aerodynamics

[RAWAWA@aol.com]

Hey list! I'm new at this LSR stuff so please bear with me.My question (topic 
of the week?) is about how does one figure out a car's coefficient of drag? 
Is it frontal area alone, or in combo with other surfaces? Is there a formula 
that defines H.P. increase necessary to achieve a specific speed in 
conjunction with Cd? If anybody can simplify (real simple) this for me, i 
have more questions re:wings,vanes,canards,           ducting,et.al.  
Thanks,anybody? Bob W. in New York.