rally pace notes with google maps get direction

from google maps

the "get directions" of google maps reminds me of rally pace notes. anyone using the app for tsd rally?

downforce

basics of downforce, simplified. from: http://superhachi.com/theory/downforce/

gurney flaps

note to self: those are called gurney flaps and not ducktails as it is colloquially called in the philippines. what does it do - you ask? well, nothing much. it just enhances the wing for further downforce. check wikipedia on http://en.wikipedia.org/wiki/Gurney_flap for further info.

but will it work on the rear end if it's not attached to an airfoil? hmmm. i wonder.