Difference between revisions of "Small Inline Reaction Wheel"

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m (Usage: Hyperlinked COM to "Center of mass" page)
(Usage: Quote-ify C7's explanation of distance from COM.)
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== Usage ==
 
== Usage ==
The placement does matter for [[reaction wheel]]s. Generally speaking they can cause some problems if placed far from the [[Center of mass|COM]]. Imagine you are grabbing that point and rotating it. That is what the reaction wheels will try to do. You'll get offcenter rotation anywhere other then near the COM.<ref>[http://forum.kerbalspaceprogram.com/entry.php/740#comment4254 Answer from C7] in his blog entry “[http://forum.kerbalspaceprogram.com/entry.php/740 Updated Information on SAS in 0.21.1]”</ref> They appear to function on a stability:mass ratio, and the effect can be enhanced by adding additional Inline Reaction Wheels. Often a single Inline Reaction Wheel isn't enough.  
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{{quote|The placement does matter for [[reaction wheel]]s. Generally speaking they can cause some problems if placed far from the [[Center of mass|COM]]. Imagine you are grabbing that point and rotating it. That is what the reaction wheels will try to do. You'll get offcenter rotation anywhere other then near the COM.|[http://forum.kerbalspaceprogram.com/entries/740-Updated-Information-on-SAS-in-0-21-1#comment_4254 C7], in his blog entry “[http://forum.kerbalspaceprogram.com/entries/740-Updated-Information-on-SAS-in-0-21-1 Updated Information on SAS in 0.21.1]”}} They appear to function on a stability:mass ratio, and the effect can be enhanced by adding additional Inline Reaction Wheels. Often a single Inline Reaction Wheel isn't enough.  
  
Each Inline Reaction Wheel adds 0.5 to the mass of your ship; if you require a lot of Inline Reaction Wheels to get a large ship off the ground, consider dropping them with your earlier stages when you no longer need them.
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Each Inline Reaction Wheel adds 0.3 tons to the mass of your ship; if you require a lot of Inline Reaction Wheels to get a large ship off the ground, consider dropping them with your earlier stages when you no longer need them.
  
Although its internal part name is ''sasModule'' it does not provide [[SAS]], but may be used by it.
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Although its internal part name is ''sasModule'', it does not provide [[SAS]], though SAS can use reaction wheels.
  
 
== Changes ==
 
== Changes ==

Revision as of 22:06, 8 January 2014

Small Inline Reaction Wheel
Part image
Stability Augmentation System by
Found lying by the side of the road

Radial size Tiny
Cost (total) 600.00 Funds
Mass (total) 0.05 t
Drag 0.2
Max. Temp. 2000 K
Volume  ?
Impact Tolerance 9 m/s
Research Tech tree advanced flight control.png Flight Control
Unlock cost 3 200 Funds
Since version 0.7.3
Part configuration inlineReactionWheel.cfg
Pitch torque 5.0 kN·m
Yaw torque 5.0 kN·m
Roll torque 5.0 kN·m
Electricity required for torque
0.050
s·kN·m
SAS level × None

The Inline Reaction Wheel (previously named S.A.S Module) is a toggleable module that provides torque. It is one of the parts featured in the demo version of the game.

Description

The wheel adds assistive torque to a spacecraft, at the cost of electric charge

Unknown

Usage

The placement does matter for reaction wheels. Generally speaking they can cause some problems if placed far from the COM. Imagine you are grabbing that point and rotating it. That is what the reaction wheels will try to do. You'll get offcenter rotation anywhere other then near the COM.

C7, in his blog entry “Updated Information on SAS in 0.21.1

They appear to function on a stability:mass ratio, and the effect can be enhanced by adding additional Inline Reaction Wheels. Often a single Inline Reaction Wheel isn't enough.

Each Inline Reaction Wheel adds 0.3 tons to the mass of your ship; if you require a lot of Inline Reaction Wheels to get a large ship off the ground, consider dropping them with your earlier stages when you no longer need them.

Although its internal part name is sasModule, it does not provide SAS, though SAS can use reaction wheels.

Changes

0.21.1
  • Increased torque (3 → 20)
  • Mass decreased from 0.5 to 0.3
0.21
  • Renamed from “S.A.S Module” into “Inline Reaction Wheel”
  • Mass increased from 0.07 to 0.5
  • Costs electric charge
0.18
  • Retextured
  • (Undocumented) Mass reduced from 0.8 to 0.07, cost reduced from 2300 to 600
  • (Undocumented) Torque increased from 10 to 20, Ki/Kp/Kd changed from 1.0 / 3.0 / 5.0 to 0.0 / 5.0 / 3.5
0.11.0
  • (undocumented) SAS now use angular momentum instead of angular velocity - takes into account inertia momentum of the ship [1]
0.9
  • (undocumented) Tweaked Kd, Ki and Kp parameters
0.8.5
  • Exposed Kd, Ki and Kp parameters for tuning the SAS module
0.8
  • SAS toggle with 'T' key
0.7.3
  • Initial Release

Notes