2nd Gen R59 Roadster Most liked posts in thread: R59 hitch receiver project

I looked at it again today from under the car and I think it's the weld. My guess is that it moved in their jigs (if they even used a jig) when they welded it. It's definitely skewed from the cross member. Very disapointing

 

I use both interchangeably without any bias. It's all about what's more practical for me.

In this case it is hard to get accurate angle measurements (the longer the line, the greater the error) so to get better accuracy I use triangulated dimensions which allows me to know more how much error to account for. mm are more precise in this case, and quick for hand measurements (I'd waste my time with fractions on inches.)

The decimal system is really the easiest. Think of it as simply counting foot steps. However easiest doesn't always mean fastest, it's harder to divide quickly and numbers gets bigger. So when I need to know more quickly the middle of a dimension, count a surface area, or if I need to measure something more grossly I'll use inches just as easily.

What ever works best for that application is what I'll use :wink:

 

Yes, I use CAD as well often (SolidWorks or ProE).
It depends what I build...

This was just for initial measurement of the bumper geometry. Next I'll be doing 3 things: Some sketching to look at different ways to design it, start to put things in CAD for detail refinement of some of the more mechanical areas, and in parallel possibly some model prototype to check the design use. :biggrin5:

We use to have a plotter at work but it stopped working and it has not been the first priority to replace but It's a lot faster to trace by hand on paper sometime for simple things like this.

 

Ha ha, awesome! Thank you for this. I'll have to use it at work sometime :cornut:

 

I feel a bit relieved today, Aaron @ Outmotoring is going to send me a new hitch receiver for exchange

 

Angib, you're right on it.
I don't know exactly yet and that is an area I'll be paying very close attention.
In no way will I let damage happen to the car paint :cornut: . . . I'm quite particular about quality...

That said, with anything I design I always vote for optimistic first and step back from there as issues arise. To me that's the best way to push the limits of the design as far as I can rather than getting too comfortable with huge clearances and overly strong and heavy elements right away and end up with a working but not that desirable solution.

As you can tell I'm already planning for a full size wheel. Being the worst case scenario vs the spare that will give me a base line for weight. However I will use the spare tire for positioning since it is what will be more often mounted to the bracket. You can see on the drawing I'm positioning the spare so it is balanced between the stop light I want visible and the exhaust I want to stay away from.

Keep tuned!