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Yes I did build it and it works fine for me ... I'll try to make a video and post it tonight. Have you looked at the LXF file and made sure you got everything built as I intended? Yes, the middle part IS floating but it can be supported better and that'll make the design a bit bulkier ... nonetheless feasible. Again, the FUNCTION of what I built is VERY different from what piterx did ... on the outside they appear the same, but on the inside they are not. My free-wheel engages in only one direction, no matter how low/high the speed is. The 8t gears in fact force the rubber elements to extend and grab onto the inner side of the wheel hub. In piterx's design, the rubber elements extend ONLY if the RPM is large enough so the centrifugal forces exceed friction ... If the RPM is low, piterx's 'may' not engage. This is NOT a weakness ... this is how centrifugal couplers are supposed to work. Lastly, there still appears to be some level of confusion as to the merits of one design vs. the other ... piterx's design and mine are NOT competing for which is better ... the two have totally DIFFERENT functions: one is a centrifugal coupler, the other is a free-wheel. The coupler engages/works in both directions as long as the rpm is high enough. The other (free-wheel) engages only in one direction, no matter how slow the rpm is. I hope this helps ... otherwise, please ask again. -
Correct ... I had not noticed that he's got only 2 posts ...
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- Helicopter
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