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Search: Posts Made By: Carl Froehlich
Forum: RV General Discussion/News Yesterday, 02:14 PM
Replies: 15
Views: 823
Posted By Carl Froehlich
Two points: - Yes, you still need the GPS-2020 or...

Two points:
- Yes, you still need the GPS-2020 or GPS-250 if only for backup.
- Yes, perfectly ok to use the GPS-250 instead of the GPS-2020 if you are using the Garmin box for the serial GPS output...
Forum: Electronic Ignition Systems Yesterday, 11:26 AM
Replies: 27
Views: 1,075
Posted By Carl Froehlich
Ancient history, fixed many years ago. Carl

Ancient history, fixed many years ago.

Carl
Forum: RV-7/7A Yesterday, 11:21 AM
Replies: 18
Views: 969
Posted By Carl Froehlich
I just finished an RV-8 with a stock Van’s cowl...

I just finished an RV-8 with a stock Van’s cowl and baffles - AND I REGRET that decision.

I built the RV-10 with a James Cowl and plenum and was very pleased with the quality and fit, and the...
Forum: Electrical Systems Yesterday, 09:48 AM
Replies: 28
Views: 1,308
Posted By Carl Froehlich
One note of caution, if you have more than one...

One note of caution, if you have more than one firewall ground wire to the engine (or anything attached to the engine) it needs to be as big as the ground wire for the starter.

Consider a single...
Forum: Electronic Ignition Systems 05-26-2020, 08:35 PM
Replies: 27
Views: 1,075
Posted By Carl Froehlich
Tell us more: - Clean/replace plugs? - Reset...

Tell us more:
- Clean/replace plugs?
- Reset timing on the pMag and/or Mag?
- Check plug wire resistance and connections on both ends?

Carl
Forum: Traditional Aircraft Engines 05-26-2020, 07:42 PM
Replies: 30
Views: 1,783
Posted By Carl Froehlich
As a side note, an experienced A&P taught me...

As a side note, an experienced A&P taught me early on with my first RV to use 0.032” wire for the oil filter, not 0.040”. The smaller wire is less likely to wear out the engine retaining tab.

Carl
Forum: RV-10 05-26-2020, 01:31 PM
Replies: 53
Views: 2,385
Posted By Carl Froehlich
Yep - build it like you want it. One comment -...

Yep - build it like you want it.

One comment - for the last three RVs I insert the side cowl pins from the cockpit using a piece of 1/4” aluminum tubing as a conduit from the aft side of the...
Forum: Electrical Systems 05-26-2020, 12:06 PM
Replies: 7
Views: 418
Posted By Carl Froehlich
To the original question, the $34.50 70amp...

To the original question, the $34.50 70amp breaker is just fine - I used this breaker on three RVs.

You want a 70amp breaker to avoid nuisance trips as will happen with a 60amp breaker on a 60amp...
Forum: RV-10 05-26-2020, 11:37 AM
Replies: 53
Views: 2,385
Posted By Carl Froehlich
I too prefer hinges, but strongly recommend using...

I too prefer hinges, but strongly recommend using the extruded hinges instead of the rolled hinges for the bottom. I had one side of a bottom hinge (rolled type) with broken eyelets on one RV. I...
Forum: RV-10 05-26-2020, 09:02 AM
Replies: 53
Views: 2,385
Posted By Carl Froehlich
As an alternative, consider using the James Wheel...

As an alternative, consider using the James Wheel pants. I consider the stock RV-10 main gear pants to be way too wide (thus the need or the axle extension). These pants will require some...
Forum: COMM 05-25-2020, 02:58 PM
Replies: 8
Views: 358
Posted By Carl Froehlich
For your comm antenna, four wires, of whatever...

For your comm antenna, four wires, of whatever gauge you have in your junk box, at the base of the antenna. Each wire ~1/4 wavelength (so 23” - 24” long).

There is no advantage to use more.

The...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 05-23-2020, 12:31 PM
Replies: 3
Views: 221
Posted By Carl Froehlich
Butch, As mentioned, recommend you stay south of...

Butch,

As mentioned, recommend you stay south of the SFRA. KRMN or KEZF are good choices.

