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Search: Posts Made By: Carl Froehlich
Forum: Electrical Systems Yesterday, 11:52 AM
Replies: 7
Views: 230
Posted By Carl Froehlich
+1 Assuming you are using the B&C backup...

+1
Assuming you are using the B&C backup alternator, or the nice Monkworkz generator on your vacuum pad there is no reason to have a manual switch.

If the primary alternator fails:
- With the B&C...
Forum: RV-10 08-12-2022, 03:57 PM
Replies: 39
Views: 4,513
Posted By Carl Froehlich
Perhaps the engineers at Van’s have reason to...

Perhaps the engineers at Van’s have reason to worry about such things:
https://i.postimg.cc/DfCrSZz6/F140697-E-0353-4-A67-A636-3-D3384931-F8-B.jpg
Take the safe road. Build a ferry tank to replace...
Forum: RV-14 08-12-2022, 12:03 PM
Replies: 14
Views: 736
Posted By Carl Froehlich
+1. If you need to turn it off at any point you...

+1.

If you need to turn it off at any point you can always pull the breaker to that alternator’s voltage regulator.

Carl
Forum: RV-9/9A 08-12-2022, 11:54 AM
Replies: 4
Views: 198
Posted By Carl Froehlich
When you fit the wingtips you will find during...

When you fit the wingtips you will find during the process that there is a lot of movement of the trailing wingtip trailing edge.

You want to get the pleasing result of flaps, aileron and wingtip...
Forum: RV-9/9A 08-12-2022, 11:30 AM
Replies: 4
Views: 198
Posted By Carl Froehlich
Assuming you are a paint before you fly guy, I...

Assuming you are a paint before you fly guy, I recommend:
- Completely assemble the plane - use hardware store bolts for the wings and such. Do not fit wingtips until the last step.
- Allot a week...
Forum: Electronic Ignition Systems 08-12-2022, 09:00 AM
Replies: 21
Views: 1,207
Posted By Carl Froehlich
Some thoughts: - CHTs. Yep - get more power out...

Some thoughts:
- CHTs. Yep - get more power out of a cylinder and CHTs go up. Take the timing too far advanced and the CHTs goes up. PMags are close to base timing (whatever you set them at) on...
Forum: Electronic Ignition Systems 08-11-2022, 11:37 AM
Replies: 21
Views: 1,207
Posted By Carl Froehlich
I have dual pMags running for close to 20 years...

I have dual pMags running for close to 20 years on my first RV (8A) and now have 300+ hours on a dual pMag install on my RV-8. There is also a six cylinder pMag running on my old RV-10 and I ordered...
Forum: RV-10 08-10-2022, 05:08 PM
Replies: 12
Views: 575
Posted By Carl Froehlich
David I suggest you carefully evaluate why you...

David I suggest you carefully evaluate why you want a console or quadrant in your RV-10. In my experience, these complicate the build, follow on maintenance and takes up unnecessary space. The...
Forum: Glass Cockpit 08-10-2022, 02:20 PM
Replies: 19
Views: 836
Posted By Carl Froehlich
This is exactly opposite of my experience with...

This is exactly opposite of my experience with the SkyView AOA I’ve installed on RVs. Dirt simple to calibrate and consistory repeatable results during operation. On landing I get the steady tone...
Forum: Traditional Aircraft Engines 08-10-2022, 12:13 PM
Replies: 38
Views: 1,689
Posted By Carl Froehlich
Perhaps you are so rich that the way you are...

Perhaps you are so rich that the way you are leaning does not allow adequate time for the excess fuel to go away.

I recommend you do this at the same RPM - perhaps 800 or so. If the engine is so...
Forum: Traditional Aircraft Engines 08-10-2022, 10:46 AM
Replies: 38
Views: 1,689
Posted By Carl Froehlich
On the last engine I got from Thunderbolt, the...

On the last engine I got from Thunderbolt, the idle mixuture was set way rich - as the engine sounded like a poorly tuned Harley at idle. It took a lot of adjustment to get it in the ball park. ...
Forum: Glass Cockpit 08-09-2022, 10:53 AM
Replies: 15
Views: 922
Posted By Carl Froehlich
Yep - the GTN-650 screen is just one step above...

