X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from access.aic-fl.com ([207.30.253.2] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1996120 for flyrotary@lancaironline.net; Fri, 20 Apr 2007 13:41:27 -0400 Received-SPF: softfail receiver=logan.com; client-ip=207.30.253.2; envelope-from=unicorn@gdsys.net Received: from main (gdsi-27.gdsys.net [207.30.255.27]) by access.aic-fl.com (Rockliffe SMTPRA 4.5.6) with SMTP id for ; Fri, 20 Apr 2007 12:36:15 -0500 Message-ID: <001601c7837b$617bae20$1bff1ecf@main> From: "Richard Sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Single Rotor Testing Date: Fri, 20 Apr 2007 13:40:33 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01C78351.780E6F30" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0013_01C78351.780E6F30 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: Lehanover@aol.com=20 To: Rotary motors in aircraft=20 Sent: Friday, April 20, 2007 9:12 AM Subject: [FlyRotary] Re: Single Rotor Testing In a message dated 4/20/2007 8:08:10 A.M. Eastern Daylight Time, = echristley@nc.rr.com writes: The most interesting fact of this test is the possibility of a power = > estimate. Calculated power using a BSFC of .5 is 30 hp. Looking at = the=20 > power curve of the LeMans engine, this is about 10% below of what = is=20 > shown there. From this, I believe the projected over 100hp at = 7500RPM=20 > is within reach. > =20 > Richard Sohn > N2071U Just looking at a dyno sheet from one of my bridge ported 12As shows = 218.2 HP at 7,500 RPM, 152.6 foot pounds, 1517 and 1494 EGT, .673 BSFC, 164 degrees oil, = 100.1 PSI oil pressure, and A/F of 12.1. This engine is not used at that low an RPM so it is not tuned to be = ideal there. It is used between 7,800 RPM (229.4 HP) and 9,600 (242.2 = HP) with peak power at 9,400 RPM ( 244.8 HP). With a Pport and some work on tuned lengths, perhaps 120 HP at 7,500 = RPM. is available. Sun&Fun is still ongoing. You all should be there. A Renesis engine = with a Marcotte reduction is under power each day. Art Rudko Lutz = Florida. 1-813-792-2787. Land at Zephyr hills and rent a car. Also buy your tickets at the = counter inside. Free Zephyrhills water in the cooler. Very good.=20 Lynn E. Hanover The 4000RPM I am running at is driven by my setup. My direct drive = load prop is not good for much more. In addition, the mixture ratio is = just what the carb is giving me. May be I can find the parts to better = tune it. My final solution is with an adjustable carb, but this is some = down the road after the side housings are settled. Richard Sohn N2071U -------------------------------------------------------------------------= ----- See what's free at AOL.com.=20 -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 269.5.5/769 - Release Date: = 4/19/2007 5:56 PM ------=_NextPart_000_0013_01C78351.780E6F30 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
----- Original Message -----
From:=20 Lehanover@aol.com
Sent: Friday, April 20, 2007 = 9:12=20 AM
Subject: [FlyRotary] Re: Single = Rotor=20 Testing

In a message dated 4/20/2007 8:08:10 A.M. Eastern Daylight Time, = echristley@nc.rr.com = writes:
The=20 most interesting fact of this test is the possibility of a power =
>=20 estimate. Calculated power using a BSFC of .5 is 30 hp. Looking at = the=20
> power curve of the LeMans engine, this is about 10% below = of what=20 is
> shown there. From this, I believe the projected over = 100hp at=20 7500RPM
> is within reach.
> 
> Richard=20 Sohn
> N2071U
Just looking at a dyno sheet from one of my bridge ported 12As = shows=20 218.2 HP at 7,500
RPM, 152.6 foot pounds, 1517 and 1494 EGT, .673 BSFC, 164 degrees = oil,=20 100.1 PSI oil pressure, and A/F of 12.1.
 
This engine is not used at that low an RPM so it is not tuned to = be ideal=20 there. It is used between 7,800 RPM (229.4 HP) and 9,600 (242.2 HP) = with peak=20 power at 9,400 RPM ( 244.8 HP).
 
With a Pport and some work on tuned lengths, perhaps 120 HP at = 7,500 RPM.=20 is available.
 
Sun&Fun is still ongoing. You all should be there. A Renesis = engine=20 with a Marcotte reduction is under power each day. Art Rudko Lutz = Florida.=20 1-813-792-2787.
 
Land at Zephyr hills and rent a car. Also buy your tickets at the = counter=20 inside. Free Zephyrhills water in the cooler. Very good.
 
Lynn E. Hanover

The 4000RPM I am running at is driven by my = setup. My=20 direct drive load prop is not good for much more. In addition, the = mixture=20 ratio is just what the carb is giving me. May be I can find the parts = to=20 better tune it. My final solution is with an adjustable carb, but this = is some=20 down the road after the side housings are settled.
Richard Sohn
N2071U

See what's free at AOL.com.=20

No virus found in this incoming message.
Checked by AVG Free = Edition.
Version: 7.5.446 / Virus Database: 269.5.5/769 - Release = Date:=20 4/19/2007 5:56 PM
------=_NextPart_000_0013_01C78351.780E6F30--