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Search: Posts Made By: Mich48041
Forum: RV-12/RV-12iS 01-20-2021, 12:08 PM
Replies: 3
Views: 397
Posted By Mich48041
Nord Lock washers are used in pairs. Make sure...

Nord Lock washers are used in pairs. Make sure they are orientated correctly.
Forum: Electrical Systems 01-19-2021, 06:38 PM
Replies: 13
Views: 770
Posted By Mich48041
A battery contactor and starter contactor need to...

A battery contactor and starter contactor need to be on the forward side of the firewall.
An ANL or similar current limiter is needed for the alternator "B" lead, but it can be located either on...
Forum: RV-12/RV-12iS 01-18-2021, 09:58 PM
Replies: 25
Views: 2,096
Posted By Mich48041
I read on Vansairforce about a RV-12 accident...

I read on Vansairforce about a RV-12 accident caused by a distracted pilot who forgot to latch the canopy prior to takeoff.
The RV-12 hit the runway while the pilot was trying to latch the...
Forum: Electrical Systems 01-18-2021, 07:13 AM
Replies: 22
Views: 2,823
Posted By Mich48041
The way permanent-magnet alternator regulators...

The way permanent-magnet alternator regulators work is by opening the
alternator's output with a solid-state switch for part of the AC sinewave.
Forum: Electrical Systems 01-17-2021, 08:59 PM
Replies: 7
Views: 320
Posted By Mich48041
Many aircraft do not have an avionics bus. Then...

Many aircraft do not have an avionics bus.
Then there is no switch or relay or contactor to fail.
Forum: Electrical Systems 01-14-2021, 03:23 PM
Replies: 32
Views: 1,885
Posted By Mich48041
If the fuse blows, how do you know which wire or...

If the fuse blows, how do you know which wire or load caused it?
Troubleshooting intermittent problems can be very frustrating.
Make it easier by having one fuse for each load.
Forum: RV-12/RV-12iS 01-14-2021, 08:30 AM
Replies: 2
Views: 387
Posted By Mich48041
Correct. Those rivets are not structural. All...

Correct. Those rivets are not structural. All they have to do is keep the nutplates from falling out when the screws are tightened.
Consider using blue Loctite thread locker instead of replacing...
Forum: RV-12/RV-12iS 01-13-2021, 07:17 AM
Replies: 10
Views: 1,077
Posted By Mich48041
I agree with Mike Miller and Scott. I converted...

I agree with Mike Miller and Scott. I converted Mike's picture to text:
LP3-F1G121R Spar Pin Indicator/Button
K2ABNPCCFA Master Sw DPDT
K2ABHPCABA Avionics, Nav/Strobc. A/P Sw's...
Forum: Electrical Systems 01-09-2021, 07:36 PM
Replies: 4
Views: 299
Posted By Mich48041
If the LED does not have an internal LED, one...

If the LED does not have an internal LED, one needs to be installed in series.
An online LED Resistor Calculator (https://ohmslawcalculator.com/led-resistor-calculator) will come in handy.
You need...
Forum: Electrical Systems 01-09-2021, 07:12 PM
Replies: 11
Views: 549
Posted By Mich48041
It looks like current through the zener diode is...

It looks like current through the zener diode is limited by the 10 amp fuse.
Forum: Electrical Systems 01-09-2021, 02:30 PM
Replies: 35
Views: 2,942
Posted By Mich48041
The drawing that you attached has a risk. If the...

The drawing that you attached has a risk. If the alternator shorts out and blows the
ANL fuse, then the whole electrical system fails (no battery backup).
500 RV-12s are flying with the alternator...
Forum: RV-12/RV-12iS 01-08-2021, 08:35 PM
Replies: 11
Views: 1,240
Posted By Mich48041
Per Van's service bulletin 16-05-26...

Per Van's service bulletin 16-05-26 (https://www.vansaircraft.com/service-information-and-revisions/sb-16-05-26/)
Data plate must include country of OEM per ASTM F2745-11, Sect. 6.3.2
E-LSA and S-LSA...
Forum: Electrical Systems 01-07-2021, 05:35 PM
Replies: 7
Views: 433
Posted By Mich48041
Do NOT connect 12 volts. The pitch trim...

