X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 930475 for flyrotary@lancaironline.net; Mon, 02 May 2005 17:42:57 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-189-178.carolina.res.rr.com [24.74.189.178]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j42Lg8Lw023893 for ; Mon, 2 May 2005 17:42:09 -0400 (EDT) Message-ID: <002401c54f5f$cb8d2700$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fuse or CB? Date: Mon, 2 May 2005 17:42:10 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0021_01C54F3E.44497A80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0021_01C54F3E.44497A80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I can certainly relate to how good it feels to get your baby home. = Pulled up in my hangar and sighed after the flight home. Have a great trip, Tracy. Remember you are driving out there - much = more dangerous than flying - so keep on your toes and watch for closing = traffic. Ed ----- Original Message -----=20 From: Tracy Crook=20 To: Rotary motors in aircraft=20 Sent: Monday, May 02, 2005 4:14 PM Subject: [FlyRotary] Re: Fuse or CB? Human nature sure is entertaining : ) =20 Real world experience is what decides this sort of thing for me. = Several here have related experiences where a breaker got then out of a = jamb. I could add a couple of more examples but I've given them before = and it's a long story. Can anyone give an example (no theoretical ones = please) of where a fuse saved them and a breaker would not? Jim's point about PROPER fuse sizing (being as good as a breaker) has = some validity but the crux is "proper". It is not arguable (IMO) that = mistakes are made by us humans. We may not anticipate some situation = that can cause the fuse to blow or the CB to open. Which one gives you = a second chance? =20 In other news, Finally got 600 feet of dry runway (my personal = minimum) and flew the RV-4 home from Lake City. Practiced short field = approaches for 30 minutes then touched down at 60 mph. Didn't touch = down prematurely (in the water) like last time. Hardly any brakes = needed and stopped in 400 feet. Good to have the bird home again. Tracy (departing for Colorado Wednesday) > >Here is Bob K's and his well reasoned argument FOR fuses > = >http://www.aeroele= ctric.com/articles/Rev9/ch10-9pdf > > The keystone of Bob's endorsement of fuses: When the failure manifests itself by opening the breaker or fuse likelihood of recovering the system by replacing a fuse or pushing in a breaker is very, very small. Beneath it all, this is what all the fuse versus circuit = breaker=20 discussions hinge on. It is an incorrect assumption, in my = experience. A very large percentage (but by no means all) of electrical = problems in vehicles are intermittent in nature. You can very often = reset=20 the breaker and restore the critical system long enough to safely = land the=20 aircraft. A fuse does not give you this option, at least not in a = timely=20 manner. >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0021_01C54F3E.44497A80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I can certainly relate to how good it feels to = get your=20 baby home.  Pulled up in my hangar and sighed after the flight=20 home.
 
Have a great trip, Tracy.  Remember you are = driving=20 out there - much more dangerous than flying - so keep on your toes and = watch for=20 closing traffic.
 
Ed
----- Original Message -----
From:=20 Tracy = Crook
Sent: Monday, May 02, 2005 4:14 = PM
Subject: [FlyRotary] Re: Fuse = or=20 CB?

Human nature sure is entertaining : )  
 
Real world experience is what decides this sort of thing for = me. =20 Several here have related experiences where a breaker got then out of = a=20 jamb.  I could add a couple of more examples but I've given them = before=20 and it's a long story.  Can anyone give an example (no = theoretical ones=20 please) of where a fuse saved them and a breaker would not?
 
Jim's point about PROPER fuse sizing (being as good as a=20 breaker) has some validity but the crux is "proper".  = It is not=20 arguable (IMO) that mistakes are made by us humans.  We may = not=20 anticipate some situation that can cause the fuse to blow or the CB to = open.  Which one gives you a second chance? 
 
In other news,  Finally got 600 feet of dry runway (my = personal=20 minimum) and flew the RV-4 home from Lake City.  Practiced short = field=20 approaches for 30 minutes then touched down at 60 mph. =20 Didn't touch down prematurely (in the water) like = last time.=20   Hardly any brakes needed and stopped in 400 feet.  Good to = have=20 the bird home again.
 
Tracy  (departing for Colorado Wednesday)
 

>
>Here is = Bob K's=20 and his well reasoned  argument  FOR = fuses
>
><http://www.= aeroelectric.com/articles/Rev9/ch10-9.pdf"=20 = href=3D"http://www.aeroelectric.com/articles/Rev9/ch10-9.pdf>http://www.a= eroelectric.com/articles/Rev9/ch10-9.pdf">http://www.aeroelectric.com/art= icles/Rev9/ch10-9.pdf>http://www.aeroelectric.com/articles/Rev9/ch10-9= pdf
>
>

The=20 keystone of Bob's endorsement of fuses:


When the failure=20 manifests itself by opening the breaker or
fuse likelihood of = recovering=20 the system by replacing a
fuse or pushing in a breaker is very, = very=20 small.

         = Beneath it=20 all, this is what all the fuse versus circuit breaker =
discussions hinge=20 on.  It is an incorrect assumption, in my=20 experience.

         = A very=20 large percentage (but by no means all) of electrical
problems in = vehicles are intermittent in nature. You can very often reset =
the=20 breaker and restore the critical system long enough to safely land = the=20
aircraft. A fuse does not give you this option, at least not in = a timely=20
manner.




>>  Homepage:  http://www.flyrotary.com/
>&= gt; =20 Archive:   http://lancai= ronline.net/lists/flyrotary/List.html
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