Let's talk about fixed-blade fans

I have used the same aluminum 7 blade flex fan since 1974 with out a shroud or a problem. I use a 2 inch spacer so the fan sits about 1 1/2" to 2" from the radiator and a 160* thermostat and can run in the worst traffic and heat and my motor NEVER exceeds 190*-195* and usually sits right on 180*