VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > Search Forums
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Showing results 1 to 62 of 500
Search took 0.18 seconds.
Search: Posts Made By: Mich48041
Forum: RV-12 Today, 05:36 PM
Replies: 13
Views: 433
Posted By Mich48041
You will soon get used to the castering nose...

You will soon get used to the castering nose wheel. The faster you taxi, the easier it is. It sorta reminds me of a tail wheel. You have to think ahead.
Forum: RV-12 Today, 05:31 PM
Replies: 13
Views: 433
Posted By Mich48041
Ask that experienced 15K hour instructor how many...

Ask that experienced 15K hour instructor how many long cross country flights that he has flown in the RV-12. I suspect none. I flew my RV-12 from Michigan to Dallas TX and back. A friend has flown...
Forum: Electrical Systems Yesterday, 08:27 AM
Replies: 2
Views: 248
Posted By Mich48041
Anything above 13 could eventually charge a 12...

Anything above 13 could eventually charge a 12 volt battery, but could take many days to do so. In order to recharge a battery in reasonable amount of time, the bare minimum voltage should be at...
Forum: Electrical Systems 11-18-2018, 03:50 PM
Replies: 2
Views: 132
Posted By Mich48041
Jim, here are a couple of ideas for future...

Jim, here are a couple of ideas for future articles.
1. How to troubleshoot open and high resistance circuits.
2. How to troubleshoot shorted circuits.
Many people do not know the importance of...
Forum: Electrical Systems 11-18-2018, 01:56 PM
Replies: 2
Views: 132
Posted By Mich48041
30 amps is fine for a small PM alternator but not...

30 amps is fine for a small PM alternator but not for larger alternators.
A quick search on eBay and Amazon for "ammeter" results in some inexpensive digital meters with included shunts. But who...
Forum: RV-12 11-18-2018, 01:24 PM
Replies: 9
Views: 826
Posted By Mich48041
Henry, your intended wiring changes are doable. ...

Henry, your intended wiring changes are doable. Just be careful how you wire the switch. It should be completely disconnected from Van's circuit board. The servo motor should connect to the switch...
Forum: RV-12 11-18-2018, 08:36 AM
Replies: 9
Views: 826
Posted By Mich48041
The most likely place for a short to ground is in...

The most likely place for a short to ground is in the tail cone where the trim servo cable passes over a J-Stiffener. If that is the case, then installing a Ray Allen trim control will not help.
Forum: RV-12 11-17-2018, 09:17 PM
Replies: 9
Views: 826
Posted By Mich48041
Jim, judging by the AV-50000A, Henry has a...

Jim, judging by the AV-50000A, Henry has a Skyview, not a D-180. Installing the Ray Allen trim speed controller would be different in his RV-12, maybe even easier than for a D-180 system.
Forum: RV-12 11-17-2018, 07:21 PM
Replies: 9
Views: 826
Posted By Mich48041
Try disconnecting the Auto Pilot D-Sub connector...

Try disconnecting the Auto Pilot D-Sub connector from the AV-50000A to see if the short circuit goes away.
Forum: RV-12 11-17-2018, 06:57 PM
Replies: 9
Views: 826
Posted By Mich48041
Take one of those blown fuses and connect two...

Take one of those blown fuses and connect two wires to it, one on each leg. Connect those two wires to a low wattage (10 or less) automotive incandescent indicator lamp. If the lamp illuminates,...
Forum: Electrical Systems 11-16-2018, 09:59 PM
Replies: 41
Views: 2,333
Posted By Mich48041
Bob N's intent for the "E" in E-Bus stands for...

Bob N's intent for the "E" in E-Bus stands for Endurance, not emergency and not essential. In fact, putting all essential loads on a separate bus that is not as robust as the main power bus could...
Forum: Electrical Systems 11-15-2018, 05:50 PM
Replies: 6
Views: 663
Posted By Mich48041
Craig, is there a voltage-spike-protection diode...

