Modern ducktails vs aerodynamics

[kingstondc5]

After a discussion on another board about ducktails for a 996, OPC Hatfield (and im assume others do) off a ducktail spoiler for the 991 along with the 997 Sport Classic, RPM have the CSR (997).

Do you think, in particular, that the duck tails offer the same sort of aerodynamic function a turbo/GT3/GT2 wing would offer?

Im assuming that Porsche put the SC through a wind tunnel but does anyone know if the aftermarket tuners do. I know i could just phone up RPM and ask them but thought i might provoke a discussion on the topic first.

Does anyone know what the down force kg produced is against an oem spoiler?

Or would the sort of downforce figures being talked about only really work at 150+ therefore its not really that important?

[Harris_I]

Not important. Most track day drivers will struggle to make use of extra aero. On the road it's just for show.

[Geneve]

Paul Frere did quite a few articles in Flat-6 magazine about the aerodynamic evolution of the 911, and IIRC the duckdail (burzel) developments are in his book. He often discussed the reliance of the 911s high speed stability on the correct relationship between rear downforce and front axle lift.

The recent ducktail applications have really just been retro-aesthetics, although they will obviously have been tested for safety - just look what a difference the small spoiler made to the original Audi TT.

[Longman66]

Spoilers reduce lift , wings create downforce

[TB993tt]

Longman66 said:

Spoilers reduce lift , wings create downforce

Not "quite" as cut and dry as that is it ?

[mr pg]

RPM are also looking at moulds for 996's.

[anonymous-user]

Excellent news on the 996 ducktail moulds - very interested.

[Als911]

Here's my 996 Gt3 with its Ducktail, courtesy of RUF when they built the car into an RGT in 2001. I do love the subtlety of the ducktail styling.

Edited by Als911 on Wednesday 2nd October 23:58

[LWT RSR]

Als911 said:

Here's my 996 Gt3 with its Ducktail, courtesy of RUF when they built the car into an RGT in 2001. I do love the subtlety of the ducktail styling.

Edited by Als911 on Wednesday 2nd October 23:58

Looks great too !

[R2FU]

Harris_I said:

Not important. Most track day drivers will struggle to make use of extra aero. On the road it's just for show.

Proper aero downforce I'm sure you're right - but on the road a spolier can make quite a difference to reducing the lift most cars create, I'd expect, to the benefit of high speed stability. I'm thinking of the early Audi TT as an example.

[M@1975]

That 996 ducktail looks lovely. want.

[kingstondc5]

Took this cheeky snap of the RPM ducktail over the weekend, thought id share it with you as i cant seem to find any close up pics;

[Slackster]

The RPM ducktail looks great, shame they are so expensive..