Take every other corner tip and bring it to the exact center point. Do not crease these folds; keep them rounded so they catch the air.
For hobbyists making scale planes, you can "laminate" paper to act like wood. Propellers.7z
Fold the square diagonally from corner to corner both ways to create an "X" crease. Take every other corner tip and bring it
Cut along each crease from the corner toward the center, but stop about an inch before you hit the middle. Propellers.7z
Add a paperclip to the bottom for weight. When dropped, it will spin like a helicopter.
This is the fastest way to make a propeller that spins when you blow on it or run with it.
Take every other corner tip and bring it to the exact center point. Do not crease these folds; keep them rounded so they catch the air.
For hobbyists making scale planes, you can "laminate" paper to act like wood.
Fold the square diagonally from corner to corner both ways to create an "X" crease.
Cut along each crease from the corner toward the center, but stop about an inch before you hit the middle.
Add a paperclip to the bottom for weight. When dropped, it will spin like a helicopter.
This is the fastest way to make a propeller that spins when you blow on it or run with it.