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Type: Posts; User: Flight909

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1. ## Thread: The DYNAMICS Part of Vehicle Dynamics

by Flight909
Replies
15
Views
23,398

### In yours examples you increase weight in your...

In yours examples you increase weight in your simulation but you keep same cornering compliance. This is maybe not possible in the real car, since the change in load on tire will change cornering...
2. ## Thread: Performance Electronics Traction Control and Launch Control Help

by Flight909
Replies
10
Views
6,460

### Look at very old pictures from FSUK - I remember...

Look at very old pictures from FSUK - I remember seeing pictures of teams adjusting CGH to make better acceleration. Make high ride height will help to put more distribution on rear in longitudinal...
3. ## Thread: A new free vehicle dynamics resource - Dan's Vehicle Dynamics Corner

by Flight909
Replies
291
Views
124,097

### Danny, congratulations on the good results, I...

Danny, congratulations on the good results, I enjoyed the video. Can you explain how you know the change in downforce from the dive planes? You do wind tunnel testing to learn this values?
4. ## Thread: Bicycle model

by Flight909
Replies
73
Views
30,329

### I would said you can try to set this following...

I would said you can try to set this following coeffiicents to zero: PHY1,PHY2,PHY3,PVY1,PVY2,PVY3,PVY4

If looking at the equation you see they will shift the curve up & down and left&right.
5. ## Thread: Jacking force

by Flight909
Replies
85
Views
80,249

### I would feel that the added roll angle of Mx...

I would feel that the added roll angle of Mx acting around IC will small on race car with stiff suspension. I think decrease in vertical spring stiffness of tire when Fy is high makes a bigger affect...
6. ## Thread: moment diagram with weight transfer

by Flight909
Replies
170
Views
77,489

### Maybe you should tried it, its classical...

Maybe you should tried it, its classical mechanics.

All the questions you discuss have to do with the tire force and calculations of slip quantities.
7. ## Thread: Slip Sensor?

by Flight909
Replies
17
Views
6,570

### Wouldn't the rolling shutter just show up as a...

Wouldn't the rolling shutter just show up as a bias in your calculated slip angle? And since you'd have to zero the angle anyhow, would it really be an issue?

I'm guessing the only thing would be...
8. ## Thread: Direct Acting Spring Damper

by Flight909
Replies
66
Views
32,567

### Also is important the effect when you have...

Also is important the effect when you have downforce because you can change balance with speed. With more compression of suspension the stiffness will change (maybe even balance front to rear), this...
9. ## Thread: moment diagram with weight transfer

by Flight909
Replies
170
Views
77,489

### I think we has to thinking about the tyres,...

I think we has to thinking about the tyres, because the limit of the diagram will deppend on the tyre limit. Which is the shape of your tire curve at the limit? If one axle has a big drop-of and the...
10. ## Thread: 2015 FSAE Michigan

by Flight909
Replies
86
Views
52,594

### What is the reason for GFRs penalty off -10...

What is the reason for GFRs penalty off -10 points? With out it they would beat Graz by 2 points.
11. ## Thread: moment diagram with weight transfer

by Flight909
Replies
170
Views
77,489

### MMM are constrained steady-state simulation so...

MMM are constrained steady-state simulation so the situation that is evaluating is not steady-state, once the constraints are "removed" the situation will change (for most cases). By investigating...
12. ## Thread: A new free vehicle dynamics resource - Dan's Vehicle Dynamics Corner

by Flight909
Replies
291
Views
124,097

### To be fair the roll angle not really a suspension...

To be fair the roll angle not really a suspension parameter, it is a vehicle parameter. If you read 10 mm displacement on your front right suspension, you don't know if that is coming from roll or...
13. ## Thread: Repeatablitiy of Tyre Data

by Flight909
Replies
27
Views
11,709

### How do you arrived at this conclusion? Looking at...

How do you arrived at this conclusion? Looking at the graph I see almost 10% difference in lateral forces for the different camber angles (for sure the markings on the graphs are quite difficult to...
14. ## Thread: New Rules Changes for FSG

by Flight909
Replies
68
Views
33,678

### What is the largest forces acting on the...

What is the largest forces acting on the suspension coming from? (I wonder if the FSG technical commitee know this?)

I think one good way to improve safety would be to disallow this forces,...
15. ## Thread: New Rules Changes for FSG

by Flight909
Replies
68
Views
33,678

### Another design constraint, another optimization...

Another design constraint, another optimization parameter.

CGz vs. aero (aka. How high can we make the roll hoop)

Attach aero to rocker, problem solved, loads goes straight to tire...

Not...
16. ## Thread: Damper rate graphs

by Flight909
Replies
6
Views
9,806

### Can you give some examples for this metrics you...

Can you give some examples for this metrics you mentioned? I don't understand how the metric being proven for a F1 (very important to chassis stable because of aero) and WRC (40 meter jump on gravel...
17. ## Thread: fitting of rims into the tyres

by Flight909
Replies
8
Views
2,961

### I think normally you can remove the tire from the...

I think normally you can remove the tire from the rim and put on a new tire. In least in my experience it is possible. You have to be careful though, because sometimes the inflation pressure has gone...
18. ## Thread: Vehicle Dynamics sim software/Adams Car

by Flight909
Replies
2
Views
1,565

### James, Before you maybe start looking in which...

James,

Before you maybe start looking in which software you want. Maybe you should ask what you want the software to do?

What kind of simulations to you plan to do? How do you plan to use these...
19. ## Thread: Damping Rates

by Flight909
Replies
84
Views
48,925

### So you trust a third party to do the work for...

So you trust a third party to do the work for you? What method is the damper supplier using then?
20. ## Thread: Rear upright design with new rims offsets

by Flight909
Replies
5
Views
4,184

### We used scrub for getting toe-in on acceleration...

We used scrub for getting toe-in on acceleration by having compliance. Not a huge amount but in theory we liked it. Also having toe-out in braking was not a problem because it made the car more quick...
21. ## Thread: Damper Dyno / Shock Dyno Motor Choice

by Flight909
Replies
2
Views
1,508

### I thinks that having large inertia in the crank...

I thinks that having large inertia in the crank wheel is more important then motor itself. What are you planning to do for that, do you have any CAD on this?
22. ## Thread: SpeedSource Race Engineering - Immediate Job Openings

by Flight909
Replies
7
Views
6,570

### What racing series is this engineering for?

What racing series is this engineering for?
23. ## Thread: FSAE Michigan 2013

by Flight909
Replies
208
Views
46,847

### I think that (at least in FSG) the judges are...

I think that (at least in FSG) the judges are looking at the procedure you have used to make your engineering decision more compared to the final design (of course you don't want to make basic design...
24. ## Thread: FSAE Michigan 2013

by Flight909
Replies
208
Views
46,847

### Too bad you put the mark in the middle of all...

Too bad you put the mark in the middle of all photos http://fsae.com/groupee_common/emoticons/icon_frown.gif

Anyways thanks you for sharing!
25. ## Thread: Negative consequences of very large steering work product in a passenger car?

by Flight909
Replies
12
Views
5,635

### There are a interesting article on this available...

There are a interesting article on this available on the FSG website: http://www.formulastudent.de/a...ves-box-of-tricks/1/
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