Drop by Dogwood if you have time to kill - I’ll buy you a beer.

Carl
Dogwood Airpark (VA42)
Forum: Electrical Systems 05-23-2020, 11:50 AM
Replies: 28
Views: 1,308
Posted By Carl Froehlich
This will start a flame war, but for me the...

This will start a flame war, but for me the answer is no. Why go through all the pain of case grounds, big braided straps and such and wonder if that is causing startling problems or not? I...
Forum: RV-10 05-23-2020, 08:16 AM
Replies: 4
Views: 290
Posted By Carl Froehlich
Thanks Krea. On the first RV-10 I used the James...

Thanks Krea.

On the first RV-10 I used the James cowl. I consider this cowl the best modification I did on that plane. Talking with the new owners of James Aircraft they are working to offer an...
Forum: RV-10 05-22-2020, 05:55 PM
Replies: 4
Views: 290
Posted By Carl Froehlich
Spinner for the Show Plane cowl

For those builders using the Show Plane cowl, where are you getting your 15” spinners and how much do they cost?

Carl
Forum: Electrical Systems 05-22-2020, 05:51 PM
Replies: 28
Views: 1,308
Posted By Carl Froehlich
I always just use a length of cable from the...

I always just use a length of cable from the firewall ground lug to the nice ground lug on the starter. I use the same size cable for this ground that provides power to the starter. Remember all...
Forum: RV General Discussion/News 05-21-2020, 03:10 PM
Replies: 11
Views: 605
Posted By Carl Froehlich
Check to see if there is a rag in the cooler...

Check to see if there is a rag in the cooler mount.

Carl
Forum: RV Building Tips/Techniques 05-21-2020, 10:00 AM
Replies: 9
Views: 487
Posted By Carl Froehlich
A good spirit level of at least 2’ is...

A good spirit level of at least 2’ is recommended, 4’ preferred, and are not at all expensive. I use a 2’ and a 6’ level.

A digital level is nice, but for this fall short of the need and I find do...
Forum: Electrical Systems 05-21-2020, 09:32 AM
Replies: 29
Views: 1,433
Posted By Carl Froehlich
Very good design point - not only for shedding...

Very good design point - not only for shedding loads to conserve battery capacity, but for rapid isolation of big loads in the event of an electrical fault.

This can also be achieved by having...
Forum: RV General Discussion/News 05-18-2020, 03:08 PM
Replies: 34
Views: 2,475
Posted By Carl Froehlich
If you go with the Surefly your design, in my...

If you go with the Surefly your design, in my opinion, falls short. While other may be ok with a ship power dependent ignition and a mag, I'm not. I would require a dedicated power source for that...
Forum: RV General Discussion/News 05-18-2020, 09:36 AM
Replies: 34
Views: 2,475
Posted By Carl Froehlich
What is the function of the 10amp breaker feeding...

What is the function of the 10amp breaker feeding the avionics bus? This places a breaker in series with the the avionics load breakers risking a single fault on the avionics buss taking down the...
Forum: RV-14 05-17-2020, 07:22 PM
Replies: 6
Views: 285
Posted By Carl Froehlich
Novus #3, then #2. Use #1 for everyday...

Novus #3, then #2. Use #1 for everyday...
Forum: Electronic Ignition Systems 05-17-2020, 06:56 PM
Replies: 41
Views: 7,230
Posted By Carl Froehlich
My neighbor just installed one on his Lancair 4...

My neighbor just installed one on his Lancair 4 (the one that flew over both North and South Poles and recently broke the recorded for circumnavigating they globe heading west). He is happy with the...
Forum: RV Building Tips/Techniques 05-17-2020, 05:38 PM
Replies: 16
Views: 871
Posted By Carl Froehlich
Consider dropping the top cowl down 1/4” or so. ...

Consider dropping the top cowl down 1/4” or so. The engine will only sag, so starting with the top of the cowl in about a straight line with the top of the spinner mitigates that sag.

Carl
Forum: RV General Discussion/News 05-17-2020, 03:55 PM
Replies: 4
Views: 536
Posted By Carl Froehlich
The short answer is yes, delayed timing (to a...

