SCA Develops Cartie Simulation Software
Click on the thumbnails below for full size screen shots |
![]() |
![]() |
![]() |
The SCA's back room boffins and their clever little coding elves have been busy doing some fiendishly clever things with computers of late, and they are nearly ready to launch a full blown cartie simulator on the unsuspecting gravity racing world.
SCA CartieSim is a application that can predict the speeds of a cartie at any point on a course from some simple data describing the cartie and the coordinates of the course. The course can be loaded from a GPS data file or, if you don't have access to that, then a simple route from Google Maps or Google Earth can be loaded instead.
Taking into consideration such variables as overall mass, drag factor and rolling resistanc along with the gradient and turn radius of the course, the application plots a profile of speed against distance and can even identify sections of the course where you may need to use your brakes!
Key features:
- Course data loaded from GPS file, CSV file or online from Google Maps and satellite altitude database
- Simple "Course Wizard" guides you through loading a new course
- Calculates speed profile, time and maximum speed
- Calculates course data such as total length, average gradient, maximum gradient
- "Critical Velocity" calculation predicts sections where braking may be required
- Models dead, push and ramp starts
- Models different cartie configurations for comparison
- Calculates stopping distance after finish line
WOW! This looks excellent,
WOW! This looks excellent, what a brilliant tool!
Even more "wow" is the prediction of a top speed of almost 79mph - !!!!!!!!!!!!!!!!!!!!!
In reality, probably a bit
Woah, that looks awsume. So
Yes, in theory. It would
Yes, in theory. It would help if you could give figures for any or all of the following;
- all up mass (including driver)
- total mass of wheels
- frontal area
- drag factor
- rolling resistance
- track width
- static coefficient of friction between tyres and tarmac
- estimated height of centre of gravity (with driver)
On which hill did you clock 49 at Cadwell?I saw this app today, and it
drag coefficients
The figures at http://www.adventuresofgreg.com/HPVlog/01-09-05.html are not drag coefficient (Cd) but drag area (CdA). CartieSim separates out the two terms and you need to enter both the frontal area (A) and the drag coefficient (Cd). Some typical Cd values are here and here.
If you want to use drag area (CdA) instead of drag coefficient (Cd), you'll need to set the area to 1 regardless of what the real area is.
Any idea when this will be
august. probably.
Soapbox simulation software available soon
We're still on target for releasing SCA CartieSim in August - it's basically just testin, bug fixing and updating the help files now, with a few bits of polishing and tweaking as well. To whet your appetite, here are some graphs... (click on each one to see larger versions)