AboutMarc Ebelini Expertise Basis aircraft and engine maintenance. Avionics and other electronic questions related to computers and radio communications.
Experience FAA licensed comercial pilot, A&P mechanic, former authorized inspector, ground instructor certified in aircraft, powerplant and radio navigation. FCC commercial license.
Expert: Marc Ebelini Date: 3/18/2008 Subject: Engines
Question What is the power rating in horsepower of some common commercial light aircraft engines? For example, the Rolls Royce BR725 used in the new Gulfstream650?(It says that the thrust is 71.6kN. Is there any way to convert this to horsepower)?
Answer Sorry to say I do not maintain a data base for such information. Jet engines are not rated in horsepower. One newton is .224809 pounds of force that is not directly related to horsepower. So it's not simple to convert from one to another. There are equations that relate to this but I don't have one to give you. Not to stray from the subject but the automobile industries uses pound/feet for it's torque rating rather than Foot/pounds. Why, because of the dynamics are different.
Foot/pound is a static measurement whereas pound/feet is a dynamic one. It would be hard to measure torque in foot pounds on a rotating shaft. Pound/feet takes rotational speed into account. Rating a jet in horse power returns the similar problem therefore newtons are used. Remember horsepower requires movement, Force does not. Hope I explained clearly enough.
