Aug 2, 2012
bcrnews.com - Lyle gets the units from a company in Missouri. Each unit has been tested and engineered to withstand an EF-5 tornado with ground level 250 mph wind speeds. They are tested at the Debris Impact Center at Texas Tech University where laser-guided projectiles are shot from an air cannon at speeds estimated at 50 mph — greater than the EF-5 tornado.
tags: Texas Tech in the News