X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-db01.mx.aol.com ([205.188.91.95] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with ESMTP id 4587033 for flyrotary@lancaironline.net; Sun, 21 Nov 2010 07:12:23 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.91.95; envelope-from=Lehanover@aol.com Received: from imo-da04.mx.aol.com (imo-da04.mx.aol.com [205.188.169.202]) by imr-db01.mx.aol.com (8.14.1/8.14.1) with ESMTP id oALCBeOa010697 for ; Sun, 21 Nov 2010 07:11:40 -0500 Received: from Lehanover@aol.com by imo-da04.mx.aol.com (mail_out_v42.9.) id q.efe.e949344 (37564) for ; Sun, 21 Nov 2010 07:11:35 -0500 (EST) Received: from magic-m23.mail.aol.com (magic-m23.mail.aol.com [172.20.22.196]) by cia-mb04.mx.aol.com (v129.7) with ESMTP id MAILCIAMB041-92bc4ce90c7727e; Sun, 21 Nov 2010 07:11:35 -0500 From: Lehanover@aol.com Message-ID: Date: Sun, 21 Nov 2010 07:11:35 EST Subject: Re: [FlyRotary] Nitro in a rotary aircraft - N/A 20B? To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_f1f09.19fbdcf0.3a1a6677_boundary" X-Mailer: 9.0 Security Edition for Windows sub 5382 X-AOL-IP: 72.187.199.116 X-Spam-Flag:NO X-AOL-SENDER: Lehanover@aol.com --part1_f1f09.19fbdcf0.3a1a6677_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 11/21/2010 1:28:05 A.M. Eastern Standard Time, dmlobner@gmail.com writes: Some talk on HomeBuiltAirplanes.com forums brought up the question, has someone ever used nitrous oxide on a rotary aircraft install? I'm pretty sure a supercub-type plane did that awhile back (on a Lyco) for a super short takeoff roll using a fixed pitch cruise prop (with a crapton of HP at takeoff). That's close to my application in the end, probably with a N/A 20B, hence the interest. Tracy, how would your EC3 handle short bursts of nitro? Would that totally throw the mixture curve, would I need to manual adjust while doing it, or would it auto compensate somehow? Thanks! Dustin Rockford, IL That answer is just this morning on Paul Lamar's news group. _http://www.rotaryeng.net/index.html_ (http://www.rotaryeng.net/index.html) With a dyno sheet from a turbo and Nitrous drag racer 501 HP and 414 foot pounds at about 5,500 RPM. Nitrous contains oxygen, and a heavy dose of fuel is injected (from a 3rd injector?) along with the Nitrous to account for the HP gain and to help cool the pieces. The mixture is then way over rich. Ken Welter has this figured out, and does this to get his sea plane up on the step. He also shuts off the trailing ignition during Nitrous to prevent detonation. This is a good application for the expensive ceramic apex seals. When you double the HP, parts that had been deemed reliable often turn up in the oil pan. This is not a project for the timid. Practice engine out landings before hitting that Nitrous button the first time. I do not know the ignition timing used during a Nitrous shot, but suspect it is close to zero. Lynn E. Hanover --part1_f1f09.19fbdcf0.3a1a6677_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 11/21/2010 1:28:05 A.M. Eastern Standard Time,=20 dmlobner@gmail.com writes:
Some=20 talk on HomeBuiltAirplanes.com forums brought up the question, has someo= ne=20 ever used nitrous oxide on a rotary aircraft install?  I'm pretty= sure a=20 supercub-type plane did that awhile back (on a Lyco) for a super short= takeoff=20 roll using a fixed pitch cruise prop (with a crapton of HP at takeoff).&= nbsp;=20 That's close to my application in the end, probably with a N/A 20B, henc= e the=20 interest.

Tracy, how would your EC3 handle short bursts of nitro?=  =20 Would that totally throw the mixture curve, would I need to manual adjus= t=20 while doing it, or would it auto compensate=20 somehow?

Thanks!

Dustin
Rockford,=20 IL
That answer is just this morning on Paul Lamar's news group. &nb= sp; http://www.rotaryeng.= net/index.html
 
With a dyno sheet from a turbo and Nitrous drag racer
 
501 HP and 414 foot pounds at about 5,500 RPM. 
 
Nitrous contains oxygen, and a heavy dose of fuel is injected (from= a 3rd=20 injector?) along with the Nitrous to account for the HP gain and to help= cool=20 the pieces. The mixture is then way over rich.
 
Ken Welter has this figured out, and does this to get his sea plane= up on=20 the step. He also shuts off the trailing ignition during Nitrous to preven= t=20 detonation. This is a good application for the expensive ceramic apex= =20 seals.
 
When you double the HP, parts that had been deemed reliable ofte= n turn=20 up in the oil pan. This is not a project for the timid. Practice engine ou= t=20 landings before hitting that Nitrous button the first time.
 
I do not know the ignition timing used during a Nitrous shot, but sus= pect=20 it is close to zero.
 
Lynn E. Hanover  
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