Introduction and such Our Procedure and such Graphs and such
Introduction
Our bb gun is powered by air and the pressure inside is what launches the bb out of the barrel. To add pressure inside the gun a pumping action is required. We are using a 760 pumpmaster bb gun. It is a pump action gun that holds eighteen 4.5 mm bbs in its magazine and 200 bbs in its reservoir. It can shoot the bb up to 190.5 meters per second (625 feet per second).
To determine the effect each pump has in the velocity of the bb we will see how far the bb falls over a predetermined distance of seventy-five feet. Obviously, even an object moving at high speeds should adhere to the laws of gravity and accelerate 9.8 meters per second downward. Therefore, the slower the bb travels, the more it should drop.
“At a distance of 75 feet, an acceptable group could be covered by a quarter.”
www.crossman.com/site/listing/1073
|
Power
Source: |
pump |
|
Caliber: |
.177
(4.5 mm) |
|
Max
Velocity: |
BB:
up to 625 fps (190.5 m/s) Pellet: up to 600 fps (182.8 m/s) |
|
Capacity: |
Reservoir:
200 BBs, Magazine: 18 BBs |
|
Length: |
33.5"
(85.09 cm) |
|
Weight: |
2
lbs. 12 oz. (1.25 kg.) |
|
Material: |
Barrel:
Smooth bore steel, Stock and Forearm: Synthetic |