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Search: Posts Made By: Carl Froehlich
Forum: RV General Discussion/News Today, 03:54 PM
Replies: 12
Views: 281
Posted By Carl Froehlich
Mac, I suggest you have some basic issues that...

Mac,

I suggest you have some basic issues that need to be fixed before you go chasing possible fuel line heat causing your pressure drop.

Looking at the photo, I note that you have the fuel line...
Forum: RV-8/8A Today, 01:07 PM
Replies: 20
Views: 1,018
Posted By Carl Froehlich
Nope - looking at your photo your fuel flow...

Nope - looking at your photo your fuel flow sender (red cube) is on the cabin side of the firewall, not mounted at all - the photo suggest it is suspended just by the fuel lines. That alone is a...
Forum: RV-8/8A Today, 11:45 AM
Replies: 20
Views: 1,018
Posted By Carl Froehlich
Typical install is the boost pump and fuel...

Typical install is the boost pump and fuel selector on the cabin side of the firewall. Fuel filter may or may not be.

Fuel flow sender on the engine side of the firewall, between the mechanical...
Forum: RV-8/8A Today, 09:45 AM
Replies: 20
Views: 1,018
Posted By Carl Froehlich
If you are going to rework the red cube, then use...

If you are going to rework the red cube, then use the opportunity to move it to a better location. I suggest just after the mechanical fuel pump, using adel clamps to mount it on the engine mount -...
Forum: RV-8/8A Yesterday, 08:34 AM
Replies: 20
Views: 1,018
Posted By Carl Froehlich
Look for the telltale blue stains on the fuel...

Look for the telltale blue stains on the fuel runs aft of the firewall, including wing root. Donít forget to look at the vent lines as well.

Here a small air leak will show up as a fuel smell after...
Forum: RV Ongoing Maintenance Issues 07-02-2022, 02:28 PM
Replies: 4
Views: 332
Posted By Carl Froehlich
Use the pin for the hinges you have. Most have a...

Use the pin for the hinges you have. Most have a smaller pin for the horizontal side hinges, larger diameter for aft cowl to fuselage hinge. The top cowl pin can is the smaller (but uses larger...
Forum: Traditional Aircraft Engines 07-02-2022, 07:40 AM
Replies: 9
Views: 742
Posted By Carl Froehlich
Another option is to use this as opportunity to...

Another option is to use this as opportunity to install the nice AirFlow Performance injection system.

On my first RV I got a O-360 engine from Vanís, but that was before they sold injected 180hp...
Forum: RV Building Tips/Techniques 07-01-2022, 03:28 PM
Replies: 8
Views: 531
Posted By Carl Froehlich
I recommend mounting the ADS-b receiver aft - as...

I recommend mounting the ADS-b receiver aft - as in on the bottom of the fuselage very near the ADS-b antenna. The aft location makes it easier to maintain the recommended antenna separations. I...
Forum: RV-8/8A 07-01-2022, 12:46 PM
Replies: 10
Views: 764
Posted By Carl Froehlich
The Aerosport aluminum replacement parts are nice...

The Aerosport aluminum replacement parts are nice - but way too pricey for me. Iíll live with the plastic.

Carl
Forum: Electrical Systems 07-01-2022, 11:13 AM
Replies: 2
Views: 257
Posted By Carl Froehlich
You have identified example of the "one size fits...

You have identified example of the "one size fits all" Van's wiring kits.

The AeroLED nav/strobes provide little to no RFI if installed correctly. The easiest way to do this is use of a three #20...
Forum: RV-8/8A 07-01-2022, 10:43 AM
Replies: 10
Views: 764
Posted By Carl Froehlich
The new plastic caps that Van's now uses can be...

The new plastic caps that Van's now uses can be opened with a finger.

For me however I hate them. They look cheap, can't be polished and I had one fail on me when ferrying an RV-14A. But I have...
Forum: Glass Cockpit 06-30-2022, 12:03 PM
Replies: 9
Views: 541
Posted By Carl Froehlich
Just have your print scale setting to 100%

Just have your print scale setting to 100%
Forum: Glass Cockpit 06-30-2022, 11:14 AM
Replies: 9
Views: 541
Posted By Carl Froehlich
My experience is it is as accurate as your...

My experience is it is as accurate as your ability to read the scale.

