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I want to draw the propeller, which is mixing the water in the pool.In attached file you can see my drawing. How can I develop this drawing?

\documentclass[tikz,border=5]{standalone}
\begin{document}
\begin{tikzpicture}
\draw[line width = 10pt] (-0.75,0.5) -- (-0.75,-2.75) --
    (3.0, -2.75) -- (3.0,0.5);
\draw[join=round, line width = 5pt, color = gray!25] (-0.75,0.42) --
    (-0.75,-2.75) -- (3.0, -2.75) -- (3.0,0.42);
\draw[join=round, line width = 10pt] (-1.5,-2.75) -- (-0.85,-2.75) ;
\draw[join=round, line width = 5pt, color = gray!25] (-1.5,-2.75) -- (-0.7,-2.75) ;
\draw[join=round, line width = 10pt] (3.10,-2.75) -- (3.75,-2.75) ;
\draw[join=round, line width = 5pt, color = gray!25] (3.00,-2.75) -- (3.75,-2.75) ;
\fill[gray!40!white] (-0.57,-2.57) rectangle (2.83,0.0);
\draw[rounded corners=2pt,fill=black, ultra thick] (0.8,-0.5) -- (2,-0.4) -- (2,-0.6) -- cycle;
\draw[rounded corners=2pt,fill=black, ultra thick] (1.2,-0.5) -- (0,-0.4) -- (0,-0.6) -- cycle;
\draw[join = round, ultra thick] (1,-0.50) -- (1,2.5);
\draw[-latex,thin](-1.5,-1.50)node[above,scale=1.0]{\scriptsize{$25^{\circ}C$}} to[out=-80,in=150] (-1.5,-2.70);
\draw[-latex,thin](2.0,1.0)node[above,scale=1.0]{\scriptsize{$90^{\circ}C$}} to[out=-80,in=100] (2.0,0.00);
\draw[-stealth,thin](0.75,1.25) to[out=-80,in=-120] (1.25,1.25);
\end{tikzpicture}   
\end{document}
Svend Tveskæg
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ihsan
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    Some people take exception to questions of the form "Please draw this for me". You will get more help if you post some code showing what you have tried and give a minimal working example. –  Mar 21 '16 at 12:13
  • what does a propeller look like? – percusse Mar 21 '16 at 12:28
  • @percusse https://www.google.fr/search?client=ubuntu&channel=fs&q=propeller&ie=utf-8&oe=utf-8&gfe_rd=cr&ei=z-nvVuPKDrTF8AfIgIaoBw – flav Mar 21 '16 at 12:32
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    @flav then OP will come and say oh is it possible to draw it from the side view? and then endless fun... ;) – percusse Mar 21 '16 at 12:33
  • @percusse What is OP ? – flav Mar 21 '16 at 12:35
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    @flav Original Poster – percusse Mar 21 '16 at 12:36
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    Related: Wind power and tikz force – Torbjørn T. Mar 21 '16 at 12:44
  • Related: Draw an aircraft with Tikz – Werner Mar 21 '16 at 15:25
  • Using 'controls' will help you. From what I have in store : % agitation \begin{scope}[ultra thick, black] \draw (30,85) -- (30,35); \draw[fill=black] (30,35) .. controls (32,36) and (34,37) .. (35,35) .. controls (34,33) and (32,34) .. (30,35); \draw[fill=black] (30,35) .. controls (28,36) and (26,37) .. (25,35) .. controls (26,33) and (28,34) .. (30,35); \end{scope} – DRi Mar 22 '16 at 12:12
  • I think that the OP gave some code and that he only wants a better shape for the drawing of the propeller part. I drew this kind of scheme before as a chemist (or chemical engineer). If the question is reopen I could get the opportunity to share some simple code with him – DRi Mar 22 '16 at 12:21
  • @DRi Probably those comments might have been responding to the original question which didn't include the code? In any case, it is now reopened, so you could now post your answer. – cfr Mar 22 '16 at 12:41
  • @cfr Thank you for reopening the question and giving me the opportunity to provide an answer. – DRi Mar 22 '16 at 13:18
  • @DRi I had nothing to do with reopening it ;). – cfr Mar 22 '16 at 14:06

1 Answers1

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Using 'controls' and replacing only the two lines (instead of '\draw[rounded corners=2pt,fill=black, ultra thick]...') related to the propeller drawing :

\draw[fill=black] (1,-0.5) .. controls (1.4,-0.4) and (1.8,-0.3) .. (2,-0.5) .. controls (1.8,-0.7) and (1.4,-0.6) .. (1,-0.5);
\draw[fill=black] (1,-0.5) .. controls (1.4,-0.4) and (1.8,-0.3) .. (2,-0.5) .. controls (1.8,-0.7) and (1.4,-0.6) .. (1,-0.5);

will give you a nicer shape ! By the way, propeller is probably not the word you want to use, may I suggest stirring blades or stirring impeller instead.

DRi
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