# Tag Info

Accepted

### What are some specific benefits of cryogenic wind tunnels?

Short answer: A cryogenic tunnel works by taking advantage of the different properties of nitrogen gas at cryogenic temperatures as compared to the properties of air at normal ambient conditions (...
• 234k

### Why does this curved wind tunnel rotate?

While superficially similar, this curved windtunnel solves a very different problem from a straight windtunnel. A straight windtunnel is used to study steady flight without needing a very long ...
• 13.4k

### Why does this curved wind tunnel rotate?

Here you'll find his paper about the wind tunnel. Apparently the rotation has been introduced in order to compensate for the Coriolis effect.
• 13.5k
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• 20.6k
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### How can I calculate the TOTAL drag of the ENTIRE airplane?

EDIT Doing the math at a speed of 149kts (as suggested by @RobertDiGiovanni) and a weight halfway between EW and MTOW, gives a total drag of some 308lbs which should be a reasonable value. Try with: ...
• 13.5k

### Why does this curved wind tunnel rotate?

An automobile with front steering pivots on its rear wheels. This may cause a significant amount of side lift in front from a change in the relative wind, making it more difficult for the tires to ...
• 20.6k
Accepted

### How to calculate the drag on an airfoil from momentum equation (Fundamental of Aerodynamics 5th edition, J.D.Anderson)?

You are basically asking two questions here: How do we choose an appropriate control volume? What effects does the physical geometry of a wind tunnel have on our ability to make accurate measurements?...
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