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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 16: POWER SCREWS"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 16.1: PS1.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 16-1\n",
+"clc;\n",
+"clear;\n",
+"d=30;\n",
+"W=20*10^3;\n",
+"r1=8;\n",
+"r2=16;\n",
+"p=6;\n",
+"u1=0.2;\n",
+"u2=0.15;\n",
+"dm=d-(p/2);\n",
+"alpha=atan(p/(%pi*dm));\n",
+"phi=atan(u1);\n",
+"rm=(r1+r2)/2;\n",
+"Ttr=W*((dm*tan(alpha+phi)/2)+(u2*rm));\n",
+"Ttr=Ttr*10^-3;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('Ttr is %0.3f Nm     ',Ttr);\n",
+"  \n",
+"  //The answer to Ttr is slightly different than in the book due to rounding-off of values."
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 16.2: PS2.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 16-2\n",
+"clc;\n",
+"clear;\n",
+"d=50;\n",
+"W=20*10^3;\n",
+"r1=10;\n",
+"r2=30;\n",
+"p=7;\n",
+"u1=0.12/cosd(15);\n",
+"u2=0.15;\n",
+"dm=d-(p/2);\n",
+"alpha=atan(3*p/(%pi*dm));\n",
+"phi=atan(u1);\n",
+"rm=(r1+r2)/2;\n",
+"Tr=W*((dm*tan(alpha+phi)/2)+(u2*rm));\n",
+"Tr=Tr*10^-3;\n",
+"Te=W*((dm*tan(phi-alpha)/2)+(u2*rm));\n",
+"Te=Te*10^-3;\n",
+"n=dm/2*tan(alpha)/(dm*tan(alpha+phi)/2+(u2*rm));\n",
+"L=0.30;\n",
+"Ph=Tr/L;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('Tr is %0.2f Nm     ',Tr);\n",
+"  printf('\n Te is %0.3f Nm     ',Te);\n",
+"  printf('\n n is %0.4f      ',n);\n",
+"  printf('\n Ph is %0.2f N     ',Ph);\n",
+"  \n",
+"  //The answers to Tr, Te and Ph is slightly different than in the book due to rounding-off of values.\n",
+"\n",
+""
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 16.3: PS3.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 16-3\n",
+"clc;\n",
+"clear;\n",
+"d=30;\n",
+"W=5*10^3;\n",
+"p=5;\n",
+"rm=45/2;\n",
+"u1=0.15/cosd(14.5);\n",
+"u2=0.15;\n",
+"dm=d-(p/2);\n",
+"alpha=atan(p/(%pi*dm));\n",
+"phi=atan(u1);\n",
+"Tr1=W*((dm*tan(alpha+phi)/2)+(u2*rm));\n",
+"Tr1=Tr1*10^-3;\n",
+"n1=dm/2*tan(alpha)/(dm*tan(alpha+phi)/2+(u2*rm));\n",
+"T1=W*((dm*tan(phi-alpha)/2)+(u2*rm));\n",
+"T1=T1*10^-3;\n",
+"n2=dm/2*tan(alpha)/(dm*tan(phi-alpha)/2+(u2*rm));\n",
+"u2=0.02;\n",
+"Tr2=W*((dm*tan(alpha+phi)/2)+(u2*rm));\n",
+"Tr2=Tr2*10^-3;\n",
+"n3=dm/2*tan(alpha)/(dm*tan(alpha+phi)/2+(u2*rm));\n",
+"Te=W*((dm*tan(phi-alpha)/2)+(u2*rm));\n",
+"Te=Te*10^-3;\n",
+"n4=dm/2*tan(alpha)/(dm*tan(phi-alpha)/2+(u2*rm));\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('Tr1 is %0.3f Nm     ',Tr1);\n",
+"  printf('\n n1 is %0.4f      ',n1);\n",
+"  printf('\n T1 is %0.3f Nm     ',T1);\n",
+"  printf('\n n2 is %0.4f      ',n2);\n",
+"  printf('\n Tr2 is %0.3f Nm     ',Tr2);\n",
+"  printf('\n n3 is %0.4f      ',n3);\n",
+"  printf('\n Te is %0.3f Nm     ',Te);\n",
+"  printf('\n n4 is %0.4f      ',n4);\n",
+"  \n",
+"  //The answer to T1 is misprinted in the book."