Craig, is there a voltage-spike-protection diode connected across the starter contactor? Another possibility is a bad connection in the charging system that causes unstable voltage or voltage...
Forum: RV-12 11-15-2018, 01:16 PM
Replies: 15
Views: 857
Posted By Mich48041
The main difference for you is that if the plane...

The main difference for you is that if the plane is registered as E-AB, you must hire an A&P to do the annual inspection (unless the builder does it). If it is registered as E-LSA, then you can do...
Forum: Electrical Systems 11-14-2018, 12:41 PM
Replies: 12
Views: 567
Posted By Mich48041
Make your own PWM fan speed controller using a...

Make your own PWM fan speed controller using a TC648 (http://ww1.microchip.com/downloads/en/DeviceDoc/21448D.pdf)
Forum: Electrical Systems 11-14-2018, 12:35 PM
Replies: 12
Views: 567
Posted By Mich48041
14.5 volts minus 4.5V fan = 10 volts dropped by...

14.5 volts minus 4.5V fan = 10 volts dropped by resistor.
10 volts / 0.100 amps = 100 ohm resistor
The resistor will get hot if it is low wattage.
How about 5 watt rating or more?
Or search Amazon or...
Forum: RV-12 11-13-2018, 09:03 AM
Replies: 14
Views: 2,005
Posted By Mich48041
Below is a quote from page 2-2 of the D-180...

Below is a quote from page 2-2 of the D-180 installation manual. I suggest that ALL electrical loads be turned on during this test. Make sure the airframe ground connection is tight and that there...
Forum: RV-12 11-11-2018, 10:16 AM
Replies: 10
Views: 841
Posted By Mich48041
Van's Skyview schematic shows 12 volts connected...

Van's Skyview schematic shows 12 volts connected to the oil pressure sender.
However, Dynon's website seems to indicate 5 volts.
I would try 5 volts to see if the sensor works better.
5 volts are...
Forum: RV-12 11-10-2018, 06:58 PM
Replies: 10
Views: 841
Posted By Mich48041
I do not see a 200 ohm resistor on Van's Skyview...

I do not see a 200 ohm resistor on Van's Skyview schematic.
Brent, does your oil pressure sender have 3 wires?
If so, is one of them securely grounded?
Forum: Electrical Systems 11-10-2018, 12:26 PM
Replies: 5
Views: 598
Posted By Mich48041
Quote from AC 43.131B...

Quote from AC 43.131B (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/99C827DB9BAAC81B86256B4500596C4E?OpenDocument) chapter 8 paragraph 31 page 8-19
b. Routing. Make...
Forum: RV-12 11-04-2018, 06:25 PM
Replies: 4
Views: 466
Posted By Mich48041
Are you sure that 8130-6 is the correct form? ...

Are you sure that 8130-6 is the correct form? Mel?
Forum: RV-12 11-02-2018, 07:35 PM
Replies: 12
Views: 1,567
Posted By Mich48041
You can register your new plane E-LSA and still...

You can register your new plane E-LSA and still make changes after getting the airworthiness certificate and flying off the 5 hour test phase. Since you will likely install Dynon Avionics, building...
Forum: RV-12 10-31-2018, 06:48 PM
Replies: 28
Views: 7,211
Posted By Mich48041
My philosophy is, do what it best in the long...

My philosophy is, do what it best in the long run, not what is easiest. Sometimes it is easier to go ahead and do it the hard way to start with.
Forum: Electrical Systems 10-31-2018, 10:01 AM
Replies: 41
Views: 2,333
Posted By Mich48041
Some builders connect many more loads to the...

Some builders connect many more loads to the E-Bus than what Bob N had envisioned. Those builders should increase the E-Bus fuse to 30 amps or replace it with a 20AWG fuselink.
There is lots of...
Forum: RV-12 10-30-2018, 01:28 PM
Replies: 13
Views: 1,197
Posted By Mich48041
There are at least two ways to electrically...

There are at least two ways to electrically damage expensive avionics:
Connect too high of voltage.
Reverse battery voltage. Easy to do if using jumper cables.
All three of the responses that you...
Forum: Electrical Systems 10-30-2018, 10:54 AM
Replies: 19
Views: 1,416
Posted By Mich48041
Thanks Dan, No, I do not plan to make a detailed...

