Return-Path: Received: from fed1rmmtao05.cox.net ([68.230.241.34] verified) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP id 456231 for flyrotary@lancaironline.net; Thu, 07 Oct 2004 11:25:07 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.34; envelope-from=ALVentures@cox.net Received: from BigAl ([68.107.116.221]) by fed1rmmtao05.cox.net (InterMail vM.6.01.03.04 201-2131-111-106-20040729) with ESMTP id <20041007152436.CZOJ5019.fed1rmmtao05.cox.net@BigAl> for ; Thu, 7 Oct 2004 11:24:36 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Low power 20B operation Date: Thu, 7 Oct 2004 08:24:41 -0700 Message-ID: <001201c4ac81$c4480770$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01C4AC47.17EB7960" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0013_01C4AC47.17EB7960 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 Al, You may have answered this already, but have you checked the injector = spray patterns? It is possible that they "click" ok while the fuel orifices = are plugged with some gunk. I took mine and safety wired them to the = injector manifold, hooked up a fuel supply, hit them with 12v and observed the = spray patterns. Probably a waste of time, but it would tell you that you're getting a good mix of fuel into each chamber.=20 Mark; No I haven't tested them myself, but sent them off the RC Engineering = who cleaned, flow tested and checked the pattern. There has just been a few hours on the dyno and on the plane, but that doesn't mean there couldn't = be something in there, although there is a 20 micron filter in the line. = First I need to eliminate any electronic issues. I'm not sure the pattern is = of that much concern on the primary; there is that little plastic deflector below the injector. I don't know if the fuel actually sprays on that, = or if it just causes some turbulence in the runner right there for better = mixing. BTW, Initially I had incorrectly wired my injector relay. It took me a while to figure out what I had done wrong and correct it. I got it = wired correctly now... I think. So did I, but caught that in the first runs on the dyno. Al ------=_NextPart_000_0013_01C4AC47.17EB7960 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 

Al,
You may have answered this already, but have you checked the injector = spray patterns?  It is possible that they "click" ok while the = fuel orifices are plugged with some gunk.  I took mine and safety wired = them to the injector manifold, hooked up a fuel supply, hit them with 12v and = observed the spray patterns.  Probably a waste of time, but it would tell = you that you're getting a good mix of fuel into each chamber.

Mark;

No I haven’t tested them myself, but sent them off the RC Engineering = who cleaned, flow tested and checked the pattern.  There has just been a few = hours on the dyno and on the plane, but that doesn’t mean there = couldn’t be something in there, although there is a 20 micron filter in the = line.  First I need to eliminate any electronic issues.  I’m not = sure the pattern is of that much concern on the primary; there is that little = plastic deflector below the injector.  I don’t know if the fuel = actually sprays on that, or if it just causes some turbulence in the runner right there = for better mixing.

BTW, Initially I had incorrectly wired my injector relay.  It took = me a while to figure out what I had done wrong and correct it.  I got it = wired correctly now... I think.

So did I, but caught that in the first runs on the dyno.

Al

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