Re: [CAD_CAM_EDM_DRO] Re: relay help req. (horsepower definitions)

I'm with you there Jon....you'd need at least a 40 Amp breaker to provide 6
HP.

As for the HP formula developed by Watt...IMO that was one of the stupidest
formulas ever developed.
How big and what kind of draft horse was used...large/small
Clydesdale...Percheron...or ???
Did he make that horse move 33000 pounds per foot per minute all day long or
just for a limited time...like say for only a minute?
How many times did he perform the test? How many horses did he use? ETC.

Not only did he develop his formula based on an arbitrary horse selection,
he didn't even have enough sense to use more manageable figures...like say
500 pounds per sec or 30000 pounds per minute...which would make
calculations a whole lot simpler.

As for lifting 33000 pounds....any horse can do that...just use enough
rope/cable and pulleys. Doing it so as to move the load

How those shyster sales people come up with the inflated figures is probably
something like what I learned in college once. Based on "instantaneous"
loads, it can be done. What is necessary is to determine at what point (in
time) the resistance in the motor is at it's lowest point. At that
particular instant, apply the current at it's maximum voltage (based on the
sine wave of the applied voltage). It's abaolutely amazing how much useable
values can be distorted in this manner!

In fact, this is (according to my old instructor) is one of the reasons
light bulbs burn out....too much voltage/current applied at the wrong
instant of time.

Smoke