Thanks Dan,
No, I do not plan to make a detailed schematic of Carl's drawing. He has done that and makes it available if asked. There are lots of ways to wire an airplane. Some ways have an...
Forum: Electrical Systems 10-29-2018, 08:48 PM
Replies: 41
Views: 2,333
Posted By Mich48041
This is an example of why two fuses should not be...

This is an example of why two fuses should not be connected in series. You never know which one (or both) will blow. If two fuses must be wired in series, then the main fuse should be several times...
Forum: Electrical Systems 10-29-2018, 08:31 PM
Replies: 19
Views: 1,416
Posted By Mich48041
I have redrawn Carl's electrical drawing to make...

I have redrawn Carl's electrical drawing to make it easier to understand. My apologies to Carl if there is an error(s). To simplify the drawing, I have left out many details like fuses and circuit...
Forum: Electrical Systems 10-28-2018, 08:17 AM
Replies: 19
Views: 1,416
Posted By Mich48041
Bob N. has stated that the purpose of the...

Bob N. has stated that the purpose of the Endurance Bus is not for redundancy, but rather to reduce pilot workload in case the alternator fails when IFR. But it still requires two switches to be...
Forum: Electrical Systems 10-26-2018, 07:23 PM
Replies: 5
Views: 378
Posted By Mich48041
Check all of the electrical connections on the...

Check all of the electrical connections on the ammeter shunt to be sure that they are tight. While you are at it, might as well check electrical connections in the charging system also.
Forum: Electrical Systems 10-24-2018, 07:18 PM
Replies: 12
Views: 991
Posted By Mich48041
Based on what I have read on various forums,...

Based on what I have read on various forums, trickle chargers do more harm than good.
Forum: RV-12 10-21-2018, 06:29 PM
Replies: 12
Views: 3,700
Posted By Mich48041
Download THIS...

Download THIS (https://drive.google.com/file/d/0B7ZTG2VpCuDRYWU0MzZjYTQtYmJlNy00YTY1LWEzNjktNTU3ZTQyNzUxMzg0/edit?usp=sharing) spreadsheet. Change numbers in yellow cells only. It looks like you...
Forum: RV-12 10-19-2018, 09:53 AM
Replies: 56
Views: 15,153
Posted By Mich48041
Good Job Mike. Are you going to manufacture and...

Good Job Mike. Are you going to manufacture and sell them?
Forum: Electrical Systems 10-18-2018, 10:56 AM
Replies: 16
Views: 1,762
Posted By Mich48041
There could be a separate alternator switch. ...

There could be a separate alternator switch. What are the advantages?
Forum: RV-12 10-17-2018, 06:57 AM
Replies: 14
Views: 1,533
Posted By Mich48041
The Permatex Form-a-Gasket, that I used on black...

The Permatex Form-a-Gasket, that I used on black pipe natural gas fittings in my house, is soluble in rubbing alcohol. After tightening the joints, I thinned some Permatex with alcohol, then painted...
Forum: RV-12 10-16-2018, 12:45 PM
Replies: 34
Views: 3,890
Posted By Mich48041
You are right Tom about the maintenance manual...

You are right Tom about the maintenance manual specifying flushing the fuel pressure hose at annual or at 100 hours. It would be interesting to know the reason for doing that. My philosophy is, if...
Forum: RV-12 10-16-2018, 08:14 AM
Replies: 34
Views: 3,890
Posted By Mich48041
Bleeding the fuel pressure line does no good...

Bleeding the fuel pressure line does no good whatsoever unless the line is plugged and debris needs to be flushed out. It doesn't matter if the line is full of air. The air will be at the same...
Forum: Electrical Systems 10-13-2018, 10:36 AM
Replies: 10
Views: 865
Posted By Mich48041
From reading the automotive forums, the consensus...

From reading the automotive forums, the consensus is that a fuselink is marked with its actual size. So a 14 fuselink protects a #10 wire.
Forum: RV-12 10-09-2018, 06:31 PM
Replies: 13
Views: 2,070
Posted By Mich48041
Does the FAA set the never exceed speed or...

