% 
\documentclass[a4paper]{article}
\usepackage[OT1]{fontenc}
\usepackage{Sweave}
%\VignetteIndexEntry{HelicopterInstructions}

\begin{document}

\title{Design of the Paper Helicopter}
\author{Emilio Lopez}

\maketitle


\section{Obtaining the Helicopter}
The paper helicopter is a widely used example for training in Quality 
Methodologies. It was first mentioned in \cite{gbox1991}. 

A pdf document with a template of the paper helicopter design 
(see Fig. \ref{fig:template})
is located in the 
folder \texttt{doc} of the \texttt{SixSigma} package. 
It can be also obtained with the command \texttt{vignette("HelicopterInstructions")}.

Print it in A4 paper 
without adjusting to the paper size to get the correct dimensions.

You can also generate a copy of the pdf document in your working directory
with the function \texttt{ss.heli()}:

<<results=hide, eval=FALSE>>=
	library(SixSigma)
	ss.heli()
@

\begin{figure}
\begin{center}
	\includegraphics[width=0.6\textwidth]{helicopterDesign}
\caption{Paper Helicopter template.}
\label{fig:template}
\end{center}
\end{figure}


\section{Assembling the Helicopter}

Follow the instructions in the template (Fig. \ref{fig:diag}): fold by 
the continuous lines and
cut the discontinuous lines, depending on the prototype you want to build.

The yellow strips are for tape, the green strip is for paper clip. These 
materials are optional.

\begin{figure}
\begin{center}
	\includegraphics[width=0.6\textwidth]{helides}
\caption{Paper Helicopter Diagram.}
\label{fig:diag}
\end{center}
\end{figure}

\begin{thebibliography}{1}
\bibitem[Box(1992)]{gbox1991}
George Box.
\newblock Teaching engineers experimental design with a paper helicopter.
\newblock \emph{Quality Engineering}, 4\penalty0 (3):\penalty0 453--459, 1992.

\end{thebibliography}

\end{document}