Do NOT connect 12 volts. The pitch trim controller is a 5 volt system.
The Ray Allen G405 stick grip grounds the RED (Down) and GREEN (Up)
wires when the switches are pressed. Measure the voltage...
Forum: RV-12/RV-12iS 01-01-2021, 09:35 PM
Replies: 14
Views: 1,293
Posted By Mich48041
According to my notes, 3.2 volts on Dynon D-180...

According to my notes, 3.2 volts on Dynon D-180 EMS Pin 6 = 30psi.
Disconnect the wht/yel wire from the oil pressure sender and connect it to
3.2 volts positive (two flashlight batteries in series). ...
Forum: RV-12/RV-12iS 01-01-2021, 06:22 PM
Replies: 7
Views: 674
Posted By Mich48041
Check the pivot points at the forward end of the...

Check the pivot points at the forward end of the canopy.
Are they too loose?
Forum: Electrical Systems 12-27-2020, 07:23 PM
Replies: 35
Views: 2,942
Posted By Mich48041
You can use either one. I prefer fuses because...

You can use either one. I prefer fuses because they are the weak link in the
circuit and will not fail to open when overloaded. Circuit breakers are mechanical
devices that can fail. I had a...
Forum: Electrical Systems 12-27-2020, 08:02 AM
Replies: 2
Views: 268
Posted By Mich48041
Unlike lead acid batteries, Lithium batteries...

Unlike lead acid batteries, Lithium batteries will accept whatever charging
current that your alternator can put out. If the battery is discharged, then
the charging current will probably be too...
Forum: Electrical Systems 12-26-2020, 06:36 PM
Replies: 35
Views: 2,942
Posted By Mich48041
You need one ANL (or other brand) fuse located at...

You need one ANL (or other brand) fuse located at the starter contactor.
This fuse should NOT carry starter current, only current from the alternator.
The fuse should be big enough so that it will...
Forum: Electrical Systems 12-18-2020, 09:25 PM
Replies: 9
Views: 427
Posted By Mich48041
The rule of thumb is to ground a shield at only...

The rule of thumb is to ground a shield at only one end. However,
manufacturers instructions take precedence over rules of thumb.
They have done testing and know the best way to wire their products.
Forum: RV-12/RV-12iS 12-14-2020, 02:16 PM
Replies: 4
Views: 756
Posted By Mich48041
Looking at the schematic, it seems that the...

Looking at the schematic, it seems that the engine must be running in order
for the 30 amp fuse to glow. As far as I know, all RV-12s kits have the "Lit"
type fuses. Mine does. Try connecting...
Forum: RV-12/RV-12iS 12-11-2020, 09:34 PM
Replies: 4
Views: 705
Posted By Mich48041
Van's sells them. Give them a call.

Van's sells them. Give them a call.
Forum: RV-12/RV-12iS 12-08-2020, 04:02 PM
Replies: 11
Views: 1,487
Posted By Mich48041
If it is not broke, don't fix it.

If it is not broke, don't fix it.
Forum: RV-12/RV-12iS 12-07-2020, 06:22 PM
Replies: 6
Views: 3,325
Posted By Mich48041
Yes, Walter Tondu does. You can download it from...

Yes, Walter Tondu does. You can download it from HERE (http://rv7-a.com/n447rv_documents.htm).
His user name is "walter'. Here is the weight & balance THREAD...
Forum: RV-12/RV-12iS 12-06-2020, 09:07 PM
Replies: 37
Views: 3,498
Posted By Mich48041
You are correct that most of the RV-12 is wired...

You are correct that most of the RV-12 is wired with Van's wire harnesses.
But Dynon components must be wired per Dynon manuals, especially the Dynon network.
Forum: RV-12/RV-12iS 12-06-2020, 07:41 PM
Replies: 37
Views: 3,498
Posted By Mich48041
Open circuits are much more common than shorted...

