Thanks for sharing setbacks as well as successes! Many instructional videos make it seem like projects always go as planned from the start.

I must clarify! What I meant by losing energy is energy transformed into another type of energy which we can't use or isn't useful to us. "Nothing is lost, nothing is created, everything is transformed." of course

Very well done. One thing to keep in mind is that the way you have the load cell and ball mounted, you won’t be measuring only the drag force. If you put pressure on the top or bottom of the ball, the arm it’s attached to will apply a torque to the load cell. That means you will also be measuring lift forces, and of course the weight of the ball. Because a ball is symmetric this shouldn’t be an issue as long as the flow is perfectly laminar and uniform (which doesn’t even happen in professional wind tunnels). The first sensor you tried would give you a more precise measure of drag but the load cell is overall a more effective force measuring device. I would love to see part 2. Lastly, the load cell uses something called a strain gage to measure the change in length of the load cell at very very small increments. This in effect changes the length of the tiny wire inside the strain gage and changes its resistance. Using material properties and math, this is translated as a force proportional to the strain in the aluminum structure of the load cell.

The straw idea really wasn't bad. But the length may have played into poor flow. Also, a circular design would help, particularly on the fan end. Drone pilots have been able to get as much as a 90% increase in thrust with a carefully shaped and very tightly ducted propeller.

This is great! What kind of sensor was used? Can you help me with how to measure the lift and drag . How do you measure the drag difference . can u describe in detail how to do it including the materials you used. It would be a great help I'm trying to finish a high-school project

Hey, may i know what motor are u using for the fan?

Glad i found this video ,the basic concept remains the same of making laminar air flow ,i just want to ask ,whether there was any sound difference before the straw stacking and after the straws in place for laminar flow ...as i am looking for reducing sound of my kitchen chimney which is very noisy ,and i though it must me turbulence created around sharp edges is making noise so ,will maki the entry and exit of the chimney laminar ,thus reducing the noise ...pls suggest

Could you give the specifications of motor,force coil and others

Thanks for the video! Would U mind letting me know the type of fan U used for the driving section of the wind tunnel? It appears pretty strong regarding its size :)

Could you tell me what brussless motor ( kv, voltage and amp) do you use for fan?

Do you do some calculations for fan blades and wind tunnal duct

Where is the 2nd part? 😧

Whaooo !! When is part 2 coming out

Link to the music?

the language on the cardbard 0:50 is Korean

The authors have two wrong scientific approaches: researching the creation of Lift force and Low pressure at upper side of the wing, relative to the ground surface and Earth. I explain the aerodynamic cavitation and existence of Lee side aerocavern, and creation of Aerodynamic force.

I don't think he straws are not necessary in an open design like that. Your model is too big for the tunnel, will give false readings.

oh the material are all Korean

한국인인가요?? 사과박스 글씨가 한글이던데 ㅋㅋㅋ