---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 01/26/18: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:12 AM - Starter Contactor location on a Long-EZ (Airdog77) 2. 02:52 PM - Re: Starter Contactor location on a Long-EZ (Robert L. Nuckolls, III) 3. 03:09 PM - Re: Starter Contactor location on a Long-EZ (Airdog77) 4. 04:45 PM - =?utf-8?B?VGhlIHdvcmxkJ3MgdHJhdmVsIHNlYXJjaCBlbmdpbmUgU2t5c2Nhbm5lciBjb21wYXJlcyBtaWxsaW9ucyBvZiBmbGlnaHRzIHRvIGZpbmQgeW91IHRoZSBjaGVhcGVzdCBkZWFsLCBmYXN0Lg==? (Parent Lefebvre) 5. 04:57 PM - Re: Re: Starter Contactor location on a Long-EZ (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 10:12:52 AM PST US Subject: AeroElectric-List: Starter Contactor location on a Long-EZ From: "Airdog77" Bob, et al. BACKGROUND: I was doing some research on Brian DeFord's Cozy that burned up on the ramp some years back due to an electrical issue with the starting/charging system (i.e. electrical wires through the firewall). That led me to some info where a number of canard builders are mounting their STARTER contactors on the cold/forward side of the fireall (again, these are pushers). After assessing it, I like the idea of not having my big power cable --coming from the BATTERY contactor up front-- traversing the firewall. The net result of moving the starter contactor to the cold/forward side of the firewall would be that only 2 wires/cables (6 AWG starter wire & 18 AWG ALT B lead) would then require traversing the firewall versus 5 wire/cables if I leave the starter contactor on the hot/aft side of the firewall... the big bubba cable from the battery contactor of course being one of those 5 traversing wires/cables. The physical location change would require about 1-2" longer runs for the starter cable and B-lead wire, which to me seems minimal and non-issue. I do however want to ask for a crosscheck on this plan to ensure I'm not missing any possible critical issue(s). Thanks, Wade -------- Airdog Wade Parton Building Long-EZ N916WP www.longezpush.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477604#477604 ________________________________ Message 2 _____________________________________ Time: 02:52:41 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Starter Contactor location on a Long-EZ At 12:12 PM 1/26/2018, you wrote: > >Bob, et al. > >BACKGROUND: I was doing some research on Brian DeFord's Cozy that >burned up on the ramp some years back due to an electrical issue >with the starting/charging system (i.e. electrical wires through the >firewall). That led me to some info where a number of canard >builders are mounting their STARTER contactors on the cold/forward >side of the fireall (again, these are pushers). > >After assessing it, I like the idea of not having my big power cable >--coming from the BATTERY contactor up front-- traversing the >firewall. The net result of moving the starter contactor to the >cold/forward side of the firewall would be that only 2 wires/cables >(6 AWG starter wire & 18 AWG ALT B lead) would then require >traversing the firewall versus 5 wire/cables if I leave the starter >contactor on the hot/aft side of the firewall... the big bubba cable >from the battery contactor of course being one of those 5 traversing >wires/cables. > >The physical location change would require about 1-2" longer runs >for the starter cable and B-lead wire, which to me seems minimal and >non-issue. I do however want to ask for a crosscheck on this plan >to ensure I'm not missing any possible critical issue(s). > The battery side of the starter contactor is the power node for starter, alternator b-lead, and any other hi-current accessory that might find its way under the cowl . . . so in any case, there is potential for always hot wires to cross the firewall irrespective of contactor location. The more fundamental questions would investigate techniques for bringing any power/fluid/control line through the firewall. There's over a century of lessons-learned and documented design practices that should have kept this conversation from happening in the first place. If it were my airplane, the contactor would be on the engine side of the firewall. Bob . . . ________________________________ Message 3 _____________________________________ Time: 03:09:02 PM PST US Subject: AeroElectric-List: Re: Starter Contactor location on a Long-EZ From: "Airdog77" Bob, Roger... I'll go back and take a deeper look at all this. Thanks! Wade -------- Airdog Wade Parton Building Long-EZ N916WP www.longezpush.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=477611#477611 ________________________________ Message 4 _____________________________________ Time: 04:45:30 PM PST US From: "Parent Lefebvre" Subject: AeroElectric-List: =?utf-8?B?VGhlIHdvcmxkJ3MgdHJhdmVsIHNlYXJjaCBlbmdpbmUgU2t5c2Nhbm5lciBjb21wYXJlcyBtaWxsaW9ucyBvZiBmbGlnaHRzIHRvIGZpbmQgeW91IHRoZSBjaGVhcGVzdCBkZWFsLCBmYXN0Lg==? Whether you want to go to Tenerife or Tokyo, we'll find low cost f lights to get you there. We also find the cheapest hotels and car hire deals.
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