CH750 Off-field Landing - Zenith Aircraft Builders and Flyers2024-03-29T11:22:10Zhttps://zenith.aero/forum/topics/ch750-off-field-landing?id=2606393%3ATopic%3A646841&feed=yes&xn_auth=noI need to make a correction t…tag:zenith.aero,2018-09-28:2606393:Comment:6473862018-09-28T22:52:55.568ZLoren Warnerhttps://zenith.aero/profile/LorenWarner
<p>I need to make a correction to my previous post. The rpm's were much lower when the engine stopped running (likely under 1000 rpm), and without a propeller. Test run of our Viking 130 today shows the engine running just fine on the alternator only at 1600 rpm and the entire electrical load turned on, including our Dynon heated pitot tube.</p>
<p>I need to make a correction to my previous post. The rpm's were much lower when the engine stopped running (likely under 1000 rpm), and without a propeller. Test run of our Viking 130 today shows the engine running just fine on the alternator only at 1600 rpm and the entire electrical load turned on, including our Dynon heated pitot tube.</p> Just found Jan's video. Myste…tag:zenith.aero,2018-09-28:2606393:Comment:6471262018-09-28T17:58:30.136ZKen Ryanhttps://zenith.aero/profile/KenRyan
<p>Just found Jan's video. Mystery solved.</p>
<p>Just found Jan's video. Mystery solved.</p> Agreed and thank you, in addi…tag:zenith.aero,2018-09-28:2606393:Comment:6472252018-09-28T16:00:27.812ZJan Eggenfellnerhttps://zenith.aero/profile/JanEggenfellner
<p>Agreed and thank you, in addition to the violation of operating procedures that rendered the entire dual battery system incapable of saving the day. </p>
<p>Agreed and thank you, in addition to the violation of operating procedures that rendered the entire dual battery system incapable of saving the day. </p> " At least one question remai…tag:zenith.aero,2018-09-28:2606393:Comment:6472192018-09-28T13:24:02.009ZJonathan Fayhttps://zenith.aero/profile/JonathanFay
<p>"<span> At least one question remains: Why didn't the alternator keep the engine running?"</span></p>
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<p><span>No. This was obvious, the alternator switch was set to off. When the batteries were depleted, the engine stopped. If the alternator switch was on, the engine would have continued to run.</span></p>
<p>"<span> At least one question remains: Why didn't the alternator keep the engine running?"</span></p>
<p></p>
<p><span>No. This was obvious, the alternator switch was set to off. When the batteries were depleted, the engine stopped. If the alternator switch was on, the engine would have continued to run.</span></p> I applaud Jan's excellent vid…tag:zenith.aero,2018-09-28:2606393:Comment:6473592018-09-28T12:32:57.087ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p>I applaud Jan's excellent video and analysis!</p>
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<p>The video demonstrated that the plane's panel had a number of switches that were unlabeled or had what might have been labels at one time, but were now totally illegible. Not to be too critical, but I think that speaks volumes.</p>
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<p>John</p>
<p>N750A</p>
<p>I applaud Jan's excellent video and analysis!</p>
<p></p>
<p>The video demonstrated that the plane's panel had a number of switches that were unlabeled or had what might have been labels at one time, but were now totally illegible. Not to be too critical, but I think that speaks volumes.</p>
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<p>John</p>
<p>N750A</p> If batteries are properly mai…tag:zenith.aero,2018-09-28:2606393:Comment:6471072018-09-28T12:04:32.046ZKen Ryanhttps://zenith.aero/profile/KenRyan
If batteries are properly maintained and periodically tested, they should be the most reliable source of power available.<br />
<br />
If batteries are properly wired to the engine independent of each other, the chances of abruptly losing power to the engine should be as close to zero as it is possible to get.<br />
<br />
If there is a working voltmeter, the pilot should know immediately if the alternator quits charging, giving him time to get down without an emergency.<br />
<br />
Based on Jan's initial post, it would seem…
If batteries are properly maintained and periodically tested, they should be the most reliable source of power available.<br />
<br />
If batteries are properly wired to the engine independent of each other, the chances of abruptly losing power to the engine should be as close to zero as it is possible to get.<br />
<br />
If there is a working voltmeter, the pilot should know immediately if the alternator quits charging, giving him time to get down without an emergency.<br />
<br />
Based on Jan's initial post, it would seem that all three of these principles were violated, so loss of battery power is not surprising. At least one question remains: Why didn't the alternator keep the engine running? Jan,
Aviation Safety Officer…tag:zenith.aero,2018-09-28:2606393:Comment:6472622018-09-28T01:06:36.581ZJohn Schaperhttps://zenith.aero/profile/JohnSchaper
<p>Jan,</p>
<p>Aviation Safety Officer for 20+ years. Maybe change wiring to have covered toggle switch for alternator and key for engine start/run. There would not be many scenarios where the need to disconnect the alternator from the power circuit. </p>
<p></p>
<p>The key used to crank, run and connect the alternator leaves too many opportunities for human error especially with an unlabeled switch. </p>
<p></p>
<p>R,</p>
<p></p>
<p></p>
<p>Jan,</p>
<p>Aviation Safety Officer for 20+ years. Maybe change wiring to have covered toggle switch for alternator and key for engine start/run. There would not be many scenarios where the need to disconnect the alternator from the power circuit. </p>
<p></p>
<p>The key used to crank, run and connect the alternator leaves too many opportunities for human error especially with an unlabeled switch. </p>
<p></p>
<p>R,</p>
<p></p>
<p></p> Jan -
Nice job getting ahead…tag:zenith.aero,2018-09-28:2606393:Comment:6471042018-09-28T00:37:25.188ZBrad Rawlshttps://zenith.aero/profile/BradRawls
<p>Jan -</p>
<p></p>
<p>Nice job getting ahead of the trolls. I run dual buss Shorai batteries and they have been trouble free on my 110. If they get run down to <11 volts, you want to use their charger to get full capacity back, not a traditional wet cell charger.</p>
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<p>Brad Rawls</p>
<p>Jan -</p>
<p></p>
<p>Nice job getting ahead of the trolls. I run dual buss Shorai batteries and they have been trouble free on my 110. If they get run down to <11 volts, you want to use their charger to get full capacity back, not a traditional wet cell charger.</p>
<p></p>
<p>Brad Rawls</p> Excellent!tag:zenith.aero,2018-09-27:2606393:Comment:6472062018-09-27T23:26:21.151ZLoren Warnerhttps://zenith.aero/profile/LorenWarner
<p>Excellent!</p>
<p>Excellent!</p> tag:zenith.aero,2018-09-27:2606393:Comment:6471032018-09-27T23:02:04.497ZJan Eggenfellnerhttps://zenith.aero/profile/JanEggenfellner
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