Return-Path: Received: from [65.33.162.59] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 4.2b8) with HTTP id 321918 for flyrotary@lancaironline.net; Thu, 15 Jul 2004 00:19:14 -0400 From: "Marvin Kaye" Subject: Re: [FlyRotary] Re: Jim Ayers - M/T Props To: "Rotary motors in aircraft" X-Mailer: CommuniGate Pro WebUser Interface v.4.2b8 Date: Thu, 15 Jul 2004 00:19:14 -0400 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit "DaveLeonard" wrote: """ I was really thinking about getting an MT as well, until some of the guys on the ACRE list told me about how many people are finding that the MT is significantly slower than a FP alum prop. Seems like a whole bunch of money to spend on something that doesn't help a lot. """ Interesting.... there's a significant contingent of Lancair operators flying MT props, with IVP's getting 350kts and 360's getting well in excess of 200, 220 not unusual. Sounds to me like there's another agenda here. I imagine it might be possible to get higher top ends with a fixed pitch aluminum prop, but that prop is going to be optimized for that flight regime and that regime only. Consequently you're going to see lower rates of climb and anemic performance during slower speed operations. That's the main reason for the variable pitch prop, to get maximum available performance during all phases of operation. To make a blanket statement that the MT underperforms some other prop doesn't tell the whole story, but I'm sure I'm preaching to the choir. FWIW.