Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

Just wondering what the advantage was to having a 4 blade impeller vs a 3 blade... All the new Ariens model have 3 blade from the smallest to the largest (1336)...Some of last years models have the 4 and even 6 blade. How does this impact the performance of the machine??? DO they spin it faster with the 3 blades, or is the impeller redesigned so that the 3 blade works just as well as the 4 blade??