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Search: Posts Made By: Carl Froehlich
Forum: RV-8/8A Yesterday, 02:28 PM
Replies: 2
Views: 113
Posted By Carl Froehlich
Chip, PM me your email address and I’ll provide...

Chip,

PM me your email address and I’ll provide photos.

I mounted a PC-625 in the forward baggage well, and a second PC-625 in the normal aft location. Both are mounted on modified stock Van’s...
Forum: Electrical Systems 01-15-2022, 09:45 AM
Replies: 41
Views: 3,148
Posted By Carl Froehlich
Interesting video, but I have never soldered...

Interesting video, but I have never soldered directly on to insulated wires, and do not recommend doing so. You may not create a short in the process, but the insulation will be damage such that...
Forum: RV-14 01-14-2022, 09:30 AM
Replies: 13
Views: 973
Posted By Carl Froehlich
This is a good exercise for every builder to do. ...

This is a good exercise for every builder to do. I suggest however that the last step of the exercise is the most important; “Theory to Practice”.

You will need a nice instrumented ~30amp regulated...
Forum: Glass Cockpit 01-12-2022, 04:30 PM
Replies: 11
Views: 485
Posted By Carl Froehlich
Exactly - especially when you consider this is a...

Exactly - especially when you consider this is a trivial expense for Garmin to just include it on all boxes.

I’ll continue to fat finger the flight plan into the 650 and spend the $1300 on...
Forum: RV-8/8A 01-12-2022, 11:16 AM
Replies: 7
Views: 431
Posted By Carl Froehlich
Ok, but I suggest paint is a boatload easier. I...

Ok, but I suggest paint is a boatload easier.

I use a medium gray on the interior, a dark gray on controls, rudder pedals and such as well as engine baffles and components (like the snorkel). The...
Forum: RV-8/8A 01-11-2022, 06:53 PM
Replies: 7
Views: 431
Posted By Carl Froehlich
I suggest powder coat will not work, too thick...

I suggest powder coat will not work, too thick for the slider to work.

I primed the tube (the one with the adjustment holes). Works well. I painted all the other parts using PPG urethane single...
Forum: RV-8/8A 01-10-2022, 04:04 PM
Replies: 9
Views: 1,238
Posted By Carl Froehlich
While you have it out, do this mod so you rarely...

While you have it out, do this mod so you rarely need to take it out going forward.

Carl
https://i.postimg.cc/BZNKH4zx/F47-ED639-5-CD1-4952-8-A73-096-BDA35-E811.jpg
Forum: Electrical Systems 01-09-2022, 05:43 PM
Replies: 20
Views: 1,251
Posted By Carl Froehlich
Sure, but consider: - Longer recharge time after...

Sure, but consider:
- Longer recharge time after engine start. Should not be a problem if you have a healthily battery to start with.
- I have never seen a belt driven alternator with a broken belt...
Forum: Electrical Systems 01-09-2022, 05:36 PM
Replies: 20
Views: 3,697
Posted By Carl Froehlich
Dan - I don’t think your question was...

Dan - I don’t think your question was answered.

Carl
Forum: Electrical Systems 01-09-2022, 05:29 PM
Replies: 19
Views: 1,268
Posted By Carl Froehlich
I assume this is a new issue, as this alternator...

I assume this is a new issue, as this alternator did work at some point. Did you look to see if the drive gear is still intact?

Carl
Forum: COMM 01-09-2022, 10:18 AM
Replies: 5
Views: 824
Posted By Carl Froehlich
#1. No, the pad makes no difference. Take it...

#1. No, the pad makes no difference. Take it out if you like.
#2. Use the backup plate. It has nothing to do with antenna performance, just mounting strength.
#3. Nutplates work, but for you the...
Forum: RV-14 01-08-2022, 11:29 AM
Replies: 6
Views: 544
Posted By Carl Froehlich
I fill in the complete end rib on the wingtips...

I fill in the complete end rib on the wingtips and all control surfaces. This is strictly cosmetic and does take time. I drill a 3/16” hole through the glass fill on the trailing edge to have a...
Forum: Glass Cockpit 01-04-2022, 09:22 AM
Replies: 15
Views: 1,027
Posted By Carl Froehlich
The Dynon radio as Comm #2 is flying in all three...

The Dynon radio as Comm #2 is flying in all three of my RV builds. I find it better than most standard stand alone comms (and as good as the GTN-650 radio).

