I and another college student are currently building one for a school project. We are using the Bell-Mehta 5th degree polynomial as well for our inlet, but are having trouble finding materials to fit the curve we want. What materials did you use to ensure it was accurate?
Hello! I am also in high school and my friend and I are planning one out. My question is how would you construct the contraction cone part with the curve going on two axes going narrower and curving in? Thank you for looking this over.
Hey there, I found the curve that I needed, then had a friend print out the curve on large sheets of paper that were to-scale. I then taped this to mat board and cut them out by hand. I did this four times, then taped and glued them together so they all curved inward. Good luck!
To anyone looking for more documentation, have a look at my instructables page: www.instructables.com/Subsonic-Wind-Tunnel/ . Otherwise, contact me at jamespkwadhwani@gmail.com. Thanks for watching!
is it too much you ask of you for contact info so i could get a list of materials?? This is very interesting and me and my best friend just out of high school as well are trying to build our own
Hey James, could you share some details on how you constructed the load arm? and is there an off the shelf sensor you used to input the data into the microcontroller?
You could use cardboard or wood, use a smaller fan, and have a large contraction cone to draw in air. Additionally, you could use a 2d airfoil system that is attached to each wall of the test section. Good luck!
Quite impressive you built this in only two weeks. What about adding advanced visualization techniques like pressure sensitive paint, IR thermography, and shadowgraph? Might not show much but create pretty pictures to impress people. Seems the tunnel overall fairly quiet, does it add much heat to the room after long duration of running?
Have a look at my instructables page: www.instructables.com/Subsonic-Wind-Tunnel/ I don't have CAD files, but I do have instructions for building. Good luck
Have a look at my instructables page: www.instructables.com/Subsonic-Wind-Tunnel/ Otherwise, feel free to email me with questions at jameskwadhwani@gmail.com
Hey, thank you for sharing such a great know and your build, we have one wind tunnel at our institute but the equipment is not working in it for data collection, could you just guide me how you used load cells for measuring the lift and other parameters and how you changed angle of attack, I know it's your design you can't share details, if you just guide me or any sources that I should follow for it it'll great and grateful to you. :) ..
Sorry for taking so long to respond. I used load cells to measure lift/drag and had a servo that changed angle of attack. Not sure how you would measure lift/drag without load cells
Thanks man, a friend of mine and I are also building a windtunnel for measuring drag and lift on cars. It is also a high school project, but compared to you pretty primitive :P. Thanks for showing us the lift measuring device. That gave us some pretty good inspiration. Keep up the good work man!
This is great! I was wondering if you can explain the circuitry part and how I can get the measurements of lift and drag the way you did. What did you use and how did you put it together. It would really be great help I'm also working on a project and need help as soon as possible. Thanks
Hi, thank you very much for sharing this video. I'm currently working on an extended essay regarding angle of attack and lift. I was wondering if there were any sources/guidelines you followed to build this wind tunnel?
Hi Sunid, I referenced many sources throughout this build. Mainly however I referenced the "Coggan Low-Speed Wind Tunnel" by Andrew R. Coggan, and took much inspiration from his design.
Thank you so much for sharing. I’m making an air tunnel for a class I’m taking right now and this was able to help me figure out something I wasn’t able to before. Great work man keep it up!
