4 blades carry a load better, can run at a higher X dimension, and have faster cruising speeds than a 3 blade. (Normally)
I'm running a 20p Razor 4 by Mark Croxton and I'm seeing roughly a 5-8% slip depending on speed.
I asked him about his 3 blade Razor 3 and he said I wouldn't like it for my application. Which I told him I wanted a high cruise speed.
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