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Search: Posts Made By: Carl Froehlich
Forum: RV General Discussion/News Today, 02:02 PM
Replies: 9
Views: 223
Posted By Carl Froehlich
+1 Do not look at just power to your ignitions,...

+1

Do not look at just power to your ignitions, look as total system design. Two equal batteries provides power for 2+ hours, a lot more than the typical EFIS wimpy backup battery maybe doing 30...
Forum: RV General Discussion/News Today, 07:05 AM
Replies: 9
Views: 223
Posted By Carl Froehlich
No, do not wire like this. You have set up for a...

No, do not wire like this. You have set up for a single EI failure (internal short) to open both breakers. The fan will stop.

Have one EI on each battery, each on its own, single breaker. If your...
Forum: VAF Classifieds (posts in here deleted after 30 days) Yesterday, 05:38 PM
Replies: 3
Views: 407
Posted By Carl Froehlich
That is a deal!! Wish I need it. Carl

That is a deal!! Wish I need it.

Carl
Forum: RV-8/8A Yesterday, 04:26 PM
Replies: 2
Views: 133
Posted By Carl Froehlich
I did not like the countersink instructions on...

I did not like the countersink instructions on the 14 wing walk - I used tank dimple dies for the wing walk doubler and ribs, and normal dimple dies for the wing skin.

I did skip a few hole on the...
Forum: Electrical Systems Yesterday, 07:25 AM
Replies: 5
Views: 421
Posted By Carl Froehlich
I do not use #24 wire anywhere - other than four...

I do not use #24 wire anywhere - other than four conductor shielded wire for headphone jacks, ADS-B receiver, trim motors and such. I consider #24 to be too fragile for aircraft use unless it is...
Forum: RV General Discussion/News 04-05-2020, 07:32 PM
Replies: 14
Views: 1,271
Posted By Carl Froehlich
I had to do a similar repair on my first RV - it...

I had to do a similar repair on my first RV - it slipped off the wing rack and the steel support brace ripped the leading edge.

So you know, it is not hard to replace the skin and the rib. For me...
Forum: Electronic Ignition Systems 04-04-2020, 08:29 AM
Replies: 35
Views: 5,360
Posted By Carl Froehlich
Dan, A lot of people, me included, value your...

Dan,

A lot of people, me included, value your opinion. Here however you may inadvertently let builders think that an ignition install other that traditional mags or pMags does not require careful...
Forum: RV General Discussion/News 04-01-2020, 01:07 PM
Replies: 4
Views: 234
Posted By Carl Froehlich
Not hard to make if you find a suitable bar...

Not hard to make if you find a suitable bar stock.
Carl

https://i.postimg.cc/nzK5YCZm/Machined-Manifold.jpg
Forum: Glass Cockpit 03-31-2020, 03:17 PM
Replies: 38
Views: 1,913
Posted By Carl Froehlich
As others have pointed out, recommend: - Moving...

As others have pointed out, recommend:
- Moving the TSO navigator as high as possible. The display is already hard to read - no need to make it harder.
- The GTN-650 is the best of all the bad...
Forum: RV Building Tips/Techniques 03-29-2020, 07:17 AM
Replies: 20
Views: 1,125
Posted By Carl Froehlich
Most builders have nav/strobes mounted on the...

Most builders have nav/strobes mounted on the tips, some included landing lights (like me). Add a VOR antenna to one wing and there is ample reason to be able to remove the tips for future...
Forum: RV-8/8A 03-28-2020, 07:50 AM
Replies: 25
Views: 1,334
Posted By Carl Froehlich
This is opposite of my experience. My first RV...

This is opposite of my experience. My first RV (8A) started off life with a FP prop. After 300 hours I back fitted the very nice Hartzell BA CS prop. Performance dramatically improved across the...
Forum: RV General Discussion/News 03-27-2020, 11:37 AM
Replies: 7
Views: 515
Posted By Carl Froehlich
Trim the rib a touch? A rotary file or perhaps...

Trim the rib a touch? A rotary file or perhaps just a sanding disk in a Dremel should do the trick.

Carl
Forum: RV General Discussion/News 03-27-2020, 10:50 AM
Replies: 4
Views: 342
Posted By Carl Froehlich
Here you...

