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Search: Posts Made By: Mich48041
Forum: Electrical Systems 10-01-2019, 05:19 PM
Replies: 4
Views: 680
Posted By Mich48041
It would help if you posted a link to the switch...

It would help if you posted a link to the switch datasheet. Without more info, all I can suggest is to run a separate positive wire to power the LEDs. Are the LEDs designed to be powered by 12...
Forum: RV-12/RV-12iS 10-01-2019, 02:50 PM
Replies: 7
Views: 752
Posted By Mich48041
If Van's control board AV-50000A is revision 2 or...

If Van's control board AV-50000A is revision 2 or later, then a 5K ohm pot may be connected to pins 6 & 7 of the switch module D-Sub on the AV-50000A.
So the first step is to determine the revision...
Forum: RV-12/RV-12iS 10-01-2019, 07:23 AM
Replies: 7
Views: 752
Posted By Mich48041
My RV-12 has a Dynon D-180, so I am not familiar...

My RV-12 has a Dynon D-180, so I am not familiar with the Skyview system.
But here are suggestions:
Go into the Skyview settings and change the dimmer output.
Try to find an adjustment pot on the...
Forum: RV-12/RV-12iS 09-29-2019, 02:50 PM
Replies: 8
Views: 961
Posted By Mich48041
If you want a heavier plane, how about an RV-14?

If you want a heavier plane, how about an RV-14?
Forum: RV-12/RV-12iS 09-25-2019, 08:34 PM
Replies: 11
Views: 716
Posted By Mich48041
I went on a long cross country flight once with...

I went on a long cross country flight once with the autopilot turned on. There were scattered clouds that caused up and down drafts. The D-180 was constantly asking me to adjust the trim so the...
Forum: RV-12/RV-12iS 09-25-2019, 08:19 PM
Replies: 22
Views: 2,309
Posted By Mich48041
The battery contactor uses about 3/4 amp more or...

The battery contactor uses about 3/4 amp more or less. If you touch a contactor after it has been on for a while, it will be very warm, maybe hot. No, there is no phantom load when the master...
Forum: RV-12/RV-12iS 09-25-2019, 05:55 PM
Replies: 22
Views: 2,309
Posted By Mich48041
Connect the spare battery to the load side of the...

Connect the spare battery to the load side of the master contactor and leave the master switch off. That will eliminate 3/4 of an amp that the battery contactor draws.
Forum: RV-12/RV-12iS 09-25-2019, 03:21 PM
Replies: 3
Views: 563
Posted By Mich48041
While you have the flap handle apart, modify the...

While you have the flap handle apart, modify the button or replace it with Van's new button if it has not already been done. Read this...
Forum: RV-12/RV-12iS 09-24-2019, 06:32 PM
Replies: 11
Views: 716
Posted By Mich48041
No, not if the plane has completed the flight...

No, not if the plane has completed the flight testing phase. You are free to make any changes desired as long as the plane still meets the definition of LSA, i.e., speed, weight, fixed gear, fixed...
Forum: RV-12/RV-12iS 09-24-2019, 06:21 PM
Replies: 3
Views: 509
Posted By Mich48041
See Page 1-17 of the maintenance manual or search...

See Page 1-17 of the maintenance manual or search for "Lifting and supporting".
If working by yourself, the nose can be lifted by hanging 60 or 70 pounds of weight on the tail tie-down. Slide the...
Forum: Electrical Systems 09-24-2019, 08:31 AM
Replies: 14
Views: 557
Posted By Mich48041
Many, if not most, avionics are grounded...

Many, if not most, avionics are grounded internally to their cases which are grounded to the airframe.
So yes, it would be normal for avionics to work with the ground power wire disconnected,...
Forum: Electrical Systems 09-20-2019, 08:34 PM
Replies: 11
Views: 748
Posted By Mich48041
Even though aux battery voltage can be measured...

Even though aux battery voltage can be measured on the main bus under the conditions described by the original poster, very little current can flow through the path that I described in post #6 above....
Forum: Electrical Systems 09-19-2019, 11:44 PM
Replies: 11
Views: 748
Posted By Mich48041
I was able to get the picture of the schematic...

