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Search: Posts Made By: Mich48041
Forum: RV-12/RV-12iS 05-19-2022, 07:13 AM
Replies: 13
Views: 664
Posted By Mich48041
I attach a laser to the propeller so that it...

I attach a laser to the propeller so that it makes a red line on the floor. Mark the red line with a pencil.
I don't know the number of degrees. But the red line is 100 percent repeatable, much...
Forum: RV-12/RV-12iS 05-17-2022, 07:11 AM
Replies: 28
Views: 2,973
Posted By Mich48041
I flew solo and accumulated several hours before...

I flew solo and accumulated several hours before applying for insurance. If you are uncomfortable doing that, you could buy liability only for the first year and accumulate as many hours as...
Forum: RV-12/RV-12iS 05-16-2022, 07:12 AM
Replies: 20
Views: 1,503
Posted By Mich48041
Jim, it might help to modify the air intake of...

Jim, it might help to modify the air intake of the lower cowl to make it more streamlined. There are some square corners in the fiberglass around the oil cooler. If those areas were filled in, then...
Forum: RV-12/RV-12iS 05-08-2022, 06:22 AM
Replies: 10
Views: 715
Posted By Mich48041
There shouldn't be enough oil in the overflow...

There shouldn't be enough oil in the overflow bottle to cover the end of the vent tube.
Forum: RV-12/RV-12iS 05-07-2022, 08:45 PM
Replies: 10
Views: 715
Posted By Mich48041
How about putting the end of the tube into a...

How about putting the end of the tube into a bottle that is fastened to the firewall?
Forum: RV-12/RV-12iS 05-05-2022, 08:38 PM
Replies: 9
Views: 530
Posted By Mich48041
search eBay for AM101406, or MIA881279, or...

search eBay for AM101406, or MIA881279, or JDR1406
Price as low as $20
Forum: Electrical Systems 04-30-2022, 07:37 PM
Replies: 8
Views: 575
Posted By Mich48041
Aluminum will not shield against electromagnetic...

Aluminum will not shield against electromagnetic interference. That aluminum conduit is not smooth inside.
It might be difficult to push wires through. And it is expensive.
Forum: Electrical Systems 04-28-2022, 08:33 PM
Replies: 9
Views: 409
Posted By Mich48041
How about putting both wires into the same...

How about putting both wires into the same connector?
Just leave slack in case the probe needs to be replaced in the future.
Forum: Electrical Systems 04-24-2022, 05:06 PM
Replies: 13
Views: 884
Posted By Mich48041
True, but current limiters don't have contacts or...

True, but current limiters don't have contacts or moving parts like circuit breakers do. Bob Nuckolls now recommends a fuselink instead of a current limiter to protect the alternator "B" lead from...
Forum: Electrical Systems 04-24-2022, 04:21 AM
Replies: 13
Views: 884
Posted By Mich48041
The circuit breaker protecting the alternator "B"...

The circuit breaker protecting the alternator "B" lead is single point of failure. It could be replaced with a current limiter.
Once the engine is running, the alternator powers the aircraft...
Forum: Electrical Systems 04-21-2022, 05:18 PM
Replies: 2
Views: 292
Posted By Mich48041
Best practice is for every load to have its own...

Best practice is for every load to have its own fuse. If the fuse blows, you only loose one load. Troubleshooting is easier too. On another forum, someone once asked how many fuses he should...
Forum: RV-12/RV-12iS 04-20-2022, 08:40 PM
Replies: 14
Views: 1,051
Posted By Mich48041
Go ahead and install the jumper per the plans. ...

Go ahead and install the jumper per the plans. After the plane is finished, go flying and shut off the master switch and notice that nothing electrical shuts off.
Then remove the jumper. Connect...
Forum: RV-12/RV-12iS 04-20-2022, 04:45 PM
Replies: 9
Views: 745
Posted By Mich48041
I looked at another builder's elevator. He only...

