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kenryan
Joined: 20 Oct 2009
Posts: 426
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 Posted: Thu Aug 16, 2018 8:07 am Post subject: alternator gets hot while hangar flying |
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I've been spending some time in the seat learning to use my Dynon. I just noticed that my alternator (Denso, internally regulated) gets hot with the power on. I can hold my hand against it, but just barely. Any hotter and I would need to remove my hand. I guess it makes sense that it would get hot (energizing the field). Am I harming the alternator? Should I unplug the field wire?
Ken
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nuckolls.bob(at)aeroelect
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| Posted: Thu Aug 16, 2018 8:25 am Post subject: alternator gets hot while hangar flying |
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At 11:06 AM 8/16/2018, you wrote:
| Quote: | | I've been spending some time in the seat learning to use my Dynon. I just noticed that my alternator (Denso, internally regulated) gets hot with the power on. I can hold my hand against it, but just barely. Any hotter and I would need to remove my hand. I guess it makes sense that it would get hot (energizing the field). Am I harming the alternator? Should I unplug the field wire? |
If you have wired it per any of the z-figures, then
you're already configured for battery-only, ground
ops by leaving the DC MASTER switch in BAT only postion
when the engine is not running.
What are you using for alternator control? Can you
not turn it off from the cockpit?
Bob . . .
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cluros(at)gmail.com
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| Posted: Thu Aug 16, 2018 8:28 am Post subject: alternator gets hot while hangar flying |
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Could you simply turn the alternator off? Or pull the field breaker?
On Thu, Aug 16, 2018 at 9:06 AM, Ken Ryan <keninalaska(at)gmail.com (keninalaska(at)gmail.com)> wrote:
| Quote: | I've been spending some time in the seat learning to use my Dynon. I just noticed that my alternator (Denso, internally regulated) gets hot with the power on. I can hold my hand against it, but just barely. Any hotter and I would need to remove my hand. I guess it makes sense that it would get hot (energizing the field). Am I harming the alternator? Should I unplug the field wire?
Ken
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kenryan
Joined: 20 Oct 2009
Posts: 426
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| Posted: Thu Aug 16, 2018 9:07 am Post subject: alternator gets hot while hangar flying |
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Bob, no I do not have a BAT only position on my master (drawing attached). Yes, I do have a field breaker that I can easily pull, and I will pull it from now on. Have I harmed my alternator by not turning it off previously?
On Thu, Aug 16, 2018 at 8:32 AM Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
| Quote: | Could you simply turn the alternator off? Or pull the field breaker?
On Thu, Aug 16, 2018 at 9:06 AM, Ken Ryan <keninalaska(at)gmail.com (keninalaska(at)gmail.com)> wrote:
| Quote: | I've been spending some time in the seat learning to use my Dynon. I just noticed that my alternator (Denso, internally regulated) gets hot with the power on. I can hold my hand against it, but just barely. Any hotter and I would need to remove my hand. I guess it makes sense that it would get hot (energizing the field). Am I harming the alternator? Should I unplug the field wire?
Ken
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echristley(at)att.net
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| Posted: Thu Aug 16, 2018 9:27 am Post subject: alternator gets hot while hangar flying |
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I go out to my Jeep in the summer and parts of it are so hot I can't keep my hands on them. I get in it and drive, and the engine compartment gets even hotter. I shut down, and it gets even hotter. The alternator has lived in there for YEARS and never given me a problem.
If you were able to keep your hand on it, it is probably still wearing its sweater. 
On Thursday, August 16, 2018 1:08 PM, Ken Ryan <keninalaska(at)gmail.com> wrote:
Bob, no I do not have a BAT only position on my master (drawing attached). Yes, I do have a field breaker that I can easily pull, and I will pull it from now on. Have I harmed my alternator by not turning it off previously?
On Thu, Aug 16, 2018 at 8:32 AM Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
| Quote: | Could you simply turn the alternator off? Or pull the field breaker?
On Thu, Aug 16, 2018 at 9:06 AM, Ken Ryan <keninalaska(at)gmail.com (keninalaska(at)gmail.com)> wrote: | Quote: | I've been spending some time in the seat learning to use my Dynon. I just noticed that my alternator (Denso, internally regulated) gets hot with the power on. I can hold my hand against it, but just barely. Any hotter and I would need to remove my hand. I guess it makes sense that it would get hot (energizing the field). Am I harming the alternator? Should I unplug the field wire?
Ken
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nuckolls.bob(at)aeroelect
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| Posted: Thu Aug 16, 2018 10:58 am Post subject: alternator gets hot while hangar flying |
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At 12:05 PM 8/16/2018, you wrote:
| Quote: | | Bob, no I do not have a BAT only position on my master (drawing attached). Yes, I do have a field breaker that I can easily pull, and I will pull it from now on. |
that will work
| Quote: | | Have I harmed my alternator by not turning it off previously? |
No, it will be fine.
Bob . . .
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gfarek(at)yahoo.com
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| Posted: Thu Aug 16, 2018 11:33 am Post subject: alternator gets hot while hangar flying |
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Pull the field breaker or fuse maybe.
Sent from my iPhone
On Aug 16, 2018, at 11:18 AM, Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
| Quote: | Could you simply turn the alternator off? Or pull the field breaker?
On Thu, Aug 16, 2018 at 9:06 AM, Ken Ryan <keninalaska(at)gmail.com (keninalaska(at)gmail.com)> wrote:
| Quote: | I've been spending some time in the seat learning to use my Dynon. I just noticed that my alternator (Denso, internally regulated) gets hot with the power on. I can hold my hand against it, but just barely. Any hotter and I would need to remove my hand. I guess it makes sense that it would get hot (energizing the field). Am I harming the alternator? Should I unplug the field wire?
Ken
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