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 16.4: PS4.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 16-4\n",
+"clc;\n",
+"clear;\n",
+"d=28;\n",
+"P=300;\n",
+"L=180;\n",
+"p=8;\n",
+"r1=16;\n",
+"r2=46;\n",
+"rm=(r1+r2)/2;\n",
+"u1=0.12;\n",
+"u2=0.15;\n",
+"dm=d-(p/2);\n",
+"alpha=atan(p/(%pi*dm));\n",
+"phi=atan(u1);\n",
+"T=P*L;\n",
+"F=T/((dm*tan(alpha+phi)/2)+(u2*rm));\n",
+"F=F*10^-3;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('F is %0.3f kN     ',F);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 16.5: PS5.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 16-5\n",
+"clc;\n",
+"clear;\n",
+"d=25;\n",
+"p=8;\n",
+"F=392.4;\n",
+"L=250;\n",
+"l=p*2;\n",
+"u=0.14;\n",
+"dm=d-(p/2);\n",
+"alpha=atan(l/(%pi*dm));\n",
+"phi=atan(u);\n",
+"T=dm*tan(alpha+phi)/2;\n",
+"M=F*L;\n",
+"P=M/T*10^-3;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('P is %0.1f kN     ',P);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 16.6: PS6.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 16-6\n",
+"clc;\n",
+"clear;\n",
+"d=52;\n",
+"W=2.2*10^3;\n",
+"p=8;\n",
+"r1=15;\n",
+"r2=30;\n",
+"rm=(r1+r2)/2;\n",
+"u1=0.15/cosd(14.5);\n",
+"dm=d-(p/2);\n",
+"alpha=atan(p/(%pi*dm));\n",
+"phi=atan(u1);\n",
+"Ts=W*dm*tan(alpha+phi)/2;\n",
+"u2=0.12;\n",
+"Tc=u2*W*rm;\n",
+"T=10^-3*(Ts+Tc);\n",
+"N=40;\n",
+"w=2*%pi*N/60;\n",
+"P=T*w*10^-3;\n",
+"To=W*dm/2*tan(alpha);\n",
+"n=To/(T*10^3);\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('P is %0.2f KW     ',P);\n",
+"  printf('\n n is %0.4f      ',n);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 16.7: PS7.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 16-7\n",
+"clc;\n",
+"clear;\n",
+"alpha=atan(2*0.2/(%pi*0.9));\n",
+"u1=0.15;\n",
+"phi=atan(u1);\n",
+"P=200;\n",
+"L=250;\n",
+"Tt=P*L;\n",
+"W=10*10^3;\n",
+"u2=0.15;\n",
+"x=Tt/W;\n",
+"d=x/0.1716;\n",
+"d=30;\n",
+"p=6;\n",
+"dr=0.8*d;\n",
+"d=24;\n",
+"p=5;\n",
+"dr=d-p;\n",
+"dm=d-(p/2);\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('d is %0.0f mm     ',d);\n",
+"  printf('\n p is %0.0f mm     ',p);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 16.8: PS8.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 16-8\n",
+"clc;\n",
+"clear;\n",
+"FOS=3;\n",
+"sigut=380;\n",
+"Ta=0.577*sigut/FOS;\n",
+"d=25;\n",
+"Tus=460;\n",
+"Ps=%pi*d*Tus;\n",
+"siga=127;\n",
+"dr=sqrt(Ps*4/(%pi*siga));\n",
+"d=30;\n",
+"p=6;\n",
+"dr=d-p;\n",
+"dm=d-(p/2);\n",
+"u1=0.15;\n",
+"alpha=atan(p*2/(%pi*dm));\n",
+"phi=atan(u1);\n",
+"T=Ps*dm*tan(alpha+phi)/2;\n",
+"T1=16*T/(%pi*dr^3);\n",
+"sigc=4*Ps/(%pi*dr^2);\n",
+"sigmax=sigc/2+sqrt((sigc/2^2)+(T1^2));\n",
+"Tmax=sqrt((sigc/2^2)+(T1^2));\n",
+"n=tan(alpha)/tan(alpha+phi);\n",
+"Uo=Ps/2;\n",
+"Ui=Uo/n;\n",
+"wav=%pi/2;\n",
+"wmax=2*wav;\n",
+"I=Ui*2/wmax^2;\n",
+"k=0.4;\n",
+"Ir=0.9*I*10^-3;\n",
+"m=Ir/k^2;\n",
+"R=0.4;\n",
+"rho=7200;\n",
+"a=sqrt(m/(2*%pi*R*rho));\n",
+"T=T*10^-3;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('T is %0.3f Nm     ',T);\n",
+"  printf('\n n is %0.4f      ',n);\n",
+"  printf('\n a is %0.5f mm      ',a);\n",
+"  \n",
+"  //The difference in the answers of T is due to rounding-off of values.\n",
+"\n",
+""
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}