I was able to get the picture of the schematic before it disappeared. It looked like an unmodified Bob N. Z-14 (http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/). There are two pages:...
Forum: RV-12/RV-12iS 09-17-2019, 01:16 PM
Replies: 10
Views: 2,275
Posted By Mich48041
If 3 rivets were never installed, then it is...

If 3 rivets were never installed, then it is possible that you broke the one that was installed. But it is unlikely that you broke 4 rivets.
Forum: Electrical Systems 09-15-2019, 07:22 AM
Replies: 11
Views: 748
Posted By Mich48041
The behavior that you have observed is normal for...

The behavior that you have observed is normal for the conditions that you described.
No, the bulb will not blow. Current is limited by the resistance of the lamp filament.
Too high voltage or...
Forum: Electrical Systems 09-05-2019, 03:06 PM
Replies: 21
Views: 2,335
Posted By Mich48041
No, nothing is suffering at 13 VDC. Many...

No, nothing is suffering at 13 VDC. Many avionics are rated at 10 to 30 volts. Alternators have failed many times.
The pilot keeps flying as the voltage slowly drops to 13, 12, maybe down to 11. ...
Forum: RV-12/RV-12iS 09-05-2019, 05:02 AM
Replies: 27
Views: 2,705
Posted By Mich48041
So the battery voltage has been dropping 0.1...

So the battery voltage has been dropping 0.1 volts per day for two days.
Is that with the battery connected to the aircraft electrical system?
Or is at least one battery terminal disconnected?
The...
Forum: RV-12/RV-12iS 09-04-2019, 11:18 AM
Replies: 20
Views: 2,475
Posted By Mich48041
I do not think it matters if the aircraft is...

I do not think it matters if the aircraft is registered as E-AB or E-LSA as long as
it is properly equipped and the operating limitations allow IFR.
Mel, we need your input.
Forum: Electrical Systems 09-03-2019, 08:33 PM
Replies: 21
Views: 2,335
Posted By Mich48041
Diode Manufacturer's data sheets have graphs that...

Diode Manufacturer's data sheets have graphs that show voltage drop.
The data sheet for your diode will show that as current increases, so does voltage drop.
Forum: RV-12/RV-12iS 09-03-2019, 08:15 PM
Replies: 8
Views: 777
Posted By Mich48041
Make sure that there is battery voltage on...

Make sure that there is battery voltage on regulator terminal "C" When the master switch is turned on.
Forum: RV-12/RV-12iS 09-03-2019, 08:14 PM
Replies: 8
Views: 777
Posted By Mich48041
It is unlikely that the capacitor is the...

It is unlikely that the capacitor is the problem.
The most likely cause of charging system failure on the RV-12 is the Ducati voltage regulator.
Some RV-12 owners have replaced the Ducati with John...
Forum: Electrical Systems 09-02-2019, 08:23 PM
Replies: 13
Views: 1,424
Posted By Mich48041
It could just be an old weak fuse. A bad fuse...

It could just be an old weak fuse. A bad fuse holder connection can generate heat which will blow a fuse.
Forum: RV-12/RV-12iS 09-01-2019, 06:08 AM
Replies: 70
Views: 7,184
Posted By Mich48041
With the D-180 RV-12, The GPS audio does not get...

With the D-180 RV-12, The GPS audio does not get
amplified by Van's control board. Use a ground loop isolator between the iFly
and the Flightcom 403 intercom pins 18 and 19 aux music...
Forum: RV-12/RV-12iS 08-31-2019, 05:07 PM
Replies: 27
Views: 2,705
Posted By Mich48041
Many Ducati voltage regulators put out less than...

Many Ducati voltage regulators put out less than 14 volts. My Ducati put out
13.8 volts. A friend's Ducati puts out 13.7 volts. I now have a John Deere
voltage regulator that puts out 14.1 when...
Forum: RV-12/RV-12iS 08-31-2019, 08:25 AM
Replies: 146
Views: 28,867
Posted By Mich48041
I measured 0.16 inch thickness of the old BR hub...

