Recent content by Laserslug

LaserMan in Suffield, Connecticut

Energy efficiency estimate Energy efficiency estimate of 26% is calculated next... The gunpowder burns in oxygen to make gasses, but it leaves some dirty stuff in the barrel. So if .5 grams of gunpowder burns, oxygen adds weight, but residue is lost in the barrel. I guess that the expelled...

The conservation of energy includes kinetic energy plus work plus heat. That makes the calculation too difficult for tonight because of the energy lost heating up the barrel and the flames blowing out into the air. Momentum is easier to calculate. The conservation of momentum says the mv of the...

I apologize. I will never discuss the power of a bullet again on THR.

I checked some references and my statemnt is correct that momentum has units of pound second in the Imperial system and newton second in metric newton second is metric momentum , pound second is imperial impulse adds to momentum http://www.unc.edu/~rowlett/units/dictN.html pound mass is...

The bullet has .07 horsepower. One horsepower is 550 foot pounds per second. If the rifle is pointed straight up, muzzle velocity is 2200 fps and the bullet is 1/55 pounds (127 grain bullet) and the bullet rises 55 feet in 1/40 second then power is 55 feet x 1/55 pounds / (1/40 ) sec = 40...

You are correct that a pound is a force, not a mass. That is why in the Original Post I showed the metric numbers at the end : notes on metric units to double check : b = mv = 9g x 775 m/s in metric = 7kg m/s = 48 lb sec ~= 50 lb sec sanity checked I will research the rigorous conversion of...

Pounds x Seconds is Momentum Yes, you are all right. The numbers are for a simplified model of the bullet 1 foot from the muzzle for a wadcutter made of tungsten hitting a diamond as large as a boar. But still, the units of momentum are pound seconds. 50 pound seconds of momentum for a .308...

Momentum, force, and pressure of a .308 bullet, 146 grain momentum has units of pound seconds ( b = mv ) in English 1/3 oz x 2400 ft/s = 1/48 lb x 2400 ft/s = 2400/48 = 50 lb sec time for bullet to smash = 1 foot/12 inch x 1/2 inch / (2400 ft/s) = .5/(12 x 2400) = 17...

Energy is measured in foot pounds. Momentum is measured in pound seconds. If you need details of how mass times velocity gives pound seconds, just ask.

Pressure The acceleration of the bullet in the barrel is from Newton's second law. f=ma so acceleration is force divided by mass. The force is due to the pressure of expanding gases. The pressure is force per square inch , (force per area). A bigger bullet has more square inches, so the...

The inventions which are included in sophisticated guns are sometimes described in great detail at this website: http://www.freepatentsonline.com/ Spending an hour searching patents that are assigned to certain companies would help you to become educated beyond my level of expertise in guns...

The conservation of momentum and the conservation of energy both are true. momentum = mv energy = 1/2 m (v squared) + heat + work for momentum: mass of bullet * velocity of bullet = mass of gun * velocity of gun 10g * 2000 feet per sec = 1000g * 20 feet per second So if the gun is made twice as...

In the John Wayne movie "Big Jake" in 1910 there is a pistol with an arm brace featured. Rent the DVD to see the arm brace on an old auto loader. It is what you proposed.

Here in Hawaii, the .357 is the minimum handgun caliber allowed for hunting game mammals, according to regulations. The minimum long gun needs 1100 foot pounds of muzzle energy. All .357 magnums have less than 600 foot pounds of muzzle energy in this chart...