Yep - the GTN-650 screen is just one step above useless. But, the function of the GTN-650 (or GNC 355 or GTN 750) is not screen dependent - that is what an integrate EFIS system is for (like the...
Forum: Glass Cockpit 08-09-2022, 08:14 AM
Replies: 15
Views: 922
Posted By Carl Froehlich
For IFR I too lean toward both a TSO certified...

For IFR I too lean toward both a TSO certified GPS navigator and VOR/LOC/ILS receiver and COMM, and a stand alone COMM #2.

On the last two planes I did this with the “I wish there was a better...
Forum: Glass Cockpit 08-08-2022, 02:16 PM
Replies: 19
Views: 951
Posted By Carl Froehlich
I’ve built five dual EFIS glass IFR panels. You...

I’ve built five dual EFIS glass IFR panels. You can do a lot better than $60K.

PM sent.
Forum: RV General Discussion/News 08-08-2022, 01:36 PM
Replies: 7
Views: 400
Posted By Carl Froehlich
This mounting works well. As previous posted, do...

This mounting works well.

As previous posted, do not run the nav/strobe wire along the antenna as shown in the Archer instructions. No need to temp the RFI noise gremlins if you don’t have to.

The...
Forum: RV-8/8A 08-08-2022, 12:02 PM
Replies: 9
Views: 853
Posted By Carl Froehlich
As with all our choices during a build, there are...

As with all our choices during a build, there are trade offs (no free lunch).

I suggest you prioritize your mission goals. For example:
- If time to climb is the top objective then a fire breathing...
Forum: Traditional Aircraft Engines 08-08-2022, 08:37 AM
Replies: 10
Views: 309
Posted By Carl Froehlich
This is not what balanced injector nozzles...

This is not what balanced injector nozzles mean.

Do a data run. Record total fuel flow when each cylinder reaches peak EGT. The first to peak fuel flow minus the last to peak fuel flow is your...
Forum: Glass Cockpit 08-08-2022, 07:29 AM
Replies: 15
Views: 922
Posted By Carl Froehlich
Ed, You are doing what all builders should do; -...

Ed,

You are doing what all builders should do;
- Identify each risk
- Evaluate the outcome if that risk takes place
- If the outcome can be managed, move on
- If the outcome cannot be managed, add...
Forum: RV General Discussion/News 08-07-2022, 04:40 PM
Replies: 4
Views: 393
Posted By Carl Froehlich
For the RV-8 you will need to drill out the...

For the RV-8 you will need to drill out the rivets and remove the wing/fuselage fairing (that has the flap stop in it). You drill out a hole for the step and reinstall the fairing. The fairing...
Forum: Places To Fly...Things to See...Things to Eat 08-07-2022, 06:56 AM
Replies: 18
Views: 1,067
Posted By Carl Froehlich
I suggest you can combine the following on your...

I suggest you can combine the following on your trip to KFFA:
- W95, Okracoke Island. I recommend The Castle B&B. Park you plane at W95 and they will come pick you up.
- KTGI, Tangier Island...
Forum: Safety 08-05-2022, 09:00 AM
Replies: 91
Views: 10,572
Posted By Carl Froehlich
Reminder - do not use a bungee cord for this. ...

Reminder - do not use a bungee cord for this. Use a nice piece of 3/16” or so nylon line.

Practice your Bowline knot ability - use that for the knot on the elevator journal bearing. It is easy to...
Forum: RV-10 08-03-2022, 08:03 PM
Replies: 4
Views: 658
Posted By Carl Froehlich
+1. This cam latch is a must - don’t fly without...

+1. This cam latch is a must - don’t fly without it.

Carl
Forum: RV-10 08-02-2022, 08:18 AM
Replies: 6
Views: 1,189
Posted By Carl Froehlich
I ordered my IO-540 from Thunderbolt with...

I ordered my IO-540 from Thunderbolt with standard compression pistons and Cold Air Sump. I was told I’d get ~10 more ponies out of it.

The downside is cost and a more complicated install. The...
Forum: RV Ongoing Maintenance Issues 08-01-2022, 04:23 PM
Replies: 26
Views: 2,042
Posted By Carl Froehlich
Any photos? Carl

Any photos?

Carl
Forum: Glass Cockpit 08-01-2022, 02:34 PM
Replies: 19
Views: 836
Posted By Carl Froehlich
Verify you connected the AOA tubing to both...

Verify you connected the AOA tubing to both ADHARS modules.