For this install I do not want to...
Forum: Electronic Ignition Systems 01-04-2022, 09:02 AM
Replies: 23
Views: 1,127
Posted By Carl Froehlich
Looking at the classic Lightspeed diagram for the...

Looking at the classic Lightspeed diagram for the aux battery demonstrates a key design problem.

Assume the aux battery is dead. Unless the pilot opens the breaker before the diode that feeds that...
Forum: Glass Cockpit 01-03-2022, 03:48 PM
Replies: 0
Views: 192
Posted By Carl Froehlich
Using the GNC-355

Looking for someone doing ILS approaches with the GNC-355 and a stand alone NAV/ILS receiver.

I have a lot of time flying such approaches with the GTN-650. The approach shows up on my SkyView, and...
Forum: Electronic Ignition Systems 01-03-2022, 12:35 PM
Replies: 23
Views: 1,127
Posted By Carl Froehlich
One other comment, if you run dual ship power...

One other comment, if you run dual ship power dependent ignitions I strongly recommend a robust electrical power design. Perhaps they exist but I have not seen a “per instructions” backup battery...
Forum: Electronic Ignition Systems 01-03-2022, 10:46 AM
Replies: 23
Views: 1,127
Posted By Carl Froehlich
Yes - PM me if interested. Carl

Yes - PM me if interested.

Carl
Forum: Electronic Ignition Systems 01-03-2022, 10:32 AM
Replies: 23
Views: 1,127
Posted By Carl Froehlich
My first RV-8A started out life 20 years ago with...

My first RV-8A started out life 20 years ago with dual Plasma II+ ignitions, and a power system designed to make sure at least one always had power.

I removed this ignition at ~300 hours after...
Forum: Glass Cockpit 01-03-2022, 09:15 AM
Replies: 15
Views: 1,027
Posted By Carl Froehlich
This was my first “Plan B” option. At $3K it is...

This was my first “Plan B” option. At $3K it is a little pricey but considering the comments so far I suspect I’ll be happier with it.

I have installed the GTN-650 in two RVs and I really do not...
Forum: Glass Cockpit 01-02-2022, 06:26 PM
Replies: 15
Views: 1,027
Posted By Carl Froehlich
Thanks for the responses. I’d prefer the Trig...

Thanks for the responses. I’d prefer the Trig NAV/Comm to go with the GNC 355 but it is not yet available, and PS Engineering dropping the nice PDA 360EX means I need a new option for the audio...
Forum: Glass Cockpit 01-02-2022, 12:31 PM
Replies: 15
Views: 1,027
Posted By Carl Froehlich
MGL PIREP??

Now selecting the panel elements for the new RV-10 project. Here is the list of decisions made:
- Dual SkyView HDX displays
- SkyView XPDR
- SkyView ADS-B receiver
- SkyView autopilot servos and...
Forum: RV-8/8A 01-01-2022, 04:57 PM
Replies: 9
Views: 727
Posted By Carl Froehlich
GTN-650 on the left, high. Easy to see and...

GTN-650 on the left, high. Easy to see and manipulate with the left hand (I’m right handed). Dynon knob panel (most manipulated module on the panel) is low and left (left hand falls on it, after a...
Forum: Safety 12-31-2021, 07:15 PM
Replies: 39
Views: 5,275
Posted By Carl Froehlich
A lot easier to not have an ignition system with...

A lot easier to not have an ignition system with boxes, cables and stuff scattered around. Either a standard mag or a nice six cylinder pMag fits the bill.

There should not be anything mounted to...
Forum: RV Building Tips/Techniques 12-31-2021, 12:20 PM
Replies: 9
Views: 1,144
Posted By Carl Froehlich
I got my alignment as close to zero as I...

I got my alignment as close to zero as I could.

In addition to resolving your toe out problem, you might want to check your gear leg bolts are tight. At 50 hours my RV-8 started to jump to the...
Forum: RV-10 12-30-2021, 09:43 PM
Replies: 18
Views: 1,210
Posted By Carl Froehlich
I did not like the option to mount the comm...

I did not like the option to mount the comm antennas under the rear seat or baggage area - for the restricted access as has been discussed.

I mounted them fore and aft under the tunnel, one on each...
Forum: RV General Discussion/News 12-30-2021, 11:42 AM
Replies: 31
Views: 2,855
Posted By Carl Froehlich
This is a real pain. If you follow the...

