All glass cockpits and engine start / oil pressure monitoring - Zenith Aircraft Builders and Flyers2024-03-28T19:08:18Zhttps://zenith.aero/forum/topics/all-glass-cockpits-and-engine-start-oil-pressure-monitoring?commentId=2606393%3AComment%3A719194&x=1&feed=yes&xn_auth=noMy Dynon D-180 has been on fo…tag:zenith.aero,2020-04-28:2606393:Comment:7191942020-04-28T16:28:25.859ZDavid Gallagherhttps://zenith.aero/profile/DavidGallagher
<p>My Dynon D-180 has been on for every engine start over the past 12 years without missing a beat. </p>
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<p>This is from their Users Guide: "The FlightDEK-D180 requires between 10 and 30 volts DC for operation and has inputs for an external backup power supply and a keep-alive voltage. It is acceptable to have the FlightDEK-D180 turned on during engine start." I imagine their other products are the same.</p>
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<p>Dave G</p>
<p>My Dynon D-180 has been on for every engine start over the past 12 years without missing a beat. </p>
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<p>This is from their Users Guide: "The FlightDEK-D180 requires between 10 and 30 volts DC for operation and has inputs for an external backup power supply and a keep-alive voltage. It is acceptable to have the FlightDEK-D180 turned on during engine start." I imagine their other products are the same.</p>
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<p>Dave G</p> Hi Orlando,
Yeah that makes…tag:zenith.aero,2020-04-25:2606393:Comment:7188582020-04-25T21:24:55.273ZRob Ahttps://zenith.aero/profile/RobertArchibald
<p>Hi Orlando,</p>
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<p>Yeah that makes good sense to monitor the engine during startup. Which is what I want to do but with an all glass cockpit (and according to the GRT folks) you really shouldn't be powering the EFIS solely on the same battery as the starter. There is potential that the EFIS not have enough power which could cause it to reboot. Not a horrible thing if it happens a few times but repeated occurrences could damage it.</p>
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<p>Now the EIS Eng Monitor from what I've…</p>
<p>Hi Orlando,</p>
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<p>Yeah that makes good sense to monitor the engine during startup. Which is what I want to do but with an all glass cockpit (and according to the GRT folks) you really shouldn't be powering the EFIS solely on the same battery as the starter. There is potential that the EFIS not have enough power which could cause it to reboot. Not a horrible thing if it happens a few times but repeated occurrences could damage it.</p>
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<p>Now the EIS Eng Monitor from what I've read is OK to have on the same battery. So perhaps just using it until the engine is started like what Vance has done is a good idea. Or install a second battery to provide as a second feed to the EFIS. The EFIS will use most of the current from whatever source has the greater voltage (I'm guessing Dynon does this too) but I was trying to keep the weight off and an extra 4 Ah battery maybe a pound or two.</p>
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<p></p> The Dynon Skyview installatio…tag:zenith.aero,2020-04-25:2606393:Comment:7189532020-04-25T18:00:31.130ZOrlandohttps://zenith.aero/profile/Orlando
<p>The Dynon Skyview installation schematic recommends at least one display be connected to the master bus so that you can monitor engine parameters during start with the Avionics bus turned off.</p>
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<p><a href="https://www.dynonavionics.com/includes/guides/103488-000%20-%20REV%20C%20-%20WIRING%20DIAGRAM%20TYPICAL%20HDX%20DUAL%20DISPLAY.pdf" target="_blank" rel="noopener">Dynon Wiring Schematic</a></p>
<p>The Dynon Skyview installation schematic recommends at least one display be connected to the master bus so that you can monitor engine parameters during start with the Avionics bus turned off.</p>
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<p><a href="https://www.dynonavionics.com/includes/guides/103488-000%20-%20REV%20C%20-%20WIRING%20DIAGRAM%20TYPICAL%20HDX%20DUAL%20DISPLAY.pdf" target="_blank" rel="noopener">Dynon Wiring Schematic</a></p> Hey Rob, as much as I am awar…tag:zenith.aero,2020-04-24:2606393:Comment:7185222020-04-24T15:00:52.604ZDavid J. Beaulieuhttps://zenith.aero/profile/DavidJBeaulieu
<p>Hey Rob, as much as I am aware, Dynon doesn't take a position on the issue. Practically, I'm not sure it matters to most modern electronics anymore operating in a well designed electrical distribution system. I have a dual screen D700 setup, each on a separate bus which are both powered up with a keyed master ( no avionics master). Like John A, I power up the screens and everything else during my interior preflight and by the time I'm done my requisite checks and ready for engine start,…</p>
<p>Hey Rob, as much as I am aware, Dynon doesn't take a position on the issue. Practically, I'm not sure it matters to most modern electronics anymore operating in a well designed electrical distribution system. I have a dual screen D700 setup, each on a separate bus which are both powered up with a keyed master ( no avionics master). Like John A, I power up the screens and everything else during my interior preflight and by the time I'm done my requisite checks and ready for engine start, everything has booted, acquired GPS data, etc. and I can monitor start parameters. Engine start is from a dual EarthX battery setup running in parallel for the start so there is plenty of energy for everything even during the start. So far so good...</p> Internal battery eh, so Dynon…tag:zenith.aero,2020-04-24:2606393:Comment:7185162020-04-24T14:24:27.261ZRob Ahttps://zenith.aero/profile/RobertArchibald
