Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 763854 for flyrotary@lancaironline.net; Mon, 28 Feb 2005 21:37:00 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050301023615.KUYT2033.imf24aec.mail.bellsouth.net@rd> for ; Mon, 28 Feb 2005 21:36:15 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] testing injectors Date: Mon, 28 Feb 2005 20:36:59 -0600 Message-ID: <008701c51e07$8ae78440$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0088_01C51DD5.404D1440" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0088_01C51DD5.404D1440 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I recall someone posting that you could test to see if an injector is = firing by just attaching 12 volts + and - to the two pins of the injectors, and = you should hear a click. Is this a very subtle click, or fairly loud and = easy to hear?=20 =20 It's a pretty noticeable click. Whack the side of the injector a few = times with the handle of a hammer to see if that frees it up. =20 =20 I have the peak and hold type injectors if that matters at all. (72 = lb/hr). I touched the two wires to the injector's pins, and I believe I was only hearing the faint spark caused by the wires making contact. After about = 5 seconds with the two wires still touching the pins, the injector got = pretty hot. Sound terminal or normal? =20 =20 Let's just say that if it wasn't dead before... :-) These are low resistance injectors, about 2 ohms, so you were putting 6 amps through = the coil. They call these peak and hold, because they hit them with full voltage for just long enough to pull them in, then drop the voltage to a lower level, which is sufficient to hold them in. They do this to make = them react quickly, but limit the current they have to endure. =20 =20 I called Dave Atkins and he said to send the injector to him, and = he would check it out. If need be, he has replacement injectors. Don't know = the cost (don't really care, just want one). Sounded like he was in a hurry, = so I didn't keep him on the phone. Thanks for any info you guys might have = to offer regarding testing the injectors, etc. Paul Conner=20 =20 If you place your order on Summit tonight, you'll have it via FedEx Home delivery Thursday :-) =20 Cheers, Rusty (flow meter on the way) ------=_NextPart_000_0088_01C51DD5.404D1440 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
I recall someone posting that you = could test=20 to see if an injector is firing by just attaching 12 volts + and - to = the two=20 pins of the injectors, and you should hear a click.  Is this a very = subtle=20 click, or fairly loud and easy to hear? 
 
It's a pretty noticeable click.  Whack the = side of the=20 injector a few times with the handle of a hammer to see if that frees it = up.   
    
 I=20 have the peak and hold type injectors if that matters at all. (72 = lb/hr). =20 I touched the two wires to the injector's pins, and I believe I was only = hearing=20 the faint spark caused by the wires making contact.  After about 5 = seconds=20 with the two wires still touching the pins, the injector got pretty hot. = Sound=20 terminal or normal?  
 
Let's just say that if it wasn't dead before... = :-)   These are low resistance injectors, about 2 ohms, = so you=20 were putting 6 amps through the coil.  They call these peak and = hold,=20 because they hit them with full voltage for just long enough to pull = them in,=20 then drop the voltage to a lower level, which is sufficient to=20 hold them in.  They do this to make them react quickly, but = limit the=20 current they have to = endure.  
 
      I = called Dave=20 Atkins and he said to send the injector to him, and he would check it = out. If=20 need be, he has replacement injectors. Don't know the cost (don't really = care,=20 just want one). Sounded like he was in a hurry, so I didn't keep him on = the=20 phone. Thanks for any info you guys might have to offer regarding = testing the=20 injectors, etc.  Paul Conner 
 
If you place your order on Summit tonight, = you'll have it=20 via FedEx Home delivery Thursday = :-)
 
Cheers,
Rusty (flow meter on the=20 way)
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