Added(A)/Deleted(D) following books

 A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/Chapter3_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/Chapter4_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/Chapter5_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/Chapter6_1.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/Chapter7_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/Chapter9_1.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter10_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter12_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter13_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter14_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter15_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter16_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter17_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter19_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter20_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter21_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter22_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter23_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter24_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter25_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter26_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter27_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter28_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter29_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter30_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter31_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter32_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter33_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter34_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter35_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/chapter36_2.ipynb
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/screenshots/Clipper_waveform_1.png
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/screenshots/Gate_to_Source_Voltage_vs_Drain_Current_1.png
A  A_Textbook_of_Applied_Electronics_by_R_S_Sedha/screenshots/transconductance_curve_1.png
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter11_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter13_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter14_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter15_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter16_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter17_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter21_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter22_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter23_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter26_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter2_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter4_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter5_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/Chapter9_2.ipynb
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/screenshots/21AOQCurve_2.png
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/screenshots/21X&RChart_2.png
A  A_Textbook_of_Production_Engineering_by_P._C._Sharma/screenshots/22CuttingVvsCutterDia_2.png
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER01_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER02_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER03_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER04_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER07_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER09_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER11_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER15_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER16_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER18_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER19_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER20_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER23_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/CHAPTER24_1.ipynb
