Rear Wing and or Spoiler
Posted: Fri Jan 11, 2013 10:55 am
Hi All
I think this topic may have been covered before in some way (MD?) - But was reading an article in the latest "TrackDriver" magazine - Volume 14 and in it they have done a CFD (Computational Fluid Dynamics) test - (I know what it is but by NO MEANS am I an Engineer )...on the effect that a Rear wing / Spoiler has on a standard saloon car...In Volume 14 it is in effect a "spoiler", but in Volume 12 it was the effect of a rear wing...
The results of this, I thought were rather revealing and interesting, in that - and I quote - "
Test done at 100Mph
"Standard Baseline Model - Lift = +1078.9(NM) & Drag = 1139.2(NM)"
"30Deg, 60mm Spoiler Lift = -116.6(NM) ....& Drag = 1044.1(NM)" ... The "-" is actually "downforce".. (yes, a change of 1195.5 NM)
"60Deg, 140mm Spoiler Lift = -692.5(NM)...& Drag = 1304.6(NM)"...A change of 1770NM (180KG)
So, the REAL intersting part is that "option 2" generated NEGATIVE (Downforce) of 692.5 NM, (from a POSITIVE of 1078NM)which is apparently equivalent to approximatly 180KG Change of weight on the rear, WITH a relatively small increase in drag
and Option 1, in fact created about -116.6 NM of downforce (and my simple calculation, which I am sure is not accurate) says that it would be equivalent to about 121KG of CHANGE in weight , BUT with a REDUCTION in drag..
Anyway, thought this may be interesting and was wondering if there are any "real" world tests or analysis done on the GTV???
Thanks
I think this topic may have been covered before in some way (MD?) - But was reading an article in the latest "TrackDriver" magazine - Volume 14 and in it they have done a CFD (Computational Fluid Dynamics) test - (I know what it is but by NO MEANS am I an Engineer )...on the effect that a Rear wing / Spoiler has on a standard saloon car...In Volume 14 it is in effect a "spoiler", but in Volume 12 it was the effect of a rear wing...
The results of this, I thought were rather revealing and interesting, in that - and I quote - "
Test done at 100Mph
"Standard Baseline Model - Lift = +1078.9(NM) & Drag = 1139.2(NM)"
"30Deg, 60mm Spoiler Lift = -116.6(NM) ....& Drag = 1044.1(NM)" ... The "-" is actually "downforce".. (yes, a change of 1195.5 NM)
"60Deg, 140mm Spoiler Lift = -692.5(NM)...& Drag = 1304.6(NM)"...A change of 1770NM (180KG)
So, the REAL intersting part is that "option 2" generated NEGATIVE (Downforce) of 692.5 NM, (from a POSITIVE of 1078NM)which is apparently equivalent to approximatly 180KG Change of weight on the rear, WITH a relatively small increase in drag
and Option 1, in fact created about -116.6 NM of downforce (and my simple calculation, which I am sure is not accurate) says that it would be equivalent to about 121KG of CHANGE in weight , BUT with a REDUCTION in drag..
Anyway, thought this may be interesting and was wondering if there are any "real" world tests or analysis done on the GTV???
Thanks