aeronautical engineering problem!
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- Project Question: aeronautical engineering and automotive engineering
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aeronautical engineering problem!
hi i am a student of mechanical engineering and i got a project of making a small wind tunnel(open circuit) i just don't want to use sensors to measure drag and lift i including my friends can't bear the expenses of using sensors ! is there any other way of measuring drag and lift?kindly answer me because all the work has been done......i mean we have complete our all homework about what we do in the manufacturing phase but.....we can't use sensors....and only cause of that......we haven't enter in the fabrication phase....?please do help me!!! thanx in advance
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Re: aeronautical engineering problem!
Hi,
Here are some ideas to consider:
http://video.google.com/videoplay?docid ... 2106078468#
http://www.morpheus.umd.edu/research/fi ... -dist.html
http://www.freepatentsonline.com/6055869.pdf
http://www.globalspec.com/reference/312 ... ic-Systems
http://ctr.stanford.edu/Summer06/kitsios.pdf
http://www3.interscience.wiley.com/jour ... 1&SRETRY=0
http://www.iop.org/EJ/abstract/0957-0233/17/10/022
http://www.wipo.int/pctdb/ja/ia.jsp?ia= ... SPLAY=DESC
http://pages.slu.edu/faculty/gbramesf/LowRe.pdf
http://www.interactiveinstruments.com/e ... jetstream/
http://books.google.com/books?id=hV3b6J ... er&f=false
Look at this project:
http://www.ceeo.tufts.edu/robolabatceeo ... bpages.pdf
http://www.ceeo.tufts.edu/robolabatceeo ... al_asm.pdf
And this thesis:
http://scholar.lib.vt.edu/theses/availa ... sis_r2.pdf
The bad news here is I think you will have to use sensors to measure lift and drag. The good news is they may not have to be expensive. The customary method seems to use strain gauges and A/D computer interface using a wheatstone bridge circuit
The only thing I know that is responsive to your question is attaching a string to the wing to act as a stall indicator..
I hope this helps, even though it is not the kind of answer you were looking for.
Best regards,
Barrett L. Tomlinson
Here are some ideas to consider:
http://video.google.com/videoplay?docid ... 2106078468#
http://www.morpheus.umd.edu/research/fi ... -dist.html
http://www.freepatentsonline.com/6055869.pdf
http://www.globalspec.com/reference/312 ... ic-Systems
http://ctr.stanford.edu/Summer06/kitsios.pdf
http://www3.interscience.wiley.com/jour ... 1&SRETRY=0
http://www.iop.org/EJ/abstract/0957-0233/17/10/022
http://www.wipo.int/pctdb/ja/ia.jsp?ia= ... SPLAY=DESC
http://pages.slu.edu/faculty/gbramesf/LowRe.pdf
http://www.interactiveinstruments.com/e ... jetstream/
http://books.google.com/books?id=hV3b6J ... er&f=false
Look at this project:
http://www.ceeo.tufts.edu/robolabatceeo ... bpages.pdf
http://www.ceeo.tufts.edu/robolabatceeo ... al_asm.pdf
And this thesis:
http://scholar.lib.vt.edu/theses/availa ... sis_r2.pdf
The bad news here is I think you will have to use sensors to measure lift and drag. The good news is they may not have to be expensive. The customary method seems to use strain gauges and A/D computer interface using a wheatstone bridge circuit
The only thing I know that is responsive to your question is attaching a string to the wing to act as a stall indicator..
I hope this helps, even though it is not the kind of answer you were looking for.
Best regards,
Barrett L. Tomlinson
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Re: aeronautical engineering problem!
Seems like you may be able to use a spring as a sensorless way to measure lift. Somehow you'd have to measure how much the spring is stretched (or compressed, depending on where it's located) and then use the spring constant to determine the force.
Mike
Mike
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Re: aeronautical engineering problem!
Measuring lift and drag in a home-made wind tunnel is not difficult, nor expensive.
I designed a system for our local junior school that uses inexpensive postage scales that you can purchase at any office supply store, or even Target. They're usually less than $20.
To measure lift, you attach your model to a slender, light weight rod, which pokes through the bottom of your test section. You attach a weight to the end, which is heavier than your test specimen plus the amount of lift you expect it to develop. You put this on the postage scale. Note the weight. As your test specimen lifts, subtract the resulting weight from the initial weight.
You can measure drag the same way, but you'll need a bell crank mechanism to convert the horizontal force into a vertical force. Being a mechanical engineering student, you should be able to manage that easily.
Good luck.
I designed a system for our local junior school that uses inexpensive postage scales that you can purchase at any office supply store, or even Target. They're usually less than $20.
To measure lift, you attach your model to a slender, light weight rod, which pokes through the bottom of your test section. You attach a weight to the end, which is heavier than your test specimen plus the amount of lift you expect it to develop. You put this on the postage scale. Note the weight. As your test specimen lifts, subtract the resulting weight from the initial weight.
You can measure drag the same way, but you'll need a bell crank mechanism to convert the horizontal force into a vertical force. Being a mechanical engineering student, you should be able to manage that easily.
Good luck.
Ed Neu
Buffalo, MN
Buffalo, MN
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- Occupation: student
- Project Question: aeronautical engineering and automotive engineering
- Project Due Date: 22feb2010
- Project Status: I am just starting
Re: aeronautical engineering problem!
thnx guyz u helped me alot!