On 5/29/19 11:31 AM, Richard (Rick) Karlquist wrote:
On 5/29/2019 10:27 AM, charlie@thegallos.com wrote:
Thanks Jim,
That makes 100% sense, was wondering where the "Magic" 2x and 4x came
from, as I was expecting to see a COS in there somewhere, and moment
arms (I know enough to know that)
It may seem that trigonometry is always necessary to make these
calculations. However, in many cases, the forces can be determined
without trigonometric functions by using similar triangles. There
is a tendency to jump right in with trig functions whether they
are essential or not.
Exactly.. a 45,45,90 triangle makes it easy. There's really 3 numbers
you need to remember - 0.707, 0.5, 0.866 - and then make your problem
either 30,45, or 60 degrees.
Now, if you want to start computing the forces as you hoist it up, then
it gets a bit more complicated...
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