The short answer is yes, delayed timing (to a point) will lower CHTs.

The longer answer is why do you want to do this? Has it been a problem?

Back fitting pMags may result in higher CHTs, but that...
Forum: RV General Discussion/News 05-17-2020, 02:48 PM
Replies: 11
Views: 754
Posted By Carl Froehlich
Yep - fixed the exact same problem on an RV-14A. ...

Yep - fixed the exact same problem on an RV-14A. The fuel flow would be about right, then above 7K’ or so it would go to ~14gph regardless of mixture setting.

As you point out, the RV-14A had the...
Forum: Electrical Systems 05-17-2020, 08:45 AM
Replies: 5
Views: 441
Posted By Carl Froehlich
I would assume this is specifically for "jump...

I would assume this is specifically for "jump start" connections. So just like your car you jump the battery, start the engine and disconnect the external power.

I offer that such clunky external...
Forum: Glass Cockpit 05-16-2020, 11:26 AM
Replies: 19
Views: 905
Posted By Carl Froehlich
I built my first RV with fuses (the new trend at...

I built my first RV with fuses (the new trend at the time) and found them to be a real PITA as they they end up getting mounted were access in not easy. The fuses in that first RV were replaced with...
Forum: RV-14 05-16-2020, 08:25 AM
Replies: 11
Views: 859
Posted By Carl Froehlich
I used a little white grease for all the UHMW...

I used a little white grease for all the UHMW tube blocks on assembly. No need to re-grease unless you take it apart.

Carl
Forum: RV General Discussion/News 05-14-2020, 11:27 AM
Replies: 14
Views: 723
Posted By Carl Froehlich
Sorry Danny, I disagree. This ~$2 home brew...

Sorry Danny, I disagree.

This ~$2 home brew antenna is flying on four RVs and preforms very well. I pick up VORs at 90+nm and localizers way beyond any practical range. For nosegear RVs the under...
Forum: RV General Discussion/News 05-14-2020, 10:45 AM
Replies: 6
Views: 331
Posted By Carl Froehlich
To answer the questions, yes, EGT can indicate an...

To answer the questions, yes, EGT can indicate an abnormal condition:
- Way low, you lost that cylinder
- Way high, you have a fuel flow problem or induction leak

But - these would be indication...
Forum: RV General Discussion/News 05-14-2020, 07:13 AM
Replies: 18
Views: 1,074
Posted By Carl Froehlich
Anytime you suspect a spider issue, do the simple...

Anytime you suspect a spider issue, do the simple shot glass test. Disconnect the line from the spider to each injector and put a shot glass under it. Turn on the fuel pump, open the throttle and...
Forum: COMM 05-13-2020, 12:26 PM
Replies: 27
Views: 1,882
Posted By Carl Froehlich
On the photos it is clear you have NAV/Strobe...

On the photos it is clear you have NAV/Strobe wire running along the antenna arm. Don’t do that.

Carl
Forum: RV General Discussion/News 05-13-2020, 11:16 AM
Replies: 14
Views: 723
Posted By Carl Froehlich
What you have is a marginal antenna, but you...

What you have is a marginal antenna, but you should get some reception.

As you verified continuity, I wonder if you checked to see if the coax was shorted (center shorted to shield). You will need...
Forum: RV General Discussion/News 05-12-2020, 04:21 PM
Replies: 9
Views: 359
Posted By Carl Froehlich
Try cutting off the connectors and replacing them...

Try cutting off the connectors and replacing them with standard Fast-tabs. Add a piece of #20 wire in the connector with the probe wire - makes for a better crimp connection.

Carl
Forum: RV General Discussion/News 05-12-2020, 08:39 AM
Replies: 32
Views: 3,110
Posted By Carl Froehlich
Randy, All RVs are better than non-RVs, so there...

Randy,

All RVs are better than non-RVs, so there is no wrong choice.

If you have the cash, do the 14. It will go together faster and you will be a hero with your wife or significant other. It...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 05-12-2020, 08:24 AM
Replies: 5
Views: 711
Posted By Carl Froehlich
Epps is the least bad of the overpriced options. ...