I looked at another builder's elevator. He only put in the rivets pictured in the drawing without reading the text. I asked him why he didn't put all of the rivets in. He pointed to the drawing...
Forum: Electrical Systems 04-20-2022, 10:00 AM
Replies: 12
Views: 526
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 short circuit can not only blow the individual load fuse, but also the bus fuse even though it is larger. Best to use a fuselink.
Forum: Electrical Systems 04-20-2022, 09:48 AM
Replies: 6
Views: 436
Posted By Mich48041
Fuses blow much quicker than circuit breakers...

Fuses blow much quicker than circuit breakers trip, even if the fuse is a larger value. A circuit breaker is used because it can be reset. A fuse in the circuit defeats that purpose. If you really...
Forum: Electrical Systems 04-19-2022, 06:17 PM
Replies: 6
Views: 436
Posted By Mich48041
Z-12 uses circuit breakers. So the 5 amp...

Z-12 uses circuit breakers. So the 5 amp alternator field circuit breaker can be installed right on the main bus. Z-11 has fuses. There is no easy way to install a circuit breaker on a fuse block....
Forum: RV-12/RV-12iS 04-19-2022, 05:58 PM
Replies: 9
Views: 745
Posted By Mich48041
Usually when nutplates are used, something gets...

Usually when nutplates are used, something gets mounted to the surface. So the the surface needs to be smooth with nothing protruding. So all nutplates and the skin they are attached to need to be...
Forum: RV-12/RV-12iS 04-19-2022, 05:36 PM
Replies: 14
Views: 1,051
Posted By Mich48041
Just to emphasize what Tony said, with a jumper...

Just to emphasize what Tony said, with a jumper on regulator terminal "C", shutting off the master switch while the engine is running does NOT shut off electrical power to the aircraft. Terminal C...
Forum: RV-12/RV-12iS 04-19-2022, 09:56 AM
Replies: 14
Views: 1,051
Posted By Mich48041
Just speculating, but at one time the voltage...

Just speculating, but at one time the voltage regulator was mounted on the underside of the instrument panel base.
Forum: RV-12/RV-12iS 04-19-2022, 02:37 AM
Replies: 63
Views: 21,209
Posted By Mich48041
See my POST...

See my POST (https://vansairforce.net/community/showpost.php?p=1596643&postcount=4). I had to buy new clamps because the O.D. is bigger.
Forum: Electrical Systems 04-18-2022, 05:41 PM
Replies: 16
Views: 1,748
Posted By Mich48041
A diode in parallel with a switch does absolutely...

A diode in parallel with a switch does absolutely no good whatsoever protecting the switch from arcing caused by inductive voltage spikes. The diode needs to be across the coil. The diode may be...
Forum: Electrical Systems 04-18-2022, 06:04 AM
Replies: 16
Views: 1,748
Posted By Mich48041
The Tyco circuit breaker pictured is rated for...

The Tyco circuit breaker pictured is rated for both AC and DC. Polarity does not matter.
Forum: RV-12/RV-12iS 04-15-2022, 12:22 PM
Replies: 3
Views: 817
Posted By Mich48041
Have you tested the capacitor to be sure it is...

Have you tested the capacitor to be sure it is still good?
Forum: RV-12/RV-12iS 04-12-2022, 04:37 PM
Replies: 35
Views: 3,814
Posted By Mich48041
As long as the elbow doesn't touch the muffler,...

As long as the elbow doesn't touch the muffler, does it matter if it is close?
Forum: RV-12/RV-12iS 04-07-2022, 10:41 AM
Replies: 8
Views: 942
Posted By Mich48041
Page 46-20 Revision 1 05/18/16 mentions P156 ...

Page 46-20 Revision 1 05/18/16 mentions P156 It is also mentioned on
PAGE 45A-04 REVISION: 2 DATE: 07/03/14
I can't find it on the latest plans.
Forum: Electrical Systems 04-06-2022, 08:33 PM
Replies: 5
Views: 736
Posted By Mich48041
One of the wires that you touched might might be...

One of the wires that you touched might might be the one with a loose or corroded terminal.
Forum: RV-12/RV-12iS 04-06-2022, 08:29 PM
Replies: 8
Views: 942
Posted By Mich48041
I don't know but assume the wires are ready made....

