Author |
Message |
Topic: Excessive Amperage |
dj_theis
Replies: 16
Views: 2997
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Forum: AeroElectric-List Posted: Sat Jul 29, 2023 5:46 am Subject: Re: Excessive Amperage |
…….Is anyone else confused by Figures 2, 3 and 5 in the EarthX article that Joe linked above?……..
Yes, at a minimum it’s unclear what they are trying to convey and certainly misleading. ... |
Topic: Starter Circuit: Verner 7U Radial |
dj_theis
Replies: 2
Views: 1055
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Forum: AeroElectric-List Posted: Sat Jul 15, 2023 4:23 am Subject: Re: Starter Circuit: Verner 7U Radial |
If the separate contactor is necessary, then please explain:
1. Why?
2. Should it supply all power to the starter -- both motor current and control signal -- or, just the control signal?
I th ... |
Topic: Overvoltage Protection for Rotax 9-Series Engines |
dj_theis
Replies: 3
Views: 1339
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Forum: AeroElectric-List Posted: Tue May 23, 2023 10:38 am Subject: Re: Overvoltage Protection for Rotax 9-Series Engines |
Nice design Eric.
In particular, I appreciate your use and reasoning behind switching the AC side of the charge circuit. Reliable switching of higher current DC generally requires relays that are ... |
Topic: AC current reading for Revmaster engine |
dj_theis
Replies: 4
Views: 1870
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Forum: AeroElectric-List Posted: Tue Sep 27, 2022 6:45 pm Subject: Re: AC current reading for Revmaster engine |
BTW . . . I've searched my library for a copy
of the R-2300 installation manual and came up
empty. Can anyone point me to a download link
or email me a copy?
Attached is the "Electrical&qu ... |
Topic: AC current reading for Revmaster engine |
dj_theis
Replies: 4
Views: 1870
|
Forum: AeroElectric-List Posted: Tue Sep 27, 2022 6:38 pm Subject: Re: AC current reading for Revmaster engine |
Quote:
Increasing air flow is job 1, wrt cooling this stator. Impregnating the wiring is an improvement that I advocate but do not have data on it. My direct conversation with the stator wire manufac ... |
Topic: Regulator location |
dj_theis
Replies: 2
Views: 1192
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Forum: AeroElectric-List Posted: Fri Sep 23, 2022 5:37 am Subject: Regulator location |
I’ve been trading emails with another builder and they asked my thoughts on the location of the ship’s voltage regulator. “What are the pros and cons to mounting the regulator on the occupant s ... |
Topic: AC current reading for Revmaster engine |
dj_theis
Replies: 6
Views: 15274
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Forum: AeroElectric-List Posted: Fri Sep 23, 2022 4:43 am Subject: Re: AC current reading for Revmaster engine |
Checking the DC current after the voltage regulator would not be as indicative since there would be some loss in the regulator and if the regulator is the shunt type DC current would not represent wh ... |
Topic: Battery capacity test |
dj_theis
Replies: 16
Views: 5442
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Forum: AeroElectric-List Posted: Sun Feb 13, 2022 6:18 am Subject: Re: Battery capacity test |
Good question Paul and I believe the short answer is “yes, temperature will affect battery performance.” It’s a common expectation that temperature will impact any chemical reaction rate and ba ... |
Topic: ULPower Alternator/Regulator |
dj_theis
Replies: 16
Views: 5225
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Forum: AeroElectric-List Posted: Fri Dec 24, 2021 6:30 am Subject: Re: ULPower Alternator/Regulator |
What kind of alternator is on the UL350, wound
field or permanent magnet?
From their website, all the UL 350 engines are listed as having integrated PMA charging systems with external R/R. All ... |
Topic: ULPower Alternator/Regulator |
dj_theis
Replies: 16
Views: 5225
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Forum: AeroElectric-List Posted: Fri Dec 24, 2021 6:29 am Subject: Re: ULPower Alternator/Regulator |
What kind of alternator is on the UL350, wound
field or permanent magnet?