Does the FAA set the never exceed speed or maximum continuous cruise speed? Do not count on those FAA rumors coming true.
Forum: RV-12 10-07-2018, 09:21 AM
Replies: 61
Views: 10,695
Posted By Mich48041
Dynon has released D-180 firmware version 5.6.1...

Dynon has released D-180 firmware version 5.6.1 (http://dynonavionics.com/support-software-110713.php)
The new firmware is included in a new 5.6.1 PC SOFTWARE program.
The firmware is not a separate...
Forum: RV-12 10-06-2018, 06:47 AM
Replies: 4
Views: 976
Posted By Mich48041
Applying a force to the control stick and...

Applying a force to the control stick and measuring the deflection is the same principle used by many cable tension meters. The challenge is accurately converting that deflection to tension. It...
Forum: RV-12 10-05-2018, 08:09 AM
Replies: 4
Views: 976
Posted By Mich48041
Easier Way To Measure Stabilator Cable Tension

Not wanting to crawl into the tail cone to measure stabilator cable tension, I thought of an easier way to check the tension.
Move the control stick full aft until the stabilator hits the stop. Note...
Forum: RV-12 10-02-2018, 10:21 AM
Replies: 20
Views: 1,960
Posted By Mich48041
At least one RV-12 crashed on takeoff because the...

At least one RV-12 crashed on takeoff because the trim was set to climb. The airplane jumped off the ground, climbed steeply, stalled and nosed into the runway. Another crashed when the pilot was...
Forum: Electrical Systems 10-01-2018, 09:36 PM
Replies: 26
Views: 1,220
Posted By Mich48041
Yes, parallel.

Yes, parallel.
Forum: Electrical Systems 10-01-2018, 09:34 PM
Replies: 26
Views: 1,220
Posted By Mich48041
LEDs can be purchased for as little as 12 cents...

LEDs can be purchased for as little as 12 cents each from electronic suppliers such as Mouser or Digikey or Newark or Allied. Shipping will cost more than the parts.
Forum: Electrical Systems 10-01-2018, 09:26 PM
Replies: 26
Views: 1,220
Posted By Mich48041
It seems that the Aircraft Spruce map light...

It seems that the Aircraft Spruce map light already contains a resistor and will operate in a 12 system without any external resistor.
Forum: Electrical Systems 10-01-2018, 09:22 PM
Replies: 26
Views: 1,220
Posted By Mich48041
Without having the LED datasheet, everyone's...

Without having the LED datasheet, everyone's reply is just a guess.
My guess is a 360 ohm, 1/2 watt resistor in series with 4 Red LEDs in series.
That is based on a 14.5 volt supply and 1.8 volt drop...
Forum: RV-12 09-07-2018, 09:39 PM
Replies: 5
Views: 939
Posted By Mich48041
Anyone, even your teenage neighbor, can do...

Anyone, even your teenage neighbor, can do maintenance on an experimental aircraft no matter if it is registered as an E-AB or E-LSA. The advantage of E-LSA is that a new owner can do the annual...
Forum: RV-12 09-06-2018, 12:04 PM
Replies: 13
Views: 2,864
Posted By Mich48041
The trim motor is a completely separate circuit...

The trim motor is a completely separate circuit than the indicator. So no matter how the indicator is wired, it will have no affect on motor operation.
According to Van's schematic:
WHT/ORG is...
Forum: RV-12 09-06-2018, 07:25 AM
Replies: 15
Views: 2,244
Posted By Mich48041
There was a 3 part series by Brian & Carol...

There was a 3 part series by Brian & Carol Carpenter about the Rotax carburetor
in the Jan, Feb & March 2017 issues of Sport Aviation (Experimenter section).
PDF copies can be downloaded from EAA...
Forum: RV-12 09-05-2018, 08:09 PM
Replies: 13
Views: 2,864
Posted By Mich48041
To sglynn, I think that you are correct about...