Open circuits are much more common than shorted circuits. But in either case,
substituting another cable will tell you if the existing cable is good or bad.
You can buy one from DYNON...
Forum: Electrical Systems 12-06-2020, 04:58 PM
Replies: 17
Views: 1,372
Posted By Mich48041
Be aware that if completely discharged, EarthX...

Be aware that if completely discharged, EarthX batteries need to be large
enough to accept the full output of the alternator. And an alternator needs
proper cooling if operated at maximum capacity...
Forum: Electrical Systems 12-06-2020, 09:16 AM
Replies: 17
Views: 1,372
Posted By Mich48041
From the earthX website: Can I hook an EarthX...

From the earthX website:
Can I hook an EarthX battery in parallel or series with a lead acid battery?
No. The voltages are not the same and you will over charge the lead acid battery and drain the...
Forum: RV-12/RV-12iS 12-06-2020, 09:00 AM
Replies: 4
Views: 949
Posted By Mich48041
I sent you a PM

I sent you a PM
Forum: Electrical Systems 12-01-2020, 03:52 AM
Replies: 3
Views: 306
Posted By Mich48041
I don't know if this is the problem or not, but...

I don't know if this is the problem or not, but it will not hurt to check the wing-root electrical connection,
especially if it is the original design that depends on rivets through plastic to...
Forum: Electrical Systems 11-30-2020, 07:50 PM
Replies: 3
Views: 306
Posted By Mich48041
Does your RV-12 have a potentiometer for...

Does your RV-12 have a potentiometer for controlling the brightness?
Is there a cockpit light? If so, does it work OK?
Forum: Electrical Systems 11-30-2020, 06:07 PM
Replies: 7
Views: 539
Posted By Mich48041
Mouser.com has diodes. Part number...

Mouser.com has diodes. Part number 863-MBRF20L45CTG (https://www.mouser.com/ProductDetail/ON-Semiconductor/MBRF20L45CTG?qs=gJ%252BTA%252BwkLL4Mlnn%2F3yXrDw%3D%3D) costs $0.83
Voltage drop while...
Forum: COMM 11-27-2020, 12:14 PM
Replies: 5
Views: 807
Posted By Mich48041
Found this old thread about the Bose A20...

Found this old thread about the Bose A20 Headset
https://vansairforce.com/community/showthread.php?t=60743
Forum: RV-12/RV-12iS 11-25-2020, 08:20 PM
Replies: 16
Views: 1,780
Posted By Mich48041
Many (most?) RV-12s have a faston splice in the...

Many (most?) RV-12s have a faston splice in the ignition wires on the forward side of the firewall.
I think that is what JBPILOT was referring to.
Find those splices, unplug and plug together those...
Forum: Electrical Systems 11-25-2020, 05:24 AM
Replies: 77
Views: 17,499
Posted By Mich48041
If the voltage is above 14, then the charging...

If the voltage is above 14, then the charging system is working fine.
If you have any more problems starting the engine, the next things to check are
wire terminations, battery contactor, starter...
Forum: Electrical Systems 11-22-2020, 08:52 PM
Replies: 12
Views: 1,881
Posted By Mich48041
David, did you fix the master contractor problem?

David, did you fix the master contractor problem?
Forum: RV-12/RV-12iS 11-22-2020, 08:45 AM
Replies: 37
Views: 3,498
Posted By Mich48041
Lon, I was thinking of the ADAHRS end of the...

Lon, I was thinking of the ADAHRS end of the cable when I posted above. But
you are correct that the problem could be at the forward end of the cable. Do
not assume that the mechanic carefully...
Forum: RV-12/RV-12iS 11-21-2020, 06:16 PM
Replies: 37
Views: 3,498
Posted By Mich48041
The first place that I would check is at the...

The first place that I would check is at the ADAHRS. Like Bob Leffler wrote,
make sure the D-Sub pins are seated properly. Unplugging and plugging in a
few times will wear away corrosion. Since...
Forum: RV-12/RV-12iS 11-20-2020, 08:44 PM
Replies: 37
Views: 3,498
Posted By Mich48041
The failures are likely to be caused by a bad...