Carl
Forum: RV Building Tips/Techniques 08-01-2022, 10:44 AM
Replies: 2
Views: 332
Posted By Carl Froehlich
I let the tanks sit on a bench with ~5 gallons of...

I let the tanks sit on a bench with ~5 gallons of 100LL for a few months, rotating them so gas sits on all internal faces for a few weeks. This is to find those weeping rivets that only show up with...
Forum: Glass Cockpit 07-30-2022, 09:13 AM
Replies: 10
Views: 963
Posted By Carl Froehlich
You are asking the legendary “Chevy or Ford”...

You are asking the legendary “Chevy or Ford” question.

The autopilot servos you know have are a match to the SkyView system. You can have the G5 get a GPS feed from whatever you want.

The GNX 375...
Forum: RV Building Tips/Techniques 07-29-2022, 05:56 AM
Replies: 12
Views: 905
Posted By Carl Froehlich
+1 Just call it a speed mod that gives you an...

+1

Just call it a speed mod that gives you an extra five knots….

Carl
Forum: RV Ongoing Maintenance Issues 07-28-2022, 07:16 AM
Replies: 65
Views: 11,081
Posted By Carl Froehlich
This is really the only way to gain the leverage...

This is really the only way to gain the leverage needed to hold the rudder. While this is very simple to make, I’m sure many would rather buy it. However, I strongly recommend not using bungee...
Forum: RV-15 07-27-2022, 11:26 AM
Replies: 457
Views: 91,847
Posted By Carl Froehlich
Fully agree - but round head rivets, either...

Fully agree - but round head rivets, either driven or pulled, are just plain ugly!

Carl
Forum: Traditional Aircraft Engines 07-27-2022, 07:29 AM
Replies: 18
Views: 1,521
Posted By Carl Froehlich
Bore scope the cylinder and inspect the exhaust...

Bore scope the cylinder and inspect the exhaust valve before doing anything else.

Carl
Forum: Traditional Aircraft Engines 07-25-2022, 11:50 AM
Replies: 18
Views: 870
Posted By Carl Froehlich
This is the right way! Carl (And yep - I did it...

This is the right way!

Carl
(And yep - I did it wrong as I cut the ramp to far back - so I had to invent a new filter holder end)
Forum: Painting your RV 07-25-2022, 07:58 AM
Replies: 17
Views: 1,495
Posted By Carl Froehlich
For builders that do their own exterior paint, I...

For builders that do their own exterior paint, I suggest:
- Finish the fiberglass parts, all the way to the point they are ready for final paint. Use the same primer that you will use for final...
Forum: Painting your RV 07-24-2022, 12:01 PM
Replies: 17
Views: 1,495
Posted By Carl Froehlich
I’ve done it both ways; fly then paint and paint...

I’ve done it both ways; fly then paint and paint then fly. Pros and Cons for each:
- Paint then fly provides for easier prep. You still have to fully assemble the plane to get the rigging and...
Forum: Traditional Aircraft Engines 07-24-2022, 08:19 AM
Replies: 18
Views: 870
Posted By Carl Froehlich
Correct - adjust the ramp bend to meet the lower...

Correct - adjust the ramp bend to meet the lower cowl inlet BUT DO NOT trim the ramp until after you fit the snorkel (or you will find you no longer have enough ramp to fit the filter). You end up...
Forum: Midwest 07-24-2022, 07:56 AM
Replies: 111
Views: 31,048
Posted By Carl Froehlich
The rope is looped around the middle elevator...

The rope is looped around the middle elevator journal bearings - using a Bowline knot so you can easily untie it. Once done the elevators are held in the full up position using the pilot seat belt...
Forum: Midwest 07-24-2022, 06:52 AM
Replies: 111
Views: 31,048
Posted By Carl Froehlich
The “pin the horn” or the “padded clamps” on the...

The “pin the horn” or the “padded clamps” on the counterweight type stops always fail.

Here is the simple and very strong way to...
Forum: Glass Cockpit 07-23-2022, 11:34 AM
Replies: 8
Views: 822
Posted By Carl Froehlich
While the SL-30 is still the best NAV/Comm,...

While the SL-30 is still the best NAV/Comm, Garmin letting support for it die away removes it as an option for me.