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/screenshots/Capture02_1.png
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/screenshots/Capture04_1.png
A  Electrical_Engineering_Fundamentals_by__Del_Toro_Vincent_/screenshots/Capture20_1.png
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter2_2.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter3_2.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter4_2.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter6_2.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter7_2.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter8_2.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/Chapter9_2.ipynb
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/screenshots/chapter2_2.png
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/screenshots/chapter3_2.png
A  High_Voltage_Engineering_by_V_Kamaraju_,_M_S_Naidu/screenshots/chapter4_2.png
A  Machine_Design_by_U.C._Jindal/Ch10_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch11_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch12_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch13_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch14_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch15_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch16_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch17_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch18_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch19_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch20_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch21_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch22_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch23_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch24_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch25_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch26_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch27_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch28_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch29_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch30_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch31_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch3_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch4_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch5_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch6_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch7_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch8_1.ipynb
A  Machine_Design_by_U.C._Jindal/Ch9_1.ipynb
A  Machine_Design_by_U.C._Jindal/screenshots/Chapter-3stressgraph_1.png
A  Machine_Design_by_U.C._Jindal/screenshots/Chapter-_8AdditionalLoad_1.png
A  Machine_Design_by_U.C._Jindal/screenshots/Chapter11_-_strengthofrevet_1.png
A  Power_System_Operation_and_Control_by_B._R._Gupta/Chapter1_1.ipynb
A  Power_System_Operation_and_Control_by_B._R._Gupta/Chapter2_1.ipynb
A  Power_System_Operation_and_Control_by_B._R._Gupta/Chapter3_1.ipynb
A  Power_System_Operation_and_Control_by_B._R._Gupta/Chapter4_1.ipynb
A  Power_System_Operation_and_Control_by_B._R._Gupta/Chapter5_1.ipynb
A  Power_System_Operation_and_Control_by_B._R._Gupta/Chapter6_1.ipynb
A  Power_System_Operation_and_Control_by_B._R._Gupta/screenshots/Ch1-EnergyLadCurveAndMassCurve_1.png
A  Power_System_Operation_and_Control_by_B._R._Gupta/screenshots/Ch2-LoadGeneration_1.png
A  Power_System_Operation_and_Control_by_B._R._Gupta/screenshots/Ch2-ReceivedPower_1.png

1 files changed, 468 insertions, 0 deletions

diff --git a/Machine_Design_by_U.C._Jindal/Ch27_1.ipynb b/Machine_Design_by_U.C._Jindal/Ch27_1.ipynb
new file mode 100644
index 00000000..adcb8623
--- /dev/null
+++ b/Machine_Design_by_U.C._Jindal/Ch27_1.ipynb
