Roll Centres, PR SB401 laps, and a Wall (No not that one)

Above you see a few laps from today’s race. Nothing special, but there is something to learn there. How to not do what I did, and fly off the track. It has to do with roll centres.

Lowering the roll centre of the car, by raising the link on the inside, has the effect of making the car feel more “in” the track. It feels less “tippy” and softer, more stable, and less aggressive. I did this on my 2WD today to try and make it easier to drive, and it worked, I went faster than before. Sounds great right?

Well one of the downsides of running low roll centers is what happened to me here with my 4WD. In fast corners the car will roll and stay low, but if you don’t keep the throttle on, and the car stuck to the track, BOOM, it may or may not snap up and fly off the track. If I hadn’t let off the throttle there I would have made the corner nicely, but I wasn’t concentrating and I ended up in the wall.

To conclude: When running low roll centres the car is easy to drive, and less likely to flip over, but at high speed, you need to remember to keep that throttle on!

Below you see the PR Racing V3 front end. I only raised the links 1mm front and back.

Andy Smolnick of HobbyPro USA gave me these parts that bold on the front tower, that makes it possible to fine tune the front roll centre of the 2wd V3 buggy.

Andy Smolnick of HobbyPro USA gave me these parts that bold on the front tower, that makes it possible to fine tune the front roll centre of the 2wd V3 buggy.

One thought on “Roll Centres, PR SB401 laps, and a Wall (No not that one)

  1. Jeff Check says:

    If you are not flipping off the track or wicked traction rolling, then pile on the roll center!

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