I don't know but assume the wires are ready made. Maybe they come with the avionics.
Forum: Electrical Systems 04-06-2022, 04:11 PM
Replies: 5
Views: 736
Posted By Mich48041
The first thing to check is for loose or corroded...

The first thing to check is for loose or corroded terminals and connections.
Other possibilities are a bad alternator on-off switch or bad alternator brushes or loose alternator belt.
Forum: RV-12/RV-12iS 04-05-2022, 08:53 PM
Replies: 8
Views: 942
Posted By Mich48041
Look at the picture in post #3 above. Notice...

Look at the picture in post #3 above. Notice that P204 is followed by 12 and 3. The 12 means that the wire size is 12AWG. The 3 means that the wire is 3 inches long. All three of the wires that...
Forum: RV-12/RV-12iS 04-02-2022, 03:54 PM
Replies: 8
Views: 942
Posted By Mich48041
The latest plans do not show details. Below is a...

The latest plans do not show details. Below is a picture of the original drawing.
Forum: RV-12/RV-12iS 04-02-2022, 03:34 PM
Replies: 8
Views: 942
Posted By Mich48041
Looking at 46-19 revision 1 dated 04/06/18, the...

Looking at 46-19 revision 1 dated 04/06/18, the drawing shows where all of the wires go.
What terminals on the Silent Hektik are you concerned with?
If terminal "C" is wired as shown, then shutting...
Forum: RV-12/RV-12iS 03-29-2022, 06:35 PM
Replies: 35
Views: 3,814
Posted By Mich48041
It is not that hard to lift the intake manifold.

It is not that hard to lift the intake manifold.
Forum: RV-12/RV-12iS 03-27-2022, 04:41 AM
Replies: 8
Views: 900
Posted By Mich48041
My original Ducati regulator was set at 13.8V,...

My original Ducati regulator was set at 13.8V, which is the bare minimum.
That worked fine because the Rotax 912ULS started so quickly that the battery did not need much charging. For a lead acid...
Forum: Electrical Systems 03-26-2022, 11:20 AM
Replies: 5
Views: 965
Posted By Mich48041
Bob Nuckolls uses 1N5400 diodes on many of his...

Bob Nuckolls uses 1N5400 diodes on many of his wiring diagrams.
The part number is not important. Just about any diode will suppress high voltage inductive spikes that can damage the controlling...
Forum: RV-12/RV-12iS 03-24-2022, 08:12 PM
Replies: 4
Views: 884
Posted By Mich48041
Fuel pressure is the same throughout a system...

Fuel pressure is the same throughout a system when there is no flow.
When there is flow, the pressure drops as the fuel passes through pipes and fittings
and hoses and filters and valves. Even a...
Forum: Electrical Systems 03-24-2022, 10:50 AM
Replies: 35
Views: 6,392
Posted By Mich48041
Bob N once said, "That tripped circuit breaker...

Bob N once said, "That tripped circuit breaker just prevented a fire. Why would you want to give the fire a second chance?"
Forum: Electrical Systems 03-21-2022, 08:35 AM
Replies: 12
Views: 1,319
Posted By Mich48041
I replaced the PC680 in my RV-12 with a...

I replaced the PC680 in my RV-12 with a Power-Sonic PDC-12200B.
The 3 inch dimension is slightly bigger. I had to spread the battery box slightly to get the Power-Sonic PDC-12200B into it. The new...
Forum: Electrical Systems 03-18-2022, 03:56 AM
Replies: 9
Views: 705
Posted By Mich48041
To draw schematic diagrams, I use the free...

To draw schematic diagrams, I use the free classic version of ExpressSCH.exe which is part of Express.PCB (https://www.expresspcb.com/expresspcb-classic-pcb-layout-software/#wow-modal-id-1)
It is...
Forum: RV-12/RV-12iS 03-18-2022, 03:44 AM
Replies: 35
Views: 3,814
Posted By Mich48041
Don't buy the hoses that I did (post #4 above). ...

