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, 273 insertions, 0 deletions

diff --git a/Machine_Design_by_U.C._Jindal/Ch26_1.ipynb b/Machine_Design_by_U.C._Jindal/Ch26_1.ipynb
new file mode 100644
index 00000000..c9bde487
--- /dev/null
+++ b/Machine_Design_by_U.C._Jindal/Ch26_1.ipynb
@@ -0,0 +1,273 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Ch:26 Helical gears"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 26-1 - Page 698"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "m is 4.14 mm  \n",
+      "\n",
+      "alpha is 20.647 deg  \n",
+      "\n",
+      "Pa is 90.8 mm   \n",
+      "\n",
+      "Pd is 72.8 mm   \n",
+      "\n",
+      "Ga is 215 mm   \n",
+      "\n",
+      "Gd is 197 mm   \n",
+      "\n",
+      "b is 48.55 mm   \n"
+     ]
+    }
+   ],
+   "source": [
+    "from __future__ import division\n",
+    "from math import sqrt, pi, sin, cos, tan, atan\n",
+    "Zp=20#\n",
+    "Zg=50#\n",
+    "alphan=20*pi/180#\n",
+    "phi=15*pi/180#\n",
+    "mn=4#\n",
+    "m=mn/cos(phi)#\n",
+    "alpha=180/pi*atan(tan(alphan)/(cos(phi)))#\n",
+    "dp=Zp*m#\n",
+    "dg=Zg*m#\n",
+    "ha=4#\n",
+    "hd=1.25*mn#\n",
+    "#Let addendum circle dia of pinion be Pa\n",
+    "Pa=dp+(2*mn)#\n",
+    "#Let dedendum circle dia of pinion be Pd\n",
+    "Pd=dp-(2.5*mn)#\n",
+    "#Let addendum circle dia of gear be Ga\n",
+    "Ga=dg+(2*mn)#\n",
+    "#Let dedendum circle dia of gear be Gd\n",
+    "Gd=dg-(2.5*mn)#\n",
+    "b=pi*mn/sin(phi)#\n",
+    "print \"m is %0.2f mm  \"%(m)#\n",
+    "print \"\\nalpha is %0.3f deg  \"%(alpha)#\n",
+    "print \"\\nPa is %0.1f mm   \"%(Pa)#\n",
+    "print \"\\nPd is %0.1f mm   \"%(Pd)#\n",
+    "print \"\\nGa is %0.0f mm   \"%(Ga)#\n",
+    "print \"\\nGd is %0.0f mm   \"%(Gd)#\n",
+    "print \"\\nb is %0.2f mm   \"%(b)#"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 26-2 - Page 698"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Pt is 747.78 N   \n",
+      "\n",
+      "Pa is 272.2 N  \n",
+      "\n",
+      "Pr is 289.64 N  \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import pi, sin, cos, tan\n",
+    "P=5000#\n",
+    "Zp=25#\n",
+    "Zg=50#\n",
+    "mn=4#\n",
+    "alphan=20*pi/180#\n",
+    "phi=20*pi/180#\n",
+    "N=1200#\n",
+    "m=mn/cos(phi)#\n",
+    "dp=Zp*m#\n",
+    "dg=Zg*m#\n",
+    "v=2*pi*N*dp/(60*2*1000)#\n",
+    "Pt=P/v#\n",
+    "Pa=Pt*tan(phi)#\n",
+    "Pr=Pt*tan(alphan)/cos(phi)#\n",
+    "print \"Pt is %0.2f N   \"%(Pt)#\n",
+    "print \"\\nPa is %0.1f N  \"%(Pa)#\n",
