Steve, K7LXC wrote,
> Howdy, TowerTalkians --
>
> I'm trying to compare rotator specs and Alfa Radio just threw me a
> curve. Everything I'd been reading was in in-lbs until I came to the AR
> website
> that listed the specs in Lb-ins. I couldn't find an online conversion
> program
> to convert the Lb-ins to in-lbs. I would say that the 2 specs are different.
> Am I wrong? Do you know of a conversion site that'll do it?
>
> I'm not even close to being an engineer so just looking for a little
> clarification. Tnx. And excuse my ignorance.
I'm not very close to being an engineer, either, but I'm a physicist by
training, so I'll
have a go at the question.
Quick answer : no difference.
When one applies a force on the end of a lever in order to "twist" or rotate
something,
[like tightening or loosening a bolt, or keeping your Porsche's chassis off the
ground,]
the mathematical product of the force applied and the length of the lever arm
is called
"torque". So, a 10 pound force on a 12" lever gives a torque of 120
inch-pounds, or
120 pound inches. You get your choice of which order, because we are talking
about
a number system where the order of multiplication doesn't affect the answer...
[the
commutative law] i.e. 10x12=12x10... either way you get 120, and inches x
pounds
= pounds x inches.
It's been almost 50 years, [I can't believe it!] but I believe that's all OK.
73,
George T Daughters, K6GT
CU in the California QSO Party (CQP)
October 3-4, 2009
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|