Difference between revisions of "Common Ammo"
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| − | + | == Description of the table columns: == | |
| + | |||
| + | ; Ammo : The type of ammo. For ammo that is cut by the barrel, such as spuds, this gives a typical length of the ammo. The length of the ammo and the barrel diameter determine the actual size of the ammo. For spuds, there is more than one way to [[potato#Selection, cutting and use|cut]] the shell. | ||
| + | ; Mass : The mass of the ammo in ounces (oz.) and grams. | ||
| + | ; Diameter : The diameter of the ammo in inches (") and centimeters (cm). For ammo that is cut by the barrel, such as spuds, this is the barrel diameter. For ammo that is not cut, such as golf balls, this is the ammo's normal diameter. | ||
| + | ; Cd : Coeficient of drag. The Cd of a particular ammo is usually dependent on the velocity of the ammo and whether or not it is spinning or tumbling. | ||
| + | ; Terminal Velocity : The maximum velocity the ammo will reach when dropped, in air, form a great height. | ||
| + | ; Barrel : Suggestions as suitable barrels for the particular ammo. Primarily for ammo that has a defined size, such as a tennis ball. | ||
| + | ; Other Info : Various other bits of information concerning the ammo. | ||
{| border="1" cellpadding="5" cellspacing="0" align="left" style="text-align:center" | {| border="1" cellpadding="5" cellspacing="0" align="left" style="text-align:center" | ||
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!colspan="7" align="left" | '''Vegies''' | !colspan="7" align="left" | '''Vegies''' | ||
|- | |- | ||
| − | | [[Spud]], 2"L || 2.54 oz., 72g || 1.59", 4.04cm || - || - || 1.5" SCH 40 || | + | | [[Spud]], 2"L || 2.54 oz., 72g || 1.59", 4.04cm || - || - || 1.5" SCH 40 ||align=left| |
* density ~1.1g/cm<sup>3</sup> | * density ~1.1g/cm<sup>3</sup> | ||
|- | |- | ||
| Line 19: | Line 27: | ||
!colspan="7" align="left" | '''Balls''' | !colspan="7" align="left" | '''Balls''' | ||
|- | |- | ||
| − | | Ping-Pong Ball || 0.095 oz., 2.7g || 0.95", cm || 0.460 || 9m/s, 30fps || - || - | + | | Ping-Pong Ball || 0.095 oz., 2.7g || 0.95", cm || 0.460 <br\> (note 1) || 9m/s, 30fps || - || - |
|- | |- | ||
| − | | [[Golf ball]] || 1.59 oz., 45g || 1.68", 4.27cm || 0.299 || 40m/s, 132fps || - || - | + | | [[Golf ball]] || 1.59 oz., 45g || 1.68", 4.27cm || 0.299 <br\> (note 1) || 40m/s, 132fps || - || - |
|- | |- | ||
| − | | [[Tennis_ball|Tennis Ball]] || 2.08 59g || 2.56", 6.5cm || 0.283 || 31m/s, 102fps || | + | | [[Tennis_ball|Tennis Ball]] || 2.08 59g || 2.56", 6.5cm || 0.283 <br\> (note 1) || 31m/s, 102fps ||align=left| |
* 2.5" SCH 40 | * 2.5" SCH 40 | ||
* 2.5" SDR 21 | * 2.5" SDR 21 | ||
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|| - | || - | ||
|- | |- | ||
| − | | Baseball || 5.1 oz., 145g || 2.9", 7.4cm || 0.290 || 42m/s, 138fps || - || - | + | | Baseball || 5.1 oz., 145g || 2.9", 7.4cm || 0.290 <br \> (note 1) || 42m/s, 138fps || - || - |
|- | |- | ||
| − | | Basketball || 21.2 oz., 600g || 9.5", 24.1cm || 0.500 || 20m/s, 66fps || - || - | + | | Basketball || 21.2 oz., 600g || 9.5", 24.1cm || 0.500 <br \> (note 1) || 20m/s, 66fps || - || - |
|- | |- | ||
!colspan="7" align="left" | '''Ball Bearings (BBs, Airsoft, Paintballs...)''' | !colspan="7" align="left" | '''Ball Bearings (BBs, Airsoft, Paintballs...)''' | ||
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| AAA || ? oz., ?g || ?", ?cm || - || - || - || - | | AAA || ? oz., ?g || ?", ?cm || - || - || - || - | ||
|- | |- | ||
| − | | [[C_Cell|C]] || 2.4-2.6 oz., 68-74g || 0.996", 2.53cm || - || - || - || | + | | [[C_Cell|C]] || 2.4-2.6 oz., 68-74g || 0.996", 2.53cm || - || - || - ||align=left| |
* 2" (5.1cm) long | * 2" (5.1cm) long | ||
* mass varies by brand | * mass varies by brand | ||
| Line 61: | Line 69: | ||
| [[Pycrete]] || ?? oz., ??g || ?", ?cm || - || - || - || - | | [[Pycrete]] || ?? oz., ??g || ?", ?cm || - || - || - || - | ||
|- | |- | ||
| − | | [[Beverage_can|Soda Can]] || 13.0 oz., 369g<br>(water filled) || 2.6", 6.6cm || - || - || | + | | [[Beverage_can|Soda Can]] || 13.0 oz., 369g<br>(water filled) || 2.6", 6.6cm || - || - ||align=left| |
* 2.5" SDR 26 | * 2.5" SDR 26 | ||
* [[Sleeved]] 3" SCH 40 | * [[Sleeved]] 3" SCH 40 | ||
|| - | || - | ||
|} | |} | ||
| − | . | + | '''Table Notes''' |
| + | # The Cd values for the various sport balls (tennis ball, golfball ...) were calculated based on their terminal velocities using the equation <span style="font-style: italic;">C<sub>d</sub></span>=2<span | ||
| + | style="font-style: italic;">mg</span>/(<span | ||
| + | style="font-style: italic;">Aρ</span><span style="font-style: italic;">v</span><sub>terminal</sub><sup>2</sup>) with g=9.8m/s and <span style="font-style: italic;">ρ</span>=1290g/m<sup>3</sup><span style="font-style: italic;"></span>. The terminal velocities were from [http://www.cord.org/uploadedfiles/CTNJune2002.pdf Terminal Velocity Teachers Notes] and [http://www.gantless.com/paper.html A Penny in Free Fall]. | ||
| + | |||
[[Category:Projectiles]] | [[Category:Projectiles]] | ||
Revision as of 17:33, 26 March 2008
Description of the table columns:
- Ammo
- The type of ammo. For ammo that is cut by the barrel, such as spuds, this gives a typical length of the ammo. The length of the ammo and the barrel diameter determine the actual size of the ammo. For spuds, there is more than one way to cut the shell.
