A broad rule covering a general performance gain associated with using winglets is not possible as the design and integration of the winglet to the wing is key to its potential performance gain (if it was really that easy, all planes would have them). A poorly designed winglet can even reduce...
I'm starting a new project to map the acoustic pressure field in a rectangular duct using microphones with 'coffee stirrer'-type probe tips. I need to set up a mechanism to allow me to control the depth of the probe tip in the duct and thought some type of linear actuator would be appropriate...