Don't buy the hoses that I did (post #4 above). They are 1/8 inch larger in outside diameter compared to the original hoses.
Forum: RV-12/RV-12iS 03-18-2022, 03:40 AM
Replies: 247
Views: 37,195
Posted By Mich48041
Josh Chamberlain, welcome to VansAirforce!

Josh Chamberlain, welcome to VansAirforce!
Forum: Electrical Systems 03-17-2022, 01:11 AM
Replies: 14
Views: 1,269
Posted By Mich48041
In the event of smoke in the cockpit or an...

In the event of smoke in the cockpit or an imminent forced landing, the pilot should have the ability to shut off all electrical power as close to the source(s) as practical. It is not desired to...
Forum: Electrical Systems 03-16-2022, 05:42 PM
Replies: 14
Views: 1,269
Posted By Mich48041
Yes, 14.2 volts will charge a lead battery like...

Yes, 14.2 volts will charge a lead battery like the PC680. I don't know about charging a lithium battery.
Forum: RV-12/RV-12iS 03-16-2022, 05:35 PM
Replies: 35
Views: 3,814
Posted By Mich48041
Coolant Hoses

McMaster Carr
5 Feet Hi-Temp Silicone Coolant Hose Yarn Reinforced 5/8" ID, 1" OD 5296K321
1 Foot Hi-Temp Silicone Coolant Hose Wire Reinforced 5/8" ID, 1" OD Part#: 5591K12 for 90 degree bend
4 each...
Forum: RV-12/RV-12iS 03-16-2022, 04:34 AM
Replies: 18
Views: 1,610
Posted By Mich48041
To receive the documentation required to license...

To receive the documentation required to license and fly an E-LSA aircraft, including FAA form 8130-15 Light Sport Aircraft Statement of Compliance, the following statement must be true and signed:
I...
Forum: RV-12/RV-12iS 03-16-2022, 04:21 AM
Replies: 5
Views: 595
Posted By Mich48041
The Jan, Feb & March 2017 issues of Sport...

The Jan, Feb & March 2017 issues of Sport Aviation have a 3 part series about the Bing carburetor by Carol and Brian Carpenter.
Forum: Electrical Systems 03-14-2022, 10:59 AM
Replies: 5
Views: 507
Posted By Mich48041
Like ColoradoDolar wrote, it doesn't matter which...

Like ColoradoDolar wrote, it doesn't matter which wire connects to which terminal as long as the correct two terminals are used. The stall vane switch is not polarity sensitive. The label "COM"...
Forum: RV-12/RV-12iS 03-11-2022, 08:09 AM
Replies: 3
Views: 680
Posted By Mich48041
The instrument panel is 0.063" thick. Van's does...

The instrument panel is 0.063" thick. Van's does not sell a blank one. Just buy a sheet of aluminum and use the old panel as a pattern. A vixen file works great for final shaping. My favorite...
Forum: Electrical Systems 03-10-2022, 02:11 AM
Replies: 10
Views: 1,576
Posted By Mich48041
If the alternator "B" lead is connected to the...

If the alternator "B" lead is connected to the main power bus, then the "B" lead should be fused just like the loads are.
Forum: Electrical Systems 03-09-2022, 07:47 AM
Replies: 10
Views: 1,576
Posted By Mich48041
No, the "B" lead is big enough to carry the full...

No, the "B" lead is big enough to carry the full output of the alternator without overheating. The alternator is not capable of putting out much more than its rated output. Even if there was a fuse...
Forum: Electrical Systems 03-08-2022, 08:04 PM
Replies: 20
Views: 1,644
Posted By Mich48041
Go ahead and mount both contactors in the rear if...

Go ahead and mount both contactors in the rear if you want.
Use 10 or 12 AWG wire for the main bus feeder. It will only carry battery charging current.
The alternator will power the main bus, not...
Forum: Electrical Systems 03-07-2022, 05:01 PM
Replies: 5
Views: 404
Posted By Mich48041
The alternator "B" lead fuse should be as close...

The alternator "B" lead fuse should be as close to the battery as practical without carrying starter motor current. If the alternator or its B lead short to ground, that fuse will blow, thus...
Forum: Electrical Systems 03-06-2022, 09:57 AM
Replies: 31
Views: 2,539
Posted By Mich48041
Tcheairs, I sent you a private message. Some...

