diff --git a/contents/tech-intro.tex b/contents/tech-intro.tex
new file mode 100644
index 0000000000000000000000000000000000000000..e15b563f83341585f05ac928482cab611954aa15
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+++ b/contents/tech-intro.tex
@@ -0,0 +1,26 @@
+% -----------------------------------------------------------------------------
+% Introduction of the technical documentation
+%
+% Author: Thomas Lambert <t.lambert@uliege.be>
+% ULiege - Aeroelasticity and Experimental Aerodynamics
+% https://gitlab.uliege.be/thlamb/Rotare-doc
+%
+% License: CC-BY-SA-4.0
+% This work is licensed under a Creative Commons Attribution-ShareAlike 4.0
+% International License (https://creativecommons.org/licenses/by-sa/4.0/)
+% ------------------------------------------------------------------------------
+
+\chapter*{Introduction}
+\label{chap:tech:intro}
+
+This second part of \rotare's documentation concerns the technical aspect of
+the code and its implementation. The goal is not to give a full lecture on the
+Blade Element Momentum Theory, but rather to write out the main equations and
+detail the way they are implemented and solved within \rotare.
+
+The first chapter details the architecture of the code itself, which can be
+useful if the developers that want to extend the possibilities offered by the
+software.
+The following ones are more directed to users that want an in-depth knowledge of
+the equations and solving process employed by the program. Finally, some basic
+validation cases are provided against well-known literature examples.
diff --git a/rotare-doc.tex b/rotare-doc.tex
index fa2ec5040531e561c48416cec8b58aecec056ef4..a802b20904c926dfcdba08d4111f7353f1922392 100644
--- a/rotare-doc.tex
+++ b/rotare-doc.tex
@@ -25,7 +25,7 @@ titlepage=on,           % own page for each title page
 captions=tableabove,    % display table captions above the float env
 chapterprefix=false,    % do not display a prefix for chapters
 appendixprefix=false,   % do not display a prefix for appendix chapter
-draft,            % toggle if draft version
+%draft,            % toggle if draft version
 ]{scrreprt}%
 
 
@@ -85,7 +85,7 @@ draft,            % toggle if draft version
 
 \part{Technical documentation}
 \label{part:tech}
-\input{contents/definitions}
+\input{contents/tech-intro}
 %\input{contents/tech-architecture}
 \input{contents/tech-solvers}
 \input{contents/tech-extensions}