For the new project I plan on a Garmin GNC-355 and this new Trig Nav/Comm (I...
Forum: Engine Monitors 07-23-2022, 10:36 AM
Replies: 1
Views: 272
Posted By Carl Froehlich
Redo the probe spade connectors. If that does...

Redo the probe spade connectors. If that does not fix the problem, replace the probe.

Carl
Forum: Tools 07-23-2022, 10:32 AM
Replies: 6
Views: 667
Posted By Carl Froehlich
A three piece set of Irwin is the way to go. For...

A three piece set of Irwin is the way to go. For run of the mill holes, the Harbor Freight type stuff is fine - just finish the last bit with the Irwin unibit. The unibits with multiple flutes tend...
Forum: The RV Grin 07-23-2022, 09:38 AM
Replies: 1
Views: 659
Posted By Carl Froehlich
Her first RV-8 ride

Many cross country hours in an RV-10, but her first RV-8 ride. Karrie is the wife of the now owner of my old RV-10 - and they have started building an...
Forum: RV-8/8A 07-20-2022, 02:09 PM
Replies: 4
Views: 619
Posted By Carl Froehlich
I had my buddy make one for me (he had the...

I had my buddy make one for me (he had the original on my old 8A that he now owns). I don’t think anyone sells them anymore.

I’ll ask him if he is interested in making you one if you like.

Carl
Forum: RV Ongoing Maintenance Issues 07-20-2022, 01:01 PM
Replies: 4
Views: 488
Posted By Carl Froehlich
Thanks for posting Rico. I’m running Cleveland...

Thanks for posting Rico. I’m running Cleveland brakes and wheels on my RV-8, but have a new set of Grove brake calipers I’d like to use. So when you find the right Grove disk that fits the...
Forum: RV-12/RV-12iS 07-20-2022, 09:21 AM
Replies: 2
Views: 442
Posted By Carl Froehlich
The SkyView Autopilot module provides nice...

The SkyView Autopilot module provides nice functionality, including pitch and roll trim servo switching and auto trim.

You will need to verify:
- You are using the Autopilot Module for trim servo...
Forum: Electronic Ignition Systems 07-19-2022, 07:30 PM
Replies: 17
Views: 1,933
Posted By Carl Froehlich
This. Carl

This.
Carl
Forum: GPS 07-19-2022, 09:56 AM
Replies: 10
Views: 756
Posted By Carl Froehlich
Mike, You need to tell us what you have. Is...

Mike,

You need to tell us what you have. Is this a:
- GPS antenna - the kind with a BNC connector on the bottom and nothing else?
- Or a GPS antenna/receiver - the kind that gets power, ground and...
Forum: RV-10 07-18-2022, 05:53 PM
Replies: 20
Views: 1,908
Posted By Carl Froehlich
Jeff, Interested in your use of the FM-300R...

Jeff,

Interested in your use of the FM-300R instead of the FM-200. Don at AFP recommended the FM-200 for my cold air sump IO-540 order.

Also I’m working a filter box for the RV-10 James Cowl so...
Forum: RV-10 07-18-2022, 02:50 PM
Replies: 8
Views: 1,003
Posted By Carl Froehlich
I suggest putting him in the co-pilot seat and...

I suggest putting him in the co-pilot seat and not taking anyone or anything in the back.

Get your sharp pencil out and do the math. You should work your way up to full gross, but in small steps. ...
Forum: Electrical Systems 07-16-2022, 06:32 PM
Replies: 69
Views: 8,446
Posted By Carl Froehlich
I can report the Monkworkz generator on my RV-8...

I can report the Monkworkz generator on my RV-8 works perfectly.

Carl
Forum: Electrical Systems 07-16-2022, 05:56 PM
Replies: 7
Views: 588
Posted By Carl Froehlich
It will peel right off. Just ease a blade under...

It will peel right off. Just ease a blade under it.

Carl
Forum: RV-10 07-16-2022, 07:27 AM
Replies: 20
Views: 1,908
Posted By Carl Froehlich
Richard, Very nice work. Did you use the...

Richard,

Very nice work.

Did you use the standard Van’s baffles for the side aluminum pieces? For the plenum I made for my first RV-10 I had to fabricate those parts out of aluminum sheet - I’d...
Forum: Traditional Aircraft Engines 07-15-2022, 03:40 PM
Replies: 74
Views: 4,630
Posted By Carl Froehlich
One thing that I found on my data runs is for a...

