Every Formula 1 roll hoop shapes in history, your favourites?

[theriusDR3]

These are every roll hoop shapes that featured in Formula 1:


Circle


Blade


Rounded triangular


Wide oval


Wide keyhole


Inverted heart


Narrow triangle


Hamster pouch

I take for rounded triangular, wide oval, narrow triangle and hamster pouch are my favourites. How about yours?

Any additions?

[n_anirudh]

The interesting question would be : what is the acceptable distortion level for "safe" engine performance and how much of this is affected by upstream disturbances - helments/roll hoops/upwash/turbulence from other cars

[bartez1000]

You describe roll hoops (the high thing that stops drivers head from being squashed when car rolls) or airbox apertures (the hole that allows air to enter engine)? The roll hoop structure nowdays is often obscured in bodywork and it is difficult to assess its shape.

[Stu]

Benetton B186-8

And in my dreams the SF23 ‘s-duct’ becomes the PU inlet….

[Andi76]

Ferrari F2001

[vorticism]

The straw shaped kind?

[Edax]