How do you calculate momentum of an arrow?
You can find an arrow momentum calculator online, but it’s very easy to do yourself (see the arrow momentum formula below).
- Momentum (arrow) = mass of arrow (grains) x arrow speed (fps) / 225,400.
- As an example:
- 400 grain arrow x 300 fps bow / 225,400 = 0.53 pound seconds (momentum)
How do you calculate kinetic energy of an arrow?
The measurable “power” of your bow – it’s total kinetic energy output – ultimately depends upon just two variables: the mass of the arrow and the speed of the arrow. Kinetic energy of an arrow can be found by using the formula KE=(mv²)/450,240 where m = mass of the arrow in grains and v = velocity of the arrow in fps.
What is a good momentum for an arrow?
This is 41 times the KE, but only 4.3 times the momentum of a 350-grain arrow at 300 fps (70 ft-lbs / 0.469 slugs)….FINDING THE BEST KILLER ARROW FOR YOUR BOW.
| MOMENTUM | KINETIC ENERGY | SIZE |
|---|---|---|
| 0.163-0.210 slug fps | 15-25 ft-lbs | Small Game |
| 0.207-0.305 slug fps | 25-41 ft-lbs | Medium Game |
How do you calculate arrow speed?
To calculate arrow speed, measure the distance in inches between the two groups of arrows you shot from 20 and 40 yards. Granted, this is not as accurate as a chronograph, but it’ll give you an idea. Once you have this figure, you can calculate the kinetic energy produced by your bow.
How do you find Ke?
In classical mechanics, kinetic energy (KE) is equal to half of an object’s mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.
What is a good arrow speed for deer hunting?
Even with today’s small profile, fixed-blade heads, most experts recommend a maximum arrow speed of 260-270 fps.
What is the minimum arrow speed for deer hunting?
The unofficial rule regarding minimum KE to push an arrow through a deer is about 40 foot-pounds. Lower-poundage bows are slower than higher-poundage models. So, let’s say the bow is pushing a 350-grain arrow at 265 feet per second. That setup is delivering roughly 54 foot-pounds of KE and .
How fast does a 50lb bow shoot?
Seasoned archers have purported that a bow looses 15 to 20 fps for every ten pounds of draw weight deducted from the benchmark 70. So, if you bought the version of your bow that has a 50-pound draw weight, you could be shooting at 40 fps less than the 70-pound version.
How do you calculate arrow weight?
Front of Center
- Divide the arrow’s length (distance from the bottom of the nock groove to the shaft’s end) by 2.
- Find the balance point.
- Subtract the center of the arrow measurement (calculated in Step 1) from the balance point (calculated in Step 2).
- Multiply Step 3’s answer by 100.
How do you find momentum?
The Momentum Calculator uses the formula p=mv, or momentum (p) is equal to mass (m) times velocity (v).
How do you calculate the speed of an arrow?
To calculate arrow speed, measure the distance in inches between the two groups of arrows you shot from 20 and 40 yards. Granted, this is not as accurate as a chronograph, but it’ll give you an idea. Once you have this figure, you can calculate the kinetic energy produced by your bow.
Kinetic energy is simply the energy of an object expended due to its speed and mass. You can calculate kinetic energy in an arrow by taking the weight in grains, multiplying it by the speed in feet per second squared and then dividing by the constant 450800.
How do you calculate the weight of an arrow?
The draw weight for an arrow with a certain deflection is calculated by dividing the ATA test distance (26 inches) with the measured deflection. If a shaft deflects at 0.900 inches, the corresponding draw weight is 26/0.900 = 29 pounds, for a 26-inch long arrow.
How much kinetic energy for bowhunting?
Depending on the bow you use and the arrows you use, your kinetic energy could range from 30 foot pounds at 30 yards to almost 125 foot pounds at 30 yards. These numbers are dependent on the FPS of the crossbow.