GTL Setup Event – Tue 30th October 2012

flyer1gen.png

Server name: RACEDEPARTMENT.COM GTL

Mods: Main mod pack ( Download ) + Soundpack ( Download )
Track: Skidpad ( Download ) + Zolder ( Default track )

Event start: 20.00 GMT

Note 1: You will need to use Teamspeak for this event. If you don’t have a microphone you can still use Teamspeak to follow the event by listening, and I will keep an eye on the in-game chat where you can join in on the discussions and ask questions. ( Teamspeak setup guide )
Note 2: We will also use Xd for the setup testing ( Download here )
Note 3: To display the front wheels in cockpit view open your PLR file and set Wheels Visible In Cockpit="1"
Note 4: Please pick car number 1 for the event

Server password: click here
Racing rules: click here

Entry List:
  1. Knut Omdal Tveito
  2. Hans Sneep
  3. Rupe Wilson
  4. Tim Ling
  5. Roland Warmenhoven
  6. Jack Smith
  7. Peter van Zanten
  8. Jacob Boonstra
  9. Ian Strom
  10. Senad Subasic
  11. Ondrej Kapal
  12. Dmytro Botnarenko
  13. Arnaldo da Anunciação Junior
  14. Markus Hakamo
  15. Driver
  16. Driver
  17. Driver
  18. Driver
  19. Driver
  20. Driver
Rules:
This is being held in our Club, using Club Rules, and should be driven in that spirit.
 
Event Schedule:

The event will be divided into 7 sections.

1.First adjustments:
a. Steering lock​
b. Gearing​
c. Fuel​

2.Handling, Steady state balance (Skidpad, smooth surface)
a. Springs​
b. Anti-roll bars​
c. Ride-height​
steadyr.png


3.Tyre grip
a. Tyre pressure​
b. Camber​
c. Caster​
e. Suspension types​
4.Handling over bumpy surfaces (Skidpad, bumpy road and step/ramp)
a. Springs​
b. Dampers​
stepramp.png


5.Turn-in and direction changes (Zolder default track)
a. Springs​
b. Dampers​
c. Brake-bias​
d. Toe-in​
turnini.png


6.Combined acceleration/braking and cornering (Skidpad and Zolder)
a. Dampers​
b. Differential locking​
7.Free driving and continued discussions
 
Suspension characteristics

Camber change due to Caster angle
A high caster angle results in increasing camber as you turn the front wheels (an easy way to visualize this is to look at motorcycles and think what happens with the camber when you turn the front wheel). Below is a top-view of a BMW front suspension with 10 degrees Caster. As full steering lock is applied the camber increases to +6.6 and -5.8 degrees for the left and right wheels respectively.
caster.png



Camber change due to suspension movement
While driving on track the suspension moves in bump and rebound and the car rolls and pitches. As a result, the camber is very dynamic and can change significantly in both pure Bump/Rebound and as the car rolls. In the figure below, the Camber of the left and right wheels (written in red color) are shown for different suspension types. The camber is zero at rest for all the examples and the camber change is shown for two different cases, 7 cm Bump travel and 4 degrees roll angle.

Note that there is no camber change for a Live rear axle while for Strut and Trailing arms the camber changes almost the same as the roll angle. With a double wishbone suspension the camber is partly recovered and the the camber of the outside wheel has less camber loss compared to Strut and Trailing arms.
assemblycamberchange.png


(Pictures from Performance Trends Suspension Analyzer)​
 
Weight Transfer
During braking, acceleration and cornering the weight is transfered in the direction of the acceleration.​
  • Braking: weight is transfered to the front​
  • Acceleration : weight is transfered to the rear​
  • Cornering: weight is transfered to the outside wheels​
The weight transfer in braking/accel is less than half compared to cornering.
The total weight transfer is determined by the height of the centre of gravity and the track:​
weighttransfer.png
----> The only way to reduce the total weight transfer is to reduce the centre of gravity by reducing the ride-height
Effect of weight transfer on tire grip
The grip is at its optimum when the load is distributed evenly on all tyres (0% weight transfer).​
---> Any weight transfer will reduce the overall grip of the car.
weighttransfergrip.png
 

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