42

All Aboard! I'd like to add my all-time favorite LEGO piece: x870cc02, THE BLACK WHISTLE! The white brick is a microphone. Attach it to your train's motor and BLOW THAT WHISTLE! Depending on how short (or LONG!) your whistling was, the train would go forwards or backwards. Real-world use: Not only did it drive your train round the bend, but your ...


27

Ø is a pretty standard notation for diameter. So w/Ø 3.2 Shaft means the item has a shaft that has a 3.2(mm) diameter.


25

Usually, the LEGO group doesn't seem to have much organisation, at least in the past. That's why you can find sets with two different numbers, or two different sets with the same number. Now the keyword here is seem, as I suppose there was some logic to it even in the past. But nowadays there is some logic, and even if not all of it is understandable, you ...


22

One of the smallest pieces is the detachable handle on the 1 stud gear shift element. The black part in this complete lever:


21

The screwdriver is also very small, but I'm not sure it beats the lever handle. Also, one could argue it has to be detached from the tools wheel first. But if you buy second-hand lots, there's a good chance it would be detached, and it would easily escape through small holes. Similarly, the various plumes aren't very large either:


21

The ridge is there to make the base the standard 5LUs wide (see also "What is an Erling Brick"), enabling it to accept the standard stud. I believe the rest of the brick was thinned out so that the combined "depth" of the Erling brick and a 1x1 plate (its common usage as a headlight) was the same height as a standard brick. From the HoMa's World of Bricks ...


21

The studless have SEVERAL advantages over the studded design especially when you want to include moving parts. Just the clearances between connections is important. Sariel sums it up in his book well. He says there are advantages to both systems (stud-full, for example, are more rigid) but the fact that the stud-less look more realistic and, of course, the ...


20

In most cases you can find the weight of a brick from Bricklink an unofficial LEGO site that takes weight measurements from user submitted data. Bricklink states the 1x4 brick as 1.64 grams in weight. LEGO bricks tend to be odd weights because the design process primarily focusses on the physical aspect. A 1x8 and 2x4 brick both have exactly eight studs, ...


19

As said, this is the point where the injection happens, usually known as a gate. Sometimes, LEGO tries to have in a non-visible place, but the process of moulding is extremely complicated and forces specific requirements on the gate placement which mean it's sometimes impossible to hide it. The basic rule of thumb is that the gate is usually near the center ...


19

I believe the main reason is so that the pieces are easy to identify in the instructions - as many LEGO sets don't have the Technic style "List of elements used in this step" it's always a fun game of "Spot the difference" to see what's changed: If those pieces were all red, then the target audience (5+ on those sets for example) might find it very ...


19

These pieces are frequently used for decoration now, but they were originally used for sliding doors, particularly on train sets. Here's one of the first uses from set 7838 in 1983: While they could be used in structures, these were frequently used for putting doors on the train cars themselves: These parts can also be used to create tracks for other ...


19

The holes in Lego Technic work very well as holes. By which I mean, I have built very successful motor-driven cross slides for small machine tools using Technic pieces. When paired with nominally 4.8mm metric ground rod (which tends to have a negative tolerance) the 4.8mm holes are a nice sliding fit. Imperial 3/16" rod at about 4.76mm also works, but is ...


17

I had guessed that smallest piece I have owned is one of these (image courtesy peeron): It really is stupidly small (so small that I've lost the only example that I possessed). However, I have since discovered that the lever weighs less, and that the screwdriver will fit through smaller holes. Update: I've recently come across some of these: It's an ...


16

These aren't defects, they're a scar from the moulding process, it marks where the plastic was pumped into the brick. It's more noticeable on some bricks more then others, every brick manufactured this same way should have a similar mark.


16

One obvious answer is all components of the power functions family. Lights can be used as lights, motors can be used as motors.


16

There are two variant of that, which look very similar: Stud.IO lists them as: Brick, Modified 2 x 4 - 1 x 4 with Recessed Studs and Thick Side Arches Brick, Modified 2 x 4 - 1 x 4 with Recessed Studs and Thin Side Arches These can be seen below, thick in red on the left, and thin in blue on the right in the top picture (not a valid colour): The ...


