X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao02.cox.net ([68.230.241.37] verified) by logan.com (CommuniGate Pro SMTP 5.1.0) with ESMTP id 1491802 for flyrotary@lancaironline.net; Sat, 21 Oct 2006 20:00:18 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.37; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao02.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20061021235956.CPTN12581.fed1rmmtao02.cox.net@fed1rmimpo02.cox.net> for ; Sat, 21 Oct 2006 19:59:56 -0400 Received: from BigAl ([72.192.132.90]) by fed1rmimpo02.cox.net with bizsmtp id dC001V00S1xAn3c0000000 Sat, 21 Oct 2006 20:00:00 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Fuse Ratings for Wiring?? Date: Sat, 21 Oct 2006 17:00:09 -0700 Message-ID: <003401c6f56d$09f242f0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0035_01C6F532.5D936AF0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0035_01C6F532.5D936AF0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I have a fuse box right next to the alternator and the coil power comes right off that and travels about 4 inches to the coils. Minimizes the length of run of those noisy wires and they never leave the FF area.=20 =20 Definitely good from noise perspective; but how about disable capability = for verifying coil operation? =20 Al =20 Dave Leonard =20 On 10/21/06, Ed Anderson wrote:=20 While I agree (and indeed use my CB in much the same manner - = particularly when trouble shooting), it still seem strange that the manufacture of = those=20 type aircraft would spend considerable costs to use 10's of dozens of circuit breakers in each aircraft (and perhaps hundreds of aircraft manufactured) where a much cheaper/lighter fuse would do the job (just = pull=20 the fuse for maintenance). But, again this is an area where each can = choose the approach which makes them feel more comfortable. I certainly agree that a fuse of CB can do its fundamental purpose of protecting a wire from cooking - so functionally its a wash, cost and=20 complexity do vary between the two approaches. But, I think this again brings it back to what makes you feel comfortable when flying behind = your rotary engine. Going out to fly this wonderful morning Ed ----- Original Message ----- From: "David Staten" To: "Rotary motors in aircraft" < flyrotary@lancaironline.net > Sent: Saturday, October 21, 2006 12:49 AM Subject: [FlyRotary] Re: Fuse Ratings for Wiring?? > Ed Anderson wrote: > >> I can not help but wonder why these type of high value aircraft use=20 >> circuit breakers rather than fuses. Circuit breakers are in essence = no >> more than a mechanical switch (we all use those I believe) activated = by >> heat rather than a finger. But, this debate could (has and will)=20 >> continue into the future, for sure. > > > For the planes that have a gajillion and one circuits, the breakers = can > serve as a switch for maintenance or troubleshooting of a portion of a = > component system. The switch on the panel may turn the whole system ON = or > OFF.. an individual actuator or motor may have its own breaker.. for > example.. > > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ > -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/=20 --=20 David Leonard Turbo Rotary RV-6 N4VY My websites at: http://members.aol.com/_ht_a/rotaryroster/index.html=20 http://members.aol.com/_ht_a/vp4skydoc/index.html http://leonardiniraq.blogspot.com=20 ------=_NextPart_000_0035_01C6F532.5D936AF0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 I have a fuse box right next to the = alternator and the coil power comes right off that and travels about 4 inches to the coils.  Minimizes the length of run of those noisy wires and they = never leave the FF area.

 

Definitely good from noise = perspective; but how about disable capability for verifying coil = operation?

 

Al

 

Dave Leonard

 

On = 10/21/06, Ed Anderson <eanderson@carolina.rr.com&g= t; wrote:

While I agree (and indeed use my CB in much = the same manner - particularly
when trouble shooting), it still seem strange that the manufacture of = those
type aircraft would spend considerable costs to use 10's of dozens = of
circuit breakers  in each aircraft (and perhaps hundreds of = aircraft
manufactured) where a much cheaper/lighter fuse would do the job (just = pull
the fuse for maintenance).  But, again this is an area where = each can choose
the approach which makes them feel more comfortable.

I certainly agree that a fuse of CB can do its fundamental purpose = of
protecting a wire from cooking - so functionally its a wash, cost and =
complexity do vary between the two approaches.  But, I think = this again
brings it back to what makes you feel comfortable when flying behind = your
rotary engine.

Going out to fly this wonderful morning

Ed
----- Original Message -----
From: "David Staten" <Dastaten@earthlink.net>
= To: "Rotary motors in aircraft" < = flyrotary@lancaironline.net>
Sent: Saturday, October 21, 2006 12:49 AM
Subject: [FlyRotary] Re: Fuse Ratings for Wiring??


> Ed Anderson wrote:
>
>>  I can not help but wonder why these type of high = value aircraft use
>> circuit breakers rather than fuses.   Circuit = breakers are in essence  no
>> more than a mechanical switch  (we all use those I = believe) activated by
>> heat rather than a finger.  But, this debate could = (has and will)
>> continue into the future, for sure.
>
>
> For the planes that have a gajillion and one circuits, the breakers = can
> serve as a switch for maintenance or troubleshooting of a portion = of a
> component system. The switch on the panel may turn the whole system = ON or
> OFF.. an individual actuator or motor may have its own breaker.. = for
> example..
>
>
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/
>



--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lanca= ironline.net/lists/flyrotary/




--
David Leonard

Turbo Rotary RV-6 N4VY
My websites at:
http://memb= ers.aol.com/_ht_a/rotaryroster/index.html
http://members= .aol.com/_ht_a/vp4skydoc/index.html
http://leonardiniraq.blogspot.= com

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