Difference between revisions of "Physicsless part"

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= Massless Parts =
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[[File:RV-105 RCS Thruster Block Delta V test.png|thumb|Delta-V comparison of three [[RV-105 RCS Thruster Block]] as massless and normal parts]]
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'''Physicsless parts''' are parts where the physics don't work in the usual way. The mass of the part and the drag experienced by it are added to the parent's part. The part itself has no mass but it still contributes to the vehicle's mass. Before [[1.0.1]] the mass and the drag weren't added to the parent but just ignored. It is influenced by the <code>PhysicsSignificance</code> flag in the part configuration which must be set to 1 to make it physicsless.
  
Some parts within the game are listed as having a small mass, but in the config file a flag is set "PhysicsSignificance = 1". This has the effect that in flight physics calculations such as mass and drag are not calculated for that part.
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When constructing a craft, the [[root part]] can't be such a part.
  
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== Behaviour ==
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A craft with only physicsless parts starts to oscillate after a short time and then starts to destroy itself. But this is usually not possible because the root part is always not a physicsless part. The game can change the property on the fly, so that when a new root part after decoupling would be physicsless the game removes that special status.
  
== List of massless parts ==
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== List of physicsless parts ==
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Physicsless parts as of 1.4.5:
  
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{{:Physicsless part/List}}
  
''Correct as of 0.23.5''
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Note that several parts, such as the [[LT-2 Landing Strut]], have <code>PhysicsSignificance = 0</code> in its part.cfg. This does nothing, and the part behaves as normal.
  
* [[Cubic_Octagonal_Strut]]
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== See also ==
* [[Octagonal_Strut]]
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* [https://www.youtube.com/watch?v=tNMnDrLCW60 Kerbal Space Program - Your Physics Have No Power Over Me!]” by Scott Manley
*  [[Small_Gear_Bay]]
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* All Ladders
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{{Parts}}
* [[Z-100_Rechargeable_Battery_Pack]]
 
* Strut Connectors
 

Revision as of 20:39, 17 June 2019

Delta-V comparison of three RV-105 RCS Thruster Block as massless and normal parts

Physicsless parts are parts where the physics don't work in the usual way. The mass of the part and the drag experienced by it are added to the parent's part. The part itself has no mass but it still contributes to the vehicle's mass. Before 1.0.1 the mass and the drag weren't added to the parent but just ignored. It is influenced by the PhysicsSignificance flag in the part configuration which must be set to 1 to make it physicsless.

When constructing a craft, the root part can't be such a part.

Behaviour

A craft with only physicsless parts starts to oscillate after a short time and then starts to destroy itself. But this is usually not possible because the root part is always not a physicsless part. The game can change the property on the fly, so that when a new root part after decoupling would be physicsless the game removes that special status.

List of physicsless parts

Physicsless parts as of 1.4.5:

Note that several parts, such as the LT-2 Landing Strut, have PhysicsSignificance = 0 in its part.cfg. This does nothing, and the part behaves as normal.

See also