Unofficial File p/1-4cyloh.dat
part image
File Header:
0 Cylinder Helical Cylinder 0.25 with Edges
0 Name: 1-4cyloh.dat
0 Author: Magnus Forsberg [MagFors]
0 !LDRAW_ORG Unofficial_Primitive
0 !LICENSE Redistributable under CCAL version 2.0 : see CAreadme.txt

0 BFC CERTIFY CCW

Status:
1 subfile isn't certified. (SN)
Size: 360 bytes
Reviewers' certifications:
MagFors=novote
Philo=novote
Required (unofficial) subfiles:
Cylinder Helical Cylinder 0.25
Status: Needs more votes. (N)
Download: p/1-4cylih.dat
Related (unofficial) subfiles:
~Technic Gearbox 2 x 4 x 4 (Axle 2)
Status: 3 subfiles aren't certified. (SSSF)
Download: parts/46226.dat
~Technic Worm Gear Body
Status: 3 subfiles aren't certified. (SSSN)
File reviews and updates:
At Sat Mar 9 12:25:01 2019, the file was initially submitted.
Submitted by: MagFors
At Wed Mar 13 20:40:01 2019, the following review was posted:

Reviewer: MagFors
Certification: novote
Comments:

My prim doesn't work as I expected it to do. It turned out to be very strange.
It seams to change angle when I enlarge it, and I can't make it longer.

1 16 0 0 0 1 0 0 0 .1 0 0 0 1 1-4cyloh.dat
1 16 0 .2 0 1 0 0 0 .2 0 0 0 1 1-4cyloh.dat
1 16 0 .5 0 1 0 0 0 .3 0 0 0 1 1-4cyloh.dat
1 16 0 .9 0 1 0 0 0 .4 0 0 0 1 1-4cyloh.dat

1 16 1 0 0 1 0 0 0 1 0 0 0 1 1-4cylih.dat
1 16 1 0 0 2 0 0 0 1 0 0 0 2 1-4cylih.dat
1 16 1 0 0 3 0 0 0 1 0 0 0 3 1-4cylih.dat
1 16 1 0 0 4 0 0 0 1 0 0 0 4 1-4cylih.dat

Maybe I should abandon this idea.

At Thu Mar 14 06:50:01 2019, the following review was posted:

Reviewer: Philo
Certification: novote
Comments:
Ah, yes, I should have realized! with this primitive you have two parameters that are linked together: "slope" of helix AND height of cylinder. It works (with some restrictions) with my cylh primitive because you can pad it with normal cylinder primitives to change height independantly of slope. Restriction is that you can't build an helix with height lower of height change. The lower segment count of primitive used, the lower the height of helical cylinder that can be build (and a 4-4cylh primitive would have the same problem as your cyloh prim).
Finally, helical primitives (including cylh) is not such a great idea :(

Note that cyls/cyls2 share the same kind of problem (slope of intersecting plane and height of primitive are linked together). Here again we can compensate with cylinder padding, but it remains clumsy.