- Mass
- The mass of the ammo in ounces (oz.) and grams.
- Diameter
- The diameter of the ammo in inches (") and centimeters (cm). For ammo that is cut by the barrel, such as spuds, this is the barrel diameter. For ammo that is not cut, such as golf balls, this is the ammo's normal diameter.
- Cd
- Coeficient of drag. The Cd of a particular ammo is usually dependent on the velocity of the ammo and whether or not it is spinning or tumbling.
- Terminal Velocity
- The maximum velocity the ammo will reach when dropped, in air, form a great height.
- Barrel
- Suggestions as suitable barrels for the particular ammo. Primarily for ammo that has a defined size, such as a tennis ball.
- Other Info
- Various other bits of information concerning the ammo.
| Ammo | Mass | Diameter | Cd | Terminal Velocity |
Barrel | Other Info |
| Vegies | ||||||
|---|---|---|---|---|---|---|
| Spud, 2"L | 2.54 oz., 72g | 1.59", 4.04cm | - | - | 1.5" SCH 40 |
|
| Spud, 4"L | 5.04 oz., 143g | 1.59", 4.04cm | - | - | 1.5" SCH 40 | - |
| Spud, 2"L | 4.20 oz., 119g | 2.05", 5.21cm | - | - | 2" SCH 40 | - |
| Spud, 4"L | 8.40 oz., 238g | 2.05", 5.21cm | - | - | 2" SCH 40 | - |
| Balls | ||||||
| Ping-Pong Ball | 0.095 oz., 2.7g | 0.95", cm | 0.460 <br\> (note 1) | 9m/s, 30fps | - | - |
| Golf ball | 1.59 oz., 45g | 1.68", 4.27cm | 0.299 <br\> (note 1) | 40m/s, 132fps | - | - |
| Tennis Ball | 2.08 59g | 2.56", 6.5cm | 0.283 <br\> (note 1) | 31m/s, 102fps |
|
- |
| Baseball | 5.1 oz., 145g | 2.9", 7.4cm | 0.290 (note 1) |
42m/s, 138fps | - | - |
| Basketball | 21.2 oz., 600g | 9.5", 24.1cm | 0.500 (note 1) |
20m/s, 66fps | - | - |
| Ball Bearings (BBs, Airsoft, Paintballs...) | ||||||
| 0.177" Copper/Steel BB | 0.0116 oz, 0.33g | 0.177", 0.45cm | - | - | - | - |
| 6mm Airsoft | 0.0071 oz., 0.20g | 0.23", 0.6cm | - | - | - | - |
| ??" Paintball | ? oz., ?g | ?", ?cm | - | - | - | - |
| ??" glass marble | ? oz., ?g | ?", ?cm | - | - | - | - |
| Batteries | ||||||
| AA | ? oz., ?g | ?", ?cm | - | - | - | - |
| AAA | ? oz., ?g | ?", ?cm | - | - | - | - |
| C | 2.4-2.6 oz., 68-74g | 0.996", 2.53cm | - | - | - |
|
| D | ?? oz., ??g | ?", ?cm | - | - | - | - |
| Other Things | ||||||
| Ice | ?? oz., ??g | ?", ?cm | - | - | - | - |
| Pycrete | ?? oz., ??g | ?", ?cm | - | - | - | - |
| Soda Can | 13.0 oz., 369g (water filled) |
2.6", 6.6cm | - | - |
|
- |
Table Notes
- The Cd values for the various sport balls (tennis ball, golfball ...) were calculated based on their terminal velocities using the equation Cd=2mg/(Aρvterminal2) with g=9.8m/s and ρ=1290g/m3. The terminal velocities were from Terminal Velocity Teachers Notes and A Penny in Free Fall.
