X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc13.worldnet.att.net ([204.127.131.117] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 930504 for flyrotary@lancaironline.net; Mon, 02 May 2005 18:20:23 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.117; envelope-from=keltro@att.net Received: from 204.127.135.42 ([204.127.135.42]) by worldnet.att.net (mtiwmhc13) with SMTP id <20050502222006113002mjlfe>; Mon, 2 May 2005 22:20:11 +0000 Received: from [209.247.222.114] by 204.127.135.42; Mon, 02 May 2005 22:20:05 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: Fuse or CB?and Trip Date: Mon, 02 May 2005 22:20:05 +0000 Message-Id: <050220052220.26139.4276A794000677650000661B2160281302019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 14 2005) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_26139_1115072405_0" --NextPart_Webmail_9m3u9jl4l_26139_1115072405_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Tracy, Any chance you will be passing through Okla City on I-40 and if so any idea when ?? Some folks here would like to see you and Laura if if is convenient for you !! -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 -------------- Original message from "Tracy Crook" : -------------- Human nature sure is entertaining : ) 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? 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.aeroelectric.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 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 the breaker and restore the critical system long enough to safely land the aircraft. A fuse does not give you this option, at least not in a timely manner. >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html --NextPart_Webmail_9m3u9jl4l_26139_1115072405_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Tracy,

Any chance you will be passing through Okla City on I-40 and if so

any idea when ?? Some folks here would like to see you and Laura if

if is convenient for you !!

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from "Tracy Crook" <lors01@msn.com>: --------------

Human nature sure is entertaining : )

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?

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.aeroelectric.com/articles/Rev9/ch10-9.pdf>http://www.aeroelectric.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
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
the breaker and restore the critical system long enough to safely land the
aircraft. A fuse does not give you this option, at least not in a timely
manner.

>> Homepage: http://www.flyrotary.com/
>> Archive:   http://lancaironline.net/lists/flyrotary/List.html

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