Aerodynamic heating: Difference between revisions

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==Drag in flight==
==Aerodynamic Heating==
There are 4 forces acting on an aerospace vehicle in flight.  
Friction causes heat.<br>
#[[Thrust]]
[[Drag]] causes friction<br>
#Drag
At very high altitudes and very high speeds the individual molecules in the [[Atmosphere]] need to be pushed out of the way of an object [[Reentry|reentering]].<br>
#[[Lift]]
Since each molecule has [[kg|Mass]]. The molecules resist moving. This friction causes heating.
#[[Kg|Mass]]
[[image:4forces.jpg]]
 
 
*An aircraft will accelerate as long as the [[Thrust]] is greater then the drag.
*The aircraft stay the same [[IAS|indicated air speed]] when [[Thrust]] and drag are equal.
*The aircraft will slow down when drag is greater then [[Thrust]].  
 
===Drag as action==
The act of moving an object over or through another is called dragging.
Dragging two objects over or through each other causes friction were the 2 meet.
<br>At very high speeds this may lead to[[Aerodynamic_heating| Aerodynamic heating]].
 
Examples:
<br> I am dragging the bag on the ground.
<br>The anchor is dragging in the water.

Revision as of 22:23, 28 August 2007

Aerodynamic Heating

Friction causes heat.
Drag causes friction
At very high altitudes and very high speeds the individual molecules in the Atmosphere need to be pushed out of the way of an object reentering.
Since each molecule has Mass. The molecules resist moving. This friction causes heating.

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