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Search: Posts Made By: Mich48041
Forum: Electrical Systems Yesterday, 08:15 PM
Replies: 7
Views: 187
Posted By Mich48041
It is unlikely that you will find one better than...

It is unlikely that you will find one better than this:
https://www.digikey.com/en/products/detail/ixys/DSS2X121-0045B/416786
Looking at the forward voltage drop chart, at 3 amps, the voltage drop...
Forum: Electrical Systems 12-03-2021, 07:15 AM
Replies: 12
Views: 367
Posted By Mich48041
Here is a PWM circuit:

Here is a PWM circuit:
Forum: RV-12/RV-12iS 11-18-2021, 07:42 AM
Replies: 2
Views: 409
Posted By Mich48041
In addition to what Bob Y wrote, ground also goes...

In addition to what Bob Y wrote, ground also goes to a switch that ties Generator A
and Generator B grounds together for starting and for emergency backup.
Forum: Electrical Systems 11-14-2021, 09:24 PM
Replies: 42
Views: 3,902
Posted By Mich48041
Yes, my PC680 started my Rotax 912ULS just fine. ...

Yes, my PC680 started my Rotax 912ULS just fine. When I closed the throttle to land, the Dynon D-180 rebooted. It did not have a backup battery at the time. It turned out that the PC680 had a...
Forum: Electrical Systems 11-13-2021, 11:01 AM
Replies: 13
Views: 1,322
Posted By Mich48041
I would not use a fuse panel like this one. The...

I would not use a fuse panel like this one.
The contacts do not grip the fuses tightly which will lead to a bad connection.
-
Forum: RV-12/RV-12iS 11-08-2021, 05:44 PM
Replies: 14
Views: 2,538
Posted By Mich48041
Isn't EZ Turn a lubricant? I used it on the...

Isn't EZ Turn a lubricant? I used it on the rubber sleeve and it fixed the gasoline smell.
Or did you intend to type "no", not "now"?
Forum: Electrical Systems 10-31-2021, 06:44 PM
Replies: 42
Views: 3,902
Posted By Mich48041
I replaced the PC680 in my RV-12 with a...

I replaced the PC680 in my RV-12 with a Power-Sonic PDC-12200B Battery.
I had to use some persuasion on the battery box 3 inch dimension to get PDC-12200B in place. It is a very tight fit. The...
Forum: Electrical Systems 10-30-2021, 09:03 PM
Replies: 13
Views: 1,287
Posted By Mich48041
Don't worry about the the wattage in this...

Don't worry about the the wattage in this application.
A 30K ohm resistor is not even going to get warm, let alone hot.
Ignore the colored bands and measure the resistance with an ohmmeter.
Plus or...
Forum: Glass Cockpit 10-28-2021, 08:22 PM
Replies: 4
Views: 459
Posted By Mich48041
Read these...

Read these threads:
https://vansairforce.net/community/showthread.php?t=57892
https://vansairforce.net/community/showthread.php?t=99043
Make sure the white coax is not shorted at the ELT.
You can...
Forum: RV-12/RV-12iS 10-28-2021, 02:20 AM
Replies: 14
Views: 2,538
Posted By Mich48041
Disassemble and apply EZ Turn (fuel lube) to the...

Disassemble and apply EZ Turn (fuel lube) to the mating parts.
Forum: Electrical Systems 10-24-2021, 02:18 PM
Replies: 17
Views: 1,892
Posted By Mich48041
The Odyssey Battery owner's manual...

The Odyssey Battery owner's manual says:
https://eu.odysseybattery.com/wp-content/uploads/2020/06/ODYSSEY-Owners-Manual-AM-ODY-OM-AA_May-2019.pdf
"The deep cycle charging voltage must be within 14.1V...
Forum: Electrical Systems 10-24-2021, 08:35 AM
Replies: 17
Views: 1,892
Posted By Mich48041
Page 33 of this document from EarthX...

Page 33 of this document from EarthX says:
https://earthxbatteries.com/wp-content/uploads/2020/11/ETX_Manual_111017_Y-1.pdf
Do not charge above 14.6V
Do not use any charger with voltage that pulses...
Forum: Electrical Systems 10-23-2021, 07:03 AM
Replies: 17
Views: 1,892
Posted By Mich48041
Not only are there the dangers that Carl pointed...

