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Search: Posts Made By: Mich48041
Forum: RV-12/RV-12iS Yesterday, 07:20 PM
Replies: 2
Views: 100
Posted By Mich48041
Removing and reinstalling the fuel tank should...

Removing and reinstalling the fuel tank should not affect the calibration unless the float arm was bent.
Is the fuel level sender flange well grounded?
Forum: RV-12/RV-12iS 05-13-2021, 11:28 AM
Replies: 13
Views: 321
Posted By Mich48041
I searched for mich48041 and hints and found...

I searched for mich48041 and hints and found the...
Forum: RV-12/RV-12iS 05-13-2021, 11:09 AM
Replies: 5
Views: 846
Posted By Mich48041
I replaced the original instrument panel screws...

I replaced the original instrument panel screws with MS35206-228 Steel Pan
Head Phillips Screws, 6-32 Thread Size, 3/8" Long. The pan head is much more
resistant to stripping out with a Philips...
Forum: RV-12/RV-12iS 05-05-2021, 07:53 PM
Replies: 5
Views: 533
Posted By Mich48041
I have used thick axle grease to hold washers. ...

I have used thick axle grease to hold washers. Another trick that I have used is
to stick a very strong rare earth magnet onto the bolt head. Then washers will
stick to the bolt. I used a magnet...
Forum: RV-12/RV-12iS 05-01-2021, 10:37 AM
Replies: 23
Views: 1,945
Posted By Mich48041
You are correct. I was wrong and corrected my...

You are correct. I was wrong and corrected my post #15 above.
Forum: RV-12/RV-12iS 05-01-2021, 09:59 AM
Replies: 23
Views: 1,945
Posted By Mich48041
The point emphasized in the article is, "In...

The point emphasized in the article is,
"In general, unless max rate of climb is dramatically higher than max glide
rate of descent, you will have a lot of difficulties getting back to the...
Forum: RV-12/RV-12iS 05-01-2021, 09:21 AM
Replies: 23
Views: 1,945
Posted By Mich48041
There is a relevant article in the May 2020...

There is a relevant article in the May 2020 issue...
Forum: RV-12/RV-12iS 04-30-2021, 08:11 AM
Replies: 147
Views: 8,167
Posted By Mich48041
There seems to be a typo on page 2 of "Service...

There seems to be a typo on page 2 of "Service Letter 19-09-23". It says,
". . . we recommend that aircraft . . . turn off the high PRESSURE warning . . .
I believe that Van's meant to write, "turn...
Forum: Electrical Systems 04-29-2021, 05:10 PM
Replies: 55
Views: 6,723
Posted By Mich48041
What you need is an engine bus with no other...

What you need is an engine bus with no other loads on it.
Bob Nuckolls has a new electrical drawing called Z101B (http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z101B.pdf).
The engine bus is...
Forum: RV-12/RV-12iS 04-20-2021, 04:52 PM
Replies: 147
Views: 8,167
Posted By Mich48041
If you have burned leaded fuel in your plane, do...

If you have burned leaded fuel in your plane, do not transfer it into your car.
Even very small amounts of lead will ruin catalytic converters.
Forum: RV-12/RV-12iS 04-17-2021, 03:33 PM
Replies: 147
Views: 8,167
Posted By Mich48041
When fuel flow is reduced, fuel is exposed to...

When fuel flow is reduced, fuel is exposed to engine heat for longer time.
Forum: RV-12/RV-12iS 04-13-2021, 11:08 PM
Replies: 24
Views: 2,803
Posted By Mich48041
Have you checked for inlet air leaks?

Have you checked for inlet air leaks?
Forum: RV-12/RV-12iS 04-11-2021, 08:46 AM
Replies: 17
Views: 1,784
Posted By Mich48041
If the grip on fuse terminals is not strong...

If the grip on fuse terminals is not strong enough to prevent a fuse from falling out,
then the grip is not strong enough to provide a good electrical connection either.
Forum: Electrical Systems 04-08-2021, 04:13 AM
Replies: 7
Views: 423
Posted By Mich48041
Try ExpressPCB...