This is a real pain. If you follow the instructions you will do want is needed, but add a lot of unnecessary work. If you skip around to take advantage of the full size holes, you can make...
Forum: RV-10 12-30-2021, 11:30 AM
Replies: 26
Views: 6,420
Posted By Carl Froehlich
Easy to have two PC-625 batteries mounted in the...

Easy to have two PC-625 batteries mounted in the standard location and create two independent power feeds to the plane. With some thought, you can have a very redundant electrical power system that...
Forum: RV-7/7A 12-29-2021, 04:44 PM
Replies: 20
Views: 1,497
Posted By Carl Froehlich
A lot of comparing to winds aloft ADS-B data. ...

A lot of comparing to winds aloft ADS-B data. Multiple data takes are needed.

Carl
Forum: RV General Discussion/News 12-29-2021, 04:31 PM
Replies: 31
Views: 2,855
Posted By Carl Froehlich
For similar load and flight conditions, standard...

For similar load and flight conditions, standard 170kt cruise at some altitude above 6K’:
- RV-14 will burn 9-10 gph
- RV-10 will burn 11-12 gph

Ive gotten the RV-14A down to 8gph or so above 11K’ ...
Forum: RV-7/7A 12-29-2021, 04:23 PM
Replies: 20
Views: 1,497
Posted By Carl Froehlich
The short answer, yes. Off a few degrees high...

The short answer, yes.

Off a few degrees high will:
- Have an erroneous high TAS reading (standard EFIS function).
- The high TAS reading will yield wind calculations that are off both in amplitude...
Forum: RV General Discussion/News 12-29-2021, 01:23 PM
Replies: 31
Views: 2,855
Posted By Carl Froehlich
Given the option i will fly a 10 over a 14. I...

Given the option i will fly a 10 over a 14. I have time in both and find the 10 a better ride.

Depending on your day job, my rough estimate is the 10 will add a year to your build.

Carl
Forum: RV-14 12-29-2021, 12:06 PM
Replies: 6
Views: 961
Posted By Carl Froehlich
I vote not needed. ~1400 hours flying RVs with...

I vote not needed. ~1400 hours flying RVs with two axis SkyView autopilots and very happy.

For that matter I have never found a need for a rudder trim servo.

Carl
Forum: RV-12/RV-12iS 12-29-2021, 10:42 AM
Replies: 26
Views: 3,099
Posted By Carl Froehlich
Some thoughts: - Antenna cleaning. Always a good...

Some thoughts:

- Antenna cleaning. Always a good first step. For belly mounted antennas exhaust gas plating out on the antenna base can establish an unwanted (and noisy) coupling between the...
Forum: RV Ongoing Maintenance Issues 12-28-2021, 02:09 PM
Replies: 5
Views: 465
Posted By Carl Froehlich
Use the adapter needed for your engine. For most...

Use the adapter needed for your engine. For most people:
- Parallel valve Lycoming; short adapter. Goes well the NGK BR8ES plugs.
- Angle head Lycoming; long adapter. Goes with Denso IKH27...
Forum: RV-8/8A 12-28-2021, 10:20 AM
Replies: 19
Views: 2,512
Posted By Carl Froehlich
I suggest you consider ANY option other than a...

I suggest you consider ANY option other than a jump start. If you abused your battery to the point it no longer cranks the engine, charge it. If you abused your battery to damage reserve capacity...
Forum: RV General Discussion/News 12-26-2021, 10:48 AM
Replies: 9
Views: 1,054
Posted By Carl Froehlich
The short answer is yes, Jimmy is hard at work to...

The short answer is yes, Jimmy is hard at work to both meet existing orders, and to bring new/updated products out. These will include a much easier plenum package as well as a new RV-14 and RV-10...
Forum: RV-8/8A 12-25-2021, 01:25 PM
Replies: 8
Views: 756
Posted By Carl Froehlich
I suggest you post a note to buy one. They come...

I suggest you post a note to buy one. They come with every trim kit, but many people no longer use them as the trim servos read out on their EFIS display.

Carl
Forum: RV-14 12-24-2021, 04:10 PM
Replies: 16
Views: 5,271
Posted By Carl Froehlich
Basic question, does the elevator trim tab have...

Basic question, does the elevator trim tab have the required up/down deflection as required in the plans?

Outside chance, but did someone added a shim under the Horizontal Stabilizer forward spar? ...
Forum: RV General Discussion/News 12-24-2021, 04:03 PM
Replies: 15
Views: 2,328
Posted By Carl Froehlich
But, some systems may have this switching...

