---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Mon 07/14/14: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:41 AM - Re: Battery cable (Gary L Vogt) 2. 05:21 AM - Re: Battery cable (Linn Walters) 3. 06:39 PM - Re: Battery cable (Gary) 4. 08:53 PM - Gravel runways (Gary L Vogt) ________________________________ Message 1 _____________________________________ Time: 12:41:52 AM PST US Subject: Re: TeamGrumman-List: Battery cable From: Gary L Vogt I got the wire from EDMO. It's 2AWG. It just looks like a size smaller than the original. Is this big enough for the Sky-Tec starter? I looked at the specs and the current demand for the Sky-Tec exceeds that for 2AWG. Would 1AWG wire work better? Gary Sent from my iPad > On Jul 13, 2014, at 5:44 AM, Linn Walters wrote: > > > Yep, #2 is what you want. Wire can look bigger/smaller due to the thickness of the insulation. The insulation on the wire I used for the RV-10 is real thin but it's really tough. > You should always get wire for the airplane from an aviation source ..... it has more individual strands that stands up to vibration better. > Linn > >> On 7/13/2014 2:15 AM, Gary L Vogt wrote: >> >> I just bought some 2 gauge wire for the battery and starter. Seems a little small. Definitely looks smaller than the wire I removed. >> >> Is 2 gauge the right size? >> >> Gary >> Sent from my iPad >> >> >> >> >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com > > > > > ________________________________ Message 2 _____________________________________ Time: 05:21:18 AM PST US From: Linn Walters Subject: Re: TeamGrumman-List: Battery cable On 7/14/2014 3:41 AM, Gary L Vogt wrote: > > I got the wire from EDMO. It's 2AWG. It just looks like a size smaller than the original. > > Is this big enough for the Sky-Tec starter? Yes. > I looked at the specs and the current demand for the Sky-Tec exceeds that for 2AWG. Color me skeptical. It would help if you posted where you got the info on the wires. 2 ga. MIL-W-22759/16 is what you want. I think your confusion comes from comparing the current needs of the starter with the current capabilities of the wire as listed in a table. Wire size/current is rated for temperature rise in free air and bundled ..... and you just can't crank that starter long enough to get that amount of temperature rise. > Would 1AWG wire work better? In some ways. There would be less voltage drop during starting so that is better. It's also heavier (naturally) so that is not better. 2 ga. weighs 200.9 pounds/1000' and 1 ga. weighs 253.5 pounds/1000'. Not a great weight penalty, but why carry excess weight anyway??? It's a cost (in weight and money) Vs. benefit (a little better cranking speed) that's not necessary. Put the 2 ga. in and don't fret. The other concern is the type of lug ..... a solid or welded barrel is the only one to use, not the ones with an open seam ..... and the type of crimper. I used a T&B crimper on my RV-10 heavy wires ...... because my EAA chapter has one in it's tool crib. The color coded T&B lugs are out of my price range though!!!! You need to compress the wire in the lug until it's as close to a solid wire as you can get. This makes an air-tight connection and cuts down on corrosion. Linn > > Gary > Sent from my iPad > >> On Jul 13, 2014, at 5:44 AM, Linn Walters wrote: >> >> >> Yep, #2 is what you want. Wire can look bigger/smaller due to the thickness of the insulation. The insulation on the wire I used for the RV-10 is real thin but it's really tough. >> You should always get wire for the airplane from an aviation source ..... it has more individual strands that stands up to vibration better. >> Linn >> >>> On 7/13/2014 2:15 AM, Gary L Vogt wrote: >>> >>> I just bought some 2 gauge wire for the battery and starter. Seems a little small. Definitely looks smaller than the wire I removed. >>> >>> Is 2 gauge the right size? >>> >>> Gary >>> Sent from my iPad >>> >>> >>> >>> >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >> >> >> >> > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > > ________________________________ Message 3 _____________________________________ Time: 06:39:07 PM PST US Subject: Re: TeamGrumman-List: Battery cable From: Gary Thanks Linn. I did a Google search and came up with a bunch of different results. Most showed 2AWG being barely adequate. We're only talking 4 feet or so. I will use the 2 since I already have it. Thanks again. Gary AuCountry Aviation Auburn, CA. Sent from my iPhone > On Jul 14, 2014, at 5:20 AM, Linn Walters wrote: > > >> On 7/14/2014 3:41 AM, Gary L Vogt wrote: >> >> I got the wire from EDMO. It's 2AWG. It just looks like a size smaller than the original. >> >> Is this big enough for the Sky-Tec starter? > Yes. >> I looked at the specs and the current demand for the Sky-Tec exceeds that for 2AWG. > Color me skeptical. It would help if you posted where you got the info on the wires. 2 ga. MIL-W-22759/16 is what you want. > I think your confusion comes from comparing the current needs of the starter with the current capabilities of the wire as listed in a table. Wire size/current is rated for temperature rise in free air and bundled ..... and you just can't crank that starter long enough to get that amount of temperature rise. >> Would 1AWG wire work better? > In some ways. There would be less voltage drop during starting so that is better. > It's also heavier (naturally) so that is not better. 2 ga. weighs 200.9 pounds/1000' and 1 ga. weighs 253.5 pounds/1000'. Not a great weight penalty, but why carry excess weight anyway??? It's a cost (in weight and money) Vs. benefit (a little better cranking speed) that's not necessary. > > Put the 2 ga. in and don't fret. > > The other concern is the type of lug ..... a solid or welded barrel is the only one to use, not the ones with an open seam ..... and the type of crimper. I used a T&B crimper on my RV-10 heavy wires ...... because my EAA chapter has one in it's tool crib. The color coded T&B lugs are out of my price range though!!!! You need to compress the wire in the lug until it's as close to a solid wire as you can get. This makes an air-tight connection and cuts down on corrosion. > Linn >> >> Gary >> Sent from my iPad >> >>> On Jul 13, 2014, at 5:44 AM, Linn Walters wrote: >>> >>> >>> Yep, #2 is what you want. Wire can look bigger/smaller due to the thickness of the insulation. The insulation on the wire I used for the RV-10 is real thin but it's really tough. >>> You should always get wire for the airplane from an aviation source ..... it has more individual strands that stands up to vibration better. >>> Linn >>> >>>> On 7/13/2014 2:15 AM, Gary L Vogt wrote: >>>> >>>> I just bought some 2 gauge wire for the battery and starter. Seems a little small. Definitely looks smaller than the wire I removed. >>>> >>>> Is 2 gauge the right size? >>>> >>>> Gary >>>> Sent from my iPad >>>> >>>> >>>> >>>> >>>> >>>> >>>> ----- >>>> No virus found in this message. >>>> Checked by AVG - www.avg.com >> >> >> >> >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com > > > > > ________________________________ Message 4 _____________________________________ Time: 08:53:20 PM PST US From: Gary L Vogt Subject: TeamGrumman-List: Gravel runways Twice in two days two separate customers (Both have multiple partners ownin g the plane) have called to tell me one of their partners has landed on gra vel runways. -Both sustained significant damage to the horizontal. -One will likely need to be reskinned. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.