dinizintheoven wrote:What I want to know is why there were constructors in the 80s - mainly - who appeared to see the roll bar as some kind of last minute add-on, and would bend a few steel tubes into place and bolt it on top of the engine cover, even as late as 1989. Coloni and AGS spring to mind in particular, and we all know how that ended. Now, Monsieur Streiff, if you'd like to trundle your wheelchair over to this microphone to give us your views...
Was this really the case, though? Mario, it's over to you.
Well, one element that would have contributed to that was the fact that, over the course of that decade, the rollover protection requirements effectively remained static - it's not really until the 1990's that the FIA finally began beefing up the cockpit protection requirements.
In many ways, even many of the major teams did not really put that much effort into that area - an example of that might be McLaren, where the roll hoop of the MP4/3 from 1987 didn't really evolve at all beyond what they were using back in 1981 on the MP4/1.
Really, for most teams, the types of roll hoop design that was common practise at the time were really just variations of designs that mostly dated back to the 1970's, or perhaps even earlier - the roll hoop on the Lotus 99T, for example, wouldn't have looked out of place on the Lotus 49, in part because the regulations on roll hoop design had remained stagnant for quite a long time.
A lack of regulatory action is definitely one issue in that regard - if there is no demand from the regulator for an improved system, then there is nothing to drive the teams forward and so they will continue to use a variation on an existing design that meets the minimum regulatory requirements.
A second aspect is that, in the 1980's, the introduction of turbocharged engines effectively negated the need for an airbox above the drivers head - the shift to turbos lead to the trend of having sidepod mounted snorkels instead, which was the preferred option for packaging reasons.
With the need for an airbox removed, the designers are now going to want to have a relatively insubstantial structure above the drivers head that creates a relatively small turbulent wake, which therefore improves the airflow over the rear wing (and, as a small secondary advantage, shifting the centre of gravity downwards, but that is not the main incentive).
In that instance, a relatively simple roll hoop along the lines of what AGS were using would, in theory, have a small aero advantage, and ultimately the teams are going to prioritise potential performance avenues over safety if they think they can get away with it.