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Search: Posts Made By: Carl Froehlich
Forum: RV-14 Today, 08:48 AM
Replies: 11
Views: 425
Posted By Carl Froehlich
Turner - PM me your phone number and I will offer...

Turner - PM me your phone number and I will offer my thoughts on why two batteries and one alternator provide the basis for a far more robust design as compared to two alternators and one battery....
Forum: RV-14 12-04-2019, 08:37 AM
Replies: 11
Views: 425
Posted By Carl Froehlich
Here is how one RV-14A builder added a second...

Here is how one RV-14A builder added a second PC-680 in his...
Forum: RV-10 12-03-2019, 06:29 PM
Replies: 24
Views: 1,510
Posted By Carl Froehlich
The short answer is yes - the longer answer is...

The short answer is yes - the longer answer is donít waste your time. This is not the reason for two PC-625s. The redundancy of a thoughtful, dual battery power distribution design should be your...
Forum: RV-10 12-03-2019, 10:47 AM
Replies: 24
Views: 1,510
Posted By Carl Froehlich
As you all debate the Earthx product, a reminder...

As you all debate the Earthx product, a reminder that for the RV-10 battery weight is advantageous for W&B in standard configuration builds (as in no big aft AC unit).

What battery(s) is always a...
Forum: RV General Discussion/News 12-02-2019, 03:15 PM
Replies: 17
Views: 837
Posted By Carl Froehlich
Iíve seen a lot of harmonic noise coming out of a...

Iíve seen a lot of harmonic noise coming out of a battery charger. Avionics do not typically add filters for such noise. Batteries will absorb over voltage DC spikes, but not RF noise. This RF...
Forum: RV Ongoing Maintenance Issues 12-02-2019, 02:47 PM
Replies: 31
Views: 3,361
Posted By Carl Froehlich
Or, 3/8Ē solid aluminum rod. This ended the...

Or, 3/8Ē solid aluminum rod. This ended the problem of breakage on the first RV.

Carl
Forum: RV General Discussion/News 12-01-2019, 07:08 PM
Replies: 8
Views: 532
Posted By Carl Froehlich
No. Too clunky. Carl

No. Too clunky.

Carl
Forum: RV General Discussion/News 12-01-2019, 05:41 PM
Replies: 17
Views: 837
Posted By Carl Froehlich
Because most battery chargers are for just...

Because most battery chargers are for just charging a battery and do not have the filtering to keep out various spikes, ripples and other such noise. Look at the pMag install manual - it...
Forum: RV General Discussion/News 12-01-2019, 02:01 PM
Replies: 17
Views: 837
Posted By Carl Froehlich
Just use a real power supply

Why not just have a real power supply that emulates the alternator. That way you can:
- Charge the battery if needed.
- Run your panel for an indefinite period of time (note - never run any avionics...
Forum: COMM 11-29-2019, 05:47 PM
Replies: 11
Views: 681
Posted By Carl Froehlich
Ok - so this is the real problem statement - not...

Ok - so this is the real problem statement - not that you have an antenna problem.

A common (and simple) cause is a loose wire on the radio breaker(s). The radio will work fine on reception but...
Forum: COMM 11-29-2019, 10:07 AM
Replies: 11
Views: 681
Posted By Carl Froehlich
Stop guessing and get a real antenna analyzer. ...

Stop guessing and get a real antenna analyzer. It is a must have for things like making our own wingtip antennas, and is also is great for checking coax runs....
Forum: Electronic Ignition Systems 11-28-2019, 11:58 AM
Replies: 22
Views: 2,401
Posted By Carl Froehlich
Assuming you have an impulse mag on the left...

Assuming you have an impulse mag on the left side, put the pMag on the right.

Reason - typical startup is with the impulse mag only, the other is off until the engine starts. Replacing the right...
Forum: Glass Cockpit 11-26-2019, 11:11 AM
Replies: 16
Views: 828
Posted By Carl Froehlich
I caution everyone I run across using an iPad...