But, some systems may have this switching function built in. For example:
- Dynon SkyView autopilot module. It does the trim switching when using the standard Infinity Grip top hat as well as...
Forum: RV-12/RV-12iS 12-24-2021, 11:36 AM
Replies: 26
Views: 3,099
Posted By Carl Froehlich
I strongly recommend everyone put an antenna...

I strongly recommend everyone put an antenna analyzer on their antennas at the end of the feedline going to the radios. Do this during the build and anytime you change something or have a radio...
Forum: Electrical Systems 12-22-2021, 10:34 AM
Replies: 7
Views: 772
Posted By Carl Froehlich
Without details I suspect holding a battery in...

Without details I suspect holding a battery in reserve is the same as a backup battery.

For an IFR install consider:
- Two identical batteries (I use PC-625 as they are a little lighter and have...
Forum: Electrical Systems 12-21-2021, 02:36 PM
Replies: 7
Views: 772
Posted By Carl Froehlich
Note - I never used the phrase “backup battery”...

Note - I never used the phrase “backup battery” or “backup battery buss”. Adding a second ship’s battery just as a backup leaves out most of the advantages of a two battery system design.

PM me...
Forum: Electrical Systems 12-21-2021, 01:35 PM
Replies: 7
Views: 772
Posted By Carl Froehlich
Recommend you consider two ship batteries. That...

Recommend you consider two ship batteries. That provides option to eliminate the plethora of backup batteries, provides for increase reserve electrical capacity (the typical new backup battery 45...
Forum: RV-10 12-21-2021, 11:13 AM
Replies: 12
Views: 1,292
Posted By Carl Froehlich
Yes. Standard double sided (thin) carpet tape. ...

Yes. Standard double sided (thin) carpet tape. Good for single use only.

Carl
Forum: RV-10 12-21-2021, 09:38 AM
Replies: 12
Views: 1,292
Posted By Carl Froehlich
I used a nice indoor/outdoor option from the...

I used a nice indoor/outdoor option from the Aviation Department at Lowes. I only put it on the floors - and the rest of the interior is paint (no Lexus stuff). It worked for my needs and easy to...
Forum: RV-8/8A 12-21-2021, 09:07 AM
Replies: 21
Views: 1,641
Posted By Carl Froehlich
Recommend you do not do anything other than the...

Recommend you do not do anything other than the per-plans counter weight pipe.

Balance is about flutter, not about static gravity balance. Adding more weight could push you the wrong...
Forum: RV-7/7A 12-19-2021, 09:16 AM
Replies: 3
Views: 352
Posted By Carl Froehlich
I suspect you forgot to put in the ~3/4” 90...

I suspect you forgot to put in the ~3/4” 90 degree bend in the end of the float wire that goes into the sender bracket center hole (in other words, you put two bends in the float arm, not just the...
Forum: RV-10 12-19-2021, 08:51 AM
Replies: 17
Views: 1,266
Posted By Carl Froehlich
Thanks all for the responses. I’ll proceed with...

Thanks all for the responses. I’ll proceed with these brakes and wheels, along with the James wheel pants.

I’ll be using a new cowl from James that is made for the Cold Air Sump IO-540. The first...
Forum: Glass Cockpit 12-18-2021, 02:15 PM
Replies: 20
Views: 1,588
Posted By Carl Froehlich
Find a builder who did his own panel (brand and...

Find a builder who did his own panel (brand and such that you like) but is now flying. He may be looking for another project.

I did a couple like this before starting the RV-8 project, and suspect...
Forum: RV-10 12-18-2021, 02:10 PM
Replies: 17
Views: 1,266
Posted By Carl Froehlich
Thanks Bob, but what size tire? The stock...

Thanks Bob, but what size tire? The stock 15x6.00-6 or a standard 6.00x6?

Carl
Forum: Electrical Systems 12-18-2021, 01:33 PM
Replies: 15
Views: 1,063
Posted By Carl Froehlich
Exactly correct. Some other rules: - Monitor...

Exactly correct. Some other rules:
- Monitor battery terminal voltage anytime a charger is connected.
- Never leave a charger on a battery unattended.
- If you abuse your battery (e.g. leave a...
Forum: RV-10 12-18-2021, 01:20 PM
Replies: 17
Views: 1,266
Posted By Carl Froehlich
What size tire are you using? I will be using...

