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Search: Posts Made By: Mich48041
Forum: RV-12 Today, 09:30 PM
Replies: 4
Views: 433
Posted By Mich48041
Make sure that the cement is made specifically...

Make sure that the cement is made specifically for acrylic. It is like melting and welding the acrylic pieces together.
Forum: RV-12 Yesterday, 10:03 AM
Replies: 29
Views: 1,150
Posted By Mich48041
Why even have a connector that can be unplugged? ...

Why even have a connector that can be unplugged? The trim servo is not something that is frequently removed, if ever. If it is ever replaced, an unpluggable connector is not any help because the...
Forum: RV-12 12-09-2018, 01:00 PM
Replies: 29
Views: 1,150
Posted By Mich48041
The most likely problem is a bad connection as...

The most likely problem is a bad connection as John G posted. If all of the connections seem to be good, then a 5K potentiometer could be substituted for the Ray Allen pot. Doing that will help to...
Forum: RV-12 12-07-2018, 07:59 AM
Replies: 31
Views: 6,949
Posted By Mich48041
bobg56, pictures can not be posted on...

bobg56, pictures can not be posted on VansAirforce. They must be uploaded to some other website. Then you provide a link to that website on VansAirforce.
Forum: RV-12 12-06-2018, 08:46 AM
Replies: 43
Views: 13,518
Posted By Mich48041
There is an article about propellers in the...

There is an article about propellers in the January 2019 issue of Kitplanes. It says that for lower horsepower engines, a two blade propeller is more efficient. But a 3 blade propeller is quieter,...
Forum: RV-12 12-05-2018, 07:01 PM
Replies: 29
Views: 1,150
Posted By Mich48041
The pitch trim connects to GP3. See page 6-6 of...

The pitch trim connects to GP3.
See page 6-6 of the D-180 Installation Guide (http://dynonavionics.com/includes/guides/FlightDEK-D180_Installation_Guide_Rev_H.pdf).
Forum: RV-12 12-05-2018, 06:54 PM
Replies: 31
Views: 6,949
Posted By Mich48041
An oil thermostat will shorten warm up time...

An oil thermostat will shorten warm up time because engine heat will not be wasted warming up the oil in the oil cooler and will not be wasted heating up the air flowing though the oil cooler.
Forum: RV-12 12-03-2018, 01:25 AM
Replies: 3
Views: 484
Posted By Mich48041
There is a setting to disable alarms for the...

There is a setting to disable alarms for the first 5 minutes. Make sure that feature is turned on.
Forum: RV-12 11-29-2018, 08:39 AM
Replies: 15
Views: 1,053
Posted By Mich48041
As for the intercom buzz, make sure the mic jacks...

As for the intercom buzz, make sure the mic jacks are isolated from the airframe with insulating step washers. If there is a music jack, disconnect it.
Forum: RV-12 11-27-2018, 06:32 PM
Replies: 15
Views: 1,053
Posted By Mich48041
If your GALS (or LTRS) USED reads higher than you...

If your GALS (or LTRS) USED reads higher than you expect,
increase the K-factor.
Try setting the K factor while cruising at 5000 RPM so that GPH equals 4.9
Forum: RV-12 11-25-2018, 11:34 AM
Replies: 3
Views: 379
Posted By Mich48041
Is there a wire attached to the pin? If so, what...

Is there a wire attached to the pin? If so, what color is it?
Give us a list of the numbers corresponding to the empty holes of the D-Sub connector.
According to Van's schematic, the following holes...
Forum: Electrical Systems 11-24-2018, 05:55 PM
Replies: 15
Views: 1,268
Posted By Mich48041
If the switch will be interrupting an inductive...

If the switch will be interrupting an inductive load, the switch can be protected against contact arcing by connecting the banded end of a diode to the load side of the switch. Connect the other end...
Forum: Electrical Systems 11-24-2018, 02:33 PM
Replies: 15
Views: 1,268
Posted By Mich48041
Switches are not like fuses that blow apart if...

Switches are not like fuses that blow apart if the current rating is exceeded. But the life of a switch will be reduced if it switches too much current. Suppose that a switch is rated for 10,000...
Forum: RV-12 11-24-2018, 02:10 PM
Replies: 6
Views: 589
Posted By Mich48041
Read THIS...

Read THIS (http://www.vansairforce.com/community/showpost.php?p=429784&postcount=24) post by PeterK
Forum: RV-12 11-20-2018, 05:36 PM
Replies: 28
Views: 3,706
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 11-20-2018, 05:31 PM
Replies: 28
Views: 3,706
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 11-19-2018, 08:27 AM
Replies: 2
Views: 410
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: 6
Views: 437
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: 6
Views: 437
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: 1,106
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: 1,106
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: 1,106
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: 1,106
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: 1,106
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: 2,844
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: 11
Views: 1,849
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: 1,274
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: 766
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: 766
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: 2,416
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: 1,141
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: 1,141
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: 740
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: 648
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: 1,893
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: 7,469
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: 2,844
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: 1,394
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: 1,649
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: 2,844
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: 1,649
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: 1,649
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: 482
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: 1,166
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: 3,764
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: 15,400
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: 1,874
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: 1,645
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: 3,992
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: 3,992
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: 1,034
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: 2,140
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: 10,768
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: 1,035
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: 1,035
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: 2,167
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: 1,438
Posted By Mich48041
Yes, parallel.

Yes, parallel.
Forum: Electrical Systems 10-01-2018, 09:34 PM
Replies: 26
Views: 1,438
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: 1,438
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: 1,438
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: 19
Views: 2,138
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: 2,956
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...
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