Try ExpressPCB (https://www.expresspcb.com/expresspcb-classic-pcb-layout-software/#wow-modal-id-1) classic. It is free but they will ask for your email address. It is intuitive and very easy to...
Forum: RV-12/RV-12iS 04-07-2021, 05:54 PM
Replies: 147
Views: 8,167
Posted By Mich48041
Here is an old picture showing gascolator...

Here is an old picture showing gascolator temperature.
I moved the thermocouple so that now it measures voltage regulator temperature.
The ammeter might have been in that location. The ammeter never...
Forum: RV-12/RV-12iS 04-07-2021, 11:17 AM
Replies: 147
Views: 8,167
Posted By Mich48041
THERMOCOUPLE

Piper J3, the Dynon D-180 has a thermocouple input on EFIS pins 27 & 28. If that input is free,
a type J thermocouple can be connected. Omega has part number WTJ-14-36...
Forum: RV-12/RV-12iS 04-06-2021, 08:23 AM
Replies: 76
Views: 21,042
Posted By Mich48041
See this post about the correct way to mount a...

See this post about the correct way to mount a reed switch.
https://vansairforce.net/community/showpost.php?p=1515954&postcount=14
Forum: RV-12/RV-12iS 04-06-2021, 08:20 AM
Replies: 15
Views: 3,594
Posted By Mich48041
A magnet is much more effective at closing a reed...

A magnet is much more effective at closing a reed switch if the magnet and reed switch
are mounted parallel with each other, NOT perpendicular as originally designed. The picture
below came from the...
Forum: RV-12/RV-12iS 04-05-2021, 03:48 AM
Replies: 12
Views: 1,087
Posted By Mich48041
Set the fuel cap on the pilot's seat.

Set the fuel cap on the pilot's seat.
Forum: Electrical Systems 04-02-2021, 09:33 AM
Replies: 28
Views: 3,974
Posted By Mich48041
Dual diode part number: 863-MBRF20L45CTG $1...

Dual diode part number: 863-MBRF20L45CTG $1 each. Buy one for each load. 10 amps max if kept cool.
Use heat conductive paste between diode and metal surface. Connect center pin to load.
Forum: RV-12/RV-12iS 03-30-2021, 08:31 PM
Replies: 8
Views: 778
Posted By Mich48041
Is it true that, worldwide, Rotax has sold more...

Is it true that, worldwide, Rotax has sold more aircraft engines than all of the other manufactures COMBINED?
Forum: Electrical Systems 03-30-2021, 11:10 AM
Replies: 3
Views: 306
Posted By Mich48041
I have APEM switch part number ISR3SAD600 (Mouser...

I have APEM switch part number ISR3SAD600 (Mouser 642-ISR3SAD6) and like it.https://www.mouser.com/images/apem/images/ITP_ISR3SAD600_t.JPG
Forum: Electrical Systems 03-23-2021, 05:33 PM
Replies: 6
Views: 658
Posted By Mich48041
There is a big chance of damaging avionics if...

There is a big chance of damaging avionics if battery polarity is reversed.
Forum: RV-12/RV-12iS 03-23-2021, 12:21 PM
Replies: 12
Views: 1,357
Posted By Mich48041
Lubricate the AST hinge pins and linkage pivot...

Lubricate the AST hinge pins and linkage pivot points. If the trim is still too sluggish, adjust the trim speed pot.
Consider replacing the Ducati regulator with eBay item number 233489024206 or...
Forum: Electrical Systems 03-06-2021, 02:26 PM
Replies: 5
Views: 812
Posted By Mich48041
The temperature probe should work without being...

The temperature probe should work without being grounded. But the installation manual says it should be grounded to the airframe. Perhaps for lightning protection? Maybe g3xpert will comment.
Forum: Electrical Systems 03-03-2021, 08:37 PM
Replies: 26
Views: 2,447
Posted By Mich48041
The strobe negative and positive power wires...

The strobe negative and positive power wires should be a twisted pair.
Try running the negative strobe wire all of the way to the alternator mounting bracket.
If nothing else solves the problem, try...
Forum: Electrical Systems 02-28-2021, 08:26 PM
Replies: 10
Views: 795
Posted By Mich48041
The screw is not part of the electrical current...

