This wiki is currently experiencing migration problems. This is known and will be fixed at some point.

Registered users can edit this wiki.

Control surface

From Kerbal Space Program Wiki
Jump to: navigation, search
Error creating thumbnail: Unable to save thumbnail to destination
adjusting the reaction to the different axes

A control surface is an aerodynamic part that provides reactive force when in motion relative to the surrounding atmosphere. Control surfaces provide greater control and stability to rockets and aircraft, though they are of no use outside of an atmosphere.

Each of the control surfaces has tweakables to enable or disable each control axis. Disabling undesired axes can prevent the craft from over-reacting to control inputs. These can be done in the SPH or VAB, and even after launch.

To provide a good level of control in a given axis, they should be placed far away from the center of mass in the appropriate direction:

  • Pitch (elevators): lifts and lowers the nose of the craft around the pitch axis, running from left to right through the center of mass. Typically placed on the horizontal tail fins.
  • Yaw (rudders): turns the craft left and right around the yaw axis, running up and down through the center of mass. Typically placed on the vertical tail fin(s).
  • Roll (ailerons): rolls the craft around the longitudinal axis, running from nose to tail through the center of mass. Typically placed at the end of the wings.

The Active/Inactive label by the axis indicates whether the control surface responds to input in the given axis.

Control surfaces can be deployed. This represents extending flaps, which increases lift and drag, thus reducing stall speed. This is useful for reducing speed and altitude while maintaining a level attitude for a landing approach. It may be a good idea to start with flaps deployed and bind toggling them to the "gears" action group.

(As the KSP aerodynamic model is not very realistic now (0.25[outdated]), the crafts can be controlled quite "well" without adjusting too)

Table of Control Surfaces

Image Part Cost
(Fund)
Mass
(t)
Max. Temp.
(K)
Tolerance
(m/s)
Lift Deflection Range
(°)
Surface
Area
Av-r8 winglet.png
AV-R8 Winglet 640 0.1 2 000 12 0.5 15 0.95
Standard canard.png
Standard Canard 720 0.1 2 000 12 0.5 20 0.95
Advanced canard.png
Advanced Canard 800 0.08 2 000 12 0.4 20 0.95
Delta-deluxe winglet.png
Delta-Deluxe Winglet 600 0.08 2 000 12 0.65 15 0.2
Image needed.svg
Tail Fin 600 0.125 2 000 12 0.61 25 1.0
Image needed.svg
FAT-455 Aeroplane Tail Fin 1 000 0.08 1 200 15 2.69 15 0.2
Image needed.svg
Big-S Spaceplane Tail Fin 2 500 0.45 2 000 15 3.49 25 0.29
Elevon 1.png Elevon 1 400 0.05 2 000 15 0.25 20 0.95
Elevon 2.png Elevon 2 550 0.06 2 000 15 0.30 20 0.95
Elevon 3.png Elevon 3 650 0.08 2 000 15 0.42 20 0.95
Elevon 4.png Elevon 4 400 0.04 2 000 15 0.18 20 0.95
Elevon 5.png Elevon 5 800 0.08 2 000 15 0.4 20 0.95
Image needed.svg
Big-S Elevon 1 950 0.15 2 000 15 0.77 25 1.0
Image needed.svg
Big-S Elevon 2 1 300 0.23 2 000 15 1.16 25 1.0
Image needed.svg
FAT-445 Aeroplane Control Surface 800 0.17 1 200 15 0.86 15 1.0
Image needed.svg
A.I.R.B.R.A.K.E.S[Note 1] 500 0.05 2 000 8 0.38 70 1.0
  1. A.I.R.B.R.A.K.E.S are classified as an "Aero Surface" in the part configuration files and in-game.