Not only are there the dangers that Carl pointed out, but the danger of the voltage going higher yet. If it goes above 30, avionics could be ruined, costing thousands. Of course the VPX could be...
Forum: RV-12/RV-12iS 10-22-2021, 08:17 AM
Replies: 5
Views: 1,671
Posted By Mich48041
In my unprofessional opinion, it is a cosmetic...

In my unprofessional opinion, it is a cosmetic issue. The depression in the skin could possibly make it stronger.
Forum: Electrical Systems 10-21-2021, 06:28 PM
Replies: 22
Views: 2,113
Posted By Mich48041
A hard ground fault inside one of the avionics...

A hard ground fault inside one of the avionics could blow not only its own fuse,
but also the avionics master fuse. It is not a good idea to have two fuses in series.
Forum: Electrical Systems 10-21-2021, 07:04 AM
Replies: 22
Views: 2,113
Posted By Mich48041
How about Bob Nuckolls Z101 or...

How about Bob Nuckolls Z101 or Z102?
http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/
Forum: RV-12/RV-12iS 10-18-2021, 06:22 PM
Replies: 12
Views: 2,528
Posted By Mich48041
To confirm the location of the leak, tie lengths...

To confirm the location of the leak, tie lengths of string to each possible location. Let each string hang down. The gasoline will follow the string down. The wet string will lead to the leak. If...
Forum: RV-12/RV-12iS 10-14-2021, 12:05 PM
Replies: 7
Views: 2,015
Posted By Mich48041
BackCountry, here is LINK...

BackCountry, here is LINK (https://vansairforce.net/community/showpost.php?p=898782&postcount=234) for you.
Forum: Electrical Systems 10-06-2021, 07:03 PM
Replies: 28
Views: 2,890
Posted By Mich48041
Current is determined by the load. Loads take...

Current is determined by the load. Loads take what they want. Each load should have a fuse in series with it. If you want to limit the current, then don't turn too many loads on.
Forum: RV-12/RV-12iS 09-21-2021, 07:05 AM
Replies: 20
Views: 2,444
Posted By Mich48041
The instrument bay has cooling fans that will...

The instrument bay has cooling fans that will change the pressure.
Disconnect the static line from the back of the D-180. In its place, attach a spare tube and run it into the cabin.
Forum: RV-12/RV-12iS 09-11-2021, 12:48 PM
Replies: 9
Views: 1,432
Posted By Mich48041
I secured my RV-12 using the tail tie-down ring...

I secured my RV-12 using the tail tie-down ring while doing a full throttle engine run up. Even if you have a 200 HP engine, I don't think the airplane will be pulled apart.
Forum: RV-12/RV-12iS 09-06-2021, 03:36 PM
Replies: 8
Views: 1,005
Posted By Mich48041
I put a blast tube on my John Deere voltage...

I put a blast tube on my John Deere voltage regulator which is mounted using heat conductive paste in the original firewall shelf location. I also installed a thermocouple on the regulator and...
Forum: RV-12/RV-12iS 09-04-2021, 09:02 PM
Replies: 8
Views: 1,005
Posted By Mich48041
Bad connections can cause high voltage. If all...

Bad connections can cause high voltage. If all connections are good, then replace the regulator.
eBay item number:164832291787 costs $20
Or search for AM101406 or MIA881279
Yes, 15 volts is too...
Forum: Electrical Systems 08-23-2021, 06:34 PM
Replies: 27
Views: 2,545
Posted By Mich48041
A big danger, when using an external power supply...

A big danger, when using an external power supply or battery, is reversing polarity. Doing that can damage wiring and expensive avionics. A good way to protect against reversed polarity is to put a...
Forum: Electrical Systems 08-23-2021, 06:16 PM
Replies: 27
Views: 2,545
Posted By Mich48041
According to Bob Nuckolls' post[/URL] a...

According to Bob Nuckolls' post[/URL] a Cole-Hersee contactor will draw 1 amp cold, then drop to 0.6 amps when...
Forum: RV-12/RV-12iS 08-20-2021, 07:57 AM
Replies: 45
Views: 6,788
Posted By Mich48041
The RV-9 will land and takeoff shorter and cruise...

