---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 02/07/16: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:24 AM - Magneto Toggle Switches (ameyer) 2. 08:52 AM - Re: Magneto Toggle Switches (John B) 3. 09:17 AM - Re: Magneto Toggle Switches (John Tipton) 4. 01:43 PM - Re: New EarthX battery (Ralph E. Capen) ________________________________ Message 1 _____________________________________ Time: 08:24:39 AM PST US Subject: AeroElectric-List: Magneto Toggle Switches From: ameyer QW5vdGhlciByZWFzb24gbm90IHRvIGRvIHRoaXMgaXMgdGhlIGR5bmFtaWNzIG9mIHN0YXJ0aW5n Li4uIEkgdGVuZCB0byByZWxlYXNlIHRoZSBzdGFydGVyIGJlZm9yZSB0aGUgZW5naW5lIHJlYWNo ZXMgaWRsZS4gwqBZb3UgZG9uJ3Qgd2FudCB0byBiZSBmaXJpbmcgdGhlIG5vbiBpbXB1bHNlIG1h ZyBhdCBycG1zIGJlbG93IGlkbGUuIChhZnRlciB5b3UgcmVsZWFzZSB0aGUgc3RhcnRlcinCoEFs c28sIMKgb24gYSBmYWlsZWQgc3RhcnQsIMKgaWYgdGhlIG5vbiBpbXB1bHNlIG1hZyBjYXRjaGVz IHdoaWxlIHRoZSBwcm9wIGlzIHN0aWxsIHR1cm5pbmcsIMKgeW91IGZpcmUgYmVmb3JlIFREQyBh bmQgd2lsbCBoYXZlIGEga2ljayBiYWNrLiDCoFdhaXQgdW50aWwgaWRsZSBiZWZvcmUgeW91IHR1 cm4gb24geW91ciBub24gaW1wdWxzZSBtYWcuIMKgV2l0aCB0aGUgcHVzaCBrZXkgdHlwZXMsIMKg eW91IGhhdmUgYSBzbWFsbCBkZWxheSwgwqB3aGVyZSBhcyB3aXRoIHRoZXNlIHN3aXRjaGVzLCDC oGl0J2xsIGJlIGFsbW9zdCBpbnN0YW50LiDCoEkndmUgZ290IHR3byBzd2l0Y2hlcyBhbmQgYSBw dXNoIGJ1dHRvbiB0byBzdGFydC4gwqBQdXQgYSBzYWZldHkgb3ZlciB0aGUgc3RhcnRlciBzd2l0 Y2guIMKgSXQnbGwgYmUgYWJvdXQgYXMgc2FmZSBhcyB0ZWxsaW5nIHNvIG9uZSBub3QgdG8gcHVz aCB0d28gc3dpdGNoZXMgaW4gdGhlIHNhbWUgZGlyZWN0aW9uIGF0IHRoZSBzYW1lIHRpbWUuIMKg T3IsIMKgcmV2ZXJzZSB0aGUgd2lyaW5nIG9uIHRoZSBub24gaW1wdWxzZSBtYWcgc3dpdGNoLi4u IMKgRG93biB0byBjcmFuaywgwqBtaWRkbGUgaXMgbWFnIGdyb3VuZGVkLCDCoGFuZCB1cCBpcyBt YWcgaG90LiBUaGVuLCB0d2lzdCB0aGUgc3dpdGNoZXMgKGxlZnQgdXAsIMKgcmlnaHQgZG93bikg wqB0byBzdGFydCwgwqB0aGVuIHJhaXNlIHRoZSByaWdodCBtYWcgdG8gdHVybiBpdCBvbi4gwqAK SGFwcHkgRmx5aW4nIcKgCkFuZHkKCgoKClRpbWU6IDA3OjQ3OjQ1IEFNIFBTVCBVUwpTdWJqZWN0 OiBBZXJvRWxlY3RyaWMtTGlzdDogTWFnbmV0byBUb2dnbGUgU3dpdGNoZXMKRnJvbTogUGF1bCBN aWxsbmVyIDxtaWxsbmVyQG1lLmNvbT4KCgoKT24gMi81LzIwMTYgNDo0NyBQTSwgdXNlcjkyNTMg d3JvdGU6Cj4gSWYgSSB3YXMgdG8gdXNlIDIgdG9nZ2xlIHN3aXRjaGVzIChsZWZ0IG1hZyBzd2l0 Y2ggd291bGQgaGF2ZSBtb21lbnRhcnkgcG9zaXRpb24KZm9yIHN0YXJ0ZXIpIGZvciBteSBtYWdu ZXRvcywgaG93IGNvdWxkIEkgd2lyZSBpdCBzbyB0aGF0IGl0IHdvdWxkIG9wZXJhdGUKbGlrZSBh IGtleWVkIGlnbml0aW9uIHN3aXRjaCwgaS5lLiwgc2h1dCB0aGUgcmlnaHQgbWFnIGRvd24gZHVy aW5nIHN0YXJ0LCBidXQKYXV0b21hdGljYWxseSBjb21lIG9ubGluZSBhZnRlciBJIHJlbGVhc2Ug dGhlIHN0YXJ0ZXI/CgpTZWVtcyBsaWtlIHlvdSdkIHdhbnQgdGhlIHN0YXJ0ZXIgb24gdGhlIFJJ R0hUIG1hZyB0b2dnbGUgc3dpdGNoLi4uIGFuZCAKaW4gdGhlICJzdGFydCIgcG9zaXRpb24gaXQg Z3JvdW5kcyB0aGUgcmlnaHQgbWFnIFAtbGVhZC4KClBhdWwKCgoKUmVhZCB0aGlzIHRvcGljIG9u bGluZSBoZXJlOgoKaHR0cDovL2ZvcnVtcy5tYXRyb25pY3MuY29tL3ZpZXd0b3BpYy5waHA/cD00 NTI2NDYjNDUyNjQ2CgoK ________________________________ Message 2 _____________________________________ Time: 08:52:47 AM PST US From: John B Subject: Re: AeroElectric-List: Magneto Toggle Switches Make this easy! Use one switch for the non-impulse mag. After start, turn the non-impulse mag on. If you really need to conserve the panel space, use a momentary on toggle for the left mag/start. Off-On-Start. The key switches have been known to ground out, and