---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 08/29/18: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:29 AM - Re: DPDT Toggle switch for BAT and 2 Alternators? (user9253) 2. 08:12 AM - Tube and fabric com ground plane (Tom Chapman) 3. 08:55 AM - Re: Tube and fabric com ground plane (user9253) 4. 10:04 AM - Re: Re: DPDT Toggle switch for BAT and 2 Alternators? (don van santen) 5. 04:03 PM - Re: DPDT Toggle switch for BAT and 2 Alternators? (user9253) 6. 05:10 PM - Re: Re: DPDT Toggle switch for BAT and 2 Alternators? (don van santen) ________________________________ Message 1 _____________________________________ Time: 04:29:51 AM PST US Subject: AeroElectric-List: Re: DPDT Toggle switch for BAT and 2 Alternators? From: "user9253" In any circuit it is OK to use a smaller fuse than specified as long as it doesn't nuisance blow. Same is true for a fuselink as long as it doesn't get too hot or drop too much voltage. It should be OK to use a 14AWG fuselink. But why not use 16AWG? You could also use the ANL 40 instead of a fuselink. The purpose of a fuse or fuselink is not to protect the alternator, but to protect the battery and wires. An alternator does not need to be protected because it is self current limiting. It can not put out more current than it is capable of. The connected load determines the current. An alternator will only put out what the load demands. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=482765#482765 ________________________________ Message 2 _____________________________________ Time: 08:12:56 AM PST US From: Tom Chapman Subject: AeroElectric-List: Tube and fabric com ground plane I am installing RAMI comm antenna on my tube and fabric high wing experimental. I've read up on creating a ground plane using adhesive copper strips. I plan to do a starburst pattern. Several of the copper strips will need to go over some of the fuselage tubing before continuing on being adhered to the fabric. Will it be helpful to use the steel tubing as part of the ground plane? I could sand off the paint coating on the tubes where the copper strips pass over them if this would help with the ground plane. (the adhesive used on the copper strips is supposed to be conductive) Thoughts? Thanks! Tom ________________________________ Message 3 _____________________________________ Time: 08:55:51 AM PST US Subject: AeroElectric-List: Re: Tube and fabric com ground plane From: "user9253" The steel fuselage tubing can be used for a ground plane if the antenna is located at a junction of 3 or more tubes. Gluing copper strips to steel tubing is unlikely to do any good. Adhesive is not usually conductive. Don't count on it. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=482773#482773 ________________________________ Message 4 _____________________________________ Time: 10:04:22 AM PST US From: don van santen Subject: Re: AeroElectric-List: Re: DPDT Toggle switch for BAT and 2 Alternators? Thanks Joe, I used to know that. I got fooled by the warning in the B&C manual that says the standby alternator must be kept below 30 amps to avoid damage. It is a 40 amp alternator de-rated to 30A. On Wed, Aug 29, 2018, 04:34 user9253 wrote: > > In any circuit it is OK to use a smaller fuse than specified as long as it > doesn't nuisance blow. Same is true for a fuselink as long as it doesn't > get too hot or drop too much voltage. It should be OK to use a 14AWG > fuselink. But why not use 16AWG? You could also use the ANL 40 instead of > a fuselink. The purpose of a fuse or fuselink is not to protect the > alternator, but to protect the battery and wires. An alternator does not > need to be protected because it is self current limiting. It can not put > out more current than it is capable of. The connected load determines the > current. An alternator will only put out what the load demands. > > -------- > Joe Gores > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=482765#482765 > > ________________________________ Message 5 _____________________________________ Time: 04:03:27 PM PST US Subject: AeroElectric-List: Re: DPDT Toggle switch for BAT and 2 Alternators? From: "user9253" The danger to alternators is over heating when heavily loaded. A blast tube can help. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=482783#482783 ________________________________ Message 6 _____________________________________ Time: 05:10:46 PM PST US From: don van santen Subject: Re: AeroElectric-List: Re: DPDT Toggle switch for BAT and 2 Alternators? Thanks. My load analysis has me below 20a at night vfr and also ifr. After some hot starts especially those that take longer than usual I have seen as high as 45a on my primary alt. Have flown this way for over 2 yrs. Do not see any real issues. Was just wondering why Bob picked 16awg instead of 14 on z12. On Aug 29, 2018 16:09, "user9253" wrote: The danger to alternators is over heating when heavily loaded. A blast tube can help. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=482783#482783 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-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/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-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.