On Tuesday 19 July 2016 18:27:10 Ian Kelly wrote: > On Tue, Jul 19, 2016 at 2:35 PM, Gene Heskett <ghesk...@shentel.net> wrote: > > And I am not familiar with this foot-poundals per second that you > > question about, but just from the wording I'd say it is a fifty > > dollar way to say horsepower. > > https://en.wikipedia.org/wiki/Foot-poundal > > > Which is defined in the area of exerting a force > > to a 440 pound weight, sufficient to lift that weight one foot in > > one second. > > 1 (imperial) horsepower is 550 (not 440) foot-pounds per second. A > foot-pound is the energy transferred by exerting a 1-pound force > through a displacement of 1 foot. A pound is the force needed to > accelerate 1 pound-mass at 32.174 ft/s**2 (the acceleration of > gravity). A poundal in contrast is the force needed to accelerate 1 > pound-mass at 1 ft/s**2. A foot-poundal therefore is the energy > transferred by exerting a 1-poundal force through a displacement of 1 > foot. A foot-poundal is thus (approximately) 1/32.174 of a foot-pound. > > Multiplying it out, 1 horsepower is approximately 17695.7 > foot-poundals per second. > > Ah, the machinations that users of imperial units have to endure.
Thanks for the correction, and the explanation. I should have checked at wikipedia myself. I don't know where I got the 440 from unless its yards from the tree to the trap when drag racing. I did a bit of that 60 years back, discovered it was an expen$ive hobby. Bring lots and lots of money if you want to play with the big dogs. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> -- https://mail.python.org/mailman/listinfo/python-list