they are complex to wire. They are look goofy. The airplane industry was attempting to emulate the auto industry... To check your mags, turn off, (actually ground,) the mag you are not checking. This the simplest way! Cost effective! Actually, one switch for each mag and a separate starter button is the way to go. Simple to wire. Individual components are cheap and easy to replace if they ever fail. On Sun, Feb 7, 2016 at 8:49 AM, ameyer wrote: > Another reason not to do this is the dynamics of starting... I tend to > release the starter before the engine reaches idle. You don't want to be > firing the non impulse mag at rpms below idle. (after you release the > starter) > Also, on a failed start, if the non impulse mag catches while the prop > is still turning, you fire before TDC and will have a kick back. > Wait until idle before you turn on your non impulse mag. With the push > key types, you have a small delay, where as with these switches, it'll > be almost instant. I've got two switches and a push button to start. Put > a safety over the starter switch. It'll be about as safe as telling so one > not to push two switches in the same direction at the same time. Or, > reverse the wiring on the non impulse mag switch... Down to crank, > middle is mag grounded, and up is mag hot. Then, twist the switches (left > up, right down) to start, then raise the right mag to turn it on. > > Happy Flyin'! > > Andy > > > Time: 07:47:45 AM PST US > Subject: AeroElectric-List: Magneto Toggle Switches > From: Paul Millner > > > On 2/5/2016 4:47 PM, user9253 wrote: > > If I was to use 2 toggle switches (left mag switch would have momentary > position > for starter) for my magnetos, how could I wire it so that it would operate > like a keyed ignition switch, i.e., shut the right mag down during start, > but > automatically come online after I release the starter? > > Seems like you'd want the starter on the RIGHT mag toggle switch... and > in the "start" position it grounds the right mag P-lead. > > Paul > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=452646#452646 > > ________________________________ Message 3 _____________________________________ Time: 09:17:51 AM PST US Subject: Re: AeroElectric-List: Magneto Toggle Switches From: John Tipton Wow --- Sent from my iPad ----x--O--x---- > On 7 Feb 2016, at 03:49 pm, ameyer wrote: > > Another reason not to do this is the dynamics of starting... I tend to rel ease the starter before the engine reaches idle. You don't want to be firin g the non impulse mag at rpms below idle. (after you release the starter) > Also, on a failed start, if the non impulse mag catches while the prop i s still turning, you fire before TDC and will have a kick back. > Wait until idle before you turn on your non impulse mag. With the push ke y types, you have a small delay, where as with these switches, it'll be a lmost instant. I've got two switches and a push button to start. Put a saf ety over the starter switch. It'll be about as safe as telling so one not t o push two switches in the same direction at the same time. Or, reverse th e wiring on the non impulse mag switch... Down to crank, middle is mag