X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=QoAc5h6d c=1 sm=1 tr=0 a=xuqu4LtG73bbFu04xJYfKg==:117 a=xuqu4LtG73bbFu04xJYfKg==:17 a=kj9zAlcOel0A:10 a=dapMudl6Dx4A:10 a=UKPAHat8AAAA:8 a=Ia-xEzejAAAA:8 a=eRLigfuSAAAA:8 a=7g1VtSJxAAAA:8 a=QKEI9c4zFTcuhYUA60wA:9 a=CjuIK1q_8ugA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=Fc6xXSS-RxGHxrvp76Qp:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=BfhXYjFvZD4iae-mNffo:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Bobby J. Hughes bhughes@qnsi.net" <flyrotary@lancaironline.net> Received: from [207.91.159.28] (HELO barracuda.qnsi.net) by logan.com (CommuniGate Pro SMTP 6.2.6) with ESMTP id 11509349 for flyrotary@lancaironline.net; Sun, 12 Aug 2018 10:43:31 -0400 Received-SPF: pass receiver=logan.com; client-ip=207.91.159.28; envelope-from=btv1==7626ff2428c==bhughes@qnsi.net X-ASG-Debug-ID: 1534084988-027645144c11390001-fw4j19 Received: from mail.qnsi.net ([10.0.0.5]) by barracuda.qnsi.net with ESMTP id ESCkT2tvJlcnOwAG for <flyrotary@lancaironline.net>; Sun, 12 Aug 2018 09:43:08 -0500 (CDT) X-Barracuda-Envelope-From: bhughes@qnsi.net Received: from 10.0.0.5 ([10.0.0.5]) by qnsi-mail.qnsi.net ([10.0.0.5]) with Microsoft Exchange Server HTTP-DAV ; Sun, 12 Aug 2018 14:43:08 +0000 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 (1.0) Subject: Re: [FlyRotary] Re: wiring thread-topic: [FlyRotary] Re: wiring X-ASG-Orig-Subj: Re: [FlyRotary] Re: wiring thread-index: AdQySskj/B87IaAlSaG5bM4wya9Ylw== Message-ID: <DBD8E19B-2591-4D62-82AF-78387F21E567@qnsi.net> Date: Sun, 12 Aug 2018 09:43:07 -0500 References: <list-11509176@logan.com> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> In-Reply-To: <list-11509176@logan.com> X-Barracuda-Connect: UNKNOWN[10.0.0.5] X-Barracuda-Start-Time: 1534084988 X-Barracuda-URL: http://10.0.0.4:8000/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at qnsi.net X-Barracuda-BRTS-Status: 1 X-Barracuda-Spam-Score: 1.32 X-Barracuda-Spam-Status: No, SCORE=1.32 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=1000.0 tests=MIME_QP_LONG_LINE, MIME_QP_LONG_LINE_2, WEIRD_PORT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.55535 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 WEIRD_PORT URI: Uses non-standard port number for HTTP 0.00 MIME_QP_LONG_LINE RAW: Quoted-printable line longer than 76 chars 0.82 MIME_QP_LONG_LINE_2 RAW: Quoted-printable line longer than 76 chars Need more coffee. Fuse holders are a little weak and I ended up with eight b= reakers. Sent from my iPad > On Aug 12, 2018, at 8:38 AM, Bobby J. Hughes bhughes@qnsi.net <flyrotary@l= ancaironline.net> wrote: >=20 > Andrew >=20 > I have several automotive type fuse blocks in plane for secondary items. L= ights, door alarms, relay coils etc. I notice early the fuse clamping force s= eemed a little week on some slots. I ended up with pull type breakers for EC= , coils and injectors fuel pump. Also all fuse blocks are feed from breakers= . Secondary power for EC and secondary fuel pump are also on fuses. I think= I needed up with eight breakers and three fuse blocks.=20 >=20 > Bobby >=20 > Sent from my iPad >=20 >> On Aug 11, 2018, at 8:42 PM, Andrew Martin andrew@martinag.com.au <flyrot= ary@lancaironline.net> wrote: >>=20 >>=20 >> Just found the cause of an intermittent problem I've been having. Seems o= ver the last couple of weeks I thought I had been flooding the engine on sta= rtup, Well, I had but not from what I thought. For absolute years I've never= really had any issue getting the engine to start. but then just as I'm abou= t to start flying again occasionally it would be impossible to start. turns o= ut the ignition fuse was acting like a resistor. >> Was hard to diagnose as just touching the fuse made it work so every time= I put the multimeter on it it would show as ok, and volts at the coils was o= nly ever slightly lower but obvious now at very low amps. and if by luck whe= n the engine did start it would continue to run( guess due to extra couple o= f volts from alternator) so no inflight failure, but would only have been a m= atter of time. >>=20 >> Anyway now when I should be right in my test phase, I'm back trying to fi= gure out if I need a redundant power supply for the engine. hard because of t= he type of failure and there are so many single point failures possible its k= ind of pointless trying to mitigate them all. >>=20 >> The problem area was the contact surface between fuse & fuse holder, Not s= ure if I got a dodgy fuse block or if its just the environment.=20 >> So do I duplicate the engine power bus, switches & wiring with diodes whe= re the systems join at each component( lots a work) or just put it down as a= totally random failure & just check & clean fuse panel connections as part o= f the annual inspection? >>=20 >> Andrew >>=20 >>=20 >>=20 >=20 > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List= .html