---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 01/08/20: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:43 AM - Not receiving e-mail (Bobby Paulk) 2. 07:38 AM - Re: One battery/two alternators IFR z-diagram (johnbright) 3. 07:56 AM - Re: E-Mail Digest Not Working (rsmith52) 4. 09:36 AM - Re: Not receiving e-mail (Eric Page) 5. 01:07 PM - Re: Re: One battery/two alternators IFR z-diagram (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 05:43:06 AM PST US From: Bobby Paulk Subject: AeroElectric-List: Not receiving e-mail I have spent several hours on Comcast to find out why I am not receiving my emails from Matronics. I have had case numbers and talked to supervisors. Finally one said it was the sender but Matt said to open a Gmail account and since then I have not had a problem with it. I still get a random email thru Comcast but nothing regular. I would like to have it all on one server but I don't know if that is going to be possible. ________________________________ Message 2 _____________________________________ Time: 07:38:00 AM PST US Subject: AeroElectric-List: Re: One battery/two alternators IFR z-diagram From: "johnbright" nuckolls.bob(at)aeroelect wrote: > At 08:26 PM 12/18/2019, you wrote: > > > After doing some reading on the FAQ list, it looks like I should consider the Z-13/8 with the Z-25 excitation mod, or else the Z-14. I think I also now understand one of the drawbacks of Z-12 architecture is if the battery contactor fails, both alternators go offline. > > > > Michael- > > > That's generally not true with modern alternators . . . > and only a few of the legacy alternators. > > It's true that many alternators will not come > online without a battery present . . .but once > running, they'll hum along oblivious to battery > being there or not. > > With HEAVY inrush loads like klieg-lights in the > wings or hydraulic pump motors. It was theoretically > possible to stall an alternator . . .from which > recovery would be impossible unless a battery were > present. > . > . > . > > Bob . . . Hi Bob... question... need there be a load on a wound field alternator for it to continue working in case of battery disconnect? -------- John Bright, RV-6A, at FWF, O-360, dual SDSEFI EM-5-F Dual Batt Dual Alt RV-6A SDS dual EM-5-F john_s_bright@yahoo.com, Newport News, Va Read this topic online here: http://forums.matronics.com/viewtopic.php?p=494198#494198 ________________________________ Message 3 _____________________________________ Time: 07:56:00 AM PST US Subject: AeroElectric-List: Re: E-Mail Digest Not Working From: "rsmith52" Right now I am receiving the E-mail digests. It has been interrupted in the past for up to a couple weeks. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=494199#494199 ________________________________ Message 4 _____________________________________ Time: 09:36:18 AM PST US From: Eric Page Subject: Re: AeroElectric-List: Not receiving e-mail I frequently get two copies of emails from the forum, and I know Yahoo isn =99t creating duplicates of only Matronics emails but no others. Sometim es the duplicates are separated by minutes, sometimes by hours and occasiona lly by a day. I also get lots of Matronics emails filtered into the spam folder (I get ind ividual emails, not the digest), so I have to check that often. This could b e fixed by a white-list filter if Matt would set the software to send from a single Matronics address but instead, the echo routine spoofs each sender =99s address, making spam filtering much harder for the recipient=99 s host. I=99ve just been chalking it all up to the archaic forum software Matt uses to operate the Matronics empire. I don=99t know why he hasn =99t upgraded to a modern forum package but as long as he keeps running it o n donations, it=99s hard to complain. Eric > On Jan 8, 2020, at 5:41 AM, Bobby Paulk wrote: > I have spent several hours on Comcast to find out why I am not receiving m y emails from Matronics. I have had case numbers and talked to supervisors. Finally one said it was the sender but Matt said to open a Gmail account and since then I have not had a problem with it. I still get a random email th ru Comcast but nothing regular. I would like to have it all on one server bu t I don't know if that is going to be possible. ________________________________ Message 5 _____________________________________ Time: 01:07:29 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: One battery/two alternators IFR z-diagram > >Hi Bob... question... need there be a load on a wound field >alternator for it to continue working in case of battery disconnect? No . . . you can 'stall' a free-running alternator by hitting it with a big load, generally larger than it's nameplate rating. If you have and electro-hydraulic gear, then inrush on the PM pump motor may well cause a self-excited alternator to go down . . . but if you remove most if not all loads, they'll generally self excite and come back on line whereupon you can turn some things back on. Folks used to be fond of dual, 150 watt landing lights . . . turning both of these puppies on at the same time might take down an alternator that's not supported by a battery. With the advent of led lighting and the relative rarity of retractable gear airplanes, those antagonists are mostly ghosts of yesteryear. Depending on the regulator design, most alternators will come on line in an orderly fashion with small or no loads . . . they will run in a civilized manner as long as you don't hammer them with a 'start up transient' that exceeds nameplate rating. 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