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+--- Thread: 42125 - Ferrari: I'm stuck... (/thread-24562.html)
42125 - Ferrari: I'm stuck... - Philippe Hurbain - 2021-04-16
I've started to model the 42125 set, and I have a problem with the front hood. This one is a 5-bar linkage, not so easy to create directly in LDCad. I created a Geogebra model that easily gives me a solution, but when I bring the values in the model the hood is placed very low and there is a collision between the hood and the chassis. I think I verified correctly all the assemblies, so I'm puzzled... That's probably a big, obvious mistake, but...
Geogebra file: https://www.geogebra.org/calculator/jrbf4qav
Model in current state attached.
RE: 42125 - Ferrari: I'm stuck... - Philippe Hurbain - 2021-04-18
Still banging my head on the wall about this one... it occured to me that the linkage assembly has several solutions, and indeed Geogebra gives me 3 potential set of angles, but only one is plausible according to existing photos of the set.
I assembled the car using Geogebra solution angles, the linkage works perfectly but... there are heavy collisions!
RE: 42125 - Ferrari: I'm stuck... - Magnus Forsberg - 2021-04-18
It's difficult to study your file. The main.ldr is empty, in your attached mpd.
RE: 42125 - Ferrari: I'm stuck... - Philippe Hurbain - 2021-04-18
(2021-04-18, 16:29)Magnus Forsberg Wrote: It's difficult to study your file. The main.ldr is empty, in your attached mpd.Yup... Here is the latest iteration
RE: 42125 - Ferrari: I'm stuck... - Philippe Hurbain - 2021-04-19
(2021-04-18, 17:50)Philippe Hurbain Wrote: Yup... Here is the latest iterationNow I feel stupid (again ?): was a mistake at step 231 where I added a beam 13 instead of a beam 11 !!!
should work much better now. Many thanks to Racingbricks for finding the bug...