<p>Internal battery eh, so Dynon prefers to not have the engine started on the same battery either I guess.</p>
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<p>Internal battery eh, so Dynon prefers to not have the engine started on the same battery either I guess.</p>
<p></p> With Dynon use the internal b…tag:zenith.aero,2020-04-23:2606393:Comment:7187882020-04-23T23:43:06.487ZJay Carterhttps://zenith.aero/profile/JayMCarter
<p>With Dynon use the internal battery during start.</p>
<p>With Dynon use the internal battery during start.</p> Now that I think about it, I…tag:zenith.aero,2020-04-23:2606393:Comment:7185702020-04-23T21:26:15.889ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p>Now that I think about it, I usually turn on the master first thing so the EFIS and EMS have already booted before engine start since I usually pause and verify fuel quantity on the EFIS and run through my checklist, so as you say, perhaps it's a moot point.</p>
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<p>John</p>
<p>Now that I think about it, I usually turn on the master first thing so the EFIS and EMS have already booted before engine start since I usually pause and verify fuel quantity on the EFIS and run through my checklist, so as you say, perhaps it's a moot point.</p>
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<p>John</p> Hi Vince,
thanks! I like ide…tag:zenith.aero,2020-04-23:2606393:Comment:7187822020-04-23T20:46:01.003ZRob Ahttps://zenith.aero/profile/RobertArchibald
<p>Hi Vince,</p>
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<p>thanks! I like idea.</p>
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<p>If others have something different still please let me know.</p>
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<p>thanks,</p>
<p>Hi Vince,</p>
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<p>thanks! I like idea.</p>
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<p>If others have something different still please let me know.</p>
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<p>thanks,</p> Hi Rob,
In my Corvair powere…tag:zenith.aero,2020-04-23:2606393:Comment:7184812020-04-23T20:35:03.017ZVance Lucashttps://zenith.aero/profile/VanceLucas
<p>Hi Rob, </p>
<p>In my Corvair powered 750 I have the GRT Sport EFIS fed from the avionics master and the GRT EIS on the master so I have RPM and Oil Pressure displayed on the EIS for startup and then they are also displayed on the EFIS after the avionics master is on and the EFIS boots up. </p>
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<p>Cheers,</p>
<p>Vance</p>
<p>Hi Rob, </p>
<p>In my Corvair powered 750 I have the GRT Sport EFIS fed from the avionics master and the GRT EIS on the master so I have RPM and Oil Pressure displayed on the EIS for startup and then they are also displayed on the EFIS after the avionics master is on and the EFIS boots up. </p>
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<p>Cheers,</p>
<p>Vance</p> Hi John,
Yeah that was my pl…tag:zenith.aero,2020-04-23:2606393:Comment:7187722020-04-23T19:43:03.529ZRob Ahttps://zenith.aero/profile/RobertArchibald
<p>Hi John,</p>
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<p>Yeah that was my plan too until I found this in the GRT Sport 10.1 manual:</p>
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<p>"If all the buses that power the display unit(s) and AHRS are also used to supply power to<br></br>the engine starter, then the display unit(s) and AHRS should be turned off during engine<br></br>start-up. This maximizes the current available for the starter and prevents undesirable<br></br>voltage fluctuations being applied to the display unit when it is booting up."</p>
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<p>I know…</p>
<p>Hi John,</p>
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<p>Yeah that was my plan too until I found this in the GRT Sport 10.1 manual:</p>
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<p>"If all the buses that power the display unit(s) and AHRS are also used to supply power to<br/>the engine starter, then the display unit(s) and AHRS should be turned off during engine<br/>start-up. This maximizes the current available for the starter and prevents undesirable<br/>voltage fluctuations being applied to the display unit when it is booting up."</p>
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<p>I know it says "when booting up" so it maybe a mute point once it's running. I'd rather not damage my very expensive new EFIS though.</p>
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<p>I'm also installing the Composite Design Radio Stack Power Panel also. They way they have the breakers arranged (EFIS and ENG data) on the essential bus really drives the need for a backup battery otherwise these things wouldn't be on the Radio master switch like the radio, gps and xponder). Maybe the best thing to do is confirm it with GRT that once it's booted it's okay to start the engine on the same battery as the EFIS.</p>
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<p>curious what others have done too.</p>
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<p>thanks,</p>