R/C Tech Forums - First Model builder from Romania

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Very clever C-hub variation with these carbon parts!

Thank you !
Here it is a video with the working suspension wich is unique in the whole auto industry.
https://www.facebook.com/reel/2148314842603217

Quote:

Originally Posted by Hyro (Post 16245964)

Thank you !
Here it is a video with the working suspension wich is unique in the whole auto industry.
https://www.facebook.com/reel/2148314842603217

Are the moving cylinders weights for dampening with inertia - or something else?

Pretty cool stuff - all protos are, much respect to you :)

Yes, indeed. It's called INERTER

How is your experience with the inerter? Did you see any effects in some track conditions (i.e. bumpy)? Did you tune the mass or leverage to work on it? I remember Schumacher had a #tuned mass damper# in the Mi8, but it never really came to be a thing. I myself had to tune a mass damper for bobsleigh once, and the effect there was negligible - and rather strange for the pilots.

What I would also wonder: what is your experience with the varying spacing of the front arms? The FR balljoints are much further apart than the FF ones.

Quote:

Originally Posted by h2e (Post 16246046)

The most important gain is that I can use stiffer springs. The Inerter will make the car softer only when I input fast steering changes, or high speed bumps. The efficiency of the Inerter is its Inertance, wich in this case it is 10 times bigger that what you receive from a tuned mass damper. On my first prototype from 2013 I had 28g weights and an inertance of 250g. Now I manage to put 42g with an inertance of 600g, This gain is from the ratio of the rocker arm and fine tuning of the parts of the suspension. The bigger the inertance, the more you will feel you can make the springs stiffer.

Quote:

Originally Posted by h2e (Post 16246047)

What I would also wonder: what is your experience with the varying spacing of the front arms? The FR balljoints are much further apart than the FF ones.

This solution gives the car more initial prodive feeling. It can be countered with shims. It needs more testing in this area. But overall it offeres wider suspension arms and lower position for the steering mechanism.

Not yet for sale. Only prototype.

https://cimg6.ibsrv.net/gimg/www.rct...21eba4f3fb.jpg
This is how it looks with the inserted rubber