Unofficial File parts/2904.dat
part image
File Header:
0 Technic Brick  2 x  2 with Motorcycle Steering Head
0 Name: 2904.dat
0 Author: Guy Vivan [guyvivan]
0 !LDRAW_ORG Unofficial_Part
0 !LICENSE Redistributable under CCAL version 2.0 : see CAreadme.txt

0 !HELP Angle of rotation : 15.5546 degree
0 !HELP Axle of rotation : Y=10  Z=-40

0 BFC CERTIFY CCW

0 !HISTORY 2010-04-05 [PTadmin] Official Update 2010-01
0 !HISTORY 2020-07-07 [Sirio] Updated primitives, studs orientaton, pin connection, T-junctions

0 // Primitives
Status:
Needs more votes. (CF)
Size: 21855 bytes
Reviewers' certifications:
MagFors=certify
UR=novote
Required (unofficial) subfiles:
(none)
Related (unofficial) subfiles:
(none)
File reviews and updates:
At Wed Jul 8 20:30:01 2020, the file was initially submitted.
Submitted by: Sirio
At Wed Jul 8 21:35:01 2020, the following review was posted:

Reviewer: MagFors
Certification: novote
Comments:
Some edge lines are lost.
What do you mean with "Updated subparts"? Theres no subparts used in this file.

Think you should fix the technical issues in the part aswell.
These are wrong:
1 16 0 8.907 -81.217 0 0 -2 -0.536313 0.963375 0 -1.92675 -0.268157 0 1-8ring4.dat
1 16 0 -10.36 -75.853 0 0 -2 -0.536313 -0.963375 0 -1.92675 0.268157 0 1-8ring4.dat
Should be re-shaped.

At Thu Jul 9 23:05:01 2020, a new version of the file was submitted.
Submitted by: Sirio
Comments:
Made other improvements:
turned the studs 180 degrees because the logo was turned back to reality;
enlarged the area of the pin connection to avoid interference;
reduced the use of the rings around the inclined holes.















235/5000










Existing certification-votes were deleted.
At Fri Jul 10 07:10:01 2020, the following review was posted:

Reviewer: MagFors
Certification: hold
Comments:
All good improvements, but the 1-8 lip is still too long, on the inclined hole. It should be cut.

2 14 0 6.7618 -88.924 -5.680399 6.761899 -88.924028
2 4 -8 6.7618 -88.924 -8 8.6885 -89.4602
2 14 -5.680542 8.6885 -89.4602 -5.680399 6.761899 -88.924028
4 12 -8 6.7618 -88.924 0 6.76176 -88.924 0 8.6885 -89.4602 -8 8.6885 -89.4602
The yellow lines should be the correct lines. This should be made both on the top and bottom hole.

At Fri Jul 10 22:20:02 2020, a new version of the file was submitted.
Submitted by: Sirio
Comments:
Made the change.
There are probably some faces too much due to the use of the two cylinders:
1 16 0 18.541 -83.898 -10 0 0 0 -7.707 -2.68157 0 2.14525 -9.63375 2-4cyli.dat
1 16 0 10.834 -81.753 10 0 0 0 -1.92675 -2.68157 0 0.536313 -9.63375 5-16cyli.dat
which could become a 5-16 high 10 and a 1-8 high 8.

Also in the flat face I used a ring3 and a ring4 to connect with the cylinders, perhaps it would be better to use a ndis for the internal surface and 1-8chrd for the external one.

Existing certification-votes were deleted.
At Sat Jul 11 12:10:02 2020, the following review was posted:

Reviewer: MagFors
Certification: hold
Comments:
I would prefer a solution without surface bleeding.

I would also like to see a different description, but I don't know what would be best.
I think the correct technical term is Head Tube, but there's not much "tube" on this part.
https://road.cc/content/feature/bike-geometry-101-learn-why-frame-angles-trail-matter-267512
Maybe something like :
Technic Brick 2 x 2 with Motorcycle Head Tube Pivot Point

At Mon Jul 13 17:35:01 2020, a new version of the file was submitted.
Submitted by: Sirio
Comments:
Changed description.
I fixed the front area, some problems remain viewing the part with LDView.
To further improve the design, it is probably convenient to move the pivot into a subpart with Y axis parallel to the steering axis and import it into the main part with the correct incliantion.
Existing certification-votes were deleted.
At Thu Jul 30 15:30:01 2020, the following review was posted:

Reviewer: MagFors
Certification: certify
Comments:
I think it works now. We have the same issue in many technic parts with a similar design.
It might be better to use longer cyli primitives like the old file had.

You could add 2 x 1-16chrd to close the mesh in hi-res. Like this:
1 16 0 -10.36 -75.853 0 -.268157 -10 -2.681567 -.928092 0 -9.633753 .258336 0 1-16chrd.dat
1 16 0 8.907 -81.217 0 .268157 -10 -2.681567 .928092 0 -9.633753 -.258336 0 1-16chrd.dat
At Wed Sep 23 20:40:01 2020, the following review was posted:

Reviewer: UR
Certification: novote
Comments:
...wating for Guys access to cert here (High resolution)

At Wed Sep 23 20:45:01 2020, the following review was posted:

Reviewer: MagFors
Certification: certify
Comments:
??