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Craig Scarborough Profile picture
@ScarbsTech
Jun 17 • 6 tweets • 6 min read Twitter logo Read on Twitter
Scrolly
Williams are another team bringing a big update to their car.
The FW45 has had a thorough aero review, with one set of bodywork readied for #AA22 at the #CanadianGP.
#F1 #F1Tech ImageImage
The floor is the key change. Mostly the underside, but the inlet fences, floor edge and diffuser are more visible changes. The rear brake ducts are reworked accordingly.
#F1 #F1Tech ImageImage
Also the sidepods, feature new inlets and a deeper scallop to the waterslide. Directing more flow to the diffuser.
#F1 #F1Tech ImageImageImageImage
Mirrors are revised to suit the reshaped sidepod.
#F1 #F1Tech ImageImage
Subtle changes to the rear suspension fairings
#F1 #F1Tech Image
New sidepod packaging lead to an added cooling outlet at the tail of the engine cover.
#F1 #F1Tech Image

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More from @ScarbsTech

Craig Scarborough Profile picture
Jun 17
The first big update to the AMR23.
Heavily revised sidepods, floor edge and cooling outlets.
#F1 #F1Tech #CanadaGP ImageImageImageImage
The waterslide is narrowed and starts with a distinct edge. This may be to contain the rotating airflow, which marries up with the revised undercut, to create more load over the diffuser.
#F1 #F1Tech #CanadaGP ImageImage
The undercut feeds into the floor edge further back and with more more load.
The floor edge has been revised, but not in a substantially different way.
The rear tyre temperature sensor is embedded in the floor (red)
#F1 #F1Tech #CanadaGP Image
Read 5 tweets
Craig Scarborough Profile picture
Apr 1
Corner entry deceleration issues for RBR persist.
#F1 cars 'brake' in several ways. There's the hydraulic brakes, hybrid braking and engine braking. All affect how the car slows & rotates into a turn. From inputs at the pedals, calculated by the ECU.
#F1Tech #AustralianGP
Simply lifting off the throttle gives engine braking. This map can be varied from the steering wheel button (EB or Torque). Altering the throttle/fuelling at that moment.
More EB (up to a point) gives stability/understeer. Less EB gives more rotation.
Confusing things more are the differential settings, that gave a similar balancing effect on corner entry.
Read 5 tweets
Craig Scarborough Profile picture
Apr 1
Speaking to guests after #AustralianGP Quali, Lawrence Stroll revealed part of the reason for AMR's pace & why LS was a little slower than FA, but much closer today
The bulged sidepods are driven by exhaust vibrations to ease boundary later build up over and the car
#F1 #f1tech
Boundary layer is a phenomena where there's a layer of air stuck to the car. Over long surfaces it builds up & upsets the aero.
AMR tech director Dan Fallows discovered at Red Bull, during the exhaust blown diffuser era, that vibrating the bodywork reduces this. As used on planes
So, the large sidepod flanks are built internally, to be vibrated by the exhausts, not using the exhast gasses, just their movement
The large flanks to the sidepods each house a large internal volume called the 'Resonant Tank'. This shakes the waterslide tunnel and the underfloor
Read 5 tweets
Craig Scarborough Profile picture
Mar 5
Given the initial success, here's a closer at what probably the most changed car in the grid, the @AstonMartinF1 AMR22.
#F1 #F1Tech
Given the car's pace, the floor edge is very simple so far.
Just a single section, scroll and cut out. No floor edge flap.
There's a lot of development potential in this area.
#F1 #f1tech
Most noticable is the extreme waterslide set up.
Directing flow towards the beam wing/diffuser to added downforce.
The actual size of the gulley is hard to gauge. But, there's a lot of flat level floor exposed around the back of the car.
#F1 #f1tech
Read 7 tweets
Craig Scarborough Profile picture
Feb 27
During the unveiling of all the new #F1 cars, the terminology of all the shapes and features gets out of hand.
Here's a simple overview of some of the sidepod jargon we use.
Starting with 'coke bottle' this is the way the sidepods slim between the rear wheels
#F1Tech #F12023
This year a new term and popular design feature is 'waterslide', also described as downwash sidepods.
It's where the top surface slopes down the rear.
#F1Tech #F12023 #F1
An old featymure, but one that gets more extreme every year is the 'undercut'.
It's where the front corner of the sidepod tucks in
#F1Tech #F12023 #F1
Read 7 tweets
Craig Scarborough Profile picture
Feb 26
I had to draw the @WilliamsRacing #FW45, such nice lines and livery. It's much more conventional this year, which is probably a good idea.
#F1 #f1tech #F12023 Image
The sidepods are a mix of a downwash waterslide ontop, combined with a ridged shoulder and deep front undercut.
This seems to tick every design option and meet all of the aero functions
#F1 #f1tech #F12023 Image
While floor appears to be simple, but is a work in progress. With obvious panel lines to allow new bits to be bonded in.
#F1 #f1tech #F12023 Image
Read 6 tweets

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