I used this to fix two analog airspeed indicators that read more than 5 knots off of actual (the standard ones you get from...
Forum: Glass Cockpit 06-30-2022, 10:15 AM
Replies: 9
Views: 541
Posted By Carl Froehlich
A difference in airspeed begs the question, which...

A difference in airspeed begs the question, which one is right (or less wrong)?

End the pain and find out. A few minutes of work will produce an amazingly accurate Manometer to verify airspeed...
Forum: RV Ongoing Maintenance Issues 06-28-2022, 10:52 AM
Replies: 8
Views: 647
Posted By Carl Froehlich
You can also use the shank of an appropriate...

You can also use the shank of an appropriate sized drill bit. Just cut to length,

Carl
Forum: RV General Discussion/News 06-28-2022, 09:28 AM
Replies: 17
Views: 739
Posted By Carl Froehlich
How the fuel flow sender is mounted makes a...

How the fuel flow sender is mounted makes a difference. The rules I stick to:
- Do not mount on the engine. This goes against how Vanís tells you to mount it on the RV-14 - which I had first hand...
Forum: Traditional Aircraft Engines 06-27-2022, 08:55 AM
Replies: 17
Views: 1,906
Posted By Carl Froehlich
Did you measure plug resistance when you had them...

Did you measure plug resistance when you had them out?

You may recall a period of time when Champion aviation plugs failed shortly after installation (they changed center electrode design). Perhaps...
Forum: RV-14 06-27-2022, 08:46 AM
Replies: 29
Views: 1,595
Posted By Carl Froehlich
I use Infinity grips. Flap is a toggle switch...

I use Infinity grips. Flap is a toggle switch operated by the thumb.

On the RV-10 I had it on both the pilot and co-pilot grips (as well as the top hat trim control). On the panel I added a...
Forum: Mid-Atlantic 06-26-2022, 08:34 AM
Replies: 16
Views: 2,429
Posted By Carl Froehlich
I took a photo of a very nice RV-8 (N69JV). ...

I took a photo of a very nice RV-8 (N69JV). Registration says it belongs to Frankie Raymond. If anyone knows him please ask him to contact me. The plane has a great color red and silver that Iíd...
Forum: Painting your RV 06-25-2022, 12:40 PM
Replies: 13
Views: 621
Posted By Carl Froehlich
As far as I know, it is still the Naphtha based...

As far as I know, it is still the Naphtha based fuel that cleans with no residue. Also great for final cleaning of gas tanks before the pro-seal process.

Carl
Forum: Painting your RV 06-24-2022, 06:22 PM
Replies: 13
Views: 621
Posted By Carl Froehlich
I find wiping down with Coleman fuel before...

I find wiping down with Coleman fuel before shooting primer to work well.

Carl
Forum: My RV Build Project 06-24-2022, 09:59 AM
Replies: 3
Views: 592
Posted By Carl Froehlich
For all three of my RV projects the design allows...

For all three of my RV projects the design allows for full panel removal in just a few minutes. This provides for easy maintenance, panel updates and such.

The trick it to take the time now to...
Forum: RV Ongoing Maintenance Issues 06-23-2022, 04:15 PM
Replies: 3
Views: 288
Posted By Carl Froehlich
This is not about Transmit interlock. As you...

This is not about Transmit interlock.

As you state, when transmitting on the SL30 the 480 also transmit. You have your PTT connected to both radios - so both transmit.

The Comm 1, Comm 2 switch...
Forum: RV General Discussion/News 06-23-2022, 09:53 AM
Replies: 27
Views: 2,610
Posted By Carl Froehlich
Tim, Iíve been down this road - twice. I built...

Tim,

Iíve been down this road - twice. I built the 8A and sold it shortly after the 10 was flying as I decided I did not have time for two planes (day job got in the way). The 10 was everything I...
Forum: Electrical Systems 06-22-2022, 11:42 AM
Replies: 10
Views: 726
Posted By Carl Froehlich
I suggest deferring all wing wiring until final...

I suggest deferring all wing wiring until final wing to fuselage assembled.

Carl
Forum: Traditional Aircraft Engines 06-21-2022, 08:18 AM
Replies: 19
Views: 1,242
Posted By Carl Froehlich
+1. This is reason why I ordered my new Cold...

+1.
This is reason why I ordered my new Cold Air Sump IO-540 with standard 8.5 pistons. The gain in engine efficiency going to 9 or 10 pistons is in the grass when you overlay projected avgas...
Forum: RV-10 06-19-2022, 11:14 AM
Replies: 7
Views: 736
Posted By Carl Froehlich
Vas, Donít change anything. As you can see from...

