Wind Tunnel Development
The following video shows wind tunnel tests on a 737 model its wing tips modified to have double winglets, to direct the generated vortcies away from the aircraft in order to lessen the generated regions of negative pressure behind the plane which case an increase of drag.
Applying sensors to the wind tunnel model to measure all the changing flight conditions the aircraft is exposed to during flight
Making the wind tunnel model, the video provided by EMBRAER for the KC-390 model. The power of the CNC machines is mind taking then the process of surface mapping of the produced model aircraft to check its accuracy, that is done using a robot arm.
Testing a refueling probe in a wind tunnel. Lots of videos show the problems occurring during air refuling to overcome these kinds of problems wind tunnel tests can help in knowing the optimum speeds of the refuling aircrat and the the refueled one in addition to the affects of cross winds. Different flight speeds affect the refueling basket, the. Finding the best place for the refuled aircrft to place the extending probe can be of great help to distance it fomr regions of turbulence and in addition to regions suction such as jet intakes. The aircaft model is put together and then it can be seen that a hydrolic arm is used to to control the aircraft pitch. In addition to that the model even has the control surfaces.
Aircraft Stability tests in a wind tunnel
Drop test of a X-15 model in a wind tunnel, this video gives some hints on the encountered dangers when dropping objects from a flying aircraft. So by using wind tunnel tests the objects initial response comes of importance. The objective as seen is to drop the object without causing any damages to the aircraft.
Better safe than sorry, use a wind tunnel. This can be seen how lack of planning can cause disastrous consequences.
Testing a model at different pitch angles to see the stream lines created on the model surface. A compuational fluid dynamics simulation of the model plane is done first, then a special type of paint is applied to the aircraft surface then once air is blown over its surface the paint mimics the occurring flow pattern occurring over the aircraft surface. This shows how accurate the numerical modeled against experimental tests. It is nice to see how they use the wind tunnel model and its response to the flow and from their they position the tail wings at the best locations. The other
Wind Tunnel Providers
Experimental Wind Tunnels
Wind tunnels are very essential for the study of airflow patterns. To know their main contribution to flight you will need to see the wright brothers wind tunnel they used.
Small Sized Wind Tunnels
These are usually available at universities and technical colleges. The cannot fit any large objects but can be used for studying specific airfoil profiles and small scale models of aircraft and cars.
Medium Sized Wind Tunnels
These are found at universities.
Large Sized Wind Tunnels
These are found at specific universities and scientific research institutes in addition to well known private companies. The can at some point fit a full sized model into them. The running costs for such facilities are usually extremely high. Usually they are made specifically for the client.
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