make your own boat propeller
A ship’s propeller works by thrusting an area of water away from the main body of the ship, thereby producing a reactive force that moves the boat forward. make your own propeller driven boat! you will need:. Propellers are the most important part of a boat's propulsion system because a boat engine needs a propeller to move the vessel through the water. however, propellers are expensive. luckily, with the proper tools and steps, you can make your own for the fraction of the cost of a new one.. Your procedure would be almost perfect if you make the hole through the width of the body, not perpendicular, but you should reinforce it before. you could successfully use this method to make an efficient, cheap and fast propeller. obviously, you must redefine the blade's profile, and make both blades simultaneously.. 
make your own boat propeller First you must have full size cross sections (about 10, from root to tip) of your propeller. there are tools online for designing propellers, but you will need some cad software to create the drawings and 2-d cross sections. i used catia, but any 3-d modeling software will do.. Weld the propeller to the bottom of the rod, making sure that it is facing out and perpendicular to the rod. step 4 bend the other aluminum rod around 1/3 the way down by 45 degrees with your hammer, and weld the longer end about 2 to 4 inches from the propeller..