15

The regular connector have simple angles which are multiples of 22.5°. #4 is 45°, #3 is 22.5° and #5 is 67.5°. That's pretty boring stuff, but there you go. The 53.5 angle isn't as bizarre as you would think and there's a very good reason for it (and less boring to me, but YMMV). That reason is that it forms a Pythagorean triangle, and specifically the ...


15

It's difficult to tell exactly what part this fragment came from, but it looks like it is part of a broken Technic gear or pulley. It looks like it probably came from 3736: Your fragment looks like it was probably once one half of the center axle hole of that part. In terms of repair, I suppose you could try to glue this back together, but given that the ...


15

I once published a paper in a peer reviewed scientific journal using data gathered using a remote translation stage constructed from Lego Technic. I could only get ~ +-1mm accuracy out of it, where the proper stages were more like +- 0.1mm, but it was good enough for a proof of concept and the proper stages were on back order. Of course many people would ...


15

Minifig accessory "shovel" can be used for dispensing minute amounts of a powder. Urban legend attributes such usage to drug dealers. The fact that amazon lists digital pocket scale (0,1 g resolution, 100g max) and an airtight container as "frequently bought together" hints it's more than just a legend and LEGO shovels are indeed used in this way.


15

Picture little blurry, but this is what I see... The builder attached the tiles to Part Number Forty-Seventy. Part #4864a, the (black) window piece is really trans-black in color, but the way it's used here, with it being reversed and all, obstructs the proper identity of the white 1x1 bricks, causing some viewing tricks on the eyes...


14

There's a YouTube video which explains how you can replace the battery in that light brick. You can also find the owner's explanation on the Eurobricks forums. Quoting from that site: What you'll need: ExoForce Light brick (obviously) A small screwdriver (or other item with a long, thin shaft) (my s'driver was 2mm (0.07 inches) thick) A ...


14

For the short answer, Duplo studs are indeed taller than twice the height of a Lego stud. And don't rely too heavily on measurements you get from ldraw (and not just for Duplo). For a really long-winded history on this... First, note that when I authored the original Duplo parts I never actually measured them with a ruler or calipers, as there was no need....


14

I think the most important aspect is a matter of geometry. With studded beams, you're constrained by the form factor of the regular LEGO brick, which isn't a cube but a 5:5:6 cuboid. This means that every time you need to change the orientation of things, you'll have to think about how you're going to do it, and use plates and whatnot between beams. It's ...


14

The full-base 1x1 round bricks were produced from 1955 until 1963, during the period when LEGO pieces were made from cellulose acetate (CA) plastic, but were sold until about 1966. According to Gary Istok's Unofficial LEGO Sets/Parts Collector's Guide the solid-stud full-base 1x1 round brick was only ever made from CA plastic. After the supply of them ran ...


14

Although I can't think of any sets that make use of this technique, I have found that the Slope, Curved 4×1 Double No Studs fits perfectly under the new-style arches.


14

In addition to what jncranton wrote, the plate with the rail is a perfect fit for sliding in the brick with groove: You can see an example of that technique in the Cloud City set:


14

This is a Minitalia brick - Lego produced different bricks for a while in the seventies for Italy (per Gary Istok's latest information: because the original LEGO was deemed too expensive). Minitalia bricks have weaker plastic (which shows on the studs on your brick) and don't use the Tube system underneath the brick, but an older patent which has the X marks....


14

The Travis Brick is the 1×1 brick with studs on four sides. The nickname arose amongst LEGO Space builders. It was nicknamed The Travis after talented Space builder Travis Kunce. He liked the part so much he had a tattoo of it. The brick is especially useful in SNOT techniques as it has studs on all but the bottom surface.


14

According to the set designer for the Paranormal Intercept Bus set, Niek van Slagmaat, the released product contains 3 references in total, which he identified in a presentation at BrickFair Virginia 2019. You can skip ahead to the 22:43 time to hear him talk about the sticker sheet and the references it makes, which are listed below. Rock Raiders icon ...


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