+    "print \"\\nPr is %0.2f N  \"%(Pr)#"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 26-3 - Page 699"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "P is 22.936 kW   \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, sin, cos, tan\n",
+    "Zp=24#\n",
+    "Zg=72#\n",
+    "alphan=20*pi/180#\n",
+    "phi=24*pi/180#\n",
+    "N=720#\n",
+    "mn=5#\n",
+    "b=50#\n",
+    "sigut=600#\n",
+    "BHN=360#\n",
+    "Cs=1.4#\n",
+    "FOS=2#\n",
+    "sigb=sigut/3#\n",
+    "dp=mn*Zp/cos(phi)#\n",
+    "Zp=Zp/(cos(phi))**3#\n",
+    "Zg=Zg/(cos(phi))**3#\n",
+    "Y=0.358+((0.364-0.358)*1.48/2)#\n",
+    "Sb=b*mn*sigb*Y#\n",
+    "Q=(2*Zg)/(Zp+Zg)#\n",
+    "K=0.16*(BHN/100)**2#\n",
+    "Sw=b*dp*Q*K/(cos(phi)**2)#\n",
+    "v=2*pi*N*dp/(60*2*1000)#\n",
+    "Cv=5.6/(5.6+sqrt(v))#\n",
+    "Peff=Sb/FOS#\n",
+    "Pt=Peff*Cv/Cs#\n",
+    "P=Pt*v#\n",
+    "P=P*10**-3#\n",
+    "print \"P is %0.3f kW   \"%(P)#\n",
+    "#The difference in the value is due to rounding-off of the values."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## exa 26-4 - Page 700"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "mn is 2.5 mm   \n",
+      "\n",
+      "TC is 1965 N  \n",
+      "\n",
+      "Sb is 5790.8 N  \n"
+     ]
+    }
+   ],
+   "source": [
+    "from math import sqrt, pi, sin, cos, tan, atan\n",
+    "Zp=25#\n",
+    "Zg=100#\n",
+    "P=5000#\n",
+    "N=2000#\n",
+    "alphan=20*pi/180#\n",
+    "phi=15*pi/180#\n",
+    "sigut=660#\n",
+    "Cs=1.5#\n",
+    "FOS=1.8#\n",
+    "v=10#\n",
+    "Zp1=Zp/(cos(phi))**3#\n",
+    "Zg1=Zg/(cos(phi))**3#\n",
+    "Y=0.348+(0.74*0.004)#\n",
+    "sigb=sigut/3#\n",
+    "Cv=5.6/(5.6+sqrt(v))#\n",
+    "#Sb=FOS*Peff\n",
+    "mn=FOS*P*Cs*60*1000*2*cos(phi)/(2*pi*N*Cv*Zp*12*sigb*Y)#\n",
+    "mn=mn**(1/3)#\n",
+    "mn=2.5#\n",
+    "dp=mn*Zp/cos(phi)#\n",
+    "Q=(2*Zg)/(Zp+Zg)#\n",
+    "b=12*mn#\n",
+    "Sb=12*sigb*Y#\n",
+    "K=Sb*(cos(phi)**2)/(dp*Q*b)#\n",
+    "BHN=sqrt(K/0.16)*100#\n",
+    "dg=mn*Zg/cos(phi)#\n",
+    "phip=mn+(0.25*sqrt(dp))#\n",
+    "ep=16+(1.25*phip)#\n",
+    "phig=mn+(0.25*sqrt(dg))#\n",
+    "eg=16+(1.25*phig)#\n",
+    "e=ep+eg#\n",
+    "e=e*10**-3#\n",
+    "r1=dp/2#\n",
+    "r2=dg/2#\n",
+    "Pd=e*N*Zp1*b*r1*r2/(2530*sqrt(r1**2+r2**2))#\n",
+    "v=2*pi*N*dp/(60*2*1000)#\n",
+    "#Let tangential component be TC\n",
+    "TC=(Cs*1845/mn)+(Pd*cos(alphan)*cos(phi))#\n",
+    "\n",
+    "Sb=b*mn*sigb*Y#\n",
+    "print \"mn is %0.1f mm   \"%(mn)#\n",
+    "print \"\\nTC is %0.0f N  \"%(TC)#\n",
+    "print \"\\nSb is %0.1f N  \"%(Sb)#\n",
+    "#The difference in the value  of Sb is due to rounding-off of t"
+   ]
+  }
+ ],
+ "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
+}