The 48" pitch refers to the theoretical 48" the prop (and thus plane) moves thru the air in one revolution.
So 48" x 2400 rpm=115200 inches per minute x 60= 6912000 inches per hour / 12 = 576000 feet per hour / 5280= 109.09 miles per hour. This is in a perfect world. Bill To: [email protected] CC: [email protected]; [email protected] From: [email protected] Date: Mon, 25 Jan 2010 17:42:51 +0000 Subject: RE: [ercoupe-tech] Re: PROP PITCH So far, the replies I have read speak of a change in RPM. My question related to two props with different pitches turning at the same RPM. The replies related to a change in rpm. It is common sense that to move just to move the same amount of air, a 48 pitch would need to turn more rpm than a 51 pitch. Sooooooooo, in order to have better take off characteristics, the 48 pitch must be turning at a considerably higher RPM. My Coupe is in the reassemble stage, else I would put on different props and do the measurements. There must be someone out there much smarter than me that knows of a formular that calculates the difference in air movement. Hold on, I erred, correction, there are many out there much smarter than me. Lee Browning ____________________________________________________________ Banking Click here to find the perfect banking opportunity! _________________________________________________________________ Hotmail: Trusted email with powerful SPAM protection. http://clk.atdmt.com/GBL/go/196390707/direct/01/
