*RC Weight Transfer Part 2 - Dynamic Weight Transfer * Ask Ray Munday

Weight Transfer Video - Fundamentals Part 2 Dynamic Weight Transfer
Weight transfer is a critical but very misunderstood part of vehicle dynamics. In this (Part 2) of this video I cover dynamics of weight transfer including the effects of roll centres, springs and shocks and how you can use them to tune the handling of the car at different stages of a corner.
Any questions ask away!
Link to Part 1: (highly suggest to watch this first!!)
• *RC Weight Transfer Fu...
Link to the tyre traction video mentioned in the video:
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[@janetsbrick]

I was lucky enough to have Doug Millikan (of RCVD fame) as my uni vehicle dynamics teacher. I’m used to having to correct a lot of misconceptions and when I saw someone misquote what you’d said on this video I sat down and expected to find some.
Instead, I have to say, this is a great high level overview to cornering dynamics. First rate!

[@rmunday76]

Thanks for the kind words. Having someone like that as a teacher must have been amazing!

[@janetsbrick]

@@rmunday76 I didn’t appreciate it enough at the time, though they were easily the best engineering labs I ever had.
Your videos all seem really well done, I’m becoming a fan despite having no experience at RC scale.

[@patrickhooghvliet9943]

Thanks Mr Munday✌️🤙 very enlighting

[@xaviertaylor759]

Thanks for taking the time to explain these concepts. I'm still bemused, but will watch a few more times.

[@rmunday76]

Haha I hope it made more sense after watching it a few times :)

[@jameskomar5650]

If I understand you, the oil I the outside shocks should be thicker to help the inside tires from lifting in a turn.

[@rmunday76]

Hi mate, yes and no. If you have more damping on the outside initially there will be more weight transfer to the outside and less change from the inside so it will react faster. However that will jack the car up slightly raising the centre of gravity so it will then have more weight transfer and lose grip a little, so it's a trade-off. In full size shocks you can change the damping in rebound and compression and you can fine tune these settings.

[@1Serious392]

Very Good Info. I wonder how fast you could make a No Prep RC DragCar.

[@rmunday76]

The techniques should apply across to drag racing pretty well :). Maybe we will try it out in the future!

[@davidw5504]

Another fantastic video Ray, thanks for breaking down this sometimes confusing concept for new racers like me. Cheers!

[@rmunday76]

Thanks mate 👍

[@aspiratedaloha2946]

Good stuff. Really helpful

[@nacido89]

Hi Ray, Fantastic video!!. What happens in the situation where the the roll center is below the ground? In that situation roll center forces are negative? Thanks a lot in advance.

[@rmunday76]

Good question and it's actually the case for our 1/10 buggies that roll centres are below ground. Basically when there is a lateral force it pushes the inner wheel down and the outer wheel up, effectively slowing down weight transfer to the outer wheels. It also means that there is more leverage from the CG to the roll centre so the sprung mass roll angle is increased (more force acting on the springs so the car has to roll further). I'll do a follow up on this but the phasing of the forces (roll centre -> damping -> spring) doesn't change.

[@nacido89]

@@rmunday76 Thanks for the reply!