Here’s the basic design for an air vortex cannon, a simple device that overcomes a major barrier to throwing air: applying force to a bunch of air molecules to get them to move in a single direction.

The Vortex 10x50 Crossfire HD are roof prism binoculars, which means a relatively compact and space-saving design of two tubes joined by a small hinge in the center that houses the optics and the ...

But look past its rugged exterior and you get a device with so-so specs. Verykool says the RS90 Vortex (the phone's official name), is the most powerful phone in its lineup, but that's not saying ...

Design: Roof Prism Magnification: 8x Objective lens: 36mm Eye relief: 0.7-in (18 mm) Weight: 10.7 oz (303 g) Dimensions: 5.4 / 2.3 / 2.5-in (137 / 58 / 64 mm) The Vortex Solo R/T has two twistable ...

The Vortex R/T monocular is a capable performer with a lightweight, tough design, impressive image clarity and good low-light capabilities, although it has a stiff focus that may improve over time.