X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from imo-m16.mx.aol.com ([64.12.138.206] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1905067 for flyrotary@lancaironline.net; Tue, 06 Mar 2007 11:01:08 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.206; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m16.mx.aol.com (mail_out_v38_r7.6.) id q.c94.b1d5294 (52354) for ; Tue, 6 Mar 2007 11:00:06 -0500 (EST) Received: from FWM-M08 (fwm-m08.webmail.aol.com [64.12.168.72]) by ciaaol-r02.mx.aol.com (v114_r3.2) with ESMTP id MAILCIAAOLR028-cc8245ed90052b3; Tue, 06 Mar 2007 11:00:05 -0500 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] 20b vs. Renesis for Lancair ES? Date: Tue, 06 Mar 2007 11:00:05 -0500 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8C92E1FA41FCDC4_183C_3E28_FWM-M08.sysops.aol.com" X-Mailer: AOL WebMail 24126 Received: from 65.161.241.3 by FWM-M08.sysops.aol.com (64.12.168.72) with HTTP (WebMailUI); Tue, 06 Mar 2007 11:00:05 -0500 Message-Id: <8C92E1FA422301A-183C-222F@FWM-M08.sysops.aol.com> X-AOL-IP: 64.12.168.72 X-Spam-Flag: NO ----------MB_8C92E1FA41FCDC4_183C_3E28_FWM-M08.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Michael, It depends on what RPM you can use. The Renesis only makes that kind of pow= er between 8500-9000 RPM. You would need a 3:1 psru at least. The 20b will produce 250 HP at a much lo= wer RPM and lower stress level. Al G dynoed his 20B at 295 hp @ 6800 RPM if=20= I remember correctly. (might have been 285) Al chime in if you see this. The= 20B is 50% bigger. (or 1/3 if you prefer) The engine simply doesn't have to= be as highly stressed to produce power. For the ES GET THE 20B! It's still=20= lighter than the 550 and will be easier to balance. Even with the rotary the= old saying applies; There is no substitute for cubic inches! Provided that=20= the engine will FIT in the airframe. This isn't a problem with the 20B. The=20= ES is set up for the 6 cyl so you would have a reasonable job fitting the 20= B in. My $.02 Bill Jepson =20 =20 -----Original Message----- From: michael@aeromotogroup.com To: flyrotary@lancaironline.net Sent: Tue, 6 Mar 2007 2:20 AM Subject: [FlyRotary] 20b vs. Renesis for Lancair ES? I think I=E2=80=99m going to buy the used 20b I posted about a couple weeks=20= ago. But over the weekend I read that a stock Renesis engine makes 250 hp a= nd can easily be tweaked to hit 300. =20 So my question, before I commit myself to the 20b, is whether people recomme= nd bumping up the horsepower slightly on a Renesis (lighter engine so less h= p somewhat offset by weight reduction) rather than using a 20b. I haven=E2= =80=99t seen any recent discussion on this and couldn=E2=80=99t find anythin= g in the archives, but I=E2=80=99m sure it was covered at length at some poi= nt. =20 Is the Renesis a candidate for an ES? =20 Thanks, =20 Michael McMahon Lancair ES ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from= AOL at AOL.com. ----------MB_8C92E1FA41FCDC4_183C_3E28_FWM-M08.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8"

Michael,

It depends on what RPM you can use. The Renesis only makes that k= ind of power between 8500-9000 RPM.

You would need a 3:1 psru at least. The 20b will produce 250 HP at a mu= ch lower RPM and lower stress level. Al G dynoed his 20B at 295 hp @ 6800 RP= M if I remember correctly. (might have been 285) Al chime in if you see this= . The 20B is 50% bigger. (or 1/3 if you prefer) The engine simply doesn't ha= ve to be as highly stressed to produce power. For the ES GET THE 20B! It's sti= ll lighter than the 550 and will be easier to balance. Even with the rotary=20= the old saying applies; There is no substitute for cubic inches! Provided th= at the engine will FIT in the airframe. This isn't a problem with the 20B. T= he ES is set up for the 6 cyl so you would have a reasonable job fitting the= 20B in. My $.02

Bill Jepson

-----Original Message-----
From: michael@aeromotogroup.com
To: flyrotary@lancaironline.net
Sent: Tue, 6 Mar 2007 2:20 AM
Subject: [FlyRotary] 20b vs. Renesis for Lancair ES?

I think I=E2=80=99m going to buy the used 20b I p= osted about a couple weeks ago. But over the weekend I read that a sto= ck Renesis engine makes 250 hp and can easily be tweaked to hit 300.<= /FONT>

So my question, before I commit myself to the 20b= , is whether people recommend bumping up the horsepower slightly on a Renesi= s (lighter engine so less hp somewhat offset by weight reduction) rather tha= n using a 20b. I haven=E2=80=99t seen any recent discussion on this an= d couldn=E2=80=99t find anything in the archives, but I=E2=80=99m sure it wa= s covered at length at some point.

Is the Renesis a candidate for an ES?

Thanks,

Michael McMahon

Lancair ES

AOL now offers free email to everyone. Find out more about what's free from= AOL at AOL.com.<= br />

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