2007 JROTC Ball2007 JROTC Ball
N.M. SLS 2006N.M. SLS 2006
Barksdale 20062006 Barksdale AFB
Air Show
San Antonio 20062006 San Antonio Trip/Competition
ROTC Ball 20062006 JROTC
Ball Pictures
Summertime 2005 Summer/Citadel/
Pensacola 2005

Gilmer High School Air Force 

Junior ROTC - TX20027

Home of the Blue Knights




Pensacola 2005 Pensacola 2005
2005 Barksdale Air Show 2005 Barksdale AFB
Air Show
Houston Cy Ridge Trip Houston Cy Ridge
San Antonio Trip Mar 05 San Antonio
Slide Show 2005 JROTC Ball
Tributes to Our service men and women, past and present Tribute Page



Sonic Boom

Many people have heard a sonic boom but few have seen one. When an airplane travels at a speed faster than sound, density waves of sound emitted by the plane cannot precede the plane so they accumulate in a cone around and behind the plane. When this shock wave passes, a listener hears the accumulated sound waves all at once, causing the phenomenon known as a sonic boom. Sometimes when a plane accelerates just to the point that it breaks the sound barrier, an unusual cloud will form around or behind the plane. The origin of this cloud is still debated but a leading theory is that a drop in air pressure at the plane described by the Prandtl-Glauert Singularity occurs so that moist air condenses there to form water droplets which create the cloud. Above you see a McDonnell Douglas F/A-18 flown by a member of the U.S. Navy Blue Angels Demonstration Team, photographed just as it broke the sound barrier during a show at Pensacola Beach, Florida on July 2, 2005 which was attended by a group of cadets from Gilmer's JROTC program.