I measured 0.16 inch thickness of the old BR hub at the center weakest point.
The new D1 hub measures 0.27 inch at the same location.
So the D1 hub is more than a tenth of an inch thicker than the...
Forum: Electrical Systems 08-29-2019, 08:05 AM
Replies: 19
Views: 1,678
Posted By Mich48041
The reason a problem is showing up after 4 years...

The reason a problem is showing up after 4 years is because it took that long for
corrosion to form on a bad connection. Take all connections apart, both power and ground,
and clean and reassemble....
Forum: RV-12/RV-12iS 08-26-2019, 11:37 AM
Replies: 9
Views: 933
Posted By Mich48041
The D-180 Installation Guide agrees with Mike M. ...

The D-180 Installation Guide agrees with Mike M. It states,
The test is best performed while ALL electrical loads are turned on.
This is a valid test no matter what the brand or model of avionics.
Forum: RV-12/RV-12iS 08-22-2019, 01:48 PM
Replies: 8
Views: 1,170
Posted By Mich48041
Search for "orange citrus cleaner". Try on small...

Search for "orange citrus cleaner". Try on small inconspicuous area first.
Forum: RV-12/RV-12iS 08-08-2019, 08:00 PM
Replies: 22
Views: 3,438
Posted By Mich48041
I put one gallon into my vehicle to purge the...

I put one gallon into my vehicle to purge the line before filling cans for the airplane.
Forum: RV-12/RV-12iS 08-07-2019, 07:55 PM
Replies: 10
Views: 2,334
Posted By Mich48041
If each pair of Nord Lock washers is installed...

If each pair of Nord Lock washers is installed correctly with the beveled sides facing each other, it takes considerably more torque to loosen the bolts than it did to tighten them. They are not...
Forum: RV-12/RV-12iS 08-06-2019, 01:48 PM
Replies: 70
Views: 7,184
Posted By Mich48041
My early model iFly 740 does interface with the...

My early model iFly 740 does interface with the D-180 via a USB-Serial converter. I do not know if the new 470B has a serial output or not. I did not try connecting the 740 to the ELT. But I was...
Forum: Electrical Systems 08-03-2019, 02:55 PM
Replies: 35
Views: 2,042
Posted By Mich48041
Most builders are better off using one of Bob...

Most builders are better off using one of Bob Nuckolls' designs instead of
designing their own. Z-13/8 is Bob's favorite. Builders get satisfaction by using
their ingenuity to "improve" upon the...
Forum: Electrical Systems 08-03-2019, 12:29 PM
Replies: 35
Views: 2,042
Posted By Mich48041
Yes, almost. Add a switch to control the aux...

Yes, almost.
Add a switch to control the aux battery contactor.
Increase the wire size between the aux battery contactor and the starter contactor.
Make it the same size as on the main...
Forum: Electrical Systems 08-03-2019, 08:38 AM
Replies: 35
Views: 2,042
Posted By Mich48041
An E-Bus isn't really needed. Just arrange the...

An E-Bus isn't really needed. Just arrange the switches with important ones on
the left and not so important ones on the right side. When it is desired to shed
loads quickly, shut off the...
Forum: Electrical Systems 08-03-2019, 08:25 AM
Replies: 35
Views: 2,042
Posted By Mich48041
The fuse in the aux battery circuit could blow...

The fuse in the aux battery circuit could blow when trying to start the engine using the aux battery.
This will happen someday due to pilot error.
Prevent that by disabling the aux contactor during...
Forum: Electrical Systems 08-02-2019, 12:03 PM
Replies: 35
Views: 2,042
Posted By Mich48041
It is usually bad practice to wire fuses in...

It is usually bad practice to wire fuses in series. Sometimes a short circuit will
blow both fuses, even if one is much larger than the other. An exception is a
current limiter, which is very...
Forum: RV-12/RV-12iS 07-31-2019, 07:56 AM
Replies: 8
Views: 841
Posted By Mich48041
Most intermittent problems are due to bad...