Here you...
Forum: RV General Discussion/News 03-26-2020, 12:05 PM
Replies: 4
Views: 342
Posted By Carl Froehlich
Travis, I use a standard 1/4” AN bulkhead...

Travis,

I use a standard 1/4” AN bulkhead fitting in the cabin. On the engine side of the fitting I run 1/4” aluminum tubing, the end of the tubing has a 3/16”” rivet with a #40 hole drilled in the...
Forum: RV General Discussion/News 03-25-2020, 11:59 AM
Replies: 2
Views: 231
Posted By Carl Froehlich
Thanks everyone for the feed. I scheduled a DAR...

Thanks everyone for the feed. I scheduled a DAR out of south/west Virginia.

Carl
Forum: RV General Discussion/News 03-25-2020, 07:53 AM
Replies: 2
Views: 231
Posted By Carl Froehlich
Need a DAR near Fredericksburg VA

After hours of working the new FAA site to apply for an airworthiness inspection, I get a call from the local FSDO that they are too busy. The FAA DAR directory is down so reaching out to VAF for a...
Forum: RV-14 03-23-2020, 12:31 PM
Replies: 9
Views: 864
Posted By Carl Froehlich
Correct. Mid position on the trim servo does not...

Correct. Mid position on the trim servo does not translate to the trim tab in neutral. The set up is designed to provide much more nose up trim than down. But if memory serves there was...
Forum: RV General Discussion/News 03-21-2020, 09:38 AM
Replies: 22
Views: 1,312
Posted By Carl Froehlich
Once the N number is used to register the...

Once the N number is used to register the aircraft, it is no longer "reserved". It follows the same rules as an aircraft with and Airworthiness Certificate in place.

Carl
Forum: Steam Gauges 03-17-2020, 05:33 PM
Replies: 16
Views: 2,121
Posted By Carl Froehlich
The suction cup is a standard one you can find at...

The suction cup is a standard one you can find at most hobby stores, Walmart, etc. Drill a 1/4” hole through the center of the cup, slide in a piece of 1/4” tubing and add some RTV to make the seal....
Forum: RV General Discussion/News 03-14-2020, 04:10 PM
Replies: 41
Views: 2,147
Posted By Carl Froehlich
If you must have an avionics master, then have...

If you must have an avionics master, then have two, one for each half of the panel (left EFIS, COMM #1, right EFIS, COMM #2, etc.).

Consider not wiring power to the panel via series from the...
Forum: RV General Discussion/News 03-14-2020, 03:07 PM
Replies: 10
Views: 663
Posted By Carl Froehlich
I don’t drill through the plexi and steel roll...

I don’t drill through the plexi and steel roll bar. This is what I do:
- Trim the glass to fit.
- Lightly run 3/4” masking tape over the steel roll bar and/canopy frame (RV-8).
- Place the glass...
Forum: RV-4 03-13-2020, 09:43 AM
Replies: 9
Views: 684
Posted By Carl Froehlich
You did not mention what brand gascolator. The...

You did not mention what brand gascolator.

The Andair gascolator has a relatively large, cylindrical and removable filter screen (it unscrews). If memory serves, this is a 40 micro filter.

If...
Forum: RV-12/RV-12iS 03-12-2020, 10:43 AM
Replies: 8
Views: 956
Posted By Carl Froehlich
I have a dual HDX install in the RV-8, and have...

I have a dual HDX install in the RV-8, and have been flying IFR behind SkyView displays for several years. While the HDX can be manipulated to simulate VNAV for an IFR approach, I recommend not...
Forum: Electrical Systems 03-12-2020, 07:16 AM
Replies: 5
Views: 531
Posted By Carl Froehlich
The B&C 20 amp alternator is a superior product,...

The B&C 20 amp alternator is a superior product, and when used with the B&C standby voltage regulator, normal installation has it running in parallel with your primary alternator. The standby...
Forum: Steam Gauges 03-11-2020, 04:09 PM
Replies: 16
Views: 2,121
Posted By Carl Froehlich
Or - use my static test rig and add a vacuum...

