Return-Path: Received: from [24.25.9.101] (HELO ms-smtp-02-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 84292 for flyrotary@lancaironline.net; Sat, 22 May 2004 10:52:36 -0400 Received: from EDWARD (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-02-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i4MEqXNs027126 for ; Sat, 22 May 2004 10:52:35 -0400 (EDT) Message-ID: <001501c4400c$6d1e6430$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: New cooling Ducts Date: Sat, 22 May 2004 10:52:38 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0012_01C43FEA.E5CED0D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0012_01C43FEA.E5CED0D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yes, Bill, I recall our conversation. I like the thermistor idea as the = heavy wire required for thermocouples that I attempted was a real pain = routing and connecting. Now my question to you is what kind of simple = data collector could I use to collect the output of the thermistor? I = presume I need some sort of A/D converter. I do have a lap top if I = just had the program {:>). Any suggestion for thermistors, I know I = could probably figure it out, but if you have any suggestions based on = experience, I would like to hear it. Since I don't intend to change the duct attachment scheme to radiators, = I can always place any combination of old and new ducts on the aircraft = (hopefully). =20 Ed Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: William=20 To: Rotary motors in aircraft=20 Sent: Saturday, May 22, 2004 9:44 AM Subject: [FlyRotary] Re: New cooling Ducts Ed, Since you are building two new ducts, I would like to propose that you = also install the thermistors so you can do the following set of tests = (briefly mentioned at SNF). Basically at a steady power setting in = flight, and potentially at different air speeds, measure the following = temperatures: Tin left, Tout left , Tout right 1. With your *current setup*, with one reshaped duct and one original = duct. 2. With your current left duct and one of the new ducts, and 3. with both new ducts. Since you are plumbed in series, and have identical rads, this will = give us information on the performance of the ducts. Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Friday, May 21, 2004 6:58 PM Subject: [FlyRotary] New cooling Ducts Well enough of that, since the new C drive will apparently enable = the engine to turn 1000 rpm higher, I decided that was good enough = reason to finish my experiment with the cooling duct that turned out = well. Rather than filling in the other duct with expandable foam, I've = decided to build two new ducts with the proper curve built into the = walls. So will be using the Streamline coordinate system (modified). = Since there is not enough space for the full distance, I will truncate = the streamline coordinates as I did on the test duct. Consultation with = the gentleman who wrote the excellent article on liquid cooling in the = January 2004 Sport Aviation and my own test indicated that as long as = the duct was truncated from the inlet end, the adverse effects on = airflow should be minimal. So, will get started on that probably next week early. Got the = coordinates laid out in my old Cadd package only to find out that its = printer drivers will not drive the new HP printer I recently got. So I = guess I'll try converting the CADD to a DWG file and go to one of the = CADD packages I acquired over the year but never really used to see if = they have the correct driver. One thing or the other. Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ------=_NextPart_000_0012_01C43FEA.E5CED0D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Yes, Bill, I recall our = conversation.  I like=20 the thermistor idea as the heavy wire required for thermocouples that I=20 attempted was a real pain routing and connecting.  Now my question = to you=20 is what kind of simple data collector could I use to collect the output = of the=20 thermistor?  I presume I need some sort of A/D converter.  I = do have a=20 lap top if I just had the program {:>).  Any suggestion for = thermistors,=20 I know I could probably figure it out, but if you have any suggestions = based on=20 experience, I would like to hear it.
 
Since I don't intend to change the duct = attachment=20 scheme to radiators, I can always place any combination of old and new = ducts on=20 the aircraft (hopefully). 
 
Ed
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From:=20 William=20
Sent: Saturday, May 22, 2004 = 9:44=20 AM
Subject: [FlyRotary] Re: New = cooling=20 Ducts

Ed,
Since you are building two new ducts, = I would=20 like to propose that you also install the thermistors so you can do = the=20 following set of tests (briefly mentioned at SNF).  Basically at = a steady=20 power setting in flight, and potentially at different air=20 speeds, measure the following temperatures:
Tin left, Tout left , Tout = right
 
1. With your *current setup*, with = one reshaped=20 duct and one original duct.
2. With your current left duct and = one of the new=20 ducts, and
3. with both new ducts.
 
Since you are plumbed in series, and = have=20 identical rads, this will give us information on the performance of = the=20 ducts.
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From:=20 Ed Anderson
To: Rotary motors in = aircraft=20
Sent: Friday, May 21, 2004 = 6:58=20 PM
Subject: [FlyRotary] New = cooling=20 Ducts

Well enough of that, since the new = C drive will=20 apparently enable the engine to turn 1000 rpm higher, I decided that = was=20 good enough reason to finish my experiment with the cooling duct = that turned=20 out well.  Rather than filling in the other duct with = expandable foam,=20 I've decided to build two new ducts with the proper curve built into = the=20 walls.  So will be using the Streamline coordinate system=20 (modified).  Since there is not enough space for the full = distance, I=20 will truncate the streamline coordinates as I did on the test=20 duct.  Consultation with the gentleman who wrote the excellent = article=20 on liquid cooling in the January 2004 Sport Aviation and my = own test=20  indicated   that as long as the duct was truncated = from the=20 inlet end, the adverse effects on airflow should be = minimal.
 
So, will get started on that = probably next week=20 early.  Got the coordinates laid out in my old Cadd package = only to=20 find out that its printer drivers will not drive the new HP printer = I=20 recently got.  So I guess I'll try converting the CADD to a DWG = file=20 and go to one of the CADD packages I acquired over the year but = never really=20 used to see if they have the correct driver. One thing or the=20 other.
 
 
 
Ed Anderson
RV-6A N494BW Rotary=20 Powered
Matthews, = NC
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