Hello!

I was wondering if someone could look into 4526. It's not quite right. There is some overlap, making it out of system.

The unresolved issues with duplo bricks 11344, 70676, 70683, and 11169 seems to be the orientation. The rules for orienting duplo pieces are not as clear as with regular lego. A good example of the differences is duplo part 3664 and its equivalent regular lego part 49307. As there now are certified duplo slopes in both orientations, this calls for a deeper investigation.

Figure shows 3664 and 49307.

  doubly curved slopes.png (Size: 8.83 KB / Downloads: 38)

A slope is defined as a brick having less or more width at the top than at the bottom. This includes straight slopes, curved slopes, and inverted slopes.

Regular pieces tend to have the slope in the negative z direction. This applies to 'inverted', 'slope', and 'curved' pieces. A few exceptions exist:

• "regular inverted" in the wrong direction (slope in positive x direction): 18653, 30099, 78666.
  
• "regular slope" in the wrong direction (slope in positive x direction):  45411, 45204, 45410, 54095, 54096, 1942.
  
• "regular curved" in the wrong direction (slope in positive x direction): 6183, 6184, 6215, 4744, 6216, 6214, 30075, 54097, 11290, 11301.
  

• "duplo inverted" in the negative z direction are: 11169 (unofficial).
  
• "duplo inverted" in positive x direction are: u977(2x3) to have it in the same orientation as the two-sided arches, 2301 (2x3), 98224 (2x4), 98252 (2x3), and 4198 (2x4). Here, the longer dimension rule is given precedence over the slope rule.
  
• "duplo curved" in the negative z direction are: 11170 (2x2), 11344 (unofficial), 70683 (unofficial).
  
• "duplo curved" in the positive x direction are: 98252 (2x3), 2302 (2x3), 98224 (2x4), 98223 (2x4), 31213 (2x4).
  
• "duplo slope" in the negative z direction are: 63871 (3x2), 35132 (4x4), 31170 (4x4), 6474 (2x2), 70676 (unofficial), 15580 (3x2), 49570 (unofficial), 35114 (3x2), 29303 (4x2).
  
• "duplo slope" in the positive x direction are: none
  

1. any duplo piece with a curved slope (both convex and concave, inverted or not) is oriented with the slope in the positive x direction (for clarity, this includes arches)
   
2. any duplo piece with a straight slope is oriented with the slope in the negative z direction (there are currently no pieces having inverted straight slopes, but they are expected to be here)
   
3. the longer side is oriented in the positive x direction
   

• unofficial parts 70676 and 70683 can be certified in their current orientation (straight slopes in z-)
  
• unofficial parts 11344 and 11169 must be rotated before certification to yield curved slopes in x+
  
• certified part 11170 must be rotated to adhere to these rules and have its curved slope in x+
  
• certified parts 98223, 2302, 98252, 98224, 3664, 4198, and 2301, all having curved slopes in x+, can remain as they are
  
• certified parts 6474, 63871, 35114, 29303, 35132, and 31170, all having straight slopes in z-, can remain as they are
  

Hello,

The patterns of the printed parts are probably also available in the Lego app.
Does anyone have experience of how to get these patterns? I mean how I can copy these patterns from the app.

Greetings

Manfred

anyone know the angle of the arm bar

Attached Files

  image.png (Size: 8.2 KB / Downloads: 60)
  wip.dat (Size: 98.05 KB / Downloads: 0)

Currently, the stud8.dat primitive (Duplo hollow underside stud) results in a too thin cylinder. Widely used, yes, but the thinness leads some parts authors to use the stud4.dat primitive instead. The stud4 primitive produces a cylinder wall thickness comparable to the 4 LDU of most walls. Compare e.g. the undersides of 15515, 98220, 31066, and 15516.

The real parts have most curved walls slightly thinner than the 4 LDU of rectangular bricks, whereas the underside stud cylinder walls are even thinner, but not as thin as the current stud8 primitive.

What do you think about updating the stud8 primitive to having a slightly thicker wall? Perhaps 3 LDU instead of the current 2 LDU?

   

Join me in welcoming new parts author Peter Blomberg [WUIt]

Please support them as they start their LDraw parts author journey.

The 2024-09 LDraw Parts Update has been released. This update adds 593 new files to the core library, including 405 new parts and 15 new primitives.

Thanks are due to all the part authors who created or corrected parts for this release. The small, but dedicated, band of reviewers also play an important role in keeping files moving through the Parts Tracker and deserve just as much credit. This update wouldn't have been possible without their dedication and attention to detail.

This update starts our roll out of full minifig torso shortcuts.

You can preview the new parts in 2024-09 here, and download the zip-file update or Windows install package here.

Thank you to all the testers and parts authors who continue giving feedback on the new PT software. This project would not be what it is without your help.

Orion Pobursky
LDraw.org Parts Library Admin

Hi,

I have developed the first-ever web-based building system for LDraw bricks. I would like to get in touch with any members of the steering committee, if possible.

Thank you!

Attached Files

Thumbnail(s)
   

Hey guys could someone please add this wing piece to the parts list? I really need it for some IG posts 
Bricklink code: 5684



Video for reference if needed:
https://www.youtube.com/watch?v=_fyDJK7yyIM
(from 4:54 to 5:39)
https://www.youtube.com/watch?v=EPg7CWLrLHo
(from 8:14 to 8:56)

Hello, i modeled the baseplate 4x20 for the buildable ruler sets, but didnt find an official part number...
https://www.bricklink.com/v2/catalog/cat...=7#T=C&C=7
https://rebrickable.com/parts/upn0006/baseplate-4-x-20/
https://www.brickowl.com/catalog/lego-baseplate-4-x-20
or should i use an u-number? (@Orion: which one?)