[ODE] Stabilizing cars (finally!)

[Jon Watte]

I'm not sure aerodynamic force is proportional to air drag. 
What I do know is that the aerodynamic down-force from an 
inverted wing is caused because air moves faster over one 
side of the wing than another, and thus the effective air 
pressure is lower on one side than the other. The difference 
of air speeds should be proportional to the construction of 
the wing (some constant), and the speed of the wing through 
the (immobile) air -- i e, linear with velocity.

However, not being a mechanical or aerodynamics engineer at 
all, I'd appreciate it if someone has a good link to a 
relevant site which doesn't require a Bachelour's in 
mechanical engineering to decipher ;-)

Cheers,

			/ h+


-----Original Message-----
From: ode-bounces at q12.org [mailto:ode-bounces at q12.org]On Behalf Of
Ignacio García Fernández
Sent: Monday, September 13, 2004 12:25 AM
To: ODE at q12.org
Subject: Re: [ODE] Stabilizing cars (finally!)


El 13/09/04 01:43:24, Jon Watte escribió:
> 
> 
> I actually have something similar, but I apply it in the "DOWN"
> direction
> of the car's body, and I always apply it (not just when in contact),
> and
> it's proportional to velocity, and I call it "AIR_SUCK" -- it's the
> general aerodynamical down-force that fast cars are designed to exert
> on

Yes. Actually you are simulating aerodynamic load. However, notice that  
it is not actually linear with velocity, but somehow quadratic.

I say 'somehow' because the air friction is proportional to the square  
of the velocity, and the aerodynamic load wshould be related to this  
value, although I ignore in what way.

Hope it helps to finetune your models.

Regards

Ignacio





_______________________________________________
ODE mailing list
ODE at q12.org
http://q12.org/mailman/listinfo/ode