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colcob
S2 licensed
Quote from fizzer :Forgive me if this has already been discussed, but I just started looking into this spring frequency calculation stuff and stumbled upon something interesting. The formulas I've seen all discuss spring rate. However, shouldn't wheel rate be more important? I.e the wheel rate is the spring rate multiplied by the motion ratio. Since spring compression is usually at an angle relative to the motion of the wheel, the ideal spring rate will be higher than the ideal wheel rate.

Perhaps that is why RL rates seem to be lower than lfs? The RL values might be frequency related to wheel rate while the lfs calculators have been calcuating frequency based on spring rate alone? Here's a link to a page that gives formulas for calculating wheel rate based on suspension geometry: http://www.swayaway.com/Suspension%20Worksheet.htm
Any thoughts?

The rates given in LFS are all wheel rates as far as we know, so this shouldnt be an issue.
colcob
S2 licensed
Yeah, the effect of downforce on simple harmonic motion is a bit wierd. Havent quite got my head around all the effects yet.
It certainly doesnt add mass or inertia for obvious reasons, so the acceleration of the mass in response to given forces doesnt change. But it does add a whole load of force, in one direction only.
So the mass accelerates more quickly going downwards, and decellerates more quickly when moving upwards. Have to have a tinker with the old spreadsheets and see what I can come up with.
colcob
S2 licensed
I think that he's saying, in S1, if you recorded an SPR of you taking a test drive of someone elses setup, the player name field would be changed to 'Test Drive' in the spr file.
In S2 the player name remains, but there is a byte flag somewhere to say its a test drive.

Thats how I understand it anyway.
colcob
S2 licensed
Yeah, despite my decidedly mixed feelings on the GTL demo, when I cranked up the time speed to 60x and watched the sun set and drove throught the night until it came up again the next morning, I was pretty captivated.
colcob
S2 licensed
Quote from Shotglass :um sorry reading it again i didnt verbalise the question well enough ...

in the equation for spring frequencies ... it the mass in it because of its weight or because of its inertia ?

Interesting question. If you imagine a mass attached to a spring in a zero G environment, If you push the mass to deflect the spring, it will rebound and undergo simple harmonic motion. And the mass/inertia of the object will enter into the equation. So obviously its mass does matter as the acceleration the mass undergoes as a result of the force applied by the spring is dependent upon the mass itself.

I think, although I havent done the maths to check it, that the frequency of oscillation will not alter with differing G forces, just the original deflection of the spring at rest.

I fact if you think about it, gravity cant enter into it, because g isnt in the equation.

You may sometimes see frequency equations which contain g, but they are actually just fudges which work because of the bizarre co-incidence that pi^2 = 9.87, which is close enough to g for people to think the equation works.
colcob
S2 licensed
Nonsense does it happen in reality. The glass over the instruments is always tilted downwards, and so you sometimes get reflections of brightly lit surfaces with the cockpit.
You never get actual direct reflected view of the sky out the back window, and if you did you'd get blinded everytime you drove away from the low sun.
colcob
S2 licensed
I really struggled with this. Simply doesnt feel right at all, I'm constanly fighting the FF, not being able to feel what the car is doing, and seem to get random, chronicly unrecoverable understeer moments.
Although to be honest, I've never driven classic cars so maybe thats just what they are like.
Not very much fun though.
FXR FX50 dashboard reflections
colcob
S2 licensed
Both these cars have upward tilted glass screens over the dashboard instruments, which means that when the light is behind you, you cant actually see the instruments properly.
colcob
S2 licensed
I'm afraid this just isnt possible. What would its three letter acronym be?
colcob
S2 licensed
Yeah, its cos of daylight saving time. We in the UK are currently on British Summer Time (BST) which is 1 hour head of GMT. So you guys are still one hour ahead of BST, hence +2 hours, or - 2 hours in LFS land
Setup 'Rename' function.
colcob
S2 licensed
It seems Scawen is going to be doing a review of how the setup management works, so I thought i'd throw this one in there.
At the moment, I find it very hard to remember which setup I did what times with and what the setup was like. I could just name the files with the times in, but its slightly annoying to have to make a new set then delete the old one. So simple rename function would be well worth adding.
colcob
S2 licensed
Quote from steve :WOW is all I can say, the demo is great I made a little video to :P

