42125 - Ferrari: I'm stuck...


42125 - Ferrari: I'm stuck...
#1
Question 
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... Huh
Geogebra file: https://www.geogebra.org/calculator/jrbf4qav
Model in current state attached.


Attached Files
.mpd   42125 - Ferrari 488 GTE AF Corse.mpd (Size: 46.7 KB / Downloads: 7)
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RE: 42125 - Ferrari: I'm stuck...
#2
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!


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RE: 42125 - Ferrari: I'm stuck...
#3
It's difficult to study your file.   The main.ldr is empty, in your attached mpd.
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RE: 42125 - Ferrari: I'm stuck...
#4
(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 Wink


Attached Files
.mpd   42125 - Ferrari 488 GTE AF Corse.mpd (Size: 106.33 KB / Downloads: 2)
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RE: 42125 - Ferrari: I'm stuck...
#5
(2021-04-18, 17:50)Philippe Hurbain Wrote: Yup... Here is the latest iteration Wink
Now I feel stupid (again ?): was a mistake at step 231 where I added a beam 13 instead of a beam 11 !!!  Blush should work much better now. Many thanks to Racingbricks for finding the bug...
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