The Raptor 90 G4 has several new and interesting design features, one of which is the all metal fan. As you can see in the photo, this is a completely different design fan than we have ever seen before. It’s hard to describe in words, other than to say it’s hollow and does not have the usual internal fins to move the air. I would imagine from its design that this new fan will move more air for better engine cooling, while using less power to operate.
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