 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
nuckolls.bob(at)aeroelect
Guest
|
 Posted: Sun Nov 12, 2023 11:20 am Post subject: No-name-fuses |
 |
|
At 11:13 PM 11/6/2023, you wrote:
| Quote: | Here is another illustrative test of no-name Chinese fuses. I would think twice before using these in an airplane. I wouldn’t use these in lawn equipment.
Bad Fuses
youtu.be
Sent from my iPad
|
This is an unfortunate posting to youtube. Especially
sad given what has to be thousands of hours effort in
the balance of learned gentleman's content. In this instance,
he does not demonstrate or explain the physics of
fusible protective devices.
The advice offered in conclusion of his demonstration
is not 'bad' in that one us quite safe to
favor name brand, legacy products supported
by specification documents. That's what a large
proportion of aviation design and manufacturing is
all about. But to broadly brush competing products
with lesser data based on his ill-conceived,
bench-top demonstration is beneath the quality
of his other works.
I've got a gaggle of 'amazon' fuses on order. I
have the tools to quickly quantify critical
characteristics for these devices. Don't need
another project but this one would yield some
measured and demonstrated data for coming to
a more refined judgement.
By the way, in this video, he held up a bottle
of 'test articles?' from a prior demonstration.
I was unable to locate the video where he
produced these carcasses. I'd appreciate a
head-up on his (or any other) study of
off off-label fuses.
Thanks!
Bob . . .
////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================
In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
 |
bobkuc(at)gmail.com
Guest
|
| Posted: Sun Nov 12, 2023 4:42 pm Post subject: No-name-fuses |
|
|
Thanks Bob.
That was very interesting and eye opener.
I was looking at the ones in Amazon but I could not find 1 and 2 and 3 amp ones and I didn't think I would need a lot of 30 amp ones. I did buy some of the 1,2 and 3 amp ones from digikey. Those were all littelfuse ones.
Bob
On Sun, Nov 12, 2023, 2:23 PM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:
| Quote: | At 11:13 PM 11/6/2023, you wrote:
| Quote: | Here is another illustrative test of no-name Chinese fuses. I would think twice before using these in an airplane. I wouldn’t use these in lawn equipment.
Bad Fuses
|
youtu.be
Sent from my iPad
| Quote: | On Nov 6, 2023, at 11:56 PM, Matthew S. Whiting <m.whiting(at)frontier.com (m.whiting(at)frontier.com)> wrote:
I can no longer find the video that actually tested the fuses to failure, but this one shows the problem using fuse resistance as the surrogate.
youtu.be
|
This is an unfortunate posting to youtube. Especially
sad given what has to be thousands of hours effort in
the balance of learned gentleman's content. In this instance,
he does not demonstrate or explain the physics of
fusible protective devices.
The advice offered in conclusion of his demonstration
is not 'bad' in that one us quite safe to
favor name brand, legacy products supported
by specification documents. That's what a large
proportion of aviation design and manufacturing is
all about. But to broadly brush competing products
with lesser data based on his ill-conceived,
bench-top demonstration is beneath the quality
of his other works.
I've got a gaggle of 'amazon' fuses on order. I
have the tools to quickly quantify critical
characteristics for these devices. Don't need
another project but this one would yield some
measured and demonstrated data for coming to
a more refined judgement.
By the way, in this video, he held up a bottle
of 'test articles?' from a prior demonstration.
I was unable to locate the video where he
produced these carcasses. I'd appreciate a
head-up on his (or any other) study of
off off-label fuses.
Thanks!
Bob . . .
////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================
In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
aeroelectric(at)cleanh2o.
Guest
|
| Posted: Sun Nov 12, 2023 5:23 pm Post subject: No-name-fuses |
|
|
fyi, known bad fuses,
For example, a safety recall:
https://tinyurl.com/3ekjatdh]
Joe
On Sun, 12 Nov 2023, Bob Kuc wrote:
| Quote: | Thanks Bob.
That was very interesting and eye opener.
I was looking at the ones in Amazon but I could not find 1 and 2 and 3 amp
ones and I didn't think I would need a lot of 30 amp ones. I did buy some
of the 1,2 and 3 amp ones from digikey. Those were all littelfuse ones.