Or - use my static test rig and add a vacuum gauge, like this: https://www.amazon.com/HFS-Utility-Vacuum-Pressure-Blk-Steel/dp/B00VQSP2XA/ref=sr_1_3?keywords=‘Vacuum+gauge&qid=1583964448&sr=8-3

Carl
Forum: Steam Gauges 03-11-2020, 08:08 AM
Replies: 16
Views: 2,121
Posted By Carl Froehlich
Here is a simple rig to check for static leaks. ...

Here is a simple rig to check for static leaks. Harbor Freight parts and some assembly. I just used this on the new RV-8 project to verify the system tight - and sure enough found a fitting not...
Forum: RV-14 03-10-2020, 08:18 AM
Replies: 29
Views: 2,496
Posted By Carl Froehlich
The short answer is yes. Here is the mod I did...

The short answer is yes. Here is the mod I did on the RV-10 and RV-8: http://www.vansairforce.com/community/showthread.php?t=165701&highlight=Vent+line

Carl
Forum: RV-10 03-09-2020, 05:40 PM
Replies: 17
Views: 995
Posted By Carl Froehlich
Happened to me - when a National Guard C-130 did...

Happened to me - when a National Guard C-130 did a full power reverse taxi on the ramp right in front of me. The pilot door departed the aircraft, snapping the hinges. I was happy the hinges...
Forum: Electrical Systems 03-04-2020, 07:05 AM
Replies: 5
Views: 631
Posted By Carl Froehlich
Alternative to the PC-680 battery

There have been a lot of postings concerning less than stellar performance when using the standard PC-680 battery.

For those in the building process, I recommend you look at the option to instead...
Forum: Electronic Ignition Systems 03-03-2020, 10:11 AM
Replies: 35
Views: 6,399
Posted By Carl Froehlich
Sorry, no. Healthy batteries in parallel do not...

Sorry, no. Healthy batteries in parallel do not act that way. There is no issue with having different size batteries (assuming same chemistry) in parallel on an alternator. Each battery only cares...
Forum: Electronic Ignition Systems 03-03-2020, 08:07 AM
Replies: 35
Views: 6,399
Posted By Carl Froehlich
Colin, What battery are you planning to charge...

Colin,

What battery are you planning to charge with this?

I’m confused, why not just charge the batteries using the alternator? For that matter why a “resistor trickle charge”?

Carl
Forum: RV-14 03-01-2020, 07:48 PM
Replies: 9
Views: 698
Posted By Carl Froehlich
A little mico in the holes, then before it sets a...

A little mico in the holes, then before it sets a single bid of fiberglass (small) on the inside as a backer for the micro. Let set and sand flush.

Carl
Forum: RV-10 02-29-2020, 05:07 PM
Replies: 37
Views: 3,590
Posted By Carl Froehlich
I’m guessing you fitted the fuel system per the...

I’m guessing you fitted the fuel system per the Van’s plans - specifically the fuel selector valve, the filter, the fuel pump, the red cube flow sensor then through the firewall to the engine driven...
Forum: Electronic Ignition Systems 02-29-2020, 09:58 AM
Replies: 7
Views: 970
Posted By Carl Froehlich
Correct - thus the reason to set timing at 5...

Correct - thus the reason to set timing at 5 degrees ATDC for the IO-390. This yields the standard 20 degrees BTDC timing for this engine.

Carl
Forum: Electronic Ignition Systems 02-28-2020, 07:37 PM
Replies: 7
Views: 970
Posted By Carl Froehlich
Correct. Install the pMag and orientated it in a...

Correct. Install the pMag and orientated it in a convenient position.

Reminder - for the IO-390 you set the pMag timing with the crank at 5 degrees ATDC, not TDC. Recommend having the jumper...
Forum: RV General Discussion/News 02-26-2020, 09:29 AM
Replies: 19
Views: 1,878
Posted By Carl Froehlich
Decide the end state, then purchase components as...

Decide the end state, then purchase components as money/time allow. Point being buy stuff that builds a system, not just a collection of individual stuff.

For me, even VFR I don’t fly without a...
Forum: RV General Discussion/News 02-24-2020, 08:10 AM
Replies: 24
Views: 1,296
Posted By Carl Froehlich
Do a search, there should be some lengthy...

Do a search, there should be some lengthy discussions on this topic.