The RV-9 will land and takeoff shorter and cruise faster than the RV-12. The RV-9 can be throttled back for economical fuel consumption. Consider buying used. Other brands to consider are the...
Forum: Electrical Systems 08-13-2021, 07:03 AM
Replies: 10
Views: 1,355
Posted By Mich48041
The relay coils need diodes across them to...

The relay coils need diodes across them to protect the controlling switches from arcing and sparking. Banded end of diode connects to positive.
Forum: Electrical Systems 08-09-2021, 12:40 PM
Replies: 185
Views: 19,978
Posted By Mich48041
I wondered why he quoted my post. I never...

I wondered why he quoted my post. I never realized he thought that I was recommending a VP-X. I don't. I recommend fuses. How often do you replace fuses in your ground vehicle?
Forum: RV-12/RV-12iS 08-07-2021, 06:07 PM
Replies: 61
Views: 9,954
Posted By Mich48041
Read what Mike Busch has to say about...

Read what Mike Busch has to say about EGT:
https://resources.savvyaviation.com/wp-content/uploads/articles_eaa/EAA_2010-10_egt-myths-debunked.pdf
Carbureted engines often have EGT spreads of 150...
Forum: Electrical Systems 08-06-2021, 07:33 PM
Replies: 185
Views: 19,978
Posted By Mich48041
Circuit breakers are mechanical devices with...

Circuit breakers are mechanical devices with moving parts. CBs can fail open or closed. One time I tested a CB on the work bench before installing. I applied over current and instead of opening...
Forum: RV-12/RV-12iS 08-06-2021, 12:04 AM
Replies: 19
Views: 3,168
Posted By Mich48041
Seagull, plan's page 29A-11 dated 2013 calls for...

Seagull, plan's page 29A-11 dated 2013 calls for AN507C632R8 screws which are flat head countersunk SS.
My original plans dated 2008 call for AN515-6R8 to hold the instrument panel.
I am the only...
Forum: RV-12/RV-12iS 08-05-2021, 09:04 PM
Replies: 19
Views: 3,168
Posted By Mich48041
I am pretty sure that MS35206-228 are the screws...

I am pretty sure that MS35206-228 are the screws that are on my instrument panel. They are not the original screws. Yours are likely different.
Forum: RV-12/RV-12iS 08-05-2021, 07:45 PM
Replies: 19
Views: 3,168
Posted By Mich48041
Cowl screws: AN526C832R8 SS MACHINE SCREW $0.10...

Cowl screws: AN526C832R8 SS MACHINE SCREW $0.10 at Aircraft Spruce.
Washer possibly NAS1515H08L $0.03
If you need new instrument panel screws, use MS35206-228.
The heads do not strip out as easily as...
Forum: Electrical Systems 08-05-2021, 01:17 PM
Replies: 185
Views: 19,978
Posted By Mich48041
FUSES

What is wrong with fuses? Over 600 RV-12s are flying, all with fuses.
Fuses are light weight, inexpensive, easy to troubleshoot and replace by anyone. There is no "black box" to fail and ground the...
Forum: Electrical Systems 08-04-2021, 03:27 PM
Replies: 32
Views: 3,532
Posted By Mich48041
Bob Nuckolls has posted that max alternator field...

Bob Nuckolls has posted that max alternator field current is around 3 amps.
Search this archive for "3...
Forum: RV-12/RV-12iS 07-21-2021, 09:17 PM
Replies: 13
Views: 2,720
Posted By Mich48041
Try putting a very strong rare earth magnet on...

Try putting a very strong rare earth magnet on the bolt head.
Forum: RV-12/RV-12iS 07-20-2021, 07:25 PM
Replies: 22
Views: 8,665
Posted By Mich48041
In post 7 above, I said that I left the vinyl cap...

