X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Sender: To: lml Date: Thu, 14 Dec 2006 20:15:43 -0500 Message-ID: X-Original-Return-Path: Received: from nlpi025.sbcis.sbc.com ([207.115.36.54] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1675870 for lml@lancaironline.net; Thu, 14 Dec 2006 19:27:43 -0500 Received-SPF: none receiver=logan.com; client-ip=207.115.36.54; envelope-from=whiskeyb@sbcglobal.net Received: from PhiPounder (adsl-75-26-160-175.dsl.scrm01.sbcglobal.net [75.26.160.175]) (authenticated bits=0) by nlpi025.sbcis.sbc.com (8.13.8 smtpauth/dk/8.13.8) with ESMTP id kBF0QPfJ011374 for ; Thu, 14 Dec 2006 18:26:26 -0600 Received: from 127.0.0.1 (AVG SMTP 7.1.409 [268.15.19/587]); Thu, 14 Dec 2006 16:26:36 -0800 X-Original-Message-ID: <000901c71fdf$ae5a25a0$6401a8c0@PhiPounder> From: "Wally Bestgen" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Prop De-ice Failure Warning X-Original-Date: Thu, 14 Dec 2006 16:26:36 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C71F9C.A02188E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C71F9C.A02188E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Craig, I have the same concerns. I have been working with a EE and have a = working prototype. I will use three of these modules. One for the = pitot heat, one for the fuel valve solenoid (Lancair Turbine fuel = system) and one for the prop heat. The system will measures the = current draw and will be adjustable to the individual component. When a = predetermined differential is detected the annunciator panel will = display a fault light. You can contact me at 530-273-4042 if you are = interested. Wally Bestgen=20 ----- Original Message -----=20 From: Craig Berland=20 To: lml@nlpi005.sbcis.sbc.com=20 Sent: Thursday, December 14, 2006 2:49 PM Subject: [LML] Prop De-ice Failure Warning I have a 4 blade MT prop with de-ice boots on my IV-P. I have not = confirmed the current draw but for this discussion lets say each boot = pulls 5 amps at 24 volts. So if all 4 blades were on and working, the = total current draw would be 20 amps. I would like to obtain an = electronic device that would measure the current draw and trigger a = warning light and thus a voice warning in my Master Warning System = Display if the de-ice switch was on and the current draw was less than = 18 amps. The goal is to prevent one blade from tuning into a frozen = stump and causing a big prop imbalance. Please help this electronically = challenged mechanical engineer. Craig Berland ------=_NextPart_000_0006_01C71F9C.A02188E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Craig,
 
I have the same concerns.  I have = been working=20 with a EE and have a working prototype.  I will use three of these=20 modules.  One for the pitot heat, one for the fuel valve solenoid = (Lancair=20 Turbine fuel system)  and one for the prop heat.  The system = will=20 measures the current draw and will be adjustable to the individual=20 component.  When a predetermined differential is=20 detected the annunciator panel will display a fault=20 light.  You can contact me at 530-273-4042 if you are=20 interested.
 
Wally Bestgen 
----- Original Message -----
From:=20 Craig=20 Berland
Sent: Thursday, December 14, = 2006 2:49=20 PM
Subject: [LML] Prop De-ice = Failure=20 Warning

I = have a 4 blade=20 MT prop with de-ice boots on my IV-P.  I have not confirmed the = current=20 draw but for this discussion lets say each boot pulls 5 amps at 24=20 volts.  So if all 4 blades were on and working, the total current = draw=20 would be 20 amps.  I would like to obtain an electronic device = that=20 would measure the current draw and trigger a warning light = and thus=20 a voice warning in my Master Warning System Display if the de-ice = switch=20 was on and the current draw was less than 18 amps.  The goal is = to=20 prevent one blade from tuning into a frozen stump and causing a big = prop=20 imbalance.  Please help this electronically challenged mechanical = engineer.
Craig=20 Berland
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