I caution everyone I run across using an iPad that it not for any element of IFR flight, other than flight planning and/or the third backup (or for music feed into the audio panel for the long cross...
Forum: Glass Cockpit 11-25-2019, 11:15 AM
Replies: 16
Views: 828
Posted By Carl Froehlich
The only database requirement to legally fly GPS...

The only database requirement to legally fly GPS approaches is to have a current NAV database. For something like the GTN-650 this is $299 per year for the US (from Garmin). If you have a modern...
Forum: RV General Discussion/News 11-25-2019, 09:17 AM
Replies: 7
Views: 694
Posted By Carl Froehlich
Here is how I did it on my RV-10 and the new RV-8...

Here is how I did it on my RV-10 and the new RV-8 project.

Looking at the Van's firewall oil cooler mount I decided the airflow bouncing off the firewall, then through the cooler, then again...
Forum: RV-14 11-24-2019, 04:42 PM
Replies: 17
Views: 1,290
Posted By Carl Froehlich
I got my IFR ticket in my RV-10. Finding an...

I got my IFR ticket in my RV-10. Finding an instructor is not hard - and they will give you the leads on the examiners that are RV friendly.

Get your ticket in the plane you will fly IFR. A 172 or...
Forum: RV General Discussion/News 11-24-2019, 12:53 PM
Replies: 7
Views: 694
Posted By Carl Froehlich
I typically use two pieces of 0.063Ē 3/4Ē x 3/4Ē...

I typically use two pieces of 0.063Ē 3/4Ē x 3/4Ē aluminum angle on the firewall (so each aft oil cooler flange is connected), and a single adel clamp on the engine mount to secure the forward oil...
Forum: RV General Discussion/News 11-24-2019, 08:23 AM
Replies: 12
Views: 1,001
Posted By Carl Froehlich
Find a hangar to share

Donít overlook sharing a hangar. In many T hangars a two seat RV will be a nice hangar mate for a high wing Cessna. My first RV (8A) shared a T hangar with another RV-8. I had mine nose in and he...
Forum: RV General Discussion/News 11-23-2019, 01:14 PM
Replies: 11
Views: 4,891
Posted By Carl Froehlich
Adapting IR alternators to aircraft use

There is a straight forward approach to adding over voltage protection to an IR alternator. Nuckels provides some nice guidance:...
Forum: Glass Cockpit 11-22-2019, 09:00 AM
Replies: 49
Views: 4,392
Posted By Carl Froehlich
This is ~$5K over the price I paid for my new...

This is ~$5K over the price I paid for my new project; dual SkyView HDX displays (with all the associated modules), Dynon radio for Comm #2, transponder, dual axis autopilot, ADS-B receiver, EMS, PS...
Forum: RV-8/8A 11-14-2019, 06:37 AM
Replies: 3
Views: 498
Posted By Carl Froehlich
I mounted both the ADS-B antenna and receiver aft...

I mounted both the ADS-B antenna and receiver aft of the rear baggage compartment. The antenna aft of that bulkhead and the receiver just forward. The receiver is connected to the rest of the...
Forum: RV General Discussion/News 11-13-2019, 08:01 AM
Replies: 24
Views: 1,770
Posted By Carl Froehlich
I had the following objectives on my RV-10 Oxygen...

I had the following objectives on my RV-10 Oxygen install:
- Must be a portable system. I want to be able to remove it, and refill it using a shared refill rig we setup at the Airpark (we all have...
Forum: RV General Discussion/News 11-12-2019, 07:59 AM
Replies: 5
Views: 592
Posted By Carl Froehlich
Iíve seen a lot of RVs that suffer from the...

Iíve seen a lot of RVs that suffer from the problem of ďnot rigged rightĒ. Rigging is an iterative, time consuming process - far from the ďone and doneĒ as implied in the plans.

My suggestions:
-...
Forum: Electronic Ignition Systems 11-11-2019, 08:50 AM
Replies: 11
Views: 798
Posted By Carl Froehlich
Provide a photo of the pMag with drive gear...

Provide a photo of the pMag with drive gear attached.

Carl
Forum: Electrical Systems 11-11-2019, 08:40 AM
Replies: 8
Views: 567
Posted By Carl Froehlich
Send a note to AEROLed - they have a nice track...

