Does anyone know what these trolleys are for at GigaTexas? Judging by the size and quantity I wonder if they could be for the front and rear ends of unboxed production? They look a little too small for a full vehicle.
That said, there could be a number of reasons for them (e.g. just carting battery packs around now that volume is increasing substantially)
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These trolleys look like something new, we haven't previously seen them being installed for Model 3/Y lines, so they could relate to Cybertruck / Gen3 lines.
My best guess is that the floor of the Gen3 vehicle is still a front and rear casting with a structural battery pack, given the relatively small sizes these trolley big be able to accommodate those parts. having a casting overhang the trolley provides easier access.
It has also been suggested these trolleys could be used to move parts, Tesla talks about operator density for Gen3 and working being done of the vehicle while it isn;t moving..
If a station had 4 operators and each operator had a trolley full part parts that is a lot of parts that could be installed at that station. This might be a bit different to a traditional assembly line, with each operator is installing multiple parts.
Loading the correct parts on trolleys would be a good entry level position for Optimus.
The single large casting for Gen3 is confusing, because it conflicts with what we were told about "operator density" on Investor Day. However, what makes sense to be is a single casting for the roof and the side pillars, If that was done, the bulk of the car body is made up of castings, most of the traditional body-shop concept is eliminated.
If they are thinking of a single casting, they could initially start out like the original Model Y rear casting, joining multiple castings.
The roof section could be suspended at a convenient height for operators to install the interior before the final assembly phase.
The idea of casting the roof was discussed in the engineering thread previously many had reservations. IMO it makes sense, because a single large casting for the floor would be a very bad idea. It destroys operator density, and may make difficult to replace the battery pack.