Difference between revisions of "Template:VT"
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(*mass, radius, pressure and scale height from subtemplates to parameters; *rewritten documentation according to the newest findings on the atmosphere article;) |
(+allow numbered parameters;) |
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| Line 1: | Line 1: | ||
<includeonly>{{#expr: <!-- | <includeonly>{{#expr: <!-- | ||
--> ( <!-- | --> ( <!-- | ||
| − | --> 2 * {{G}} * {{BodyData|{{{planet}}}|mass}} <!-- | + | --> 2 * {{G}} * {{BodyData|{{{planet|{{{1}}}}}}|mass}} <!-- |
--> / ( <!-- | --> / ( <!-- | ||
| − | --> ({{{alt}}} + {{BodyData|{{{planet}}}|radius}} <!-- | + | --> ({{{alt|{{{2}}}}}} + {{BodyData|{{{planet|{{{1}}}}}}|radius}} <!-- |
--> )^2 * <!-- | --> )^2 * <!-- | ||
| − | --> ( {{BodyData|{{{planet}}}|pressure}} * e^(-{{{alt}}}/{{BodyData|{{{planet}}}|scale height}}) <!-- | + | --> ( {{BodyData|{{{planet|{{{1}}}}}}|pressure}} * e^(-{{{alt|{{{2}}}}}}/{{BodyData|{{{planet|{{{1}}}}}}|scale height}}) <!-- |
--> ) * (1.2230948554874 * 0.008) * 0.2 * 1 <!-- | --> ) * (1.2230948554874 * 0.008) * 0.2 * 1 <!-- | ||
--> ) <!-- | --> ) <!-- | ||
| Line 17: | Line 17: | ||
This template calculates terminal velocity of an object given the planet and the altitude from the planet's surface. It uses {{Tl|BodyData}} with the properties <tt>mass</tt>, <tt>radius</tt>, <tt>pressure</tt> and <tt>scale height</tt>. | This template calculates terminal velocity of an object given the planet and the altitude from the planet's surface. It uses {{Tl|BodyData}} with the properties <tt>mass</tt>, <tt>radius</tt>, <tt>pressure</tt> and <tt>scale height</tt>. | ||
| + | |||
| + | {{Parameter Table|name=both|parameters= | ||
| + | {{Parameter Row|1|name2=planet|The celestial body}} | ||
| + | {{Parameter Row|2|name2=alt|The altitude at which the terminal velocity should be calculated.}} | ||
| + | }} | ||
: <math>v_T = \sqrt{\frac{250 \frac{\text{kg}}{\text{m}^2} \cdot GM}{(a+r)^2 \cdot \rho \cdot d}}</math> | : <math>v_T = \sqrt{\frac{250 \frac{\text{kg}}{\text{m}^2} \cdot GM}{(a+r)^2 \cdot \rho \cdot d}}</math> | ||
Revision as of 11:48, 15 September 2013
| Usage | Produces |
|---|---|
{{VT | planet = Kerbin | alt = 0}} |
100.1288989294 |
This template calculates terminal velocity of an object given the planet and the altitude from the planet's surface. It uses {{BodyData}} with the properties mass, radius, pressure and scale height.
(M is the mass of the body, r is the body's radius, p0 is pressure at 0 m altitude (“sea level”), a is the altitude above sea level and H is the scale height)
The formula assumes that the coefficient of drag (d) is 0.2 and is used from the atmosphere article.