Vas,

Donít change anything. As you can see from your high fuel flow, going from stock 0.028Ē to an average of 0.025Ē injector nozzles provides more than enough fuel. Your low CHTs and EGTs...
Forum: RV-10 06-19-2022, 07:56 AM
Replies: 2
Views: 664
Posted By Carl Froehlich
Not your fault - put a claim in with the shipping...

Not your fault - put a claim in with the shipping company and also notify Vanís. Replace the part.

There will be ample opportunity to fix your own mistakes during the build, you need not add...
Forum: Alternative Engines 06-17-2022, 02:43 PM
Replies: 42
Views: 3,892
Posted By Carl Froehlich
I could not agree more. Take a standard IO-360,...

I could not agree more.

Take a standard IO-360, replace the heads to incorporate direct injection, enable all the engine controls like I have on my 11.3 to 1 compression Colorado engine that burns...
Forum: Traditional Aircraft Engines 06-17-2022, 12:06 PM
Replies: 1
Views: 433
Posted By Carl Froehlich
AirFlow Performane FM150C

A while back I replaced the stock AVSTAR fuel manager with the new AirFlow Performance FM150C on my IO-360-M1B. I can report gains in performance (reduced takeoff roll and a knot or two more in LOP...
Forum: Glass Cockpit 06-17-2022, 08:50 AM
Replies: 1
Views: 572
Posted By Carl Froehlich
Question for the Garmin expert

Looking at the GNC-355 for the new project, adding a stand alone NAV/Comm.

My question; with the GNC-355 selected as the flight plan source, will it provide the LOC/ILS approach and missed...
Forum: Alternative Engines 06-16-2022, 08:25 AM
Replies: 42
Views: 3,892
Posted By Carl Froehlich
As a dreamer, I always wanted a better engine. ...

As a dreamer, I always wanted a better engine. The Lycoming does quite well for our applications, but fuel requirements are the Achilles Heal.

What I would like to see:
- A two stroke diesel. Two...
Forum: RV General Discussion/News 06-15-2022, 07:03 PM
Replies: 12
Views: 1,010
Posted By Carl Froehlich
As previously mentioned, the configuration module...

As previously mentioned, the configuration module is mounted in the tray, not the unit. I suggest you ask Garmin about how hard it would be to get a second configuration module for a second tray.

I...
Forum: RV-14 06-15-2022, 11:02 AM
Replies: 15
Views: 1,569
Posted By Carl Froehlich
I suggest for 90% of RV builders aftermarket pMag...

I suggest for 90% of RV builders aftermarket pMag add on gizmos offer little practical value.

Set the pMag with jumper in (four cylinder) or max of 9 degrees advance (six cylinder) and fly on. Do...
Forum: RV-10 06-15-2022, 07:59 AM
Replies: 17
Views: 3,110
Posted By Carl Froehlich
This is a shame. This flap position system (note...

This is a shame. This flap position system (note - position not position sensor) was an eloquent way to simplify flap operation and wiring. For me it totally eliminated the need for a flap position...
Forum: RV General Discussion/News 06-14-2022, 02:43 PM
Replies: 4
Views: 430
Posted By Carl Froehlich
Ed, There is a CFI at Dogwood (VA42) with RV...

Ed,

There is a CFI at Dogwood (VA42) with RV experience. Send me a PM and Iíll hook you up.

Carl
Forum: Electronic Ignition Systems 06-14-2022, 02:34 PM
Replies: 48
Views: 7,828
Posted By Carl Froehlich
David, A weak battery is a weak battery. This...

David,

A weak battery is a weak battery. This is the root problem. Your running additional wires may mitigate but does not address this problem.

I can report that my dual PC-625 battery install...
Forum: Electrical Systems 06-14-2022, 09:06 AM
Replies: 51
Views: 9,205
Posted By Carl Froehlich
Scott - thanks for transforming my horrible line...

Scott - thanks for transforming my horrible line diagram into something far better.

Some thoughts:
- As Scott discusses, adding the two Engine Busses addressed ship electrical power dependent...
Forum: Electrical Systems 06-13-2022, 11:20 AM
Replies: 3
Views: 464
Posted By Carl Froehlich
Anything over an amp or so requires a heat sink. ...

Anything over an amp or so requires a heat sink. That can be something as simple as a screw through the case to a bulkhead or such (if you have a diode with an insulated case).

