Return-Path: <13brv3@bellsouth.net> Received: from [205.152.59.65] (HELO imf17aec.bellsouth.net) by logan.com (CommuniGate Pro SMTP 4.1b9) with ESMTP id 2472876 for flyrotary@lancaironline.net; Sat, 12 Jul 2003 11:34:59 -0400 Received: from rad ([68.212.2.57]) by imf17aec.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030712153428.TNJI13258.imf17aec.bellsouth.net@rad> for ; Sat, 12 Jul 2003 11:34:28 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: We have ignition Date: Sat, 12 Jul 2003 10:34:30 -0500 Message-ID: <006401c3488b$164ee8b0$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0065_01C34861.2D78E0B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0065_01C34861.2D78E0B0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable How did you have your tach hooked up? =20 I have it hooked up to one of the AC Delco ignition coil trigger = signals. According to Tracy, this will give one pulse per revolution. I figured = that I'd set the tach up for "4 cyl", which should look for 2 pulses per rev. Naturally, that will give me a reading that is exactly half of the real = rpm, but that's easy to mentally correct. At the same time, it's very close = to being the actual prop rpm. I'll have to look again at the switch = settings, but I think I have the tach configured properly. =20 =20 and how are you going to hook it up next? =20 The tach has an optional mode of using it with the alternator output. = It counts the less than perfectly regulated pulses that the alternator = leaves on the buss. You have to do some trial and error with this method, and = even some manual adjustment of a pot, which of course requires a way to = actually measure the rpm while doing this. I still think the easiest way to make this work should be with the ignition trigger, so hopefully, I'll get = that going. =20 =20 Which tach is it? =20 It's a VDO "cockpit black" series unit, as are all my temporary gauges. = My requirement was to get VDO, because it would give me the proper sensors, = and to get matching gauges, so I can either use them in the Airbike, or sell them as a set. I'd hate to figure out what I've spent on these = temporary gauges and sensors, but it's probably in the $250-$300 range. =20 =20 I'd like to know as I may need to buy some minimum instrumentation to = put in the panel so I can get my final inspection, before I receive the EM-2.=20 =20 I've realized that I could add a fuel gauge, and be legal, so I may end = up doing that if the EM-2 doesn't appear in time to have my inspection. = Here, we can fly the minute the inspector hands us the paperwork, but I don't intend to fly before the EM-2 arrives, unless Tracy adds some more = features :-) =20 Rusty =20 =20 =20 ------=_NextPart_000_0065_01C34861.2D78E0B0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

    How did you have your tach hooked = up?

 

I have it hooked up to one of the = AC Delco ignition coil trigger signals.  According to Tracy, this will give = one pulse per revolution.  I figured that I’d set the tach up for = “4 cyl”, which should look for 2 pulses per rev.  Naturally, = that will give me a reading that is exactly half of the real rpm, but that’s = easy to mentally correct.  At the same time, it’s very close to = being the actual prop rpm.  I’ll have to look again at the switch = settings, but I think I have the tach configured properly.  =

 

 and how are you going to hook it up = next?

 

The tach has an optional mode of = using it with the alternator output.  It counts the less than perfectly = regulated pulses that the alternator leaves on the buss.  You have to do some = trial and error with this method, and even some manual adjustment of a pot, = which of course requires a way to actually measure the rpm while doing = this.  I still think the easiest way to make this work should be with the = ignition trigger, so hopefully, I’ll get that going.  =

 

 Which tach is it?

 

It’s a VDO “cockpit = black” series unit, as are all my temporary gauges.  My requirement was to = get VDO, because it would give me the proper sensors, and to get matching = gauges, so I can either use them in the Airbike, or sell them as a set.  = I’d hate to figure out what I’ve spent on these temporary gauges and = sensors, but it’s probably in the $250-$300 range. 

 

I'd like to know as I may need to buy some minimum instrumentation to put in the panel so I can get my final inspection, = before I receive the EM-2.

 

I’ve realized that I could = add a fuel gauge, and be legal, so I may end up doing that if the EM-2 = doesn’t appear in time to have my inspection.  Here, we can fly the minute = the inspector hands us the paperwork, but I don’t intend to fly before = the EM-2 arrives, unless Tracy adds some more features :-)

 

Rusty 

 

 

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