Tcheairs, I sent you a private message. Some diodes allow milliamps of reverse leakage.
Forum: RV-12/RV-12iS 03-06-2022, 04:06 AM
Replies: 23
Views: 2,735
Posted By Mich48041
Batteries don't kill voltage regulators, but heat...

Batteries don't kill voltage regulators, but heat does.
Use heat conductive paste between metal mounting surfaces.
My John Deere voltage regulator has many hours on it.
It is afraid to fail because...
Forum: Electrical Systems 03-05-2022, 05:18 PM
Replies: 31
Views: 2,539
Posted By Mich48041
How is the electrical current getting past the...

How is the electrical current getting past the master battery contactor?
Is there an E-Bus? If so, do you normally shut off the E-Bus along with the master switch?
Do you have a wiring diagram for...
Forum: RV-12/RV-12iS 03-04-2022, 12:39 PM
Replies: 23
Views: 2,735
Posted By Mich48041
The vast majority of electrical problems are due...

The vast majority of electrical problems are due to bad connections.
Check each one on the voltage regulator.
Forum: Electrical Systems 03-04-2022, 12:27 PM
Replies: 2
Views: 310
Posted By Mich48041
Hot wires are less likely to short out after...

Hot wires are less likely to short out after being disconnected if they have female terminals.
If polarity is important, choose the sex of the terminals to prevent reversed polarity.
Forum: RV-12/RV-12iS 03-04-2022, 12:10 PM
Replies: 23
Views: 2,735
Posted By Mich48041
Dale, Check the resistance between the two yellow...

Dale, Check the resistance between the two yellow generator wires. It should be less than one ohm.
Also check to be sure that neither generator yellow wire is grounded.
Have you checked the 30 amp...
Forum: Electrical Systems 03-03-2022, 10:58 AM
Replies: 31
Views: 2,539
Posted By Mich48041
Checking for parasitic loads on battery.

With the battery contactor shut off, disconnect the cable from the negative terminal of the battery. Measure the voltage between the now disconnected negative battery cable and the negative battery...
Forum: Electrical Systems 03-02-2022, 07:21 PM
Replies: 28
Views: 1,843
Posted By Mich48041
Can you provide a link to where Bob Nuckolls...

Can you provide a link to where Bob Nuckolls wrote that?
It is hard to believe.
Forum: RV-12/RV-12iS 03-02-2022, 01:03 PM
Replies: 40
Views: 5,689
Posted By Mich48041
It is unlikely that one battery will charge...

It is unlikely that one battery will charge another battery.
Forum: Electrical Systems 03-01-2022, 06:39 PM
Replies: 28
Views: 1,843
Posted By Mich48041
Some TO-220 devices have the metal tab with screw...

Some TO-220 devices have the metal tab with screw hole connected to one of the terminals.
I believe that the mounting tab on TO-220-3 FP case is isolated from the 3 terminals.
Forum: RV-12/RV-12iS 03-01-2022, 07:18 AM
Replies: 40
Views: 5,689
Posted By Mich48041
Unintentionally pulling back on the stick while...

Unintentionally pulling back on the stick while attempting to close to the canopy can cause the wings to stall, thus resulting in pitch down. If a pilot tries to counteract the pitch down by pulling...
Forum: RV-12/RV-12iS 03-01-2022, 06:26 AM
Replies: 40
Views: 5,689
Posted By Mich48041
You have that right Jim. I clicked on the link...

You have that right Jim. I clicked on the link in post number 28. It stated, "the pilot lost grip of the canopy when it opened to the full vertical position"
That is not possible. Try opening your...
Forum: Electrical Systems 02-28-2022, 09:38 PM
Replies: 28
Views: 1,843
Posted By Mich48041
863-MBRF20L45CTG is suitable for powering a...

863-MBRF20L45CTG is suitable for powering a device from two power sources.
$1.66 each. It will drop 0.4 volts when conducting 5 amps.
Showing results 1 to 64 of 500

 
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