X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Received: from ms-smtp-03.southeast.rr.com ([24.25.9.102] verified) by logan.com (CommuniGate Pro SMTP 5.1.6) with ESMTP id 1836209 for flyrotary@lancaironline.net; Tue, 13 Feb 2007 20:49:55 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with SMTP id l1E1mpOj018642 for ; Tue, 13 Feb 2007 20:48:51 -0500 (EST) Message-ID: <000b01c74fda$05293540$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Second engine start Date: Tue, 13 Feb 2007 20:47:00 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit 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 X-Virus-Scanned: Symantec AntiVirus Scan Engine I always get a bit nervous when the bean counters get final say on the safety and engineering decisions {:>). However, my question is - were there any circuit breakers present? - I certainly think there is a place for fuses and I used them - just not in flight critical systems. Ed ----- Original Message ----- From: "Thomas y Reina Jakits" To: "Rotary motors in aircraft" Sent: Tuesday, February 13, 2007 7:29 PM Subject: [FlyRotary] Re: Second engine start > Just finished a Factory Transition Course (Theory and Flight) for the > Eurocopter AS350B3 helicopter. > That thing has a LOT of fuses in the panels. Asking the instructor why > fuses and not CB's, he said: "Fuses are cheaper!" > And that in a helicopter that cost around $2.2M ........ > > Thomas J. > > > ----- Original Message ----- > From: "Ed Anderson" > To: "Rotary motors in aircraft" > Sent: Tuesday, February 13, 2007 10:17 AM > Subject: [FlyRotary] Re: Second engine start > > >> Glad to hear, you got it "almost" purring, Bill. >> >> I'm beating an old drum here, but would feel remiss if I didn't beat it >> one more time. I would not ever use fuses for any installation critical >> system such as fuel or ignition. Can use them for anything else (and I >> do use fuses). The reason is exactly what you discovered - a blown >> fuse - cause by ( at the moment )an unknown - but apparently transitory >> problem (since it is not continuing to blow). That's the key >> (transitory) - if a transitory fault happens and the fuse blows on a >> engine critical system - you are out of luck unless already on the ground >> while a resetting of a CB may regain function. While its true a CB >> reset may not save you (if the fault is persistent) - but then again it >> may. >> >> In my 2000+ hours of flying in military aircraft, I have had CB pop and >> regained the system by simply resetting the CB. Certainly does not work >> when a persistent problem exists - but, it can save your bacon if the >> problem is transitory. >> >> There, my 0.02 and I feel better.{:>) >> >> Ed >> >> >> >> ----- Original Message ----- >> From: "Bill Bradburry" >> To: "Rotary motors in aircraft" >> Sent: Tuesday, February 13, 2007 8:55 AM >> Subject: [FlyRotary] Second engine start >> >> >>> OK, so after having discovered a loose engine to battery ground (which >>> prevented the starter from properly engaging) and an open oil line >>> (which made a mess! that will long live in infamy) our hero continues >>> his engine start saga.... >>> >>> The engine would not seem to fire after these incidents and my friend, >>> Simon Ramirez, said he didn't think the plugs were firing. We put a >>> timing light on the plugs and sure enough, no spark! >>> >>> We discovered that the 10A fuse on the ignition circuit providing power >>> to the igniters had blown. After replacing the fuse, we were getting >>> flashes on the timing light! I am concerned about why the fuse might >>> have blown, but so far, it is holding up. >>> >>> Now the engine starts, but only seems to want to run at high revs. It >>> also seems to run better when cold start is on. I have not figured out >>> if this is just because the engine is cold, or if the condition is >>> chronic. The temp outside at the time was in the low 70s. >>> >>> Bob, hangar next door, told me that on occasion, there was flame coming >>> out of the exhaust! Also people started showing up from all over the >>> airport....That 3" straight out exhaust note is a tad harsh! especially >>> when the engine only wants to run at high revs! >>> >>> I am ready to entertain suggestions about getting the engine to settle >>> down and do the Hummm and Purrr that I hear so many of you talking >>> about. Right now it is more like ripping down a tin building with 15 >>> chainsaws...{:>) >>> >>> I am already proud of it!! >>> >>> Bill B >>> >>> -- >>> 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/ >> > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/