dspp wrote:Howard wrote:odysseus2000 wrote:Episode 2 (approx 11 minutes) of the Munroe tear down of a model 3. For anyone who has not tried to manufacture stuff this may be interesting in terms of the way small components elimination reduce cost:
https://youtu.be/61s1XNVSfiIRegards,
I'm probably covering ground which BobbyD summed up more quickly with his comment.
And you know I'm not an engineer. But wouldn't a professional engineer cry when he saw the sloppiness of the build that Sandy Munroe exposes at 4mins 50secs onwards?
The areas of the undertray are loose and flappy as he pulls them down to explain that Tesla now leave off a couple of plastic fasteners to save 20 cents. He seems to completely miss the wastage of designing the car with the two holes for the stud fasteners in the metal frame (casting?) which they are fixed to and then not using them.
So we have a couple of bits of the undertray which are so loose he can pull them down easily and this is seen as a virtue.
![Sad :(](./images/smilies/icon_e_sad.gif)
It wouldn't surprise me if wind resistance at 70 mph gets them flapping on a motorway causing vibrations, noise and possibly water ingress.
Perhaps this is the type of thinking which lets cars go out with rear lights which let in water in a UK winter?
Would a German car manufacturer be happy with this kind of sloppy design? I doubt it.
regards
Howard
You haven't understood what Sandy is saying. He is praising the reduction in fastener count, and noting that those fasteners were unnecessary, and that their removal is a good thing. He is also well aware that one does the quick thing first (stop using those fasteners, eliminate the part), and the slow thing later (if at all) i.e. adjust the undertray moulding to eliminate the corresponding holes.
I don't always agree with Sandy on everything he says, and I'm not 100% sure I agree with him on the observations he is making in this film. However I do at least understand him, which is a start.
regards, dspp
I think I do understand what Sandy is saying, but I think he is wrong.
I was lucky enough to work with a large team for a number of years and in those days we practiced “kaizen”. We saw how Japanese manufacturers revolutionised the making of products like dependable cars. And how they would save costs by making sure for example that the pipe in a car engine was just the right length and not over- long like British Leyland cars of the past.
Their attention to quality and costs paid off. They made profits selling reliable cars. Later on, even Top Gear couldn’t kill a Toyota Hilux!
Continuous improvement worked brilliantly for me and the team. And it’s one of the reasons that I’ve been lucky enough to drive nice cars. Yes I’ve looked underneath them on occasion. And have visited Mercedes in Sindelfingen a couple of times as well as Porsche and the Jaguar XK plant. I’m aware of the combination of many small features in a car that make for a pleasant three-year driving experience.
Amusingly, when I owned Mercedes vehicles they were so pleased with the quality of the underside of their cars that the Main Dealer used to send me videos of the inspection of the underneath of the car every service!
I’d be amazed if Japanese manufacturers of much cheaper cars, made down to a price, weren’t horrified if they looked at Sandy’s video and the sloppiness of the undertray of that Model 3. Premium car makers must be amused by it. Am I being unreasonable to suggest that, if I were a competitor, I’d use it as a training video for my sales teams to show how Tesla skimp on quality.
Dspp, would you as an engineer be proud of the quality of the workmanship shown in the video? Did your company manufacture to that sort of standard?
![Wink ;)](./images/smilies/icon_e_wink.gif)
And would you support the removal of a couple of fasteners with the possibility of vibrations etc to save 20 cents?
regards
Howard