Calculating Free Recoil
There are several different ways to calculate free recoil. However, the two most common are the momentum short and long forms.
Both forms will yield the same value. The short form uses one equation as where the long form requires two equations. With the long form you will first find for the fire arm velocity. With the velocity known for the small arm, the free recoil of the small arm can be calculated using the translational kinetic energy equation.
- Momentum short form:
- Momentum long form: →
Where as:
Etgu is the translational kinetic energy of the small arm as expressed by the joule (J).
mgu is the weight of the small arm expressed in kilograms (kg).
mp is the weight of the projectile expressed in grams (g).
mc is the weight of the powder charge expressed in grams (g).
vgu is the velocity of the small arm expressed in meters per second (m/s).
vp is the velocity of the projectile expressed in meters per second (m/s).
vc is the velocity of the powder charge expressed in meters per second (m/s).
1000 is the conversion factor to set the equation equal to kilograms.
Read more about this topic: Free Recoil
Famous quotes containing the words calculating, free and/or recoil:
“Because relationships are a primary source of self-esteem for girls and women, daughters need to know they will not lose our love if they speak up for what they want to tell us how they feel about things. . . . Teaching girls to make specific requests, rather than being indirect and agreeable, will help them avoid the pitfalls of having to be manipulative and calculating to get what they want.”
—Jeanne Elium (20th century)
“The improved American highway system ... isolated the American-in-transit. On his speedway ... he had no contact with the towns which he by-passed. If he stopped for food or gas, he was served no local fare or local fuel, but had one of Howard Johnson’s nationally branded ice cream flavors, and so many gallons of Exxon. This vast ocean of superhighways was nearly as free of culture as the sea traversed by the Mayflower Pilgrims.”
—Daniel J. Boorstin (b. 1914)
“A man with your experience in affairs must have seen cause to appreciate the futility of opposition to the moral sentiment. However feeble the sufferer and however great the oppressor, it is in the nature of things that the blow should recoil upon the aggressor. For God is in the sentiment, and it cannot be withstood.”
—Ralph Waldo Emerson (1803–1882)