I saw propeller desing from instructable and I made it using those steps as a hobby
I've seen another video from youtube in which propeller is used as a cieling fan blade so I decided to make the same with my own desing and Ideas . I used only scrap materials which I got from workshop for free of cost (Except motor and speed controller).
You can get enough details about propeller design under this blog:
Thanks to "Michael Duffy"
Step 1: Materials Required
Paints and primer
15 CM Piston
GI tube to hold the entire assembly
old connecting rod to hold the motor and axis
Step 2: Motors :
I used A/c outdoor unit's motor as a prime mover I used two to maintain the C.G on the Axis of the fan.
Step 3: Driving Mechanism
100 cc bike's timing chain and spurs are used to drive the propeller it's simple chain drive mechanism and used for reduce the speed
Step 4: Speed Controll
I want 100 to 150 RPM but the motor's No load speed is almost 1000 RPM also electronic speed controller(It's hidden on the piston) is used to reduce the speed as well as match both motor's no load speed
Step 5: Painting and Assembling
I used spary painting. Two coats of painting and two coats of primer
Truck's piston is used to cover the upper potion
Step 6: Propeller Desing
I followed all the steps given in the "Wood Propeller Fabrication" blog and made the propeller and painted