The screw is not part of the electrical current path. Current flows directly from the ring terminal to the capacitor terminal post.
If you use thread locker, use it sparingly. You might want to...
Forum: Electrical Systems 02-28-2021, 05:37 PM
Replies: 10
Views: 795
Posted By Mich48041
You could put a little dab of blue Loctite on the...

You could put a little dab of blue Loctite on the threads if the screw or wire is subject to vibration.
Forum: Electrical Systems 02-28-2021, 08:19 AM
Replies: 10
Views: 795
Posted By Mich48041
By load, do you mean electrical load? Not to...

By load, do you mean electrical load? Not to worry, one wire will carry the current. Notice that the grounded terminal only has one wire. The current through each capacitor terminal is equal. ...
Forum: Electrical Systems 02-26-2021, 03:42 PM
Replies: 32
Views: 1,840
Posted By Mich48041
Have you checked the voltage with a meter? The...

Have you checked the voltage with a meter? The problem could be failure of the charging system.
Voltage should be around 14. If less than 13 at cruise RPM, the charging system is definitely not...
Forum: Electrical Systems 02-20-2021, 08:11 PM
Replies: 28
Views: 2,472
Posted By Mich48041
Sharpie ink fades away and disappears after a few...

Sharpie ink fades away and disappears after a few years.
Forum: Electrical Systems 02-20-2021, 08:25 AM
Replies: 25
Views: 3,832
Posted By Mich48041
Reduce Charging Current

I am offering this circuit for your entertainment. I am not necessarily recommending
it because adding components increases the chances of failure.
EarthX recommends adding a diode to limit charging...
Forum: RV-12/RV-12iS 02-20-2021, 06:32 AM
Replies: 17
Views: 2,820
Posted By Mich48041
I installed the John Deere regulator 4 and a half...

I installed the John Deere regulator 4 and a half years ago with heat conductive paste, a cooling shroud and blast tube from the air duct. I monitor its temperature with a thermocouple. It rarely...
Forum: RV-12/RV-12iS 02-18-2021, 06:49 AM
Replies: 17
Views: 2,820
Posted By Mich48041
14.1 volts is fine. My Ducati regulator put out...

14.1 volts is fine. My Ducati regulator put out 13.8 before I replaced it with a John Deere.
Forum: RV-12/RV-12iS 02-13-2021, 05:06 PM
Replies: 10
Views: 2,049
Posted By Mich48041
Greg and Scott at Van's Aircraft monitor these...

Greg and Scott at Van's Aircraft monitor these forums. Perhaps they will do some
flight tests with different electrical loads while recording the regulator temperature.
Then we will have the facts...
Forum: RV-12/RV-12iS 02-13-2021, 03:32 AM
Replies: 10
Views: 2,049
Posted By Mich48041
It is true that there are shunt type voltage...

It is true that there are shunt type voltage regulators. But a shunt type can not
possibly be used with the Rotax iS. The Rotax iS generator output is rated at 420 watts.
A shunt type would need...
Forum: RV-12/RV-12iS 02-12-2021, 01:54 PM
Replies: 10
Views: 2,049
Posted By Mich48041
It will be easy enough to test. Put a...

It will be easy enough to test. Put a thermocouple on the voltage regulator and go fly.
Observe the thermocouple temperature first with a light electrical load, and then with
a heavy electrical...
Forum: RV-12/RV-12iS 02-12-2021, 11:39 AM
Replies: 189
Views: 49,300
Posted By Mich48041
The aft most holes in the nose gear leg were not...

The aft most holes in the nose gear leg were not aligned with holes in the bottom
of the fuselage. I had to elongate the holes in order to get the screws in.
The alignment problem might be due to...
Forum: RV-12/RV-12iS 02-12-2021, 09:05 AM
Replies: 10
Views: 2,049
Posted By Mich48041
The Rotax alternators are permanent magnet type. ...