One thing that I found on my data runs is for a constant fuel flow, lower RPM is not necessarily better efficiency. I can only assume the ability of a prop to transform engine power to thrust is not...
Forum: RV-10 07-15-2022, 10:08 AM
Replies: 27
Views: 2,130
Posted By Carl Froehlich
I have to disagree. If the objective is cruise...

I have to disagree. If the objective is cruise engine efficiency, the 99% solution, the one that has the least impact (as in cost, complexity and not having an engine dependent on ship's power) is...
Forum: COMM 07-15-2022, 09:44 AM
Replies: 12
Views: 723
Posted By Carl Froehlich
After looking at the new comments, I too suspect...

After looking at the new comments, I too suspect the radios are just fine. A radio problem will present itself on the ground as well as the air.

So - look elsewhere for the culprit. Taking a...
Forum: COMM 07-14-2022, 02:42 PM
Replies: 12
Views: 723
Posted By Carl Froehlich
$450 to exchange a six year old radio for a brand...

$450 to exchange a six year old radio for a brand new one - cheap.

Just think what Garmin would have charged….

Carl
Forum: RV-15 07-11-2022, 07:37 PM
Replies: 457
Views: 91,847
Posted By Carl Froehlich
My guess - the answer is yes. Carl

My guess - the answer is yes.

Carl
Forum: RV-15 07-11-2022, 07:15 PM
Replies: 457
Views: 91,847
Posted By Carl Froehlich
I’d bet money that is the revised RV-14 cowl with...

I’d bet money that is the revised RV-14 cowl with the IO-390-EXP119 engine.

Carl
Forum: RV-7/7A 07-10-2022, 02:41 PM
Replies: 19
Views: 1,356
Posted By Carl Froehlich
Here is a recent thread where I discuss the issue...

Here is a recent thread where I discuss the issue I had with a red cube mounted per plans in an RV-14. You may have a similar issue.
https://vansairforce.net/community/showthread.php?t=207797

Carl
Forum: RV-14 07-08-2022, 10:02 AM
Replies: 8
Views: 1,114
Posted By Carl Froehlich
While a rivet cutter and a bunch of long rivets...

While a rivet cutter and a bunch of long rivets sounds good, you will find this to be a real pain.

Rivets are dirt cheap. You will find you have far too many 3-3.5 rivets and not enough 3-4, 3-4.5,...
Forum: RV General Discussion/News 07-08-2022, 09:09 AM
Replies: 31
Views: 2,725
Posted By Carl Froehlich
I never liked the look of SkyBolt type fasteners...

I never liked the look of SkyBolt type fasteners so have stayed with hinges - but modified.

I use 1/8” SS pins on the top cowl to fuselage hinge instead of the smaller diameter pins in the plans. ...
Forum: RV-4 07-06-2022, 04:48 PM
Replies: 10
Views: 1,083
Posted By Carl Froehlich
If you are ok with fiberglass work, you can do...

If you are ok with fiberglass work, you can do something like this. This uses a 3” SCAT hose between the airbox and the cowl engine air inlet. I suggest you figure out what size SCAT hose works best...
Forum: RV General Discussion/News 07-06-2022, 01:30 PM
Replies: 26
Views: 1,716
Posted By Carl Froehlich
Yep - when inverted I suspect having an error in...

Yep - when inverted I suspect having an error in fuel flow reading will be low on your priority list.

Yep - the RV-10 plans do put the transducer in the tunnel, and yep it gives erroneous reading...
Forum: RV Ongoing Maintenance Issues 07-06-2022, 01:05 PM
Replies: 7
Views: 1,231
Posted By Carl Froehlich
I’m on starter #3 on my 300 hour IO-360-M1B. The...

I’m on starter #3 on my 300 hour IO-360-M1B. The good news is Thunderbolt stands behind their engines.

The photos show #1 and #2 starters leaking. These starters also had the now classic solenoid...
Forum: RV General Discussion/News 07-06-2022, 11:08 AM
Replies: 26
Views: 1,716
Posted By Carl Froehlich
From the FT-60 (Red Cube) install...

From the FT-60 (Red Cube) install manual:

Mechanical Interface:
If the aircraft has a fuel pump(s), the flow transducer MUST be installed downstream of the last fuel pump.
Installing the transducer...
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