JLC GG1 Truck Deterioration

[Rufus T. Firefly]

That's the point. The Hennings solution is not currently available. They did a number of sets, but not nearly enough to cover the entire production run of JLC GG1s.

Non-trivial mold to make. Probably more so to just use successfully.

Glad I'm about 99% done making molds; the 1% is for my own use. Cost of resin and everything has doubled and shipping like-wise.

[bob turner]

I think that is what happened. That, and their expert mold maker figured he was working for $5/hr.

Apparently not all of these JLC GG1 trucks failed. In that long string, a number of folks stated that they saw no damage. Maybe the zinc pest was in only one pour, and it isn't as big a problem as it seemed in 2019.

[Rufus T. Firefly]

I think that is what happened. That, and their expert mold maker figured he was working for $5/hr.

Seems likely.

Apparently not all of these JLC GG1 trucks failed. In that long string, a number of folks stated that they saw no damage. Maybe the zinc pest was in only one pour, and it isn't as big a problem as it seemed in 2019.

Different batches of alloy and different QC.

[gregj410]

https://o-gaugeforum.com/thread/13179/e ... on-project

[healey36]

https://o-gaugeforum.com/thread/13179/erecting-shop-tales-harmon-project

I saw this over there and wonder why it took so long. I will say I've had some issues with some small, thin prints warping, but 3D prints in general seem a good solution to this problem, maybe.

[Rufus T. Firefly]

https://o-gaugeforum.com/thread/13179/erecting-shop-tales-harmon-project

I saw this over there and wonder why it took so long. I will say I've had some issues with some small, thin prints warping, but 3D prints in general seem a good solution to this problem, maybe.

I do wonder about the longer term stability of resin prints. I guess if there's little physical stress or temperature variance that they might be good. But the history of resin casting (not printing) is resplendent with examples of what were perfectly flat and straight parts when put into the box years later being found to be significantly warped. I have also been told that some of the 3D printed O scale bodies for cars and others stuff has turned very brittle over time. It may all be resident in the types of resin printed or cast. Let's see where these go over time.