CENTRIFUGAL FORCE - AGAIN 1

[CGOFM]

Hello to all...
I have chased down a few threads to see comments on calculating centrifugal force and end up with so many different answers by experts...

Can anyone verify my calculation...gravity is not part of this at the moment:

r (radius) = 0.1524 m (6 inches)
m (mass/weight) = 0.227272727 kg (0.5 lbs)
rpm = 250

[w = 2*3.14*250/60 = 26.18 rad/s]

CF = m*w*w*r = 23.7395 Newtons or 5.3368 lbs

 

[GregLocock]

Yoar are right to at least one sf

Cheers

Greg Locock

SIGlease see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[SomptingGuy]

... what sort of mechanism though? Is "r" a crank radius?

- Steve

 

[CGOFM]

Hello Greg...
Thanks for your response.
As a consequence, this also helped me build a calculator in excel, where i can change any of the 3 variables, giving me results in metric and english.
Greatly appreciated,
Christoph

 

[CGOFM]

Hi Steve...
Yes it's a crank radius.
I'm building a double piston of my own design.
Should be interesting....
What is your automotive specialty?
Thanks...Christoph

 

[GregLocock]

As Steve hints, I assumed that the r term was the effective raius of the mass... not its overall radius.

Cheers

Greg Locock

SIGlease see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[SomptingGuy]

Well... That is the radial force required to rotate a point mass at that radius. But it's unlikely that your system is that simple.

(My specialty? Check out "My Info". It's fairly up-to-date)

- Steve