News detail and comments

RE-ADJUSTING CAMBER RANGES FOR NITRO BUGGIES

21.01.2015   Category: Site news

Some members have reported that buggy setups allow for some very unrealistic settings, like 16 degrees negative camber. We have looked into the camber adjustment issue and have drawn the following conclusions.

Camber is the result of the length of the camber link and the inner and outer camber link pivot points. These points affect the roll centers of the car. However, the tire model was not designed and never tested with such large and totally unrealistic camber angles.

As we have 2 rows of pivot points the adjustability range of the camber link has to be quite big in order to achieve normal camber values with all positions. Marcin used the most inner and most outer positions combined with the shortest possible camber link setting resulting in 16 degrees negative camber. And apparently this works very well for him in combination with other settings.

The use of such unrealistic camber angles was not foreseen and needs to be corrected. The only way to achieve this is to remove the outer positions B2 and B4 and inner positions A1 till A4, and limit the adjustablity range of the camber link for the popular NX8-R chassis. We will adjust the other chassis in a similar way.

I am very much inclined to do this. However, this means that if your car uses a setup using positions that have been removed or a camber link length outside the range, that these values will be reset with the default values, and you might have to take a new look at your setup again as it may not work as before.

Let me express that Marcin Malinski was not the only one doing this, so this does not take anything away from his World Championship title.

We plan to update the buggies Wednesday 28th around 11 a.m so during the regular round break so it will not affect the racers who are racing Round 2 of Season 1 at Psycho Nitro Blast 2012.

Comments

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16.03.2015 [05:18]
Posted by: Anthony Bruyer (FR) on 2.2.2015 23:57:19 (UTC)
Posted by: Pieter Bervoets (NL) on 2.2.2015 13:19:34 (UTC) I have compared laptimes on several tracks before and after the update, they are very similar, so it seems this update has not affected the performance of the buggies. This is the case in all racer classes. It's unfortunate that we had to take this quite drastic measure, it's the first time we have ever done this but I am now convinced that it was the right decision which has served the general interest of the VRC project and its members.
Thanks for you answer pieter, yes laptimes are the same but it's harder to drive the buggy feel less sticky to the track so it's more difficult to be regular. Sad to hear that you still have some money troubles, maybe steam will help you ! I can't understand why people dont try it more than 1hour :/

maybe if there were more than 1 person actually playing multiplayer then people would be more inclined to play.
27.02.2015 [17:56]
Update 18.02.2015:
Am I seeing right and they turned the changes back as they were before??

Downstop range changed back to 15-35mm (as was before).
25.02.2015 [03:03]
Also, why would you even allow camber adjustments to go beyond -3 degrees? -5.6 camber? Comon' now...I know it's a simulator, but shouldn't it simulate real life suspension settings? Personally, I would never be caught dead running or even try -5.6 degrees on camber on my off-road vehicle. It's rather silly and takes away from the overall realism of the simulation.

My 0.2 cents on the camber situation.
25.02.2015 [02:40]
I reality, droop settings control the longitudinal weight transfer. Weight being shifted through the front and rear suspension under acceleration and braking. I've done some testing on VRC using normal and large variances between the front and rear and there was little to no handling difference.

In reality and luckily for us in VRC the droop settings control the amount the car rolls (mid corner). Now this is all spring, ride height, and droop dependent. If you run soft springs, you must run more droop. Why? The car will roll more with softer springs. As the chassis is rolling (mid corner) the weight transfer on left suspension arm is high (droop screw is far from the chassis plate), whereas the right suspension has less (droop screw is close to the chassis plate). You want to try and prevent or reduce the influence droop screws have on the cars handling (mid corner). If the droop screw makes contact with the chassis plate, then it will cause an abrupt change in the suspension handling. Now this depends on which end of the car it's making contact with the chassis plate push - (front) or loose (rear). You want to try and make sure the cars suspension is working through it's whole range of suspension stroke.

As you increase the spring rate the amount of roll changes, which in turn should allow you to run less droop.

Hope this was of any help.
20.02.2015 [05:02]
My biggest gripe with this whole thing is that even if Todd left, there should have been documentation and a paper trail for everything in the engine in order to fix issues if they arose. It sounds to me like he was trying to preserve his future unnecessarily, then up and left with no one in line to replace him for physics engine development.

Poor planning on VRC's part in my opinion. Still a spectacular sim, and I have no issue with restrictions being placed on the car setup, as conditions on real tracks will not always be ideal either. But it does come down to this being a Band-Aid fix, and it creates issues in itself.
04.02.2015 [00:04]
I believe the higher the droop number (in the negative) the more droop is applied or the lower the tires will be below the underside of the chassis when the car is in the air.

A value of -25 would have less droop than -35.

Edited by author: 4.2.2015 0:06:38 GMT

Edited by author: 4.2.2015 0:13:01 GMT
03.02.2015 [22:30]
Ok, I think that came out a bit wrong. I understand the idea of droop. What I meant was, what's the difference between the previous version and this version and which way should I be moving the slider. I just don't understand it from a number point of view. I need a picture to understand it....roll on visual representation
03.02.2015 [17:10]
Droop or down travel is discussed in section 7 of the below link.
This article is a must read for those not sure of the cause and effect of setup changes or even learning a little to what you may already know about setup.

http://jq-products.com/the-news/43-the-testing/160-the-guide

Edited by author: 3.2.2015 23:57:52 GMT
03.02.2015 [06:56]
Posted by: Jasper Tjarks (NL) on 2.2.2015 19:30:34 (UTC) Drive a couple laps with low and high droop settings.


Less range now though. Just high droop basically.
03.02.2015 [06:49]
Thanks Pieter, we definitely wish VRC the best with funding and very much appreciate the investment & development already. Amazing game!

But hopefully some solution can be found to continue development of the physics engine and bring out new cars. It would be sad for it to die.

Since the model is already there, improvements would frankly not be that hard for a qualified person. Small increments are all that's needed over time to keep it getting better. Oh, and droop is an easy fix (the biggest error in the last update).

Edited by author: 3.2.2015 6:53:52 GMT

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