Anyone can be bitten or stung by an insect, and bites and stings are very common. Youâre at greater risk if you spend a lot of time outdoors, especially in rural or wooded locations. Children and older adults may have more severe reactions to bites and stings.
60 feet divided by this number should be the arrow's speed in feet per second. Double the distance from the masking tape to the center of the 40 yard grouping, and divide by 32 feet per second per second.20 feet divided by this number is the arrow's speed in feet per second, and should be the approximately same as the result in step 6, allowing for errors in measurement.
For example, a 70 lb. bow may lose one foot per second for every additional three grains of arrow weight for arrows near 350 grains, but for arrows near 450 grains it may take 4 grains of arrow weight to reduce the speed one foot per second.nter total arrow weight (grains). Enter additional weight on the string (grains). Estimated FPS =. Note: This calculator makes the assumption that increasing or decreasing arrow weight by 3 grains will change the speed by one foot per second.