The Rotax alternators are permanent magnet type. Thus they do not have field windings.
I can not believe that, "These regulators reject any unused electrical power
as heat." Van's must have been...
Forum: RV-12/RV-12iS 02-11-2021, 04:13 PM
Replies: 17
Views: 2,820
Posted By Mich48041
Search eBay for AM101406. Connect large yellow...

Search eBay for AM101406.
Connect large yellow wires from alternator to pins labeled "AC".
"B+" is output to aircraft main power bus.
L (Lamp) is not connected.
"IGW" connects to small yellow control...
Forum: RV-12/RV-12iS 02-11-2021, 02:55 PM
Replies: 17
Views: 2,820
Posted By Mich48041
No matter the make or model or mounting location,...

No matter the make or model or mounting location, the secret to long voltage
regulator life is to keep it cool. Be sure to use heat conductive paste between
metal parts of the regulator and the...
Forum: Electrical Systems 02-05-2021, 08:59 AM
Replies: 11
Views: 903
Posted By Mich48041
How often are the wings removed? You might...

How often are the wings removed? You might consider a service loop with soldered or crimped splices.
Forum: Electrical Systems 01-31-2021, 07:46 PM
Replies: 3
Views: 549
Posted By Mich48041
Extra connections mean more chances for...

Extra connections mean more chances for failures.
Future changes might not happen.
If they do, it is not that hard to reposition D-Sub pins.
Forum: RV-12/RV-12iS 01-27-2021, 09:02 AM
Replies: 8
Views: 2,158
Posted By Mich48041
Mark, You are right that the regulator has a...

Mark, You are right that the regulator has a connection to the Skyview.
But evidently there is a failure mode where the regulator has failed but tells the Skyview that it is OK.
I installed a John...
Forum: Electrical Systems 01-26-2021, 05:26 PM
Replies: 23
Views: 2,101
Posted By Mich48041
A bad ground can cause strange things to happen.

A bad ground can cause strange things to happen.
Forum: RV-12/RV-12iS 01-26-2021, 05:12 PM
Replies: 8
Views: 2,158
Posted By Mich48041
According to Van's electrical wiring diagram,...

According to Van's electrical wiring diagram, there is no connection between the
voltage regulator and the Skyview. And there is no Skyview input labeled VREG.
Could the VGEG indicator on your...
Forum: Electrical Systems 01-26-2021, 07:40 AM
Replies: 23
Views: 2,101
Posted By Mich48041
If there is no avionics bus, then it can not...

If there is no avionics bus, then it can not fail. Avionics in my plane are connected to the main bus.
Forum: Electrical Systems 01-24-2021, 08:50 AM
Replies: 23
Views: 6,049
Posted By Mich48041
Maybe you meant to write rectifier, not rheostat....

Maybe you meant to write rectifier, not rheostat. A rectifier and diode
are the same thing. A bridge diode contains 4 diodes inside of one case.
Forum: Electrical Systems 01-24-2021, 08:41 AM
Replies: 23
Views: 6,049
Posted By Mich48041
A rheostat and a bridge diode are two completely...

A rheostat and a bridge diode are two completely different components not
related at all, except for being electrical components. A rheostat is a variable
resistor used to restrict current flow. ...
Forum: RV-12/RV-12iS 01-20-2021, 11:08 AM
Replies: 3
Views: 977
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, 05:38 PM
Replies: 16
Views: 2,237
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, 08:58 PM
Replies: 25
Views: 3,848
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, 06:13 AM
Replies: 22
Views: 4,323
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, 07:59 PM
Replies: 7
Views: 645
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, 02:23 PM
Replies: 34
Views: 3,923
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, 07:30 AM
Replies: 2
Views: 815
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, 06:17 AM
Replies: 10
Views: 1,851
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, 06:36 PM
Replies: 4
Views: 640
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, 06:12 PM
Replies: 12
Views: 1,270
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, 01:30 PM
Replies: 44
Views: 5,609
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, 07:35 PM
Replies: 11
Views: 2,024
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, 04:35 PM
Replies: 7
Views: 794
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, 08:35 PM
Replies: 13
Views: 2,252
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, 05:22 PM
Replies: 7
Views: 979
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?
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