Send a note to AEROLed - they have a nice track record of taking care of customers even with the warranty a little expired.

Carl
Forum: Traditional Aircraft Engines 11-08-2019, 10:00 AM
Replies: 6
Views: 481
Posted By Carl Froehlich
Go LOP and see if #2 peaks at a significantly...

Go LOP and see if #2 peaks at a significantly higher fuel flow than the other cylinders. If so, that cylinder is getting less flow than normal - perhaps a clogged injector.

If you never took data...
Forum: RV General Discussion/News 11-05-2019, 08:45 AM
Replies: 4
Views: 438
Posted By Carl Froehlich
I would never consider testing with fuel inside...

I would never consider testing with fuel inside the house. Why too many bad things can happen.

Carl
Forum: Autopilots 11-02-2019, 10:59 AM
Replies: 8
Views: 673
Posted By Carl Froehlich
The SkyView autopilot module provides the trim...

The SkyView autopilot module provides the trim switching function as well as the AutoTrim function. It does not provide power for the roll and pitch servos. Put both of these on a standard 5amp...
Forum: RV-14 11-01-2019, 07:24 AM
Replies: 8
Views: 1,192
Posted By Carl Froehlich
While there are a lot of options using pins and...

While there are a lot of options using pins and such on the rudder horn, I would not do that. Too many have failed when most needed - the rudder lever arm is just to big.

I have used this simple...
Forum: RV Building Tips/Techniques 10-28-2019, 09:31 AM
Replies: 1
Views: 536
Posted By Carl Froehlich
Alternate air screw backing out

Two local RVs reported the screw that provides the pivot point for the engine alternate air door had backed out. The plans call for a #8 nutplate to hold this screw.

I did away with the nutplate...
Forum: Glass Cockpit 10-23-2019, 09:23 PM
Replies: 13
Views: 1,447
Posted By Carl Froehlich
Go fly with with your RV buddies that have glass...

Go fly with with your RV buddies that have glass and decide what you like.

Carl
Forum: RV-7/7A 10-23-2019, 07:18 AM
Replies: 38
Views: 3,177
Posted By Carl Froehlich
Not quite right: - Off, pMag control grounded...

Not quite right:
- Off, pMag control grounded (like a mag) so it is off, power is applied from ship power. I do not recommend applying power using the second side of a DPDT switch (as in Off, no...
Forum: RV-7/7A 10-22-2019, 08:18 PM
Replies: 38
Views: 3,177
Posted By Carl Froehlich
You do not ground the p-lead to test, you keep...

You do not ground the p-lead to test, you keep the pMag control on and turn off ship power to the pMag to make sure the internal generator is working (engine running). To do a ďmag checkĒ you take...
Forum: RV General Discussion/News 10-22-2019, 05:00 PM
Replies: 10
Views: 800
Posted By Carl Froehlich
Short answer - yes. Donít use these chargers but...

Short answer - yes. Donít use these chargers but if you really must anyway, never run anything in the plane with a charger connected.
Such chargers have killed more batteries than they are...
Forum: RV General Discussion/News 10-22-2019, 02:00 PM
Replies: 10
Views: 800
Posted By Carl Froehlich
Let me sequence what I think you said: - The...

Let me sequence what I think you said:
- The alternator worked fine before you did the panel work.
- The alternator did not work at all after the panel work (as evidenced by the zero output and alt...
Forum: RV General Discussion/News 10-22-2019, 01:48 PM
Replies: 14
Views: 1,422
Posted By Carl Froehlich
Use the same wingtip VOR antenna for the hand...

Use the same wingtip VOR antenna for the hand held. The antenna tune is close enough to work for comm for this backup function. You just need a way to swap the feed - or put a stand alone second...
Forum: RV-7/7A 10-22-2019, 11:34 AM
Replies: 38
Views: 3,177
Posted By Carl Froehlich
Some thoughts: - For the pMags recommend a simple...