Oohh, get both hands on that wheel.
colcob
S2 licensed
Quote from Krane :AFAIK it isn't, like you said, "Body drag", if it was then damage would affect it. Toying with LFSTweak revealed that it is (in S1, don't think it has changed?) just a drag coefficient - as in a given number how much drag the car has, and not "modelled body drag" as such.

I really dont understand what you are trying to say. The body has a drag coefficient, therefore body drag is modelled. Thats how sims work, its the same for the wings, there's just a drag and lift coefficient and a very simple bit of maths. Real-time computational fluid dynamics is just a tad beyond the reach of desktop computers for the next few years.

Even if body damage did effect it, it would just be a statement that checked to see roughly how borked the body was, and adjusted the coefficient accordingly.
colcob
S2 licensed
Quote from BlueShaun :Jebus Gimpster, get a setup.

Its flatout the whole way to the chicane, and thats marginal..... ur just gonna cause pileups with advice like that.

Edit:
In fact heres a good one, i ran 35.6 with it. and its low nose

Pay attention dude. I'd like to see you run to the chicane full throttle in a FZR.
colcob
S2 licensed
I watched some British F3 championship stuff recently that was on channel 4 dead early on a sunday. My god, it was like a demo server. Absolute bedlam.

Not sure what my point is really, but I just thought I'd share that.
colcob
S2 licensed
Are you only driving the slower cars or something? How anyone can claim that aston historic in an F08 or GTR is not technical or challenging is beyond me.
colcob
S2 licensed
God I really ought to get a move on shouldnt I.
colcob
S2 licensed
What exactly defines a 'technical section' in a track, its something I've never really quite grasped. I always thought it meant lots of curved braking zones and multiple, undefined apexes, which LFS has absolutely heaps of.

Could you elaborate Mr Towler?
colcob
S2 licensed
Your site's down Bob.
colcob
S2 licensed
I dont really have much experience of LFS_news, but I know they posted the TSR vs ATC race report about an hour after Law sent it. So I dunno why you've been having problems.
colcob
S2 licensed
Because LFS doesnt actually use the spring and damper effects, it uses constant force variation, like GPL. So you can set everything to 0% and you get just the FF that LFS is providing without any driver software induced damping or spring effects.
colcob
S2 licensed
Quote from snewham :That's just purely weight difference for now.

No it isnt. Weight difference doesnt effect top speed. The UF without the roof has quicker acceleration but lower top speed.

Body drag is modelled therefore. However, as far as I know it doesnt change with body damage.
colcob
S2 licensed
To be honest, all the columns in the server list should be sortable. Its not exactly rocket science.
colcob
S2 licensed
Quote from spyshagg :Thrustmaster Force Feedback GT Racing Wheel

http://img.ferra.ru/pubimages/46275.jpg
http://jim.pp.ru/helps/hard/im ... heel-thrustmaster_08_.jpg

dont be fooled by the looks!
the wheel is made of Soft Rubber (feels so good).
ForceFeed back is strong, well, too strong (i play at 15% only, 100% it's nuts!)
The pedals, well... plastic :\
the brakes pedal is harder to push and the Accelerator is soft (just like my car pedals)

270º rotation only :\
i never tried a 900º wheel, so i dont know what i am loosing...

what Wheel you guys recomend? DFP ?

Wow, I cant believe you've got one of those thats still going. I bought one to play GP3 with, back in god knows when. It was pretty good, although eventually the paddles broke off, and the FF got as slack as hell. So I got a black momo, which was much better, and now I've just got a DFP, which is better again.
colcob
S2 licensed
Forget it. Uninstalled and re-installed the gaming software and it works fine now. Now I just need to get used to the damn thing.
FGED GREDG RDFGDR GSFDG