Quote:
Originally Posted by freebeard
Now that I've thought about it: upside down, *in water*, with hydrogen bubbles.
|
1) 3-D underwater tow tests are performed with the model attached to an overhead 'sting', supported from an overhead gantry-crane, which travels the length of the tank, wheels of the model 'rolling' in contact with the tank floor.
2) The 'sting' may contain six piezo strain gauges from which pitch, roll, yaw, front lift, rear lift, and axial drag forces can be captured.
3) At Texas Tech University's tow tank facility, Ford Motor Company chose a 1/3rd-scale model for their Taurus testing, at a cost of $68,000.
4) A relative of mine, Paul Bowers, of Bower's Plastics, constructed the different noses for the model testing, designed by Jack Telnack, Global V.P. of Design at Ford, groomed by Alex Tremulis, former chief of advanced design at Ford.
5) Tufts can be used in underwater testing.
6) Food coloring emitted from pre-drilled orifices in the surface of the model.
7) When the water becomes clouded by the food coloring, chlorine injection quickly clears the water. Chlorine content is carefully monitored to protect the safety of the SCUBA divers who must descend to the bottom of the tank, to alter the model for each run.
--------------------------------------------------------------------------------------
8) Hydrogen bubbles would be limited soley to aerodynamic testing, as the mass of the hydrogen gas, plus the mass of the 'bubble' just equals the mass of the air. Surface tension of a 'bubble' would be destroyed underwater, with the gas rising to the surface.
-------------------------------------------------------------------------------------
9) Submarines tested underwater at the US NAVY's, David Taylor Model Basin, in Carderock, Maryland, have also been tested, since 1953, at NASA's Langley, Virginia wind tunnel facility, where tufts and smoke can provide flow visualization which cannot not be found in the water ( Project: USS Albacore ).