I would never leave sump heaters on, with or without a remote temperature controller. The heaters do exactly what they say, heat...
Forum: Glass Cockpit 02-23-2020, 07:01 PM
Replies: 7
Views: 717
Posted By Carl Froehlich
New problem or has this never worked? Carl

New problem or has this never worked?

Carl
Forum: Traditional Aircraft Engines 02-23-2020, 06:26 PM
Replies: 11
Views: 1,471
Posted By Carl Froehlich
This is what I did to project W&B on my build: -...

This is what I did to project W&B on my build:
- A good friend has an RV-8 with a nice W&B. He is using the same Grove gear and parallel valve IO-360 (same as I will use) but with a three bladed MT...
Forum: RV-14 02-23-2020, 05:45 PM
Replies: 14
Views: 1,749
Posted By Carl Froehlich
I agree that some finish other than bare aluminum...

I agree that some finish other than bare aluminum is required. Bare aluminum looks pretty sad after a couple of years. Using powder coat however seems to be problematic.

I use PPG single stage...
Forum: Traditional Aircraft Engines 02-23-2020, 03:40 PM
Replies: 4
Views: 715
Posted By Carl Froehlich
Too many variables, so perhaps time to...

Too many variables, so perhaps time to rebase.

You know #1 cylinder is getting too much gas so start there. Replace the #1 injector nozzle with 0.027" and keep all the rest at the stock 0.028". ...
Forum: Southeast 02-21-2020, 06:16 PM
Replies: 0
Views: 312
Posted By Carl Froehlich
RVs at KGVL?

I’d appreciate talking to any RV guy using Gainesville as their home field.

PM me for contact information.

Thanks,
Carl
Forum: RV General Discussion/News 02-21-2020, 07:24 AM
Replies: 6
Views: 789
Posted By Carl Froehlich
Did you have these LED NAV lights installed...

Did you have these LED NAV lights installed before paint? If so, was the noise problem there before paint?

Are you using airframe ground for these NAV lights?

Carl
Forum: RV General Discussion/News 02-20-2020, 05:04 PM
Replies: 6
Views: 789
Posted By Carl Froehlich
I’m guessing you have LED nav lights and are...

I’m guessing you have LED nav lights and are using the airframe for ground. Correct?

Carl
Forum: Electrical Systems 02-20-2020, 08:35 AM
Replies: 9
Views: 731
Posted By Carl Froehlich
As a side note - I never use bus bars. All that...

As a side note - I never use bus bars. All that bare copper waiting for a nut or screw to fall and short it out always bothered me.

Carl
Forum: RV General Discussion/News 02-17-2020, 03:30 PM
Replies: 20
Views: 1,798
Posted By Carl Froehlich
Yep - similar problem on my first RV (most...

Yep - similar problem on my first RV (most prominent indication was an altitude error).

Simple test, take a 1/8” round head rivet, drill a 1/16” hole through the center, then cut the head off with a...
Forum: RV-14 02-16-2020, 10:26 AM
Replies: 10
Views: 1,122
Posted By Carl Froehlich
If you don’t have the right antenna test...

If you don’t have the right antenna test equipment, it is hard to beat installing an Bob Archer antenna exactly as the instructions lay out.

Note however how this antenna does not use the full width...
Forum: RV General Discussion/News 02-14-2020, 06:36 AM
Replies: 44
Views: 27,468
Posted By Carl Froehlich
Here is a set up I did for the RV-10 and RV-8. ...

Here is a set up I did for the RV-10 and RV-8. It mitigates mud dabblers and ice blocking the fuel vents.

http://www.vansairforce.com/community/showthread.php?t=165701

Carl
Forum: RV General Discussion/News 02-13-2020, 10:29 AM
Replies: 2
Views: 420
Posted By Carl Froehlich
Stew, If you have not yet purchased the...

Stew,

If you have not yet purchased the Precision system, consider AirFlow Performance. It is a bolt on replacement for a carb when doing vertical injection.

I did this on my O-360-A1A back when...
Forum: RV General Discussion/News 02-13-2020, 09:09 AM
Replies: 55
Views: 5,894
Posted By Carl Froehlich
Sam, Just curious as to why you are doing fixed...