@@ -0,0 +1,468 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Ch:27 Straight bevel gears"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 27-1 - Page 712"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Pt is 1061 N  \n",
+      "\n",
+      "Ps is 386.18 N  \n",
+      "\n",
+      "Pr is 345.41 N  \n",
+      "\n",
+      "Pa  is 172.71 N  \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, atan, sin, tan, cos\n",
+    "from __future__ import division\n",
+    "P=8000#\n",
+    "N1=400#\n",
+    "N2=200#\n",
+    "i=N1/N2# #i=Zg/Zp=dg/dp\n",
+    "gamma1=atan(1/i)#\n",
+    "gamma2=90-gamma1#\n",
+    "rp=200#\n",
+    "R=rp/sin(gamma1)#\n",
+    "b=0.2*R#\n",
+    "rm1=rp-(b*sin(gamma1)/2)#\n",
+    "Pt=P*1000*60/(2*pi*N1*rm1)#\n",
+    "alpha=20*pi/180#\n",
+    "Ps=Pt*tan(alpha)#\n",
+    "Pr=Ps*cos(gamma1)#\n",
+    "Pa=Ps*sin(gamma1)#\n",
+    "print \"Pt is %0.0f N  \"%(Pt)#\n",
+    "print \"\\nPs is %0.2f N  \"%(Ps)#\n",
+    "print \"\\nPr is %0.2f N  \"%(Pr)#\n",
+    "print \"\\nPa  is %0.2f N  \"%(Pa)#\n",
+    "\n",
+    "#The difference in the values is due to rounding-off of the values."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 27-2 - Page 712"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Zpv is 22.88   \n",
+      "\n",
+      "Sb is 6653 N  \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, atan, sin, tan, cos\n",
+    "alpha=20*pi/180#\n",
+    "Zp=20#\n",
+    "Zg=36#\n",
+    "m=4#\n",
+    "sigut=600#\n",
+    "b=25#\n",
+    "dp=m*Zp#\n",
+    "rp=dp/2#\n",
+    "dg=m*Zg#\n",
+    "rg=dg/2#\n",
+    "gamma1=atan(rp/rg)#\n",
+    "Zpv=Zp/cos(gamma1)#\n",
+    "Y=0.33+0.003*0.88#\n",
+    "sigb=sigut/3#\n",
+    "Sb=m*b*sigb*Y#\n",
+    "print \"Zpv is %0.2f   \"%(Zpv)#\n",
+    "print \"\\nSb is %0.0f N  \"%(Sb)#"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 27-3 - Page 712"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "gamma1 is 33.7 deg  \n",
+      "\n",
+      "gamma2 is 56.3 deg  \n",
+      "\n",
+      "R  is 162.25 mm  \n",
+      "\n",
+      "FCA  is 35.808 deg  \n",
+      "\n",
+      "RCA  is 31.04 deg  \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, atan, sin, tan, cos,asin\n",
+    "m=6#\n",
+    "Zp=30#\n",
+    "Zg=45#\n",
+    "dp=m*Zp#\n",
+    "rp=dp/2#\n",
+    "dg=m*Zg#\n",
+    "rg=dg/2#\n",
+    "R=sqrt(rg**2+rp**2)#\n",
+    "gamma1=180/pi*asin(rp/R)#\n",
+    "gamma2=(90-gamma1)#\n",
+    "ha=6#\n",
+    "hf=1.25*ha#\n",
+    "phi=180/pi*atan(ha/R)#\n",
+    "beta=180/pi*atan(hf/R)#\n",
+    "#let Face Cone Angle be FCA\n",
+    "FCA=(gamma1+phi)#\n",
+    "#Let Root cone angle be RCA\n",
+    "RCA=(gamma1-beta)#\n",
+    "print \"gamma1 is %0.1f deg  \"%(gamma1)#\n",
+    "print \"\\ngamma2 is %0.1f deg  \"%(gamma2)#\n",
+    "print \"\\nR  is %0.2f mm  \"%(R)#\n",
+    "print \"\\nFCA  is %0.3f deg  \"%(FCA)#\n",
+    "print \"\\nRCA  is %0.2f deg  \"%(RCA)#"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 27-4 - Page 713"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Sw is 12142.4 N  \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, atan, sin, tan, cos\n",
+    "alpha=20*pi/180#\n",
+    "Zp=25#\n",
+    "Zg=40#\n",
+    "m=5#\n",
+    "b=30#\n",
+    "BHN=400#\n",
+    "dp=m*Zp#\n",
+    "rp=dp/2#\n",
+    "dg=m*Zg#\n",
+    "rg=dg/2#\n",
+    "gamma1=atan(rp/rg)#\n",
+    "gamma1=180/pi*gamma1#\n",
+    "gamma2=(90-gamma1)#\n",
+    "a=cos(pi/180*gamma2)#\n",
+    "Zp1=Zp/cos(gamma1)#\n",
+    "Zg1=Zg/a#\n",
+    "Q=(2*Zg1)/(Zp1+Zg1)#\n",
+    "K=0.16*(BHN/100)**2#\n",
+    "Sw=0.75*b*dp*Q*K/cos(pi/180*gamma1)#\n",
+    "print \"Sw is %0.1f N  \"%(Sw)#\n",
+    "  \n",
+    "  #The difference in the value of Sw is due to rounding-off of the value of Q."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 27-5 - Page 713"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Sb is 4633 N   \n",
+      "\n",
+      "Sw is 5438.0 N  \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, atan, sin, tan, cos\n",
+    "Zp=20#\n",
+    "Zg=36#\n",
