X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.52.245.18] (HELO ispwestemail2.mdeinc.com) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 932959 for flyrotary@lancaironline.net; Wed, 04 May 2005 20:52:32 -0400 Received-SPF: none receiver=logan.com; client-ip=216.52.245.18; envelope-from=wschertz@ispwest.com Received: from 7n7z201 (unverified [63.13.186.38]) by ispwestemail2.mdeinc.com (Vircom SMTPRS 4.1.361.0) with SMTP id for ; Wed, 4 May 2005 17:51:31 -0700 Message-ID: <00a901c5510c$95b917c0$6401a8c0@7n7z201> From: "William" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Circuit breaker article( redundancy power) Date: Wed, 4 May 2005 19:51:33 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A6_01C550E2.AC7818F0" 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 This is a multi-part message in MIME format. ------=_NextPart_000_00A6_01C550E2.AC7818F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable They had a single point of failure built in with all hydraulic lines = going past the tail engine where they could be severed.=20 Poor redundancy. Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: Jim Sower=20 To: Rotary motors in aircraft=20 Sent: Wednesday, May 04, 2005 7:14 PM Subject: [FlyRotary] Re: Circuit breaker article( redundancy power) <... You do not have to have more than one level of redundancy to = basically eliminate any chance of total failure of the system with = failures in the 1000 hour range ...> You might want to talk to the crew of that 757 or L1011 or whatever it = was that crashed in Souix City(?) a few years back because it lost ONE = of THREE engines and immediately went ballistic. The devil made me say that :o) ... Jim S. WALTER B KERR wrote:=20 Ian=20 I would think that in the case of airliners they have so many = redundant systems that if one goes down they have two or three others to = continue with, so there is no emergency situation in there case. Georges = -------------------------------------------------------------------------= You do not have to have more than one level of redundancy to = basically eliminate any chance of total failure of the system with = failures in the 1000 hour range such as fuses as long as the pilot has = time to try the backup system? I will take reduncancy ever day of the = week compared to a single CB circuit albeit it I have parallel master = switch circuit breaker's but I do not intend to reset one as long as the = other is working :>) I know we are not changing anyone's veiws on CB vs fuses, but = it has been an interesting dialogue. Bernie =20 >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_00A6_01C550E2.AC7818F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
They had a single point of failure = built in with=20 all hydraulic lines going past the tail engine where they could be = severed.=20
 
Poor redundancy.
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From:=20 Jim=20 Sower
Sent: Wednesday, May 04, 2005 = 7:14=20 PM
Subject: [FlyRotary] Re: = Circuit breaker=20 article( redundancy power)

<... You do not have to have = more than=20 one level of redundancy to basically eliminate any chance of total = failure of=20 the system with failures in the 1000 hour range ...>
You might = want to=20 talk to the crew of that 757 or L1011 or whatever it was that crashed = in Souix=20 City(?) a few years back because it lost ONE of THREE engines and = immediately=20 went ballistic.

The devil made me say that :o) ... Jim=20 S.


WALTER B KERR wrote:=20
 Ian
I would think that in the case of airliners they have so = many=20 redundant systems that if one goes down they have two or = three=20 others to continue with, so there is no emergency situation in = there=20 case.
Georges
=
--------------------------------------------------------------------= -----
 
You do not have to have more than one level of redundancy = to=20 basically eliminate any chance of total failure of the system = with=20 failures in the 1000 hour range such as fuses as long as = the=20 pilot has time to try the backup system? I will take = reduncancy ever=20 day of the week compared to a single CB circuit albeit it I = have=20 parallel master switch circuit breaker's but I do not intend = to reset=20 one as long as the other is working :>)
 
I know we are not changing anyone's veiws on CB vs fuses, = but it=20 has been an interesting dialogue.
 
Bernie
 

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