ovalreno
Posts: 2
Joined: Tue Nov 13, 2007 5:58 pm

rc car aerodynamics

Postby ovalreno » Tue Nov 13, 2007 6:12 pm

I have an rc car and whenever i put the back wing on it and slide the rear end my car flips but without it it slides on all four wheels, do you know why that is?
steven wise

Craig_Bridge
Former Expert
Posts: 1297
Joined: Mon Oct 16, 2006 11:47 am

Postby Craig_Bridge » Wed Nov 14, 2007 6:47 pm

I have an rc car and whenever i put the back wing on it and slide the rear end my car flips but without it it slides on all four wheels, do you know why that is?

Short answer No. Long answer: Not enough information. Some questions that might lead to an anwer:
1) How does the wing affect the center of gravity?
2) What aerodynamic drag does the wing add to forces in the rear end slide in the direction of the slide?
3) Does the rear wing change the down force and thus the speeds at which the slide occurs?
4) Does the rear wing change the lateral acceleration when the rear end breaks into the slide?
5) Does the rear wing cause a down force preload on some suspension spring element that when released cause a force that alters the behavior?

Vehicle dynamics is a complex problem that is very hard to measure and model.
-Craig


Return to “Preparing for the Science Fair”