How much momentum does a deer need?
How much momentum does a deer need?
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.
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 fast does a 40 lb bow shoot?
The nock attaches to the string and when you release the string, those 40 lbs are set free. The string launches the arrow forward and transfers the energy from the string to the arrow, which is now travelling at around 240+ fps.
How do you calculate kinetic energy in archery?
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 arrow momentum?
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 heavy should my arrow be for whitetail deer?
Ed Ashby recommends a much heavier setup for maximum performance, starting at 650 grains for deer-sized animals. For my personal setup, I found myself somewhere in the middle of those two trains of thought. I shoot 570 grain arrows from my 65-lb Mathews VXR with a 30-inch draw length.
What is good momentum for a hunting 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 |
|---|---|---|
| 0.207-0.305 slug fps | 25-41 ft-lbs | Medium Game |
| 0.349-0.433 slug fps | 42-65 ft-lbs | Large Game |
Is 250 fps good for a bow?
Anything in the 250-300fps range is perfect. I believe, for most archers) if you are faster than 300fps you could trade some speed for a heavier(more efficient and forgiving) arrow. Slower than 250fps go to lighter arrow for a better trajectory. on a deer you would miss the target at 250, while you are a low 8 at 300.
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. Beyond that, broadhead planing becomes problematic for all but the very best archers. Today’s fastest bows are awesome in their ability to deliver speed.
What is kinetic energy and momentum in an arrow?
When it comes to your bowhunting setup, knowing the “Kinetic Energy” of your arrow allows you to know how much energy that arrow possesses due to motion, from being shot by your bow. The “Momentum” tells you how much force it will take to stop your arrow when it reaches its intended target. Arrow weight Value must be between 250 and 1000 grains.
How do you calculate the aiming distance of an arrow?
A properly balanced arrow measurements of 7 to 10%. Use the straight-line distance to the target. This is the distance needed for the calculation. In this example, a guesstimated angle of 45 degrees and a 28 yard straight line distance will require an aiming distance of 19.8 yards.
What information do I need to use the arrow weight calculator?
You will need to provide total arrow weight and initial speed for the calculation to be effective, as well as some other optional info (see below). The calculator assumes average air density and air viscosity.
What is the weight and speed of my Arrow?
Arrow weight Value must be between 250 and 1000 grains. Arrow speed Value must be between 100 and 500 Feet Per Second. If you know your arrow’s weight (in grains) and your arrow’s speed (Feet Per Second), then you can use our Kinetic Energy and Momentum calculator above to find out each! Simply move the sliders or enter the values in the blanks.