In post 7 above, I said that I left the vinyl cap (with a very small hole) on the pitot tube while flying. Airspeed seems to work OK, but AOA sounds the alarm at higher airspeeds. I no longer fly...
Forum: RV-12/RV-12iS 07-20-2021, 07:20 PM
Replies: 8
Views: 1,256
Posted By Mich48041
jbpilot101 recently had a fuel pressure problem. ...

jbpilot101 recently had a fuel pressure problem. You might want to talk to him.
Forum: RV-12/RV-12iS 07-20-2021, 07:17 PM
Replies: 8
Views: 1,256
Posted By Mich48041
Vansaircraft sells them, or at least they used...

Vansaircraft sells them, or at least they used to.
I think you want an ignition switch. :-)
LP3-F1G121R Spar Pin Indicator/Button
K2ABNPCCFA Master Sw DPDT
K2ABHPCABA Avionics, Nav/Strobc. A/P Sw's...
Forum: RV-12/RV-12iS 07-20-2021, 07:08 AM
Replies: 8
Views: 1,256
Posted By Mich48041
A likely cause is the fuel pressure sensor.

A likely cause is the fuel pressure sensor.
Forum: Electrical Systems 07-19-2021, 06:48 PM
Replies: 5
Views: 1,155
Posted By Mich48041
If a brownout booster is intended to be on...

If a brownout booster is intended to be on continuously, then it would need to be larger than the small one envisioned in Z-101.
If the brownout booster is turned on by the start switch, adding a...
Forum: Electrical Systems 07-18-2021, 10:01 PM
Replies: 5
Views: 1,155
Posted By Mich48041
If the aux switch is turned on to supply power to...

If the aux switch is turned on to supply power to the aux bus, then it can be expected the the aux bus will lose power when the aux switch is shut off.
The pilot will soon learn not to shut off the...
Forum: RV-12/RV-12iS 07-14-2021, 06:32 PM
Replies: 15
Views: 2,957
Posted By Mich48041
Chances are the tank will not empty in the...

Chances are the tank will not empty in the limited time prior to a forced landing.
As the ground and obstacles loom in front of the pilot, he will forget to close the dump valve.
The pilot has just...
Forum: RV-12/RV-12iS 07-10-2021, 04:27 PM
Replies: 9
Views: 1,671
Posted By Mich48041
Technically, the Rotax permanent magnet...

Technically, the Rotax permanent magnet alternator is a dynamo.
The faster it turns, the more volts it puts out. The voltage regulator limits the output voltage to about 14 volts by shutting off...
Forum: RV-12/RV-12iS 07-10-2021, 07:50 AM
Replies: 25
Views: 3,784
Posted By Mich48041
Is there a way to replace the brakes without...

Is there a way to replace the brakes without removing the wheels or else brake lines?
Am I removing the wheels unnecessarily?
Forum: RV-12/RV-12iS 07-09-2021, 11:55 AM
Replies: 4
Views: 1,188
Posted By Mich48041
The fuel tank sealant sold by Van's is flammable...

The fuel tank sealant sold by Van's is flammable even when cured.
Forum: Electrical Systems 07-06-2021, 12:00 PM
Replies: 29
Views: 2,790
Posted By Mich48041
Why complicate the installation and end up...

Why complicate the installation and end up causing the short circuit that you are trying to protect
against with a fuselink. Sometimes the cure is worse than the disease. Listen to Walt.
Forum: RV-12/RV-12iS 07-05-2021, 12:37 PM
Replies: 12
Views: 2,442
Posted By Mich48041
PilotYoung, remove that jumper. If there is...

PilotYoung, remove that jumper. If there is smoke in the cockpit, the first thing you might do is shut off the master switch. Your eyes are stinging from the smoke, but you find the master by feel...
Forum: Electrical Systems 07-04-2021, 09:10 PM
Replies: 29
Views: 2,790
Posted By Mich48041
The problem with having 2 fuses in series is that...

The problem with having 2 fuses in series is that in the case of a short circuit, both fuses could blow, even though the first fuse is much bigger. Then every thing down steam of the big fuse no...
Forum: RV-12/RV-12iS 07-02-2021, 01:33 PM
Replies: 7
Views: 1,507
Posted By Mich48041
I neglected to insert the rubber Real Gaskets...

I neglected to insert the rubber Real Gaskets into the carb groove, resulting in both leaking. Contrary to the advertised "Does not swell. Reusable", the gaskets swelled, making them unusable. ...
Forum: Electrical Systems 06-30-2021, 02:49 PM
Replies: 2
Views: 694
Posted By Mich48041
Read this...