Most intermittent problems are due to bad connections.
Unnecessary altitude encoder connections can be eliminated in your plane by bypassing the control board.
To do that, connect Pin 13 of the D-180...
Forum: RV-12/RV-12iS 07-30-2019, 11:25 AM
Replies: 9
Views: 1,213
Posted By Mich48041
Cut a piece of hinge and cut away part of a hing...

Cut a piece of hinge and cut away part of a hing barrel to make a hook for the hinge pin. See picture. This works best if the 90 degree "handle" of the hing pin is...
Forum: Electrical Systems 07-26-2019, 06:03 PM
Replies: 51
Views: 3,619
Posted By Mich48041
Here is a LINK...

Here is a LINK (http://forums.matronics.com/viewtopic.php?p=480365) to a thread describing one way to test an over-voltage module.
Forum: Electrical Systems 07-17-2019, 05:20 PM
Replies: 7
Views: 737
Posted By Mich48041
Several aircraft owners have reported that...

Several aircraft owners have reported that keeping a battery maintainer on the Odyssey PC680 does more harm than good. The battery will be happy if the plane is flown at least every couple of...
Forum: Electrical Systems 07-16-2019, 11:47 AM
Replies: 8
Views: 713
Posted By Mich48041
Use an automotive battery. Be careful not to...

Use an automotive battery.
Be careful not to reverse polarity.
Charge the battery when not powering the aircraft.
Forum: Electrical Systems 07-16-2019, 11:09 AM
Replies: 8
Views: 1,282
Posted By Mich48041
If you have crowbar over-voltage protection, a...

If you have crowbar over-voltage protection, a circuit breaker is needed for the alternator field. A fuse can be use if there is no crowbar device installed. An alternator disconnect switch is...
Forum: RV-12/RV-12iS 07-15-2019, 09:46 AM
Replies: 21
Views: 3,723
Posted By Mich48041
You are allowed to make changes to an E-LSA after...

You are allowed to make changes to an E-LSA after completing the 5 hour test phase, as long as the plane still meets the definition of LSA. So you may add IFR avionics to your E-LSA if desired.
Forum: Electrical Systems 07-09-2019, 09:48 AM
Replies: 9
Views: 637
Posted By Mich48041
I have hit bumps in turbulence that pulled more G...

I have hit bumps in turbulence that pulled more G force than any aerobatic maneuver. No contactors in the plane opened or closed.
Bob Nuckolls' POST...
Forum: RV-12/RV-12iS 07-09-2019, 08:29 AM
Replies: 44
Views: 7,501
Posted By Mich48041
The new canopy latch design locks the canopy in...

The new canopy latch design locks the canopy in the open position so that the canopy can not open more than a few inches. Somewhere in these forums is a link to a video showing the wind catching an...
Forum: Electrical Systems 07-09-2019, 06:11 AM
Replies: 14
Views: 4,273
Posted By Mich48041
Possible Part numbers SD-70 and SD-70J at...

Possible Part numbers SD-70 and SD-70J at Mouser
eBay has PS2 keyboard / mouse extension cable (6 pins)
Forum: Electrical Systems 07-08-2019, 08:46 PM
Replies: 6
Views: 502
Posted By Mich48041
If the alternator is putting out 14.6 volts and...

If the alternator is putting out 14.6 volts and if the alternator output is connected to the battery, then the battery IS being charged.
Forum: Electrical Systems 07-08-2019, 08:19 PM
Replies: 9
Views: 637
Posted By Mich48041
If a contactor has a drain hole, it should be at...

If a contactor has a drain hole, it should be at the bottom to prevent water from accumulating inside of the case.
Forum: Electrical Systems 07-02-2019, 08:31 PM
Replies: 10
Views: 871
Posted By Mich48041
Looking at the data sheet, the forward voltage...

Looking at the data sheet, the forward voltage drop will be more like 1 volt. I think that with a diode in the circuit, engine cranking will be degraded quite a bit. How about Bob Nuckolls' Z-31...
Forum: RV-12/RV-12iS 07-02-2019, 06:43 AM
Replies: 9
Views: 853
Posted By Mich48041
There have been other threads pertaining to this....

