Motor vehicle carbs can be very much affected by icing. Still have fond memories of having to keep stopping and thawing out my ancient VW Jetta on motorway runs whenever the ambient dropped below about 5 degrees.
VW's solution was to have 2 air intakes, one at the front of the car, one around the exhaust manifold. Selection was controlled automatically by a flap / temperature sensor in the intake system. If this failed in winter, you very quickly knew about it.
No worries these days, my intake air comes via a luverly big supercharger & engine management system - it'd be just the job for all those flying school 152s.
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Looks like I picked the wrong week to quit pruning.