Read this thread:
https://vansairforce.net/community/showthread.php?t=152596
Forum: RV-12/RV-12iS 06-27-2021, 08:04 AM
Replies: 25
Views: 4,945
Posted By Mich48041
I did not see any post about poor quality of the...

I did not see any post about poor quality of the Dynon sensors.
Which post is that?
Forum: RV-12/RV-12iS 06-22-2021, 10:05 PM
Replies: 12
Views: 2,442
Posted By Mich48041
I don't have a Skyview, but looking at the...

I don't have a Skyview, but looking at the schematic, I think that the master switch light behavior that you described is normal.
Do you have a SL-40. If so, does it work OK?
With the master switch...
Forum: Electrical Systems 06-22-2021, 09:13 AM
Replies: 1
Views: 691
Posted By Mich48041
G3EXPERT Question - GTX 335

Reference: GTX 335 w/GPS Installation Guidance Rev. 1 Page 3-13 Paragraph 3.13.1 Circuit Protection and Power Distribution
A friend of mine is building a Zenith 750 STOL VFR airplane. I tried to...
Forum: RV-12/RV-12iS 06-19-2021, 03:08 PM
Replies: 5
Views: 1,436
Posted By Mich48041
When shut off, ignition switches are actually...

When shut off, ignition switches are actually closed (on). It will not do any good to spray them with contact cleaner because they are already making good contact. Failing closed is an unusual...
Forum: RV-12/RV-12iS 06-17-2021, 07:34 PM
Replies: 22
Views: 8,665
Posted By Mich48041
You are right. It would not take a very big bug...

You are right. It would not take a very big bug to plug the very small hole.
Forum: RV-12/RV-12iS 06-16-2021, 09:07 AM
Replies: 22
Views: 8,665
Posted By Mich48041
I put a 5/16" vinyl screw protector on my pitot...

I put a 5/16" vinyl screw protector on my pitot tube. Hillman part 881039 from Lowes.
Not only does it protect the pitot tube, it also protects skin. The vinyl cap fits tightly.
I put a very small...
Forum: RV-12/RV-12iS 06-14-2021, 12:11 PM
Replies: 12
Views: 2,227
Posted By Mich48041
The same thing happened to a friend of mine. ...

The same thing happened to a friend of mine. Evidently the 5 amp fuse is OK for normal operations.
But if the Skyview is operated for any length of time on its internal backup battery, that battery...
Forum: RV-12/RV-12iS 06-11-2021, 06:42 PM
Replies: 8
Views: 1,697
Posted By Mich48041
Try sticking a strong rare earth on the bolt...

Try sticking a strong rare earth on the bolt head. Old hard drives contain strong magnets.
Forum: RV-12/RV-12iS 06-07-2021, 07:54 PM
Replies: 12
Views: 2,891
Posted By Mich48041
Don't the Matco wheel bearings have seals?

Don't the Matco wheel bearings have seals?
Forum: RV-12/RV-12iS 05-29-2021, 09:31 AM
Replies: 35
Views: 7,254
Posted By Mich48041
Have you tried powering the noise cancelling...

Have you tried powering the noise cancelling headsets with an independent
battery that is not connected to the aircraft electrical system?
Forum: RV General Discussion/News 05-23-2021, 07:48 AM
Replies: 62
Views: 21,304
Posted By Mich48041
My hearing aids (9.0T) purchased from Costco pick...

My hearing aids (9.0T) purchased from Costco pick up ignition noise when using the telecoil feature. The noise is not real loud, but is annoying. It goes away when one ignition is shut off. It...
Forum: Electrical Systems 05-21-2021, 06:51 PM
Replies: 15
Views: 2,916
Posted By Mich48041
How does the battery notify the pilot that it has...

How does the battery notify the pilot that it has shut itself off in protective mode? Is there an indicator light?
Forum: RV-12/RV-12iS 05-21-2021, 11:47 AM
Replies: 7
Views: 1,039
Posted By Mich48041
I agree with bjdecker, bad connection.

I agree with bjdecker, bad connection.
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