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25th December 2013, 08:49
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 904
[SOLVED]Closed: Re: What is the Units of Mi and T in the equation T = Mi X acc?
thank you godfreyl,thats cleared some of my doubts,thank you very much :)

24th December 2013, 18:13
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[SOLVED]Closed: What is the Units of Mi and T in the equation T = Mi X acc?
What is the Unit of Moment of Inertia in the Torque Equation T = Mi X Acceleration?
and what will be the Unit of resulting torque value?
for example.if the Mi = 33Nm^2 ( 3.37 Kg.meter^2) and... 
23rd December 2013, 20:14
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Closed: Re: Algorithm to find out how much Torque is necessary by a DC motor to rotate a roto
Sorry,im back after some gap,
Another simple doubt was raised,the SI unit of Moment of Inertia is kg.m² not Nm² right??
thank you 
13th December 2013, 16:33
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Closed: Re: Algorithm to find out how much Torque is necessary by a DC motor to rotate a roto
Well,the the Mi of the shaft was calculated including the blades right?
how can i calculate the Mi of the blade again???
Thank you :) 
12th December 2013, 18:40
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Closed: Re: Algorithm to find out how much Torque is necessary by a DC motor to rotate a roto
so by taking the calculations you made and the theorem you said "Any minimum torque τ is enough to accelerate any Moment of Inertia (MI) with an angular acceleration α"
i think i need not worry... 
11th December 2013, 15:52
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Closed: Re: Algorithm to find out how much Torque is necessary by a DC motor to rotate a roto
yes,thank you that makes sense...
the torque after overcoming the bearing friction,will accelarate the mass,if the torque is more,then it accelerates the shaft quicker,if the torque is low,the... 
11th December 2013, 06:53
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 2,149
Closed: Re: Algorithm to find out how much Torque is necessary by a DC motor to rotate a roto
thank you all for helping me understand this thing , my assumption on torque was wrong so far..
ill revisit the static friction part later,that is a hard one i guess so
... 
11th December 2013, 05:42
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Closed: Re: Algorithm to find out how much Torque is necessary by a DC motor to rotate a roto
So u mean that the 12v dc motor can rotate the 1kg metal plate wen it the shaft is connected to the CG but the angular velocity will be very low ? Did i get that right ??
So this 12v motor cannot... 
10th December 2013, 20:15
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Closed: Re: Algorithm to find out how much Torque is necessary by a DC motor to rotate a roto
Thank u god n chow,i understood wat u explained n i agree with it,but my confusion is there will be some intertia,as the weight of the blades sum up to 4.5 kg,so the motor has to apply some amount of...

10th December 2013, 17:09
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Closed: Algorithm to find out how much Torque is necessary by a DC motor to rotate a rotor...
Simple question about on how much Torque is necessary by a DC motor to rotate a rotor arrangement..
This image below sums up my question more clear,its a hypothetical setup i know,but its just... 
10th December 2013, 16:29
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Closed: Re: Serial port programming in Visual Studio >Visual Basic> Windows form application
use the Serial class communicate through serial port with the device
Serial.getPortNames()  gets you the port available on windows
Serial.baudrate() to set baud rate,and partiy,timeout and... 
19th November 2013, 15:38
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Closed: Re: Need help understanding the Torque produced by a Engine...and how prvent engine s
Well,as far as i know,the Engine with 6.5HP and 11Nm torque connected to that 3 Kg of blades will not be able to start the engine,so the blades need to be rotated manually or engine should be cranked...

18th November 2013, 19:37
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Closed: Re: Need help understanding the Torque produced by a Engine...and how prvent engine s
@Barry
Well,i agree with what you said,i am new to the field of mechanics,well,it would be tough for some one from the field of coding and logic to real world Mechanical physics,atleast for me....... 
15th November 2013, 13:27
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Closed: Need help understanding the Torque produced by a Engine...and how prvent engine stall
i am little confused about Torque which is measured in Newton meter...
Aussume,i have a engine which produces a 11Nm of torque at 2500RPM
the shaft of the engine is connected to a steel pipe... 
24th May 2013, 21:59
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Closed: Re: what would be the weight of a aluminium metal with these dimensions?
you helped me though,thank you :)

24th May 2013, 21:46
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Closed: Re: what would be the weight of a aluminium metal with these dimensions?
   Updated   
oh sorry,not a cube,a rectangular shape it is.as all the sides are not symmetrical 
24th May 2013, 21:08
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Closed: what would be the weight of a aluminium metal with these dimensions?
Assume a Aluminium Cube with length of 15 inch and 1.14 inch width and thickness of about 1 inch.
15 inch = 0.381 meter
1.14 inch = 0.028956 meter
1 inch = 0.0254 meter
so the total volume... 
21st May 2013, 16:51
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Closed: How can i run a BLDC motor continuously and control the speed of it in a easy and pri
How can i run a BLDC motor continuously and control the speed of it in a easy and primitive way?
i know,just by applying power,a BLDC wont rotate like normal DC motors,but they need some kind of... 
17th May 2013, 12:22
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Closed: Re: 1 Kilogramforce in upward direction = force which is able to lift 1 Kilogram of
yes,sorry,was a typo, i meant 9.8 m/s^2
i mean ,the earths gravity which is 1 Newton = which is 9.8 m/s^2,so so a 0.98kg of mass /0.98Kilogramforce would have `9.8 newtons of force,if i am... 
16th May 2013, 18:47
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Closed: 1 Kilogramforce in upward direction = force which is able to lift 1 Kilogram of mass
So that states that a 5 Kilogram force upwards can lift a 5 Kilogram of mass in earths gravity,which is 9.8N
like wise,a 100Kgf can lift 100Kg of mass....
so please tell me if my assumption is... 
10th May 2013, 20:18
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Closed: Re: what's the speed of blades of ceiling fan in miles/hour,where the RPM of the fan
yes,i do have the lift coefficient of the blade,which is 1.318,i got it from the FoilSim applet
and i divided the blade in 10 parts along using 1/10 of the total area of the blade in the... 
10th May 2013, 18:57
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Closed: Re: what's the speed of blades of ceiling fan in miles/hour,where the RPM of the fan
so i guess to calculate the lift of a rotor blade,which will see increasing airspeed from rotor as you go towards the tip
the blade has to be divided into ten parts and the Lift equation should... 
10th May 2013, 17:15
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Closed: Re: what's the speed of blades of ceiling fan in miles/hour,where the RPM of the fan
so in a heli rotor,there would be more lift at the tip and the lift decreases as you go towards the center...
so geometric twist are applied on the blades,where the AOA is decreased from the... 
10th May 2013, 16:11
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Closed: Re: what's the speed of blades of ceiling fan in miles/hour,where the RPM of the fan
i'm just trying to learn and clear my confusion and ready to learn from learned one.. may be i'm not that good explaining my question...
you said "then the blade tip is moving at 41MPH relative to... 
10th May 2013, 13:41
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Closed: Re: what's the speed of blades of ceiling fan in miles/hour,where the RPM of the fan
thank you all,now i get the idea,the angular velocity on any point on blade is same but the linear velocity changes as the radius increases
for a 300 RPM angular velocity = 300RPM * (2*Pi) =1,884...
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