Just curious, does anyone know when the 2 car allowance/limit per team came into effect and the history surrounding that rule. Obviously back when F1 started reliability must have been a major issue and 2 cars would double the chances of finishing the GP especially when there were just a few each season back then although the stakes were much higher for the drivers.
The last team to field three cars in a race was Renault in 1985, when they had a third car for Francois Hesnault at some races, usually with an early onboard camera fitted. I believe single-car entries were banned after 1991, except in instances of force majeure (for example, Williams entered one car at Monaco in 1994 after Senna was killed). This is all off the top of my head, though.