Sam,

Just curious as to why you are doing fixed timing. For me the main gain from electronic ignitions is timing advance in cruise to gain engine efficiency.

Carl
Forum: Electrical Systems 02-12-2020, 08:58 PM
Replies: 17
Views: 1,611
Posted By Carl Froehlich
Get the nice SS passthrough flange that comes in...

Get the nice SS passthrough flange that comes in the RV-14 kit. Put a piece of fire sleeve inside the flange and a piece over the top of the flange on the firewall side. Wire runs in the middle of...
Forum: RV General Discussion/News 02-11-2020, 01:47 PM
Replies: 18
Views: 2,937
Posted By Carl Froehlich
No - never said that. It can fly at 90 knots all...

No - never said that. It can fly at 90 knots all day long. I just don’t like doing that. Perhaps I phrased what I said wrong.

I launched out of Phoenix at 110 degrees then a climb up to 14,000’,...
Forum: RV General Discussion/News 02-11-2020, 08:15 AM
Replies: 18
Views: 2,937
Posted By Carl Froehlich
Correct. My understanding is that Will James got...

Correct. My understanding is that Will James got so much noise on the RV-10 cowl that he just stopped making it. A lot of this noise was from a handful of builders with “strong opinions” on...
Forum: RV-8/8A 02-09-2020, 03:54 PM
Replies: 4
Views: 912
Posted By Carl Froehlich
Thomas, PM me your email address and I'll send a...

Thomas,

PM me your email address and I'll send a scan of the template.

Carl
Forum: RV-8/8A 02-09-2020, 11:59 AM
Replies: 4
Views: 912
Posted By Carl Froehlich
Flap motor arm cover

A good friend and RV-8A driver, Tom Doran, came up with this slick cover. It needs a #8 nutplate on the arm rest and a #6 nutplate on the rear seat bulkhead. It shares a #8 screw on the top aft of...
Forum: RV-8/8A 02-08-2020, 02:04 PM
Replies: 8
Views: 1,038
Posted By Carl Froehlich
The simple way it to add a 1” wide strip of the...

The simple way it to add a 1” wide strip of the felt side of Velcro on the inside of the canopy skirt at the bottom.

Carl
Forum: RV-10 02-08-2020, 01:44 PM
Replies: 17
Views: 1,773
Posted By Carl Froehlich
One other thought as reading the OP reminds me of...

One other thought as reading the OP reminds me of a similar incident. Back in the day working to get a ticket flying a rented spam can, this same scenario happened. The engine ran strong on take...
Forum: RV-8/8A 02-08-2020, 10:55 AM
Replies: 6
Views: 689
Posted By Carl Froehlich
If memory serves, the prints tell you to trim the...

If memory serves, the prints tell you to trim the fairing.

Note - on my first 8A I spent a lot of time trimming the weights for balance. Then spent a lot more time adding weight back after paint -...
Forum: Glass Cockpit 02-08-2020, 09:00 AM
Replies: 10
Views: 913
Posted By Carl Froehlich
Kay, Just replace the battery. If a PC-680 is...

Kay,

Just replace the battery. If a PC-680 is not holding a charge as you say, it died a long time ago.

“Rejuvenating” a bad battery should be left for lawn tractors, not an airplane.

Another...
Forum: RV-10 02-08-2020, 08:49 AM
Replies: 17
Views: 1,773
Posted By Carl Froehlich
I wonder if you have the “bad vintage” of...

I wonder if you have the “bad vintage” of Champion spark plugs? I had six of twelve plugs fail in the first 300 hours - all high internal resistance.

Pull the plugs and verify center electrode is...
Forum: Glass Cockpit 02-06-2020, 08:22 AM
Replies: 10
Views: 913
Posted By Carl Froehlich
Kay, I suggest an email, with screen shots, to...

Kay,

I suggest an email, with screen shots, to Dynon Technical Support. They will save you days of chasing your tail by asking the questions you have not yet thought about.

Their tech support team...
Forum: RV-10 02-04-2020, 07:48 PM
Replies: 10
Views: 991
Posted By Carl Froehlich
Had this happen - cause was a rolled brake...

Had this happen - cause was a rolled brake caliper O ring. Replace it and problem fixed.

Carl
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