Moderadores: Lepanto, poliorcetes, Edu, Orel
Txab escribió:Joer, los dejo solos unos dias mientras voy al Shot Show y se desgarran las medias.
Paz compañeros.
Pondré algunos de los enlaces de lo que me llamo mas la atencion
http://www.youtube.com/watch?v=s99nJGajtaM
http://www.youtube.com/watch?v=mbOUB1wNsG8
SALUDOS
CENTURION escribió:Y otra cosa, que no he visto tu mochila, siempre corta y ajustada lo más posible a los hombros, tiene que ayudarte a hacer los movimientos, derecha e izquierda con peso......tienes que moverte a un impulso y controlar tu movimiento de escape...
escorpe americano (bastidor )
la española.........[img]
http://i40.tinypic.com/20haped.jpg[/img] es una ronner alemana, tienes que subirla por arriba de a cintura.
La mía , igual de vieja que yo...
elpatanegra_10 escribió:
Mi mochila, aunque no a la vista pero esta, y bien cargada ya que para llevar todo el material,.. bufff. Eso si bien ajustada como bien dices por que para caminar campo a traves, con un mal gesto, en cuanto el peso se te vaya para un lado puede suponer una lesion y ahora a ver como te saca saca de ahi tu binomio, y como continuas la mision.
Y para el acecho que me decis??
Video: Self-Guided Bullet Spots, Steers and Nails Its Target
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By Katie Drummond Email Author January 30, 2012 | 12:20 pm | Categories: Weapons and Ammo
The U.S. military has been after self-guided bullets for years. Now, government researchers have finally made it happen: a bullet that can navigate itself a full mile before successfully nailing its target.
The breakthrough comes courtesy of engineers at Sandia National Laboratory, owned by Lockheed Martin. They've successfully tested a prototype of the bullet at distances up to 2,000 meters — more than a mile. The photo above is an actual image taken during one of those tests. A light-emitting diode was attached to the bullet, showing the amazing pathway that the munition made through the night sky.
Of course, Lockheed's been a longtime partner in the military's quest for the ultimate self-guided munition. In 2008, they scored a $14.5 million contract as part of Darpa's “Exacto”program, which sought to develop sniper rifles with guided bullets. They've also been involved in the agency's “One Shot”initiative, which is trying to develop scope-mounted lasers that can help snipers compensate for weather conditions.
Each self-guided bullet is around 4 inches in length. At the tip is an optical sensor, that can detect a laser beam being shone on a far-off target. Actuators inside the bullet get intel from the bullet's sensor, and then “steer tiny fins that guide the bullet to the target.”The bullet can self-correct its navigational path 30 times a second, all while flying more than twice the speed of sound.
The innovation involved some major changes to typical bullet design, which involves grooves to make the bullet spin and therefore fly in a straight line. Researchers had to eliminate that spinning to allow the bullets to twist and turn towards their target. Instead, they used those tiny fins — similar to those on a dart — to keep the bullet aloft while allowing it a full range of motion to navigate through the air.
Even with an ace marksman, researchers found that a typical unguided bullet — operating in real world conditions that might include crosswinds or changes in air density — would miss a target that was a half-mile away by nine meters. A guided bullet, however, could get within eight inches of that same target.
For a little more perspective, consider the world record in shooting accuracy: It currently belongs to British Army sniper Corporal Craig Harrison, who shot two Taliban operatives from a mile-and-a-half away. And Harrison performed that feat under “perfect”conditions.
Fin-stabilized projectiles, for example, could be stabilized by aerodynamic forces generated by projectile tail fins while trajectory control could be derived from lift/drag generated by canards, body flaps or a change in body geometry. In contrast, spin-stabilized projectiles could be stabilized by gyroscopic forces while trajectory control could be derived from torque produced by an internal clutch, internal off-center mass, or exploding "squibs" located around the periphery of the projectile. Various potential guidance and control technologies could include inertial navigation, radio frequency (command or beam riding), or various electro-optical technologies. In terms of EXACTO sighting technologies, planners envisioned several potential capabilities for rifle scopes, including image stabilization, socalled target lock, and multiple simultaneous magnification ("picture in a picture").
.In "descending order of importance," the highly desirable attributes identified in the BAA include:
no heavier than 46 pounds and with similar volume to current two-man sniper system (based on M107 rifle with Leupold scope, magazine loaded with 8 rounds, M551 Gold Ring observation telescope with tripod, AN/PAS 13C heavy thermal weapon sight, AN /PVS 14 monocular night-vision device, and sniper's data book - including slide rules and data cards);
secure and tamper-proof design to prevent misuse and exploitation of any portion of the system if obtained by an adversary;
more than 10-year shelf life of cartridges;
significantly reduced signature compared to the current Ml 07 sniper system;
sufficient power to support a 14-hour mission (that is, longest day);
inherently producible design;
inherently low cost;
a "fire-and-forget" round design;
greater range, target velocity and accuracy characteristics than those listed in the classified nontradeable requirements;
the ability to use current .50-caliber rifles (M82A1, XM107 or M107) without modification (except sights);
and the ability to use standard ammunition (Ball, M33).
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