I think many of us are aware that I am not only NOT an engineer, but lack many engineer-like skills. Yet, I watched this short video on the discussion and destruction of the Alfa roll hoop at Silverstone, and just shook my head:
www.youtube.com/watch?v=tVXCwuvQz1U
A single-post roll hoop is a "thing" in F1?? Really? We go all-in on the halo, but we "glue" on (if indeed it is glued on) a single post roll hoop and expect it to perform in a rollover (which, almost by definition, means that the angle of impact of the bar is changing relative to the ground it is travelling upon) as the accident unwinds? Yes, Zhou was saved by the halo, but only because the halo did the job that the basic rollbar structure failed to do. Alfa ought to be taken to the woodshed on this.
I post this as there is talk in our FF paddock of adopting a halo structure on our cars. There was a competitor at a race recently with a retrofitted halo on a FC/Libre car that started a few "conversations". I don't intend to get that argument started, but only illustrate that the folks on the side of the halo should be cautious in citing this recent incident as definitive proof that the halo is needed at the amateur level.
cheers,
BT