Defense

August 7, 2013

AEDC’s Range-G in operation for 50 years

David Brown and Troy Perry installed a slug projectile with a pitch motor into the 8-inch bore diameter barrel of AEDC’s Range-G two-stage, light gas gun at a velocity of 8,200 feet per second.

 

Since the summer of 1963, when the Arnold Engineering Development Complex’s Hypervelocity Ballistic Range-G came into operation, the facility has tested items for boundary-layer studies to hypersonic plasma mitigation studies.

The range is used to conduct kinetic energy lethality and impact phenomenology tests. It is the largest two-stage, light-gas gun system in the U.S. that provides “soft launch”, minimized acceleration loading, capability to launch extremely high-fidelity missile simulation at hypervelocity speeds.

Range-G is capable of launching projectiles at velocities up to 23,000 feet per second. Projectiles up to eight inches in diameter are launched into a 10-foot diameter, 930-foot long instrumented tank that can be maintained at pressure altitudes from sea level to 225,000 feet.

The use of 3-D finite-element analysis software, ABAQUS, coupled with the AEDC light-gas gun code provides a seamless projectile design capability.

The unique ability to duplicate real flight, although at subscale, makes it the ideal facility for a variety of testing requirements such as, aerodynamic, aerothermal heating assessments, wake physics and material phenomenology.

 

Final step is the insertion of powder charge into breech launcher. In sequence, powder compresses hydrogen, hydrogen drives piston, piston compresses hydrogen in pump tube which accelerates model to desired velocity. The free-flight models will be fired through the 1,000-foot range at velocities up to and exceeding Mach 20. The test unit, 1,000-ft Hypervelocity Range-G, is part of the von Karman Gas Dynamics Facility at the Arnold Engineering Development Complex.

 

Laser-illuminated photography was developed at the Arnold Engineering Development Complex to study ablative effects on a 12,000 mph free-flight projectile in the Center’s 1,000-foot hypervelocity ballistic range. The technique provided a photographic exposure equivalent to 20 billionths of a second.




All of this week's top headlines to your email every Friday.


 
 

 

Headlines September 2, 2014

News: Debris yields clues that pilot never ejected - When investigators were finally able to safely enter the crash site of an F-15C “Eagle” fighter jet on the afternoon of Aug. 27, they made a grim discovery that concluded more than 30 hours of searching – the pilot never managed to eject from the aircraft.  ...
 
 

News Briefs September 2, 2014

Pentagon: Iraq operations cost $560 million so far U.S. military operations in Iraq, including airstrikes and surveillance flights, have cost about $560 million since mid-June, the Pentagon said Aug. 29. Rear Adm. John Kirby, the Pentagon press secretary, said the average daily cost has been $7.5 million. He said it began at a much lower...
 
 

Unmanned aircraft partnership reaches major milestone

A team of research students and staff from Warsaw University of Technology have successfully demonstrated the first phase of flight test and integration of unmanned aircraft platforms with an autonomous mission control system. The demonstration marks a significant milestone in a partnership between the university and Lockheed Martin that began earlier this year. This is...
 

 

Raytheon delivers first Block 2 Rolling Airframe Missiles to US Navy

Raytheon delivered the first Block 2 variant of its Rolling Airframe Missile system to the U.S. Navy as part of the company’s 2012 Low Rate Initial Production contract. RAM Block 2 is a significant performance upgrade featuring enhanced kinematics, an evolved radio frequency receiver, and an improved control system. “As today’s threats continue to evolve,...
 
 
Courtesy photograph

Two Vietnam War Soldiers, one from Civil War to receive Medal of Honor

U.S. Army graphic Retired Command Sgt. Maj. Bennie G. Adkins and former Spc. 4 Donald P. Sloat will receive the Medal of Honor for actions in Vietnam. The White House announced Aug. 26 that Retired Command Sgt. Maj. Bennie G. A...
 
 

Sparks fly as NASA pushes limits of 3-D printing technology

NASA has successfully tested the most complex rocket engine parts ever designed by the agency and printed with additive manufacturing, or 3-D printing, on a test stand at NASA’s Marshall Space Flight Center in Huntsville, Ala. NASA engineers pushed the limits of technology by designing a rocket engine injector – a highly complex part that...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>