To sglynn,
I think that you are correct about wires being connected wrong.
Try switching the wht/green and wht/blue wires with each other.
Forum: RV-12 09-01-2018, 09:34 PM
Replies: 4
Views: 725
Posted By Mich48041
Tthere is a very small coax that connects the GPS...

Tthere is a very small coax that connects the GPS data to the ELT. Make sure the center of the coax is not shorted to the shield. And make sure the connector is not shorted to ground.
Forum: Electrical Systems 08-31-2018, 09:24 PM
Replies: 16
Views: 1,762
Posted By Mich48041
Failure of the master contactor is unlikely. If...

Failure of the master contactor is unlikely. If it does fail, that failure will likely occur during startup, not during cruise. Even if the battery contactor does fail during cruise, the electrical...
Forum: RV-12 08-27-2018, 09:19 PM
Replies: 5
Views: 1,116
Posted By Mich48041
Fuel tank sealant is not fireproof. It gives off...

Fuel tank sealant is not fireproof. It gives off toxic fumes when burning. And once ignited, keeps burning.
Forum: Electrical Systems 08-27-2018, 12:14 PM
Replies: 14
Views: 957
Posted By Mich48041
If there is a high resistance connection,...

If there is a high resistance connection, avionics with a switching power supply will draw more current to compensate.
Forum: RV-12 08-24-2018, 12:03 PM
Replies: 35
Views: 6,890
Posted By Mich48041
The same paste used on spark plugs can be used. ...

The same paste used on spark plugs can be used. Search for heat or thermal conductive paste.
I found it on Amazon and Home Depot websites. Your local computer store has it for mounting CPUs.
Use...
Forum: RV-12 08-24-2018, 10:54 AM
Replies: 35
Views: 6,890
Posted By Mich48041
Search eBay for AM101406" or "MIA881279" for John...

Search eBay for AM101406" or "MIA881279" for John Deere $20 clone.
If you are in a hurry, NAPA 7068102 for $95.49, but it looks identical to $20 one.
Whatever you buy, mount it using heat conductive...
Forum: RV-12 08-23-2018, 09:49 PM
Replies: 8
Views: 1,318
Posted By Mich48041
LINK...

LINK (http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z16M.pdf) to Bob Nuckolls' drawing.
Forum: RV-12 08-22-2018, 07:04 PM
Replies: 8
Views: 1,318
Posted By Mich48041
RV-12s with the Rotax ULS do not have...

RV-12s with the Rotax ULS do not have over-voltage protection. Luckily it seems that the Ducati Regulator fails with low voltage, not high, at least so far.
Over-voltage protection is mandatory...
Forum: Electrical Systems 08-20-2018, 03:23 PM
Replies: 161
Views: 38,105
Posted By Mich48041
It is unlikely that the battery is the problem. ...

It is unlikely that the battery is the problem. The majority of electrical problems are caused by bad connections.
Take apart every connection in the charging system, clean mating surfaces, and...
Forum: Electrical Systems 08-20-2018, 08:06 AM
Replies: 161
Views: 38,105
Posted By Mich48041
Is 13.8 - 13.9 volts too low?

It depends. There are hundreds of RV-12s flying with a PC-680 battery and a Ducati regulator that puts out 13.8 volts.
That voltage is not a problem even though the battery will be charged slower...
Forum: Electrical Systems 08-15-2018, 07:13 PM
Replies: 17
Views: 2,894
Posted By Mich48041
Assuming that the ammeter will only be measuring...

Assuming that the ammeter will only be measuring the millivolt drop across the shunt and that no current will be flowing,
then resistors (1K ohm?) could be used instead of fuses or fusible links.
Forum: RV-12 08-15-2018, 09:09 AM
Replies: 11
Views: 2,031
Posted By Mich48041
It is not good for the engine to be lugging. The...

It is not good for the engine to be lugging. The prop should be re-pitched.

I would not shut off the electric pump in flight.

If there really is a high fuel flow and not an indication problem,...
Showing results 1 to 62 of 500

 
Forum Jump

All times are GMT -6. The time now is 09:48 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.