Bob
On Sun, Nov 12, 2023, 2:23 PM Robert L. Nuckolls, III <
nuckolls.bob(at)aeroelectric.com> wrote:
> At 11:13 PM 11/6/2023, you wrote:
>
> Here is another illustrative test of no-name Chinese fuses. I would think
> twice before using these in an airplane. I wouldn’t use these in lawn
> equipment.
>
> Bad Fuses <https://youtu.be/apQU_VuJlFU>
>
> youtu.be <https://youtu.be/apQU_VuJlFU>
> Sent from my iPad
>
> On Nov 6, 2023, at 11:56 PM, Matthew S. Whiting <m.whiting(at)frontier.com>
> wrote:
>
> I can no longer find the video that actually tested the fuses to
> failure, but this one shows the problem using fuse resistance as the
> surrogate.
>
> youtu.be <https://youtu.be/nELwmfAOz_I>
> [image: []] <https://youtu.be/nELwmfAOz_I>
> This is an unfortunate posting to youtube. Especially
> sad given what has to be thousands of hours effort in
> the balance of learned gentleman's content. In this instance,
> he does not demonstrate or explain the physics of
> fusible protective devices.
>
> The advice offered in conclusion of his demonstration
> is not 'bad' in that one us quite safe to
> favor name brand, legacy products supported
> by specification documents. That's what a large
> proportion of aviation design and manufacturing is
> all about. But to broadly brush competing products
> with lesser data based on his ill-conceived,
> bench-top demonstration is beneath the quality
> of his other works.
>
> I've got a gaggle of 'amazon' fuses on order. I
> have the tools to quickly quantify critical
> characteristics for these devices. Don't need
> another project but this one would yield some
> measured and demonstrated data for coming to
> a more refined judgement.
>
> By the way, in this video, he held up a bottle
> of 'test articles?' from a prior demonstration.
> I was unable to locate the video where he
> produced these carcasses. I'd appreciate a
> head-up on his (or any other) study of
> off off-label fuses.
>
> Thanks!
> Bob . . .
>
> ////
> (o o)
> ===========o00o=(_)=o00o=========
> < Go ahead, make my day . . . >
> < show me where I'm wrong. >
> =================================
>
> In the interest of creative evolution
> of the-best-we-know-how-to-do based
> on physics and good practice.
>
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
nuckolls.bob(at)aeroelect
Guest
|
| Posted: Sun Nov 12, 2023 6:02 pm Post subject: No-name-fuses |
|
|
At 07:22 PM 11/12/2023, you wrote:
I read about this incident . . . unfortunately,
not very informative. Without having
exemplar fuses to test, the recall contributes
nothing to understanding.
Bob . . .
////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================
In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
Voyager
Joined: 30 Jun 2020
Posts: 77
|
| Posted: Sun Nov 12, 2023 6:17 pm Post subject: No-name-fuses |
|
|
What understanding are you seeking?
From my perspective as an airplane builder, the only understanding I really care about is knowing that the fuses I buy will perform according to the current/time curves that the manufacturer publishes. If a given fuse manufacturer either doesn’t provide performance data for its fuses or doesn’t produce fuses that perform according to spec, then I won’t use them.
I have been unable to find the first video I saw on these fuses (I think it was about the Harbor Freight fuses prior to the recall), but I wish I could as, if memory serves, the video maker took close-up pictures of the fuses and it was pretty clear that the fuse element in them was identical for every fuse size in the box and even the 5 A fuse would easily handle 30 A.
As a retired EE, I have some intellectual curiosity about fuse performance and how they are made, etc., but as a builder I am mainly concerned about having assurance of the fuse performance and understanding the physics is in the “nice to know” category, but not essential.
Matt
Sent from my iPad
| Quote: | On Nov 12, 2023, at 9:05 PM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:
At 07:22 PM 11/12/2023, you wrote:
I read about this incident . . . unfortunately,
not very informative. Without having
exemplar fuses to test, the recall contributes
nothing to understanding.
Bob . . .
////
(o o)
===========o00o=(_)=o00o=========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
=================================
In the interest of creative evolution
of the-best-we-know-how-to-do based
on physics and good practice.
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
