Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3c1) with ESMTP id 744241 for flyrotary@lancaironline.net; Fri, 18 Feb 2005 09:51:59 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-185-127.carolina.rr.com [24.74.185.127]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j1IEp8kd021895 for ; Fri, 18 Feb 2005 09:51:10 -0500 (EST) Message-ID: <006001c515c9$4bb881c0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Digital Fuel Monitoring System Date: Fri, 18 Feb 2005 09:51:14 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005D_01C5159F.62A94150" 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 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_005D_01C5159F.62A94150 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks, Grant, for the comments on the resistors. I think it just = offends Finn's esthetic values {:>) I sent the photos to your Grant.Schemmel@aeroflex.com as that is the = only e mail I have for you. If that is not your home e mail then drop = me a note off the list at eanderson@carolina.rr.com=20 Ed ----- Original Message -----=20 From: Schemmel, Grant=20 To: Rotary motors in aircraft=20 Sent: Friday, February 18, 2005 8:56 AM Subject: [FlyRotary] Re: Digital Fuel Monitoring System Hi Ed, I wouldn't sweat the "resistor on legs" issue too much, it only = becomes a vibration issue with parts that have a large mass. I work for = a company that builds space grade circuit cards, and used to work on PT6 = fuel controls when I worked for Hamilton Standard, so I've seen typical = construction for this kind of application. If you are worried about = axial leaded components, mount them close to the circuit card and put a = dab of epoxy under them for bonding. On an aside, I would appreciate a photo of your board emailed direct, = as my workplace blocks all jpegs. Thanks Grant Schemmel -----Original Message----- From: Ed Anderson [mailto:eanderson@carolina.rr.com] Sent: Friday, February 18, 2005 5:57 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Digital Fuel Monitoring System Geez, Finn, I was unaware that there was a "protocol" for resistor = sizes on PC boards. Seriously, is there some reason (vibration?) for = forcing resistors all the way to the board or is it just "esthetics?". Ed A ----- Original Message -----=20 From: Finn Lassen=20 To: Rotary motors in aircraft=20 Sent: Thursday, February 17, 2005 11:06 PM Subject: [FlyRotary] Re: Digital Fuel Monitoring System Nice. I assume those resistors are just temporary until you get hold of = smaller ones that can actually rest on the PCB rather than hanging in = their legs? I know it's not flight critical, but still... Finn Ed Anderson wrote: Here are a couple of photos of my homebrew digital fuel = monitoring system, I have mentioned in the past (seems like I've been = working on it forever). Got the PC board in today and got it mostly = populated with the components. It will sit in a 2 1/4" instrument case = with the LCD extending out past the boundary of the case. I plan on = trying some vacuum molding of thin ABS plastic to form a attractive = front cover. The front panel shows the LCD display screen as well as the push = buttons for loading fuel, setting alarms and selecting which screen you = wish to display. The center shaft controls the LCD backlite so it will = be visible either in day or night. Hopefully, I have designed and constructed the board properly = (my first microcomputer/controller board) and if so, then the software = (which I have completed) will be loaded and it will be installed in the = aircraft for testing. I certainly plan on having it installed for Sun & = Fun. Ed ------=_NextPart_000_005D_01C5159F.62A94150 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks, Grant, for the comments on the=20 resistors.  I think it just offends Finn's esthetic values=20 {:>)
 
I sent the photos to your Grant.Schemmel@aeroflex.com as=20 that is the only e mail I have for you.  If that is not your home e = mail=20 then drop me a note off the list at eanderson@carolina.rr.com=20
 
Ed
----- Original Message -----
From:=20 Schemmel, Grant
Sent: Friday, February 18, 2005 = 8:56=20 AM
Subject: [FlyRotary] Re: = Digital Fuel=20 Monitoring System

Hi=20 Ed,
 
I=20 wouldn't sweat the "resistor on legs" issue too much, it only becomes = a=20 vibration issue with parts that have a large mass.  I work for a = company=20 that builds space grade circuit cards, and used to work on PT6 fuel = controls=20 when I worked for Hamilton Standard, so I've seen typical construction = for=20 this kind of application.  If you are worried about axial leaded=20 components, mount them close to the circuit card and put a dab of = epoxy under=20 them for bonding.
 
On=20 an aside, I would appreciate a photo of your board emailed direct, as = my=20 workplace blocks all jpegs.
 
Thanks
 
Grant Schemmel
-----Original Message-----
From: Ed Anderson=20 [mailto:eanderson@carolina.rr.com]
Sent: Friday, February = 18, 2005=20 5:57 AM
To: Rotary motors in aircraft
Subject:=20 [FlyRotary] Re: Digital Fuel Monitoring System

Geez, Finn, I was unaware that = there was a=20 "protocol" for resistor sizes on PC boards.  Seriously, is = there some=20 reason (vibration?) for forcing resistors all the way to the board = or is it=20 just "esthetics?".
 
Ed A
----- Original Message ----- =
From:=20 Finn Lassen
To: Rotary motors in = aircraft=20
Sent: Thursday, February = 17, 2005=20 11:06 PM
Subject: [FlyRotary] Re: = Digital Fuel=20 Monitoring System

Nice.

I assume those resistors are just = temporary=20 until you get hold of smaller ones that can actually rest on the = PCB=20 rather than hanging in their legs? I know it's not flight = critical, but=20 still...

Finn

Ed Anderson wrote:
Here are a couple of photos of = my homebrew=20 digital fuel monitoring system, I have mentioned in the past = (seems like=20 I've been working on it forever).  Got the PC board in = today and=20 got it mostly populated with the components.  It will sit = in a 2=20 1/4" instrument case with the LCD extending out past the = boundary of the=20 case.  I plan on trying some vacuum molding of thin ABS = plastic to=20 form a  attractive front cover.
 
The front panel shows the = LCD display=20 screen as well as the push buttons for loading fuel, setting = alarms and=20 selecting which screen you wish to display.  The center = shaft=20 controls the LCD backlite so it will be visible either in day or = night.
 
Hopefully, I have designed and = constructed=20 the board properly (my first microcomputer/controller board) and = if so,=20 then the software (which I have completed)  will be loaded = and it=20 will be installed in the aircraft for testing.  I certainly = plan on=20 having it installed for Sun & Fun.
 
Ed
=
 
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