+    "m=4#\n",
+    "b=25#\n",
+    "BHN=360#\n",
+    "Np=750#\n",
+    "FOS=1.75#\n",
+    "dp=m*Zp#\n",
+    "rp=dp/2#\n",
+    "dg=m*Zg#\n",
+    "rg=dg/2#\n",
+    "gamma1=atan(dp/dg)#\n",
+    "gamma1=180/pi*gamma1#\n",
+    "gamma2=(90-gamma1)#\n",
+    "a=cos(pi/180*gamma2)#\n",
+    "Zp1=Zp/cos(pi/180*gamma1)#\n",
+    "Zg1=Zg/a#\n",
+    "Q=(2*Zg1)/(Zp1+Zg1)#\n",
+    "K=0.16*(BHN/100)**2#\n",
+    "R=sqrt(rp**2+rg**2)#\n",
+    "Y=0.33+0.003*0.86#\n",
+    "sigut=600#\n",
+    "sigb=sigut/3#\n",
+    "Sb=m*b*Y*sigb*(1-(b/R))#\n",
+    "Sw=0.75*b*dp*Q*K/cos(pi/180*gamma1)#\n",
+    "print \"Sb is %0.0f N   \"%(Sb)#\n",
+    "print \"\\nSw is %0.1f N  \"%(Sw)#\n",
+    "\n",
+    "#The answwer to Sb is calculated incorrectly in the book."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 27-6 - Page 713"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "m*Y is 2.613 mm**2  \n",
+      "\n",
+      "m is 6 mm  \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, atan, sin, tan, cos\n",
+    "Dp=300#\n",
+    "rp=150#\n",
+    "#Let the angular velocity ratio be i\n",
+    "i=2/3#\n",
+    "rg=rp/i#\n",
+    "Dg=2*rg#\n",
+    "R=sqrt(rp**2+rg**2)#\n",
+    "P=15000#\n",
+    "N=300#\n",
+    "Cs=1.5#\n",
+    "FOS=2#\n",
+    "sigb=100#\n",
+    "gamma1=atan(Dp/Dg)#\n",
+    "gamma1=180/pi*gamma1#\n",
+    "gamma2=(90-gamma1)#\n",
+    "v=2*pi*N*rp/(60*1000)#\n",
+    "Cv=5.6/(5.6+sqrt(v))#\n",
+    "Pt=P/v#\n",
+    "Peff=Pt*Cs/Cv#\n",
+    "Sb=Peff*FOS#\n",
+    "b=R/4#\n",
+    "#let x=m*Y\n",
+    "x=Sb/(b*sigb*(1-(b/R)))#\n",
+    "m=6#\n",
+    "print \"m*Y is %0.3f mm**2  \"%(x)#\n",
+    "print \"\\nm is %0.0f mm  \"%(m)#"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 27-7 - Page 714"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "m is 4 mm  \n",
+      "\n",
+      "BHN is 189   \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, atan, sin, tan, cos\n",
+    "Zp=24#\n",
+    "Zg=36#\n",
+    "N=1400#\n",
+    "P=11600#\n",
+    "Cs=1.4#\n",
+    "FOS=2#\n",
+    "sigut=600#\n",
+    "sigb=sigut/3#\n",
+    "gamma1=atan(Zp/Zg)#\n",
+    "gamma1=180/pi*gamma1#\n",
+    "gamma2=(90-gamma1)#\n",
+    "a=cos(pi/180*gamma2)#\n",
+    "Zp1=Zp/cos(pi/180*gamma1)#\n",
+    "Zg1=Zg/a#\n",
+    "Q=(2*Zg1)/(Zp1+Zg1)#\n",
+    "v=1.76#\n",
+    "Pt=P/v#\n",
+    "Cv=5.6/(5.6+sqrt(v))#\n",
+    "Peff=Pt*Cs/Cv#\n",
+    "x=Peff*FOS#\n",
+    "Y=0.352+(0.003*0.85)#\n",
+    "y=2*sigb*Y*(1-(6/21.63))#\n",
+    "m=sqrt(x/y)#\n",
+    "# Design is safe for m=4\n",
+    "m=4#\n",
+    "b=6*m#\n",
+    "dp=24*m#\n",
+    "rp=48#\n",
+    "dp=dp/cos(pi/180*gamma1)#\n",
+    "v=2*pi*N*rp/(60*1000)#\n",
+    "Cv=5.6/(5.6+sqrt(v))#\n",
+    "Sb=y*m**2#\n",
+    "#Sw=Sb#\n",
+    "K=Sb/(0.75*b*dp*Q)#\n",
+    "BHN=sqrt(K/0.16)*100#\n",
+    "print \"m is %0.0f mm  \"%(m)#\n",
+    "print \"\\nBHN is %0.0f   \"%(BHN)#\n",
+    "  \n",
+    "#The answwer to BHN is calculated incorrectly in the book."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 27-8 - Page 714"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "m is 6 mm  \n",
+      "\n",
+      "b is 36 mm  \n",
+      "\n",
+      "R is 216 mm  \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, atan, sin, tan, cos\n",
+    "Zp=40#\n",
+    "Zg=60#\n",
+    "P=3500#\n",
+    "N=600#\n",
+    "Cs=1.5#\n",
+    "sigb=55#\n",
+    "gamma1=atan(Zp/Zg)#\n",
+    "gamma1=180/pi*gamma1#\n",
+    "gamma2=(90-gamma1)#\n",
+    "a=cos(pi/180*gamma2)#\n",
+    "Zp1=Zp/cos(pi/180*gamma1)#\n",
+    "Zg1=Zg/a#\n",
+    "Q=(2*Zg1)/(Zp1+Zg1)#\n",
+    "# Design is safe for m=6\n",
+    "m=6#\n",
+    "b=6*m#\n",
+    "dp=Zp*m#\n",
+    "rp=dp/2#\n",
+    "dg=Zg*m#\n",
+    "rg=dg/2#\n",
+    "R=sqrt(rp**2+rg**2)#\n",
+    "print \"m is %0.0f mm  \"%(m)#\n",
+    "print \"\\nb is %0.0f mm  \"%(b)#\n",
+    "print \"\\nR is %0.0f mm  \"%(R)#"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.9"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}