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Rifling is the helix-shaped pattern in the barrel of a gun or firearm, which imparts a spin to a projectile around its long axis. This spin serves to gyroscopically stabilize the projectile, improving its aerodynamic stability and accuracy.
Rifling is described by its twist rate, which indicates the distance the bullet must travel to complete one full revolution, such as "1 turn in 10 inches" (1:10 inches), or "1 turn in 30 cm" (1:30 cm). A shorter distance indicates a "faster" twist, meaning that for a given velocity the projectile will be rotating at a higher spin rate.
A combination of the weight, length and shape of a projectile determines the twist rate needed to stabilize it – barrels intended for short, large-diameter projectiles like spherical lead balls require a very low twist rate, such as 1 turn in 48 inches (122 cm). Barrels intended for long, small-diameter bullets, such as the ultra-low-drag, 80-grain 0.223 inch bullets (5.2 g, 5.56 mm), use twist rates of 1 turn in 8 inches (20 cm) or faster.
In some cases, rifling will have twist rates that increases down the length of the barrel, called a gain twist or progressive twist; a twist rate that decreases from breech to muzzle is undesirable, as it cannot reliably stabilize the bullet as it travels down the bore. Extremely long projectiles such as flechettes may require impractically high twist rates; these projectiles must be inherently stable, and are often fired from a smoothbore barrel.
Main article: Rifle
Muskets were smoothbore, large caliber weapons using ball-shaped ammunition fired at relatively low velocity. Due to the high cost and great difficulty of precision manufacturing, and the need to load readily from the muzzle, the musket ball was a loose fit in the barrel. Consequently on firing the ball bounced off the sides of the barrel when fired and the final direction on leaving the muzzle was unpredictable.
Barrel rifling was invented in Vienna at the end of the fifteenth century by Jaspard Zoller. In 1520 August Kotter an armourer of Nuremberg improved upon the work of Zoller. Though true rifling dates from the mid-15th century, it did not become commonplace until the nineteenth century.
"There is a principal which is a bar against all information and proof against all arguments, and which cannnot fail to keep a man in everlasting ignorance. That principal is, contempt, prior to investigation."
~ Herbert Spencer
It would seem that the "cognitive dissonance" and the delusion is on the part of some debunkers, who in my view, given the evidence, are in fact deluding themselves by beginning with only one conclusion.
Ok. What part of cognitive psychological studies is being missed here? It has nothing to do with the crediblity or lack there of the people on the scene and neither does it have anything to do with who supressed what. It's simply how the mind works, end of story. And no matter how many dodges are attempted it won't change that fact. Which is largely why I find mainstream "truther" movement HIGHLY suspect as any contrary bit of information gets marginalized by any means necessary even such silly ones as you two are attempting without even reading the material presented.
And no matter how many dodges are attempted it won't change that fact.
Watcher-In-The-Shadows what do you have to say about SPreaston statement of the 503 eywittness that went on record and ALL saw explosions and all heard explosion and saw FLASHES going around the WTC’s. The FBI hid these statements from public view until the New York Times sued the NYC government to release this information to the public, and guess what the New York Times WON their law suit under the F.O.I.A
Here read them for yourself and deny your ignorance.
Originally posted by impressme
I will make the question very simple do you believe all the 503 eyewitness are lairs YES or NO.
Just select yes or no, nothing else, it’s just that simple.
Originally posted by OmegaPoint
Explosive Testimony: Revelations about the Twin Towers in the 9/11 Oral Histories
by David Ray Griffin
9/11 Revisted - were explosives used
Google Video Link
Videos of destruction
It's all so obvious, it really makes you wonder where some people are coming from..?
Patriotism? Incredulity because of the magnitude of the "Big Lie"..? Maybe even yes, the occasional "Cointelpro" who's JOB it is to spin everything towards the OS..? It's hard to say.
Other than initiating the fires in wtc7, the damage from the debris from wtc1 had little effect on initiating the collapse of wtc7.
NSTAR 1A, pxxxiii