No, force is not work, but force * distance is. And airplanes move a distance and therefore do work. See if your Mom can Fedex that physics book.
http://forums.jetcareers.com/cfi-corner/43771-horsepowe...
Is it possible to covert between pounds of thrust and horsepower for an airplane engine? How is it done? - question from David, Michael Hickey, Danny Williamson, Diego Codagnone, John Thomas, Pashaee & Brad Hornsby...
www.aerospaceweb.org/question/propulsion/q0195.shtml
[Archive] Pounds thrust to horsepower Tech Log ... Mirv, The conversion from Thrust to Horsepower is not a straight conversion of units, such as Kilometres per Hour to Miles per Hour, it depends upon the Thrust and the speed of the aircraft, as derived from the basic relationship where -;
www.pprune.org/archive/index.php/t-194018.html
Re: How do lbs. of thrust equate to in horsepower? Area: Physics ; Posted By: David Winsemius, MadSci Admin; Date: Sat Jul 12 10:09:17 1997; Area of science: Physics ; ID: 867608558.Ph ... Horsepower is a unit of power (33,000 foot pounds/min or 550 ft lb/sec). Power measures amount of work done over a defined period.
www.madsci.org/posts/archives/aug97/868739149.Ph.r.html
The formula on page 575 follows as best I can render it: Pounds thrust = (horsepower * 33,000)/(pitch * rpm) I should work up a table. What's tjhe rpm and pitch of some trolling motors? Mike Holt...
www.psubs.org/mlist/archive/0101/msg00098.html
This combined effect drops propeller efficiency to about 87 %. From there the thrust horsepower provided by the propeller is; ... where: = thrust (lb) ; = velocity (ft/s) ; = engine brake horsepower ; 550 = conversion factor from ft-lbs to horsepower ; = propeller efficiency ;
www.allstar.fiu.edu/aero/Propulsion2.htm
Did you find us useful ... Please consider supporting the site with a small donation. ... Check out our Conversion Software for Windows.
www.onlineconversion.com/horsepower.htm www.onlineconversion.com/horsepower.htm
Sailing Talks - A sailing Community, Horsepower vs Thrust? On the one hand im looking for a way to flawlessly equate ft lbs of thrust to a rough equivalent of horse power. I know it is not quiet which simple ... Re:Horsepower vs Thrust? - 2006/03/12 10:45...
www.sailingtalks.com/forums/gear/11550-horsepower-vs-th... www.sailingtalks.com/forums/gear/11550-horsepower-vs-thrust.html
Sailing Talks - A sailing Community, Horsepower vs Thrust? I`m eagerly looking for a way to fatally equate ft lbs of thrust to a rough equivalent of horse power. I mutually know it is not quite that simple so ... Horsepower vs Thrust? - 2006/03/13 02:19 I`m eagerly looking for a way to fatally equate ft lbs of thrust to...
www.sailingtalks.com/forums/gear/11512-horsepower-vs-th... www.sailingtalks.com/forums/gear/11512-horsepower-vs-thrust.html
More importantly, it's useful to remember the conversion in the form given above, because the numbers involved are easy to manipulate mentally: ... Anonymous query via Google (2004-11-23) Power to Speed Ratio; Horsepower to thrust conversion... [at a given speed along the thrust]
home.att.net/~numericana/answer/formula.htm