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Search: Posts Made By: Mich48041
Forum: Electrical Systems Yesterday, 08:34 PM
Replies: 11
Views: 418
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: 418
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: 9
Views: 1,564
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: 418
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: 1,900
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: 1,966
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: 2,121
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: 1,900
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: 644
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: 644
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: 1,210
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: 64
Views: 5,342
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: 1,966
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: 28,334
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: 1,600
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: 777
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: 1,081
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: 3,287
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: 2,264
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: 64
Views: 5,342
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: 1,930
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: 1,930
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: 1,930
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: 1,930
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: 1,930
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: 801
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: 1,169
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: 3,535
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: 709
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: 693
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: 1,232
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: 3,652
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: 623
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: 7,355
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: 4,225
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: 491
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: 623
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: 851
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: 815
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: 1,466
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: 1,466
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: 18
Views: 1,571
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: 18
Views: 1,571
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: 18
Views: 1,571
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: 543
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: 1,300
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: 28,360
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: 1,936
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: 947
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: 2,380
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: 2,380
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...
Forum: RV-12/RV-12iS 06-08-2019, 06:52 PM
Replies: 9
Views: 1,320
Posted By Mich48041
Make a "T" handle out of pipe fittings and screw...

Make a "T" handle out of pipe fittings and screw it into the bottom port. That handle gives you something to grab hold of to pull down.
Forum: Electrical Systems 06-08-2019, 03:42 AM
Replies: 2
Views: 521
Posted By Mich48041
Read THIS...

Read THIS (http://forums.matronics.com/viewtopic.php?p=364785&sid=d083e7f9f4492a78bc6576a8b483af99) thread on the AeroElectric List. Stein sells the pins.
Forum: RV-12/RV-12iS 06-03-2019, 05:33 PM
Replies: 35
Views: 6,492
Posted By Mich48041
The switch to 100LL is likely unrelated. Chances...

The switch to 100LL is likely unrelated. Chances are that the fuel pressure is not really low. Instead the fuel pressure sensor is inaccurate. Verify the fuel pressure before blaming the fuel or...
Forum: RV-12/RV-12iS 06-02-2019, 06:17 PM
Replies: 16
Views: 1,757
Posted By Mich48041
Right on Mike M. In lieu of using a jumper from...

Right on Mike M.
In lieu of using a jumper from regulator terminal B to C, instead use an inline fuse and switch between terminals B and C. Mount the switch on the instrument panel. In case of...
Forum: RV-12/RV-12iS 05-31-2019, 09:41 PM
Replies: 4
Views: 856
Posted By Mich48041
It depends on how much you trust the work of the...

It depends on how much you trust the work of the builder. Does he have enough confidence in his work to test fly the plane? Everyone makes mistakes. Another set of eyes might find them.
Forum: RV-12/RV-12iS 05-31-2019, 02:08 PM
Replies: 16
Views: 1,757
Posted By Mich48041
I never said that the plans called for putting a...

I never said that the plans called for putting a jumper wire between regulator terminals B & C. But some RV-12 owners have done it after blowing the fuse. My post was meant to discourage others...
Forum: RV-12/RV-12iS 05-31-2019, 11:38 AM
Replies: 16
Views: 1,757
Posted By Mich48041
ERROR CHAIN

Aviation magazines have published articles about an "Error Chain" leading to an accident. The pilot ignores just one minor problem that sets up an accident when combined with other unexpected...
Forum: Electrical Systems 05-31-2019, 07:11 AM
Replies: 37
Views: 3,202
Posted By Mich48041
Does the master switch also control the...

Does the master switch also control the alternator? If it does, then I agree with Butch. If the master switch does not control the alternator, and the alternator remains turned on, then the...
Forum: RV-12/RV-12iS 05-31-2019, 06:51 AM
Replies: 16
Views: 1,757
Posted By Mich48041
Rich, yes, you are right. I forgot about the...

Rich, yes, you are right. I forgot about the fuse.
Forum: RV-12/RV-12iS 05-30-2019, 06:32 PM
Replies: 16
Views: 1,757
Posted By Mich48041
Keep in mind that the master switch turns the...

Keep in mind that the master switch turns the regulator on or off. If terminal "C" is jumped to terminal "B", then there is no way to shut off electrical power while flying. If there is smoke in...
Forum: RV-12/RV-12iS 05-28-2019, 07:14 AM
Replies: 3
Views: 805
Posted By Mich48041
Bending the stall vane down will delay the...

Bending the stall vane down will delay the relative wind from getting under it and lifting it. Sometimes bending the vane down causes it to bend upwards inside of the wing, thus contacting the...
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