25 Apr 2024, 07:58 [ UTC - 5; DST ]
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Post subject: Diamond DA62 "Golden Hour on the Continental Divide" Posted: 15 Mar 2021, 21:07 |
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Joined: 01/09/14 Posts: 246 Post Likes: +119 Location: San Jose, CA (KRHV)
Aircraft: DA40
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By Steve Zimmerman. Definitely not mine. [youtube]http://youtu.be/3MDUoy_fOBo[/youtube] Username Protected wrote: The video starts just before sunset, running southbound along the Continental Divide south of Breckenridge at 13,000'. It ends with a time-lapse descent into the Denver metro area and a run northbound toward downtown Denver as the city lights take hold.
In the first sequence, after the turn eastbound you can see the high, snow-covered valley known as South Park at far right. Early in the time lapse sequence Pikes Peak is visible at far right, on the horizon; after a 270º turn northbound you can see Longs Peak at left on the horizon. The two Fourteeners are just under 100 miles apart. More on Steve's YouTube channel: https://www.youtube.com/channel/UC81Dj-fEs6_qtRqcO7rVRvg
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Post subject: Re: Diamond DA62 "Golden Hour on the Continental Divide" Posted: 17 Mar 2021, 16:04 |
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Joined: 12/17/17 Posts: 4 Post Likes: +4 Location: KEIK
Aircraft: 1980 Bonanza A36
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Username Protected wrote: By Steve Zimmerman. Definitely not mine. [youtube]http://youtu.be/3MDUoy_fOBo[/youtube] More on Steve's YouTube channel: https://www.youtube.com/channel/UC81Dj-fEs6_qtRqcO7rVRvgThanks for posting this here, Chris. I also own an A36 Bonanza; tomorrow we’re flying both airplanes in a cover shoot for a national magazine. The A36 is the photo ship and the Diamond (which I’ll be flying) is the subject. I’m used to being the shooter rather than the subject; should be fun. You can see more of my aviation photography on my website, https://www.stevezphoto.us
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Post subject: Re: Diamond DA62 "Golden Hour on the Continental Divide" Posted: 27 Mar 2021, 11:34 |
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Joined: 06/09/09 Posts: 4573 Post Likes: +3298
Aircraft: C182P, Merlin IIIC
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Saw one of these up close today. Nice looking plane.
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Post subject: Re: Diamond DA62 "Golden Hour on the Continental Divide" Posted: 28 Mar 2021, 16:21 |
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Joined: 09/16/10 Posts: 8892 Post Likes: +1956
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Username Protected wrote: Nice plane.
One odd thing though is that (according to the AFM I downloaded from the manufacturer's website) if you have a dual alternator failure, you can expect the engines to stop in 30 minutes (when battery backup is exhausted). The engine control units apparently cannot function at all without electricity. Seems it does, interesting. Is this what you are referring to? >>> 3.3.1 page 101 of 508 (Referred to, on page 4B-20, section 4B.3.6) http://support.diamond-air.at/fileadmin ... mplete.pdf"(b) Both Alternators Failed WARNING If both alternators fail at the same time, reduce all electrical equipment to a minimum. Expect battery power to last 30 minutes and land the airplane as soon as possible. Expect engine stoppage after this period of time."I guess the ECU's like to have operating current. Logical enough.
_________________ If you think nobody cares about you. Try not paying your income tax.
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Post subject: Re: Diamond DA62 "Golden Hour on the Continental Divide" Posted: 28 Mar 2021, 17:29 |
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Joined: 04/26/13 Posts: 19965 Post Likes: +19716 Location: Columbus , IN (KBAK)
Aircraft: 1968 Baron D55
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Username Protected wrote: I guess the ECU's like to have operating current. Logical enough. Logical enough, but is it necessary? Why not have a fail safe mode that leaves it at a pre-set power setting, say 75%? Lots of modern aircraft have FADEC and still revert to a crude manual control if the computer fails.
_________________ My last name rhymes with 'geese'.
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Post subject: Re: Diamond DA62 "Golden Hour on the Continental Divide" Posted: 28 Mar 2021, 18:58 |
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Joined: 12/24/17 Posts: 1031 Post Likes: +960
Aircraft: A36
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Maybe it doesn't have an engine driven fuel pump?
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Post subject: Re: Diamond DA62 "Golden Hour on the Continental Divide" Posted: 29 Mar 2021, 05:38 |
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Joined: 02/15/21 Posts: 2539 Post Likes: +1264
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Username Protected wrote: Is this what you are referring to?
Yep. Kind of takes away the comfort of flying a twin, especially over water. Admittedly a dual alternator failure seems pretty unlikely, but so is a SETP engine failure. And I would not feel totally comfortable flying a SETP any appreciable distance over water. On the DA42 they have a one-time-use lithium manganese primary battery backup system for the backup flight instruments (not sure what they use for this in the DA62). Maybe they could install a similar, larger primary battery backup system on the DA42 and DA62 to augment the rechargeable ECU backup batteries. I wonder how big a battery you would need to run the ECU's for, say, three hours? When we're all flying electric planes this will become moot...
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Post subject: Re: Diamond DA62 "Golden Hour on the Continental Divide" Posted: 29 Mar 2021, 06:45 |
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Joined: 11/03/08 Posts: 14582 Post Likes: +22963 Location: Peachtree City GA / Stoke-On-Trent UK
Aircraft: A33
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Username Protected wrote: I guess the ECU's like to have operating current. Logical enough. Logical enough, but is it necessary? Why not have a fail safe mode that leaves it at a pre-set power setting, say 75%? Lots of modern aircraft have FADEC and still revert to a crude manual control if the computer fails. Hi John, you must be talking turbines. It's pretty easy to keep a turbine running - just continuously spray in some fuel.
A computer-controlled diesel engine has fuel injectors operated by a waveform, which is produced by the ECM. The ECM operates the electronic injectors at varying timing and duration depending on the maps it's programmed with. Usually, the waveform generator is integral with the ECM.
So there is no way to operate the injectors without the ECM. Generally these are extremely reliable, far more reliable than older diesels with mechanical injection pumps. Still, on many marine engines there are dual redundant ECM's with automatic failover.
In no case though, can you operate the ECM (and therefore the fuel injectors) without electricity.
as far as backup ecm operation, there are lots of implementations that vary from full redundancy to limp-home bare bones. The way I've been involved in these, it can be set to automatically fail-over or you can manually select one ECM or the other at this panel circled in red.
But again, this is in a boat. The whole idea starts to seem like a lot of weight and wiring on a light airplane.
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