Aim:

To observe how propeller design and motion create lift and rotation, similar to how drones fly.

Requirements:

• Paper (A4 or lightweight sheet)

• Scissors

• Pin or paperclip

• Pencil or straw

• Stopwatch or phone timer

• Ruler

• Optional: notebook for recording results

Safety Tip:

Be careful when cutting paper.
Drop your propeller in an open space — not near fans, sharp objects, or faces.

Steps:

Step 1: Cut the Base

Cut a paper strip about 15 cm long and 2 cm wide.

Step 2: Make the Blades

Fold one end upward and the other end downward — this forms two opposite blades that will catch air.

Step 3: Attach the Center

Use a pin to fix the strip through a pencil eraser or top of a straw so that it spins freely.

Step 4: Test It

Hold the setup high and drop it from shoulder height.
Observe how it spins on the way down — that rotation represents how real propellers work.

Step 5: Experiment

Try changing:

• Blade angle (more tilt = more lift but slower fall)

• Blade length (longer blades = more air resistance)

• Material weight (heavier paper = faster fall)

Record your observations in a table:

Theory Connection

• When you drop your paper propeller, air pushes against the blades.

• This makes it spin and stay longer in the air — just like drone propellers pushing air down.

• The faster and more balanced the spin, the more lift is generated.

If one blade is bent unevenly, the propeller tilts — teaching how balance affects flight stability.