The failures are likely to be caused by a bad connection(s). I suggest that
you take every connection apart and inspect it, then put it back together.
Forum: Electrical Systems 11-13-2020, 02:45 PM
Replies: 12
Views: 1,881
Posted By Mich48041
kaweeka, did you find the problem? Was it the...

kaweeka, did you find the problem? Was it the master switch?
Forum: RV-12/RV-12iS 11-11-2020, 06:33 PM
Replies: 20
Views: 4,039
Posted By Mich48041
Bill, welcome to VansAirforce.

Bill, welcome to VansAirforce.
Forum: Electrical Systems 11-08-2020, 01:05 PM
Replies: 12
Views: 1,881
Posted By Mich48041
mfleming suggested another good test. Connect...

mfleming suggested another good test. Connect the red voltmeter probe to
the battery contactor small terminal and the black probe to ground. The meter
should read battery voltage with the master...
Forum: Electrical Systems 11-08-2020, 11:39 AM
Replies: 29
Views: 3,074
Posted By Mich48041
There is no such thing as a voltage spike during...

There is no such thing as a voltage spike during engine starting. That is an old
wives tale. The voltage SAGS during engine starting. That voltage sag did
cause transistors to fail back in the...
Forum: Electrical Systems 11-08-2020, 11:26 AM
Replies: 12
Views: 1,881
Posted By Mich48041
Connect a voltmeter to battery contactor with red...

Connect a voltmeter to battery contactor with red probe on battery terminal
and black lead on small terminal. Turn on master switch and observe voltage.
If voltage across contactor terminals is...
Forum: RV-12/RV-12iS 11-08-2020, 11:12 AM
Replies: 7
Views: 1,269
Posted By Mich48041
All LED lights need a series resistor to limit...

All LED lights need a series resistor to limit the current. LED lights that are
advertised to to work on 12 volts have an internal resistor that you might not
be able to see. If you want the LED...
Forum: RV-12/RV-12iS 11-07-2020, 12:21 PM
Replies: 4
Views: 1,329
Posted By Mich48041
The Org/Brn wire connects to the fuel level...

The Org/Brn wire connects to the fuel level sender.
The black wire is a ground wire and it connects to a fuel level sender mounting screw.
Use a star type lock washer to achieve a good electrical...
Forum: RV-12/RV-12iS 11-05-2020, 09:17 PM
Replies: 25
Views: 4,066
Posted By Mich48041
Mel, is that true?

Mel, is that true?
Forum: Electrical Systems 11-04-2020, 11:53 AM
Replies: 20
Views: 2,840
Posted By Mich48041
If the voltage remains constant at 14.2 volts,...

If the voltage remains constant at 14.2 volts, then the charging system is
working perfectly. Any fluctuation of current is due to either an indication
problem (likely) or a fluctuating load...
Forum: RV-12/RV-12iS 11-02-2020, 06:19 PM
Replies: 5
Views: 1,332
Posted By Mich48041
Thanks Scott. I assume from your reply that the...

Thanks Scott. I assume from your reply that the engine does not need to be
running to view engine parameters on the Skyview display. The only
requirements are that the Skyview is on and the lane...
Forum: RV-12/RV-12iS 11-02-2020, 12:28 PM
Replies: 5
Views: 1,332
Posted By Mich48041
CAN BUS

A friend wants to start his 912iS engine for the first time but is afraid to
because all of engine parameters have a red X on the Skyview HDX display.
Does the engine have to be running in order to...
Forum: RV-12/RV-12iS 11-02-2020, 10:29 AM
Replies: 3
Views: 981
Posted By Mich48041
Yes, RV-12 owners have inadvertently shorted the...

Yes, RV-12 owners have inadvertently shorted the wire going to regulator terminal C and
have blown the 1 amp fuse. You are correct that terminal C gets voltage from the master switch.
Do NOT jumper...
Forum: RV-12/RV-12iS 10-27-2020, 03:34 PM
Replies: 13
Views: 2,691
Posted By Mich48041
What is a circlip?

What is a circlip?
Forum: RV-12/RV-12iS 10-21-2020, 01:30 PM
Replies: 25
Views: 9,586
Posted By Mich48041
Tires absorb some of the shock when landing. ...