From their website, all the UL 350 engines are listed as having integrated PMA charging systems with external R/R. All ... |
Topic: Over Voltage Crowbar |
dj_theis
Replies: 10
Views: 4224
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Forum: AeroElectric-List Posted: Fri Nov 19, 2021 10:50 am Subject: Re: Over Voltage Crowbar |
If nuisance tripping occurs, a capacitor (s) connected between U1 Pin 1 (FB1) and ground might help
Thanks Joe,
I meant to include the data sheet for U1 in my original post and on page 10 (I bel ... |
Topic: Over Voltage Crowbar |
dj_theis
Replies: 10
Views: 4224
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Forum: AeroElectric-List Posted: Fri Nov 19, 2021 10:43 am Subject: Re: Over Voltage Crowbar |
Looking at the 3D rendering image that you posted, I would be worried about the board layout. If the trace under the "R2" and "D1" markings is the only copper carrying trip current ... |
Topic: Over Voltage Crowbar |
dj_theis
Replies: 10
Views: 4224
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Forum: AeroElectric-List Posted: Thu Nov 18, 2021 10:41 am Subject: Re: Over Voltage Crowbar |
What's the maximum alternator size (amp output) that this device can handle?
Cheers! Stu.
HI Stu,
The device does not conduct any charge current from the alternator. So, there is no relationship ... |
Topic: Over Voltage Crowbar |
dj_theis
Replies: 10
Views: 4224
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Forum: AeroElectric-List Posted: Thu Nov 18, 2021 7:19 am Subject: Re: Over Voltage Crowbar |
Looks nice. Are you planning on selling the completed modules? If not, what's a guestimate of component prices?
Thanks Charlie, that means a lot coming from you.
I'd be happy to pass on comple ... |
Topic: Over Voltage Crowbar |
dj_theis
Replies: 10
Views: 4224
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Forum: AeroElectric-List Posted: Wed Nov 17, 2021 7:16 pm Subject: Over Voltage Crowbar |
I've noticed the stand alone overvoltage switches are not as readily available and I asked a friend of mine if he would put together a board using an IC provided by Analog Devices.
https://www.anal ... |
Topic: Dual alternators |
dj_theis
Replies: 17
Views: 5324
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Forum: AeroElectric-List Posted: Thu Jun 17, 2021 4:50 am Subject: Dual alternators |
I have a somewhat academic question regarding design and operation of a dual alternator system. I’ve imagined, but never tested, that running two alternators that are feeding a single battery bus w ... |
Topic: Thread Lacing Tape |
dj_theis
Replies: 31
Views: 10967
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Forum: AeroElectric-List Posted: Tue May 11, 2021 5:12 am Subject: Re: Thread Lacing Tape |
I’ve used a similar product that is a little less refined (no hole die cut in on end to wrap a nearby tube) and found it to be very useful for all sorts of wrapping tasks.
https://www.amazon.com/ ... |
Topic: Thermocouple Accuracy |
dj_theis
Replies: 13
Views: 4791
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Forum: AeroElectric-List Posted: Thu Apr 08, 2021 4:57 am Subject: Re: Thermocouple Accuracy |
I like Charlie’s suggestion of checking other calibration configurations on the MGL.
To respond to Mike’s first question, “is 10 degrees close enough?”
It probably depends on your expect ... |
Topic: Thermocouple Accuracy |
dj_theis
Replies: 13
Views: 4791
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Forum: AeroElectric-List Posted: Sun Apr 04, 2021 5:22 am Subject: Re: Thermocouple Accuracy |
Mike,
Maybe this link will offer a few ideas to help trouble shoot.
https://blog.wika.us/products/temperature-products/six-common-causes-thermocouple-temperature-measurement-errors/
The ice b ... |
Topic: Revmaster R2300 Ignition |
dj_theis
Replies: 10
Views: 8568
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Forum: AeroElectric-List Posted: Mon Feb 15, 2021 8:15 am Subject: Re: Revmaster R2300 Ignition |
I just found this old thread. Got to researching the topic as I've a R-2300 that is currently being built. After looking this all over, here is what I'm thinking. Do you see any issues with doing it ... |
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