Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.93.67.82] verified) by logan.com (CommuniGate Pro SMTP 4.1b9) with ESMTP id 2474470 for flyrotary@lancaironline.net; Mon, 14 Jul 2003 10:02:51 -0400 Received: from o7y6b5 (clt78-221.carolina.rr.com [24.93.78.221]) by ms-smtp-01.southeast.rr.com (8.12.5/8.12.2) with SMTP id h6EDuepN026277 for ; Mon, 14 Jul 2003 09:56:41 -0400 (EDT) Message-ID: <01c701c34a11$c1b0e140$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: 2nd and 3rd run logs Date: Mon, 14 Jul 2003 10:11:01 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01C4_01C349F0.3A547CA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_01C4_01C349F0.3A547CA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable While it is true the injectors are staged with the secondaries coming in = at around 15" HG (around 2700 rpm), if the system is set up as Tracy = recommends with the injector on-off switches, you can run at low rpm = (idle) with either the primary or secondary on or off (well, one set = must be on {:>)). The processor simply doubles the injector Pulse width = to compensate for the lack of the second pair of injectors. While my = engine does like to idle a bit better on the primaries, it will idle on = either set. As I mentioned, if you are idling on the primaries and switch them off = the secondaires may stumble a moment before kicking in, but if you = enrich the mixture slightly before turning off the primaries, the = secondaries will catch and keep the engine running.=20 At higher engine rpms both primaries and secondaries are on (staged) and = turning off either one does not seem to cause the engine to stumble as = it will if you do this while at low rpm (below staging point). Ed Anderson ----- Original Message -----=20 From: John Slade=20 To: Rotary motors in aircraft=20 Sent: Monday, July 14, 2003 12:00 AM Subject: [FlyRotary] Re: 2nd and 3rd run logs Rusty, As I understand it, the injectors are staged. The secondaries only cut = in at a certain rpm. So, if you're rpm is below the staging point, and = you kill the primaries you have no fuel and engine will quit. Above the = staging point the secondaries would be supplying fuel. Just a theory, = but it makes sense to me... Regards, John -----Original Message----- From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net]On Behalf Of Russell Duffy Sent: Sunday, July 13, 2003 10:25 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: 2nd and 3rd run logs If there is any way you could possibly squeeze me in for a = "look-see" I would be eternally grateful. I have a friend here who has a = Cozy MkIV and is interested in installing the same setup on his = aircraft. If you would consider "show and tell", we'd sure like a peek = at it. Thanks, and congratulations on bringing the engine to life. Paul = Conner, Mobile, AL (251) 662-1944 sqpilot@earthlink.net =20 Hi Paul, If someone will confirm that the engine should die when turning off = the primary injectors at low power, I'll be airport bound next weekend. = I thought I'd get a quick answer, and the suspense is killing me. I'll = end up calling Tracy tomorrow if nobody replies. If that doesn't work = out, or if you want to come by before the weekend, you're welcome to = come see it at the house as well. Bring a tach that works :-) =20 Cheers, Rusty ------=_NextPart_000_01C4_01C349F0.3A547CA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
While it is true the injectors are = staged with the=20 secondaries coming in at around 15" HG (around 2700 rpm), if the system = is set=20 up as Tracy recommends with the injector on-off switches, you can run at = low rpm=20 (idle) with either the primary or secondary on or off (well, one set = must be on=20 {:>)).  The processor simply doubles the injector Pulse width to = compensate for the lack of the second pair of injectors.  While my = engine=20 does like to idle a bit better on the primaries, it will idle on either=20 set.
 
As I mentioned, if you are idling on = the primaries=20 and switch them off the secondaires may stumble a moment before kicking = in, but=20 if you enrich the mixture slightly before turning off the primaries, the = secondaries will catch and keep the engine running.
 
At higher engine rpms both primaries = and=20 secondaries are on (staged) and turning off either one does not seem to = cause=20 the engine to stumble as it will if you do this while at low rpm (below = staging=20 point).
 
Ed Anderson
 
 
----- Original Message -----
From:=20 John=20 Slade
Sent: Monday, July 14, 2003 = 12:00=20 AM
Subject: [FlyRotary] Re: 2nd = and 3rd run=20 logs

Rusty,
As I=20 understand it, the injectors are staged. The secondaries only cut in = at a=20 certain rpm. So, if you're rpm is below the staging point, and you = kill the=20 primaries you have no fuel and engine will quit. Above the staging = point the=20 secondaries would be supplying fuel. Just a theory, but it makes sense = to=20 me...
Regards,
John
 
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Russell=20 Duffy
Sent: Sunday, July 13, 2003 10:25 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: 2nd and 3rd = run=20 logs

If there is any way you could possibly = squeeze me in=20 for a "look-see" I would be eternally grateful. I have a friend here = who has=20 a Cozy MkIV and is interested in installing the same setup on his = aircraft.=20 If you would consider "show and tell", we'd sure like a peek at it. = Thanks,=20 and congratulations on bringing the engine to life. Paul Conner,=20 Mobile, AL (251) 662-1944    sqpilot@earthlink.net =20

 

Hi=20 Paul,

 

If = someone will=20 confirm that the engine should die when turning off the primary = injectors at=20 low power, I=92ll be airport bound next weekend.  I thought = I=92d get a=20 quick answer, and the suspense is killing me.  I=92ll end up = calling=20 Tracy tomorrow = if nobody=20 replies.  If that doesn=92t work out, or if you want to come by = before=20 the weekend, you=92re welcome to come see it at the house as = well.  Bring=20 a tach that works :-) 

 

Cheers,

Rusty

 

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