Some thoughts:
- For the pMags recommend a simple on/off locking toggle switch (one for each) and a 5 amp pull breaker (do not use your VPX). To test the pMags you do a simple manual trip of the...
Forum: RV Ongoing Maintenance Issues 10-20-2019, 11:55 AM
Replies: 6
Views: 511
Posted By Carl Froehlich
Exactly. Tape over the pitot drain holes and...

Exactly.

Tape over the pitot drain holes and tape on a hose over both the pitot and AOA ports.


T your vacuum source to both the static and to this pitot connection.

Carl
Forum: RV General Discussion/News 10-19-2019, 09:24 AM
Replies: 5
Views: 888
Posted By Carl Froehlich
Not hard. A new ~$30 blank panel from Van’s,...

Not hard. A new ~$30 blank panel from Van’s, some time cutting holes and perhaps added a couple of support angles for the radio stack, then paint. Done. This assumes the builder did not do point...
Forum: RV-14 10-18-2019, 08:07 PM
Replies: 4
Views: 1,042
Posted By Carl Froehlich
+1 Just did a long IFR trip in a 14A with about...

+1
Just did a long IFR trip in a 14A with about 30 minutes in IMC. Just as good as the RV-10.

Carl
Forum: RV-7/7A 10-18-2019, 07:38 PM
Replies: 14
Views: 1,502
Posted By Carl Froehlich
Or, old school moving paper images on a template...

Or, old school moving paper images on a template has always worked perfectly for me. Easy to try a bunch of different layouts, all in full...
Forum: RV-7/7A 10-17-2019, 10:06 AM
Replies: 14
Views: 1,502
Posted By Carl Froehlich
Some thoughts: - Tuck the left EFIS display as...

Some thoughts:
- Tuck the left EFIS display as high and left as possible.
- Mount the GPS/Comm as high as possible.
- Mount the GPS/Com between the two EFIS displays using a little panel width as...
Forum: Electronic Ignition Systems 10-15-2019, 08:34 AM
Replies: 12
Views: 1,501
Posted By Carl Froehlich
Send it to Brad at pMag to test/fix it. This is...

Send it to Brad at pMag to test/fix it. This is cheap (other than whatever shipping will cost from France). Also good to send it in if you have not updated the firmware.

Carl
Forum: RV General Discussion/News 10-14-2019, 09:29 AM
Replies: 44
Views: 5,679
Posted By Carl Froehlich
Shoot fire, it is just wire and until you dive...

Shoot fire, it is just wire and until you dive into it you will have no assurance against something there waiting to bite you.

Rip it out and start over - this is not rocket science.

Why have this...
Forum: Glass Cockpit 10-11-2019, 07:18 PM
Replies: 10
Views: 793
Posted By Carl Froehlich
The SkyView feeds pressure attitude information...

The SkyView feeds pressure attitude information to the ARINC via the SkyView network connection. The ARINC then feeds this to the GNS430.

Carl
Forum: RV-10 10-11-2019, 10:46 AM
Replies: 24
Views: 3,767
Posted By Carl Froehlich
Perhaps you should consider how much you trust...

Perhaps you should consider how much you trust the aluminum anchor that you cut the tail tie down threads into.

For me, I would never raise the nose by pulling down on the tail tie down. Lifting...
Forum: COMM 10-10-2019, 04:49 PM
Replies: 6
Views: 484
Posted By Carl Froehlich
Yep - just read this. So for most installs that...

Yep - just read this.

So for most installs that translates to no capability for the pilot talking on Comm #1 and the Co-Pilot talking on Comm #2. Most people do not care, but as I found out...
Forum: COMM 10-10-2019, 04:28 PM
Replies: 6
Views: 484
Posted By Carl Froehlich
Sorry to hear this - never had this issue when...

Sorry to hear this - never had this issue when running the GTN-650 and the Dynon radio.

Carl
Forum: COMM 10-10-2019, 10:28 AM
Replies: 6
Views: 484
Posted By Carl Froehlich
Garmin GTR 200 cross talk

For you Garmin experts out there.

Helping an RV-14 builder with a flying plane. He has a Garmin radio stack (GTN-650, GTR 200 and GMA 240 Audio Panel).