There have been other threads pertaining to this. A couple of builders said that it would have been easier to rip everything out and start over. If you do that, it would be plug and play (using...
Forum: RV-12/RV-12iS 06-28-2019, 03:15 PM
Replies: 8
Views: 2,092
Posted By Mich48041
I do not know if it is necessary or not, but I...

I do not know if it is necessary or not, but I put 1x2x0.63 inch aluminum
on the forward side of the instrument panel behind each grab handle base.
Yes, I removed top cover to gain access to the...
Forum: RV-12/RV-12iS 06-27-2019, 06:48 PM
Replies: 8
Views: 2,092
Posted By Mich48041
"Utility Pull" grab bar

"Utility Pull" grab bar for passenger mounted on right side of instrument panel.
Bulldog Hardware Part number: D-440, UPC 035061928765, 6.5" Black Utility Pull
I purchased it at Walmart $3. It is...
Forum: Electrical Systems 06-27-2019, 02:23 PM
Replies: 21
Views: 2,084
Posted By Mich48041
I agree with Charlie. All switches are capable...

I agree with Charlie. All switches are capable of carrying DC current. We just do not know how much current unless the switch manufacture publishes the DC rating. As a rule of thumb, a snap action...
Forum: Electrical Systems 06-26-2019, 12:02 PM
Replies: 21
Views: 2,084
Posted By Mich48041
Do not use switches whose current-carrying rivets...

Do not use switches whose current-carrying rivets go through plastic. That plastic will flow over time, loosening the rivets. That results in high resistance which makes heat and more resistance...
Forum: Electrical Systems 06-26-2019, 06:13 AM
Replies: 21
Views: 2,084
Posted By Mich48041
Like Charlie said, switches need a heavier load...

Like Charlie said, switches need a heavier load to burn away corrosion.
Switches that only carry low level signal current, should have gold plated contacts.
Switches that carry heavier current should...
Forum: RV-12/RV-12iS 06-26-2019, 05:32 AM
Replies: 2
Views: 549
Posted By Mich48041
The fuel sender should have a dedicated ground...

The fuel sender should have a dedicated ground wire connected to an airframe ground and a fuel sender mounting plate screw with star washer. The intermittent problem that you experienced is likely...
Forum: RV-12/RV-12iS 06-24-2019, 11:25 AM
Replies: 7
Views: 1,345
Posted By Mich48041
I assume that the aft window currently used is...

I assume that the aft window currently used is made of acrylic. Cement is available that is made specifically for acrylic. It will melt the acrylic and weld it together. A scrap piece of acrylic...
Forum: Electrical Systems 06-20-2019, 11:07 AM
Replies: 277
Views: 28,996
Posted By Mich48041
It is not a good idea to put over-current devices...

It is not a good idea to put over-current devices in series. Both could blow or trip, even if they have different current ratings.
Forum: Electrical Systems 06-18-2019, 06:26 AM
Replies: 24
Views: 2,008
Posted By Mich48041
I only install the needed pins. Do not know why...

I only install the needed pins. Do not know why filling empty holes would be advantageous.
Forum: RV-12/RV-12iS 06-15-2019, 12:12 PM
Replies: 9
Views: 960
Posted By Mich48041
If it doesn't shimmy, then it's OK. If it does...

If it doesn't shimmy, then it's OK. If it does shimmy, then tighten it up.
Forum: RV-12/RV-12iS 06-15-2019, 08:58 AM
Replies: 17
Views: 2,446
Posted By Mich48041
No, the stall warning is not removed. Keep both...

No, the stall warning is not removed. Keep both AOA and stall vane. The AOA audio starts ticking as stall is approached, kind of like Morse Code. As the AOA increases, so does the length of the...
Forum: RV-12/RV-12iS 06-15-2019, 07:42 AM
Replies: 17
Views: 2,446
Posted By Mich48041
Jim, the D-180 has the AOA feature. DOWNLOAD...

Jim, the D-180 has the AOA feature. DOWNLOAD (https://www.vansaircraft.com/wp-content/uploads/2019/01/Notification-2016-12-14.pdf) the instructions from Van's. The only thing that you need from the...
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