GT3 wing aero testing. Low, high, and Gurney flap
04-22-2022 | 02:29 AM
#16
Instructor
Joined: Jul 2012
Posts: 229
Likes: 40
05-12-2022 | 08:55 PM
#17
Intermediate
Joined: Jun 2014
Posts: 34
Likes: 7
Has anyone measured fuel economy as a function of speed on their GT3? I did some informal tests while on a long drive to the track in my 991.1 with "low" wing setting, and found the MPG drops pretty significantly at higher speeds, unlike my Cayman S.
At 65 MPH I was getting around 25 MPG. At 75 MPH this dropped to about 21 MPG.
My 981 Cayman is pretty stable at around 30 MPG. I wonder how much of the difference is the wing, and how much is the gearing (RPMs are much lower in the Cayman at freeway speeds)
At 65 MPH I was getting around 25 MPG. At 75 MPH this dropped to about 21 MPG.
My 981 Cayman is pretty stable at around 30 MPG. I wonder how much of the difference is the wing, and how much is the gearing (RPMs are much lower in the Cayman at freeway speeds)
05-13-2022 | 06:29 PM
#18
Burning Brakes
Joined: Oct 2011
Posts: 789
Likes: 217
From: Western NC
Tet
Gurney Flap is more of a Band-Aid for an improperly designed Airfoil " Speed/AOA" it's purpose is to lower the stall speed. By doing this it induces drag into Airflow.
If you look into Vortex generators you you might be pleased they induce less drag.
Gurney Flap is more of a Band-Aid for an improperly designed Airfoil " Speed/AOA" it's purpose is to lower the stall speed. By doing this it induces drag into Airflow.
If you look into Vortex generators you you might be pleased they induce less drag.
Last edited by flyjets; 05-14-2022 at 10:01 AM.
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