The panel was wired and tested by an...
Forum: Autopilots 10-05-2019, 08:45 AM
Replies: 3
Views: 490
Posted By Carl Froehlich
The SkyView default settings are very close. Carl

The SkyView default settings are very close.

Carl
Forum: RV Building Tips/Techniques 09-30-2019, 08:35 AM
Replies: 24
Views: 2,648
Posted By Carl Froehlich
I assume you used non-hardening clay. I found...

I assume you used non-hardening clay.

I found that a little Coleman Fuel on my fingers worked a lot better than water to smooth the clay. Once I figure this out it was fairly straight...
Forum: RV General Discussion/News 09-29-2019, 08:30 PM
Replies: 11
Views: 993
Posted By Carl Froehlich
This works well - and puts out enough power to...

This works well - and puts out enough power to charge your battery while it powers your...
Forum: Glass Cockpit 09-29-2019, 09:10 AM
Replies: 19
Views: 1,355
Posted By Carl Froehlich
Alex, You may want to consider covering those...

Alex,

You may want to consider covering those exposed terminals.

Carl
Forum: Glass Cockpit 09-28-2019, 03:31 PM
Replies: 19
Views: 1,355
Posted By Carl Froehlich
+1. Three RVs and none have a shunt. So why...

+1. Three RVs and none have a shunt.

So why install an ampmeter? If you are old enough you may recall that all cars had an ampmeter but none had a voltmeter. The reason is ampmeters at the time...
Forum: Electrical Systems 09-24-2019, 05:05 PM
Replies: 14
Views: 696
Posted By Carl Froehlich
You have jumped to the conclusion that the Garmin...

You have jumped to the conclusion that the Garmin GTR200 is not the issue. My experience with the GTR200 has been problematic, with crosstalk noise as you describe - and this was a panel done by an...
Forum: Electronic Ignition Systems 09-24-2019, 11:01 AM
Replies: 14
Views: 2,904
Posted By Carl Froehlich
Brad is doing an update to make it consistent...

Brad is doing an update to make it consistent with the production run.

Carl
Forum: Electronic Ignition Systems 09-23-2019, 01:26 PM
Replies: 5
Views: 646
Posted By Carl Froehlich
Yep - you found your problem. Carl

Yep - you found your problem.

Carl
Forum: Electronic Ignition Systems 09-22-2019, 08:32 PM
Replies: 5
Views: 646
Posted By Carl Froehlich
Iím assuming you shifted from a mag to the pMag. ...

Iím assuming you shifted from a mag to the pMag. If so, did you use the same wire for tach input and if so, did you remove the inline resistor needed when using a mag to feed the Dynon?

Carl
Forum: RV-8/8A 09-22-2019, 02:21 PM
Replies: 2
Views: 573
Posted By Carl Froehlich
A common approach is to use the felt side of a...

A common approach is to use the felt side of a 3/4Ē wide roll of Velcro (adhesive backing). I did this and it stayed in place for years.

Carl
Forum: RV Building Tips/Techniques 09-22-2019, 12:30 PM
Replies: 14
Views: 2,439
Posted By Carl Froehlich
On the first point, donít overlook future panel...

On the first point, donít overlook future panel mods. Once flying many builders figure out that what seemed like a good idea (placement of stuff for example) proved other wise. Simple mods should...
Forum: RV Building Tips/Techniques 09-19-2019, 07:32 PM
Replies: 14
Views: 2,439
Posted By Carl Froehlich
Bill, If you question is for me then: -...

Bill,

If you question is for me then:
- Reliably, no problems on the multi year (and now 5th panel mod) on the 8A. No problems on the seven year (and now 3rd panel mod) on the RV-10. Note - I use...
Forum: RV-7/7A 09-19-2019, 07:18 PM
Replies: 56
Views: 6,176
Posted By Carl Froehlich
Iíll have to be a contrarian on this. I had dual...

Iíll have to be a contrarian on this. I had dual screen SkyViews in the RV-10 with the GTN-650 in the middle. The screens were biased left but the GTN-650 was in the middle. The left screen was...
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