Tires absorb some of the shock when landing. Correct tire pressure is especially important on the nose wheel.
Forum: RV-12/RV-12iS 10-16-2020, 06:23 PM
Replies: 3
Views: 1,348
Posted By Mich48041
It is no bid deal. If you can not find ready...

It is no bid deal. If you can not find ready made jumpers, just make your own.
Forum: Electrical Systems 10-16-2020, 05:52 AM
Replies: 3
Views: 665
Posted By Mich48041
Honeywell AML34

alliedelec.com
-
https://www.mouser.com/Search/Refine?Keyword=AML34
-
https://www.digikey.com/en/products/detail/honeywell-sensing-and-productivity-solutions/AML34FBA4AC01/1248773
Forum: Electrical Systems 10-13-2020, 10:37 AM
Replies: 17
Views: 1,461
Posted By Mich48041
Split lock washers are not really lock washers. ...

Split lock washers are not really lock washers. Nord Lock did vibration testing of
various lock washers. Split ring washers actually cause a fastener to loosen
quicker than no washer at all. I...
Forum: Electrical Systems 10-11-2020, 07:34 PM
Replies: 7
Views: 967
Posted By Mich48041
R1 limits current in case wire shorts to...

R1 limits current in case wire shorts to ground.
R2 pulls voltage low when circuit is open.
Diode shorts out induced voltage spikes if there are any.
Starter solenoid will not be affected.
Forum: Electrical Systems 10-08-2020, 08:49 PM
Replies: 6
Views: 838
Posted By Mich48041
It is not a good idea to have fuses in series. A...

It is not a good idea to have fuses in series. A hard short circuit can blow both the load
fuse and the main fuse or circuit breaker. I would keep the wire short (less than six inches)
between the...
Forum: Electrical Systems 10-01-2020, 09:52 PM
Replies: 4
Views: 998
Posted By Mich48041
The fuse should be located at the battery end of...

The fuse should be located at the battery end of the B
lead to protect the battery and B lead from short circuits.
An alternator can not produce much more than its rated output.
An alternator is self...
Forum: Electrical Systems 09-30-2020, 01:14 PM
Replies: 8
Views: 1,084
Posted By Mich48041
AGM batteries like yours normally do not need to...

AGM batteries like yours normally do not need to be charged if the aircraft is flown once per month or so.
The problem with a 14 volt power supply is that the voltage does not taper off over time.
A...
Forum: Electrical Systems 09-28-2020, 07:12 PM
Replies: 10
Views: 1,813
Posted By Mich48041
John S You are right. The avionics master switch...

John S
You are right. The avionics master switch is an unnecessary failure point.
Read what Bob Nuckolls has to say about...
Forum: Electrical Systems 09-28-2020, 07:10 PM
Replies: 10
Views: 1,813
Posted By Mich48041
Larry, In case of smoke or fire in the cockpit,...

Larry,
In case of smoke or fire in the cockpit, the master can be shut off.
In case of an imminent forced landing, shutting off the master will minimize the chances of fire after a collision.
A...
Forum: Electrical Systems 09-28-2020, 04:53 AM
Replies: 4
Views: 684
Posted By Mich48041
Ninety nine percent of RV-12s do not have an...

Ninety nine percent of RV-12s do not have an E-Bus.
Your electrical system is unique. Only the builder knows how it was wired.
Forum: Electrical Systems 09-27-2020, 06:42 PM
Replies: 4
Views: 684
Posted By Mich48041
A diode in the circuit will drop up to one volt...

A diode in the circuit will drop up to one volt or so depending
on the type of diode and the current flowing through it.
Forum: RV-12/RV-12iS 09-26-2020, 01:15 PM
Replies: 19
Views: 3,734
Posted By Mich48041
I would not do it. What will hold the oil cooler...

I would not do it. What will hold the oil cooler in position?
What about carburetor ice?
What about other things that can go wrong that nobody knows about until experimenting?
Sometimes it is easier...
Showing results 1 to 64 of 500

 
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