Assuming you want...
Forum: Glass Cockpit 06-13-2022, 07:04 AM
Replies: 6
Views: 472
Posted By Carl Froehlich
I too worry about avionics being sensitive to...

I too worry about avionics being sensitive to engine start. For my dual SkyView and GTN-650 install, start process is:
- Left avionics on. This powers up one SkyView display (with EMS) and Comm #2...
Forum: RV-8/8A 06-12-2022, 08:37 AM
Replies: 2
Views: 478
Posted By Carl Froehlich
I suggest you get a W&B from someone with the...

I suggest you get a W&B from someone with the same engine and gear (Grove gear makes a big difference) and who used real scales. From that you can use a sharp pencil to see how the W&B changes with...
Forum: RV General Discussion/News 06-12-2022, 08:23 AM
Replies: 38
Views: 3,830
Posted By Carl Froehlich
This happened to an RV-8 builder in Phase 1 many...

This happened to an RV-8 builder in Phase 1 many years ago. One flap did not come up. The rod was not the cause.

He was able to fly the plane (at a reduced speed) and safely land.

Carl
Forum: RV General Discussion/News 06-11-2022, 09:40 AM
Replies: 38
Views: 3,830
Posted By Carl Froehlich
Partial flap speed is higher than the standard...

Partial flap speed is higher than the standard 87kt specification but I do not have any numbers for you. I vaguely recall something from Vanís on this.

I have the Showplanes flap position system...
Forum: RV General Discussion/News 06-11-2022, 08:15 AM
Replies: 38
Views: 3,830
Posted By Carl Froehlich
Time for a full inspection. Off the top of my...

Time for a full inspection. Off the top of my head:
- With the flaps fully up, use a straight edge across the wing skin and flaps. Look for variances between the two flaps and for variances inboard...
Forum: Electronic Ignition Systems 06-10-2022, 01:25 PM
Replies: 48
Views: 7,828
Posted By Carl Froehlich
Walt, quite a blast. Some thoughts: - Better...

Walt, quite a blast. Some thoughts:
- Better plugs as in a wider gap. Better plugs as the higher spark reduced fouling. If I never have to clean an aviation plug again it will be too soon.
- Fuel...
Forum: Electronic Ignition Systems 06-10-2022, 11:18 AM
Replies: 48
Views: 7,828
Posted By Carl Froehlich
Reduce fuel burn is the gain with pMags. That...

Reduce fuel burn is the gain with pMags. That and easier starts, better plugs, dirt simple timing and such.

Carl
Forum: RV-8/8A 06-07-2022, 12:18 PM
Replies: 22
Views: 2,443
Posted By Carl Froehlich
Two issues: - What you propose is a phased array....

Two issues:
- What you propose is a phased array. If you are real good at antenna design, have the right test equipment and a range to measure performance, it can be done. In other words for us...
Forum: RV General Discussion/News 06-07-2022, 12:03 PM
Replies: 33
Views: 11,341
Posted By Carl Froehlich
I recommend running with the jumper in,...

I recommend running with the jumper in, regardless of the fuel used. Jumper in provides up to 9 degrees of timing advance - and all my reading tells me there is nothing to be gained with more...
Forum: RV-8/8A 06-06-2022, 07:48 PM
Replies: 22
Views: 2,443
Posted By Carl Froehlich
Iím hopeful you donít have a dog visiting your...

Iím hopeful you donít have a dog visiting your hangar at any point.

I keep ďdoggie eyeball protectorsĒ on my antennas mounted on the belly when parked. Easy capped tubing with a red ribbon slipped...
Forum: Traditional Aircraft Engines 06-06-2022, 07:15 AM
Replies: 33
Views: 2,073
Posted By Carl Froehlich
I suggest you have recreate the oil cooling issue...

I suggest you have recreate the oil cooling issue on the RV-14 running the IO-390-EXP111 engine - and the reason Vanís went to a 5Ē hose feeding the oil cooler.

As your CHTs are good, there is air...
Forum: RV-7/7A 06-05-2022, 03:58 PM
Replies: 5
Views: 541
Posted By Carl Froehlich
+1. I guarantee no one will ever notice the...

+1. I guarantee no one will ever notice the larger rivet head.

