Things You'll Need
Instructions
Put on your leather gloves. When cutting metal, sharp edges can be created.
Measure your metal strip length-wise using your tape measure. Locate the exact middle and mark it with a marker. Lets assume your propeller is 1 foot long, and 2 inches high.
Measure your strip width-wise. Locate the exact middle and mark it directly in line with the "length" middle that was measured in the first step. You should have one marking now that is directly in the middle of your propeller. This will be attached to your motor source. This will insure that your propeller spins evenly. If your propeller is 1 foot long and 2 inches high, you will mark the propeller with 6 inches on both sides and with 1 inch evenly on the top.
Measure starting from one end of your propeller to the center of the strip where your middle mark is. Move away from the center mark a short distance and mark the spot you chose. If your are looking at the center of your propeller that you marked, go about 1 inch away from the center on both sides and mark this. This is where your propeller will be folded.
Cut your metal starting from the side directly in line with your propeller mark to the propeller mark.
Cut your metal starting from the side directly in line with your propeller mark on the opposite side of where you made your first cut.
Line up one of your cut sides along the edge of a table and fold it downward in a straight line. It should fold exactly halfway across the width of your propeller.
Flip your propeller over and fold the other side along the table. You should have a piece of metal now that has one edge on one side folded to the front, and one edge on the other side folded to the back.
Drill a hole in the absolute center of the propeller and affix this to your motor. Your hole should be about the size of the axle that will be powering it. You now have a working propeller.