that i-16 has a 4 bladed prop, ours has a 2 blade prop.. no fair 
I dont' think it has 4 blades. I don't think any did.
It's an optical illusion because of the way he's running his prop while idle.
In the fly-by, when he's buzzing the fields, it definitely looks like 2 prop blades going 'round and 'round, not 4.