Note - Iíve seen this when a builder uses a drill with way too high a speed. The #40 drill bit starts going around in a elliptical...
Forum: Autopilots 06-05-2022, 11:01 AM
Replies: 9
Views: 716
Posted By Carl Froehlich
For this abnormal condition, why not just open...

For this abnormal condition, why not just open the AutoPilot servo breaker to kill power to the servo?

Carl
Forum: VAF Classifieds (posts in here deleted after 30 days) 06-05-2022, 10:52 AM
Replies: 1
Views: 363
Posted By Carl Froehlich
For both RV-10s I used a standard back rivet...

For both RV-10s I used a standard back rivet plate with a wood shim taped to the bottom to create the needed angle. It slides easily in between the skins and does the job.

Carl
Forum: RV Building Tips/Techniques 06-05-2022, 10:47 AM
Replies: 10
Views: 1,089
Posted By Carl Froehlich
I use the simple air/oil separator from...

I use the simple air/oil separator from ACS:
https://www.aircraftspruce.com/catalog/eppages/hboilbreather.php

The breather line extends down to just above the exhaust pipe. The 1/4Ē oil drain line...
Forum: Traditional Aircraft Engines 06-05-2022, 10:30 AM
Replies: 33
Views: 2,073
Posted By Carl Froehlich
Jake, What oil cooler are you running...

Jake,

What oil cooler are you running now?

Assuming you have no other issues, perhaps a better cooler is the first option. I like AirFlow 2004X for 180hp parallel valve Lycoming engines. The...
Forum: Glass Cockpit 06-04-2022, 01:05 PM
Replies: 15
Views: 1,182
Posted By Carl Froehlich
Is there a reason the autopilot module takes up...

Is there a reason the autopilot module takes up the most prime real estate on the panel?

Iíd move the EFIS up to the top, autopilot module below it.

Carl
Forum: GPS 06-04-2022, 10:48 AM
Replies: 33
Views: 6,746
Posted By Carl Froehlich
Or the older aviators will wear the ďI flew IFR...

Or the older aviators will wear the ďI flew IFR with steam gauges and spinning iron gyrosĒ badge of honor. For me, I would die trying to fly a old school six pack.

Years ago I waited until the...
Forum: Traditional Aircraft Engines 06-03-2022, 12:35 PM
Replies: 9
Views: 1,028
Posted By Carl Froehlich
The snorkel Iím talking about is the stock...

The snorkel Iím talking about is the stock snorkel for the four cylinder Lycoming engines, except the IO-390-EXP111.

The snorkel mods you did for the IO-390-EXP111 is the basis for taking this...
Forum: RV-7/7A 06-03-2022, 09:51 AM
Replies: 21
Views: 1,595
Posted By Carl Froehlich
What ignition, set at what timing? Carl

What ignition, set at what timing?

Carl
Forum: Autopilots 06-02-2022, 09:28 AM
Replies: 9
Views: 716
Posted By Carl Froehlich
What I do for AP servo wiring: - One four #22...

What I do for AP servo wiring:
- One four #22 conductor shielded wire for the two network connections
- One #20 single wire for power
- One #20 single wire for ground
- One #22 single wire for AP...
Forum: Traditional Aircraft Engines 06-02-2022, 09:14 AM
Replies: 9
Views: 1,028
Posted By Carl Froehlich
Here is an update: - Iíve been flying (RV-8 with...

Here is an update:
- Iíve been flying (RV-8 with IO-360-M1B) with the new FM-150C install for a couple of long cross countries (replaced the stock AVSTAR). I find it provides better performance...
Forum: Autopilots 06-01-2022, 03:55 PM
Replies: 12
Views: 1,277
Posted By Carl Froehlich
John, I suggest flying with the Autopilot...

John,

I suggest flying with the Autopilot default settings before any changes.
My three RVs all still have default autopilot settings and they are all rock steady.

Carl
Forum: Electrical Systems 06-01-2022, 10:24 AM
Replies: 15
Views: 861
Posted By Carl Froehlich
Just my experience with other builders having...

Just my experience with other builders having batteries die before their time. Perhaps you are just more rigorous in process than most.

I also note that a standard Odyssey battery does quite well...
Forum: RV General Discussion/News 06-01-2022, 09:41 AM
Replies: 13
Views: 989
Posted By Carl Froehlich
Phil, While you are upgrading, I recommend you...

Phil,

While you are upgrading, I recommend you do all this wiring with the panel on the bench. From that you can add connectors to mate it to the rest of the plane. This will pay dividends when...
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