Return-Path: Received: from fed1mtao01.cox.net ([68.6.19.244] verified) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2648865 for flyrotary@lancaironline.net; Thu, 23 Oct 2003 22:58:13 -0400 Received: from Leonards ([68.111.228.182]) by fed1mtao01.cox.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20031024025725.BWUK2935.fed1mtao01.cox.net@Leonards> for ; Thu, 23 Oct 2003 22:57:25 -0400 From: "David Leonard" To: "'Rotary motors in aircraft'" Subject: Engine/ Prop selection Date: Thu, 23 Oct 2003 19:57:32 -0700 Message-ID: <002201c399da$9230ae50$b6e46f44@Leonards> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0023_01C3999F.E5D1D650" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.3416 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0023_01C3999F.E5D1D650 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Although not a rotary issue, this was a post in response to yet another question about which engine/prop combo is best for an RV. It's from the So-Cal RV list. >Engine and prop selection will depend a lot on personal factors. > >For instance, if you have a tailwheel instead of a nosewheel, you >will probably need to overcompensate in other ways. Many guys do >this by buying the bigger engine with C/S prop > >Likewise if you fly out of Chino you will probably need the bigger >engine. Since nobody actually lives in Chino the additional speed is >necessary to make the commute home more palatable. That 5 >minutes/per hour flight time savings feels real satisfying when >you're going 10mph on the 91. > >If you plan on flying an all electric airplane with lot's of engine >monitors and moving maps, then it doesn't matter. There is no >difference in perceived climb or speed when your head is buried in >the cockpit. > >To make the best possible engine/prop decision you must eventually >decide which of two groups you intend to please. The first group is >women. The second group consists of aging, nerdy, often balding >engineering type males. > >Women don't care about engines or props; with them you are better >off going cheap and spending the differential buying them gifts and >trying to get. . . > >The nerdy-male(NM) group requires not only a larger engine, but >insist it be coupled with a constant speed prop. Thus, while the >O-320 fixed pitch guys are with the beautiful women, the NM's can >spend endless hours discussing . . ."MANIFOLD PRESSURE" > >The engine/prop decision is ultimately about catering to one of >these two groups. Of course, if you are one of the NM's to begin >with, you are already invisible to beautiful women and might as well >buy the big engine and C/S prop. > >I hope I've been helpful. > >John Allen > > With all that in mind, I think my next project will be a...... > > IO-540 RV-8 !!!!!!!!!! David Leonard The Rotary Roster: http://members.aol.com/_ht_a/rotaryroster/index.html ------=_NextPart_000_0023_01C3999F.E5D1D650 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Although not a = rotary issue, this was a post in response to yet another question about which = engine/prop combo is best for an RV. It’s from the So-Cal RV = list.

>Engine = and prop selection will depend a lot on personal factors.

>

>For instance, = if you have a tailwheel instead of a nosewheel, you

>will probably = need to overcompensate in other ways. Many guys do

>this by buying = the bigger engine with C/S prop

>

>Likewise if you = fly out of Chino you will probably = need the bigger

>engine. Since = nobody actually lives in Chino the additional speed is

>necessary to = make the commute home more palatable. That 5

>minutes/per = hour flight time savings feels real satisfying when

>you're going = 10mph on the 91.

>

>If you plan on = flying an all electric airplane with lot's of engine

>monitors and = moving maps, then it doesn't matter. There is no

>difference in = perceived climb or speed when your head is buried in

>the = cockpit.

>

>To make the = best possible engine/prop decision you must eventually

>decide which of = two groups you intend to please. The first group is

>women. = The second group consists of aging, nerdy, often balding

>engineering = type males.

>

>Women don't = care about engines or props; with them you are better

>off going cheap = and spending the differential buying them gifts and

>trying to get. = . .

>

>The = nerdy-male(NM) group requires not only a larger engine, but

>insist it be = coupled with a constant speed prop. Thus, while the

>O-320 fixed = pitch guys are with the beautiful women, the NM's can

>spend endless = hours discussing . . ."MANIFOLD PRESSURE"

>

>The engine/prop = decision is ultimately about catering to one of

>these two = groups. Of course, if you are one of the NM's to begin

>with, you are = already invisible to beautiful women and might as well

>buy the big = engine and C/S prop.

>

>I hope I've = been helpful.

>

>John = Allen

>

> With all that = in mind, I think my next project will be a......

>

> IO-540 RV-8 !!!!!!!!!!

David Leonard

The Rotary = Roster:

http://members.aol.com/_ht_a/rotaryr= oster/index.html

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