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Diffstat (limited to '2921/CH2/EX2.2/Ex2_2.sce')
-rwxr-xr-x | 2921/CH2/EX2.2/Ex2_2.sce | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/2921/CH2/EX2.2/Ex2_2.sce b/2921/CH2/EX2.2/Ex2_2.sce new file mode 100755 index 000000000..395c3bc56 --- /dev/null +++ b/2921/CH2/EX2.2/Ex2_2.sce @@ -0,0 +1,28 @@ +clc; +clear; +mprintf('MACHINE DESIGN \n Timothy H. Wentzell, P.E. \n EXAMPLE-2.2 Page 28 ') //Example 2.2 + +G=3.6; //Diffential ratio +N=3500/G; //[rpm] Axle rotational speed +d=30; //[in] Diameter of tire +dist=N/(60)*(%pi*d) //[in] Distance traveled in 1 sec +dist=dist/12; //[ft] Distance traveled in 1 sec +t=1; //[sec] Time period +F=864; //[lb] Force exerted by tire on road surface + +W=F*dist; //[ft*lb] Workdone in 1 sec +P=F*dist/t; //[ft*lb/sec] Power +hp=P/550; //[hp] Power in horse power 1hp=550 ft*lb/sec + +mprintf('\n\n Power to do work %f hp',hp); + +//Comparing it to motor output: + +Tm=300*12; //[in*lb] Engine torque +Nm=3500; //[rpm] Engine speed +Pm=Tm*Nm/63000; + +mprintf('\n Motor output %f hp',Pm); +mprintf('\n The power output equaled the power at tire/road surface.'); + +//Note: The deviation of answer from the answer given in the book is due to round off error.(In the book values are rounded while in scilab actual values are taken) |