The Blizzard 84" unit has a 28" diameter fan and their 74" blower has a 24" fan. So would that give a significant in performance for the bigger blower?
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Yes it will throw more snow but the tractor has to have enough engine power to maintain 540 RPM in all conditions.
The larger fan is always a good idea but the bigger issue is the gearbox rating and engine frame size as relates to the torque created and delivered to the gearbox that spins the impeller and open cross auger that feed the impeller paddles as the snow is pushed into it with the tractor.
Some of the Kubota members and other mule owners invested in wider snow casters and just go slower so they can clear snow pack in fewer passes. So its a give and take issue; they opted for a wider unit and they just go slower on the first pass in deep snowpack or when cleaning snow fall in general.
If they being RAD and others invested in a solid cross auger for the two stage units like the Berta in the example they would throw snow further as the snow would be cut in to its smallest part before it entered the impeller housing and was cast away.
If you look at the small rear mount Berta snow caster for small tractors it is built for heavy alpine snows and it is equipped with flow gates to keep the snow in rather than let it be pushed away as
the open cross augers do without serrations in the auger flighting to cut the snow up do even with light snow falls.
The unit is very well built and meant for heavy wet snows and ice and has solid cross augers with serrated flighting to cut the snow up as it pushes it to the impeller.
the two sheilds/guards/doors that are above the cross auger prevent snow from be cast out and hitting a 2 or 4 legged pedestrian.