What size tire are you using?

I will be using the James Aircraft wheel pant on this RV-10 build like I did the first. They have a significantly smaller frontal cross section compared to the very...
Forum: RV-7/7A 12-18-2021, 01:13 PM
Replies: 1
Views: 419
Posted By Carl Froehlich
Recommend just buying the fuel pickup with screen...

Recommend just buying the fuel pickup with screen from Van’s instead of making the slotted pickup.
https://store.vansaircraft.com/fuel-tank-pickup-with-screen-f-fuel-tank-pu-w-scrn.html

Carl
Forum: RV-10 12-18-2021, 12:38 PM
Replies: 17
Views: 1,266
Posted By Carl Froehlich
MATCO WHLWI600XLT-2

Anyone using this MATCO wheel and three piston brake? If so, any observations?

http://www.matcomfg.com/WHLBRKWI600RV10CONFIG-idv-3814-4.html

Carl
Forum: Traditional Aircraft Engines 12-16-2021, 08:15 PM
Replies: 34
Views: 2,740
Posted By Carl Froehlich
Not familiar with such changes. I can report my...

Not familiar with such changes. I can report my install has been dead on accurate, and as a general rule I avoid 90 degree fittings in fuel lines if I can.

Carl
Forum: Electrical Systems 12-16-2021, 07:37 PM
Replies: 12
Views: 1,482
Posted By Carl Froehlich
No - absolutely not ready to fly. Forget your...

No - absolutely not ready to fly.

Forget your low voltage warning - that can be set at any value. Your data that voltage never got above 12.2 volts says you have a problem. Normal bus voltage for...
Forum: Traditional Aircraft Engines 12-16-2021, 06:54 PM
Replies: 34
Views: 2,740
Posted By Carl Froehlich
I suggest builders not to use 90 degree fittings...

I suggest builders not to use 90 degree fittings on the cube (per the instructions). This fitting provides for a 90 degree bend, but not abruptly like with the standard 90 degree...
Forum: RV-7/7A 12-16-2021, 02:12 PM
Replies: 20
Views: 1,497
Posted By Carl Froehlich
Correct - as was my experience. Better is to...

Correct - as was my experience. Better is to avoid icing all together (and I do) but sometimes icing finds you anyway. I do mostly high IFR cross country of late (above the layer) so I’m very...
Forum: RV General Discussion/News 12-16-2021, 01:37 PM
Replies: 85
Views: 13,305
Posted By Carl Froehlich
Just great. I spent a couple of weeks going over...

Just great. I spent a couple of weeks going over the RV-10 finish kit to delete stuff but did not yet send it in. I would have saved more money just getting the kit as is.

Carl
Forum: RV-10 12-16-2021, 11:34 AM
Replies: 26
Views: 7,111
Posted By Carl Froehlich
I put in a cabin roof liner on my first RV-10 aft...

I put in a cabin roof liner on my first RV-10 aft of the doors. I consider this one of my bigger mistakes. They just do not last, especially in the Florida sun.

The new RV-10 will have to cabin...
Forum: RV-10 12-16-2021, 11:00 AM
Replies: 26
Views: 7,111
Posted By Carl Froehlich
I made these out of cheap clip-on LED battery...

I made these out of cheap clip-on LED battery powered lights. I cut off the battery and clip, replaced the LEDs with the ones I wanted (the housing was the key part). Done.

I may have spent...
Forum: RV-7/7A 12-16-2021, 10:11 AM
Replies: 20
Views: 1,497
Posted By Carl Froehlich
I tried all the OAT probe mounting places listed....

I tried all the OAT probe mounting places listed. The only one that did not have a significant error (as reading was 5-10 degrees higher than actual) was just inside the wing bell crank access...
Forum: RV-8/8A 12-16-2021, 09:37 AM
Replies: 6
Views: 694
Posted By Carl Froehlich
Same for me. First RV-8A now at 20 years and the...

Same for me. First RV-8A now at 20 years and the pop rivet part of the floor has never been out. That plane has had five panel updates, new autopilot servos installed, ADS-B receiver install by the...
Forum: RV-4 12-14-2021, 05:46 PM
Replies: 16
Views: 1,536
Posted By Carl Froehlich
As the first step I suggest clamping the ailerons...

As the first step I suggest clamping the ailerons as I discussed. Now measure the gap between the top of the aileron and the bottom of the wing skin. I make up “feeler” gauges of flat aluminum...
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