Odd Q on reddit made me look into steering wheel electronics.
Most teams have had a maximum of 9 rotary switches on front of the wheel. I thought this was a limitation of the internal hardware.
But Ferrari have 12! Image
All the buttons, paddles and switches connect to a spec interface unit, that aggregates and joins them via canbus to the ECU.
This is what limits the number of controls. With 18 buttons and 11 rotary switches, plus a pair of extra controls. Image
The 18 buttons are on both the front of the wheel plus the paddles on the back. The gearshift paddles can have redundant switches in case of failure
The 11 rotary switches are the multi position controls, but are also used for the two clutch paddles. Hence 9 are left on the front Image
Ferrari have maxxed out on 13 rotaries, despite having only 11 on the interface unit.
They've been able to do this by only using 1 clutch paddle and have employed the 2 spare controls as extra rotary switches. Image

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More from @ScarbsTech

Jan 31
Let's have a closer look at the 2022 #F1 regs on a bit more detail.
First off: suspension. The regs detail the outboard & inboard suspension.
Outboard the suspension must pass into the bigger wheels & must not change ride height +2mm. This bans the exposed pivots & pushrod mounts Image
The change in the sloped chassis will affect suspension.
Up until 2021 the taper from nose to cockpit, could slope up to 625mm high. This created space for the inboard pushrod suspension.
For 22 the taper must be linear, creating no space, this will lower the inboard suspension ImageImage
The option of pushrod or pullrod geometry opens up.
Having a lower inboard set up, flattens the effective geometry of the wishbone/pushrod. The pushrod must be inside the wheel & no lower 40mm below the axle.
So, it may be better to have a pullrod. Image
Read 5 tweets
Jan 11
Some more pictures from my visit to @SilverstoneIM last week.
Merc 2006 #F1 PU
ES Energy store (battery)
Left and right banks
Read 5 tweets
Jan 11
From the @ScarbsTech archives, Ferrari 126k 1981.
When #F1 cars were made mainly from aluminium!
The chassis was steel tube clad in alu, just 20cm of front crash structure, rocker arm suspension front and rear.
Front wing off the ground to feed the underfloor tunnels
Power came from a 1.5l 120° V6, with a hot 'V' nestling two turbochargers and a central wastegate.
Alu inlet plenums outside the V, just visible either side of the cylinder heads
Analogue Cockpit: Veglia dials, gear stick, steel roll hoop, extinguisher & medical air tanks, ARB adjuster, boost adjuster, in your face extinguisher outlet.
Read 4 tweets
Dec 23, 2021
Following yesterday's 2022 rule tweet.
Here's what the underside of the car will look like
A small diffuser & flat floor will be replaced by bigger venturi tunnels. This will (wrongly) be called ground effect as in the 80s (+ no skirts)
Bargeboards & the Y250 front wing replaced
The old flat floor (yellow) with the short diffuser (blue) is switched. For a tunnel set up with long inlet leading to a curved floor (not totally flat) and longer diffuser section.
This creates more downforce and is less sensitive behind another car
In 2021 the front wing and bargeboards all served to create outwash and a messy wake behind the car.
Flow into the 2022 underfloor is largely influenced by the front wing shape and inlet fences. The rear brake duct fence will also help manage airflow at the back of the floor.
Read 4 tweets
Dec 22, 2021
There are all new regs coming to #F1 for 2022
The cars will be totally different, as the problems of overtaking have been studied and the rules start to resolve the issues.
This has been in the pipeline for years
Thread:-
The aims are to reduce the wake the car creates from its complex aero (FW, bargeboards etc). While at the same time trying to make the following car less affected by the wake, i.e. not losing so much downforce.
So, the car us simpler and creates more downforce under the car.
Teams will redesign the entire aero package from scratch. Theres no reference or carry over to the current aero.
The tyres & wheels get bigger
Power units & gearboxes gain 1 final upgrade, then are homologated until 2026
Read 4 tweets
Dec 21, 2021
Another #AbsurdF1Comparison - springs.
A roadcar spring (large), Williams rear corner spring, Force India torsion bar
#F1 cars used to use coil springs mounted around dampers (coilovers) to support the car. Torsion bars replaced coils as they were easier to package (1990s).
There are other spring types used on #F1 car suspension.
Often heave movement is controlled by Belleville washers, flat cone metal springs that can be stacked to gain the reqd spring rate.
Then there are carbon fibre disc springs, similar to bellevilles.
The problem with coil springs mounted over dampers is the sideforce they out into the damper. This video shows the effect.
Additionally coilovers are large assemblies to package and any change in spring or damper means both have to be removed.
Read 4 tweets

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