gro unded, and up is mag hot. Then, twist the switches (left up, right down) t o start, then raise the right mag to turn it on. > > Happy Flyin'! > > Andy > > > > > > Time: 07:47:45 AM PST US > Subject: AeroElectric-List: Magneto Toggle Switches > From: Paul Millner > > > > On 2/5/2016 4:47 PM, user9253 wrote: > > If I was to use 2 toggle switches (left mag switch would have momentary p osition > for starter) for my magnetos, how could I wire it so that it would operate > like a keyed ignition switch, i.e., shut the right mag down during start, b ut > automatically come online after I release the starter? > > Seems like you'd want the starter on the RIGHT mag toggle switch... and > in the "start" position it grounds the right mag P-lead. > > Paul > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=452646#452646 > > ________________________________ Message 4 _____________________________________ Time: 01:43:44 PM PST US From: "Ralph E. Capen" Subject: RE: AeroElectric-List: New EarthX battery I threw one full turn to the adjuster on the backup regulator - that did the trick to get it started. Next I'll measure the voltage at the battery while things are running so I can optimize it as indicated below. I had installed them without checking or adjusting them for the original PC680 - my AFS3400 showed the voltage at 13.8 with the usual stuff running.. Thanks! From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Sent: Sunday, January 31, 2016 3:14 PM Subject: Re: AeroElectric-List: New EarthX battery At 11:24 AM 1/31/2016, you wrote: Takes up less space, weighs a lot less and spins the engine like crazy! Even though I had an Odyssey PC680 previously, I went with the EarthX ETX900. Here's my question.: First startup with the new battery was fine - engine came to life immediately. My usual process is to bring the backup alternator (20 amp vacuum pad mounted) on line first - then the primary. The backup alternator did not come on line - the primary did when I selected it. Is it possible that the new battery tried to take so much power to recharge after the start sequence that is shredded the coupling? I haven't pulled it yet so I don't know if that was the failure mode. What is the setpoint voltage on your standby alternator? It may be that it's set LOWER than the voltage delivered by the LiFePo battery . . . so it 'thinks' everything is okay and doesn't fails to get the alternator out of bed. The higher and flatter discharge curve of the LiFePo battery may call for an adjustment of the setup on the stand-by regulators. I think we used to set those at 13.0 . . . certainly it needs to be HIGHER than the battery's delivery voltage . . . the whole idea behind the standby system is to hold all of the battery energy in reserve for approach to landing. The LiFePo cells just barely begin to accept a charge at 3.3 volts per cell but will achieve full charge at 3.4 volts per cell. 4 x 3.4 is 13.6 volts so I think I would set the standby altenator at 13.8 and the main alternator at 14.2v Bob . . . ------------------------------------------------------------------------------------- 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.