This is something I made for placing RCS thrusters in the right positions in the first try without having to go back and forth between the VAB and the hacked gravity launchpad.
- Display thrust and torque forces caused by RCS or engines.
- Delta V readout for RCS.
- Dry center of mass marker.
- "Average" center of mass marker.
- The CoM marker represents better the situation in flight.
- Ability to resize editor's overlay markers.
- Display total mass of resources.
RCSBuildAid supports blizzy78's toolbar, if you have it installed, enable RSCBuildAid from there. If you don't have the toolbar installed then you enable RCSBuildAid by enabling the center of mass marker. Once you enable the plugin you should see RCSBuildAid's window show up. Press the RCS button or any of the translation flight control keys, the "hnijkl" keys, and then you should see something like this:
Cyan arrows represents thruster forces, the green arrow represents the translation motion (or thrust). The red arrow represents the torque force in your vessel, if you have a red arrow then your ship will rotate when trying to translate in docking mode. So all you have to do is place your RCS thrusters in a way that eliminates this force. The red circular arrow is an indication of how fast the vessel will rotate. The red CoM marker is the dry center of mass (DCoM) which represents the center of mass of your vessel when it doesn't have any fuel (in the picture, without liquid fuel, oxidizer or mono-propellant, but is configurable).
Check the imgur album for some examples
This plugin only works with parts using stock modules such as ModuleRCS and ModuleEngines, mods that use custom modules will not be detected.
* delta v readout will only show for monopropellant RCS, doesn't work for the new Vernor RCS.
Sources are in the zip file and in github.
Licensed under LGPLv3.
Code:This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.