Epps is the least bad of the overpriced options. Not long ago I did a commute to Atlanta and used Epps.

Buy fuel, much cheaper than not.

Carl
Forum: RV-7/7A 05-11-2020, 12:06 PM
Replies: 15
Views: 805
Posted By Carl Froehlich
Sorry, his is the 2004X cooler - I used the 2006X...

Sorry, his is the 2004X cooler - I used the 2006X cooler on the RV-10 with a 4” SCAT hose. The RV-8 uses a 3” hose. The cooler on the RV-10 worked so well I decided to stick with the Airflow...
Forum: RV-10 05-11-2020, 11:33 AM
Replies: 3
Views: 502
Posted By Carl Froehlich
Greg, I installed a six cylinder pMag on the...

Greg,

I installed a six cylinder pMag on the RV-10 - and I don’t understand why you set the low end of the timing at 22 degrees. Perhaps you are referring to the timing at idle if you set it to the...
Forum: RV-3 05-11-2020, 08:45 AM
Replies: 10
Views: 805
Posted By Carl Froehlich
Before you go squeezing trailing edges, here is...

Before you go squeezing trailing edges, here is my recent post on rigging. I would first suspect an aileron (or both) hanging high or low.

Carl

My suggestion:
- Start with the flaps. Make sure...
Forum: RV General Discussion/News 05-11-2020, 08:14 AM
Replies: 11
Views: 738
Posted By Carl Froehlich
Bill, Drive down to Dogwood (VA42) and take a...

Bill,

Drive down to Dogwood (VA42) and take a look at the RVs here and get hooked into the local RV gang at Shannon.

Carl
Forum: COMM 05-11-2020, 08:06 AM
Replies: 27
Views: 1,882
Posted By Carl Froehlich
I suspect you have an end of a wingtip screw...

I suspect you have an end of a wingtip screw touching the antenna.

Carl
Forum: COMM 05-11-2020, 08:02 AM
Replies: 49
Views: 2,839
Posted By Carl Froehlich
Scott, I offer that you are chasing 10th order...

Scott,

I offer that you are chasing 10th order items. For example:
- Antenna connection. If connected, RF energy will always prefer the path of least resistance. It will not “leak”, just as a...
Forum: RV-7/7A 05-10-2020, 11:25 AM
Replies: 15
Views: 805
Posted By Carl Froehlich
If you can, do firewall mounted. Here is my...

If you can, do firewall mounted. Here is my setup on the RV-8. Standard 3” hose to the Airflow 2006X. The butterfly valve is normally shut some to keep the oil temp up (so far this spring at...
Forum: COMM 05-09-2020, 04:06 PM
Replies: 49
Views: 2,839
Posted By Carl Froehlich
Yep - at this point the GTR200 looks like the...

Yep - at this point the GTR200 looks like the problem. See if you can swap it out to verify or eliminate.

I’ve only flown one plane that had a GTR200 (as comm #2). I was a not impressed - when...
Forum: RV General Discussion/News 05-08-2020, 04:46 PM
Replies: 3
Views: 399
Posted By Carl Froehlich
As a rough guess, I’d say your avionics will draw...

As a rough guess, I’d say your avionics will draw about 8-10amps. For a 3amp-hr battery that translates to perhaps 15 minutes. It is your airplane, but I would consider that insufficient. I...
Forum: RV-9/9A 05-07-2020, 08:05 AM
Replies: 4
Views: 296
Posted By Carl Froehlich
Rigging can be done without this alignment tool,...

Rigging can be done without this alignment tool, and this tool should not be relied on exclusive when rigging.

My suggestion:
- Start with the flaps. Make sure they are really all the way up...
Forum: RV-14 05-05-2020, 09:47 AM
Replies: 10
Views: 907
Posted By Carl Froehlich
Yep, same exact problem on a first flight RV-14A...

Yep, same exact problem on a first flight RV-14A I know of.

Root issue, he left off the canopy seal gasket as he figured to put it on after paint. Gasket on, the high pitched noise went away.

Carl
Forum: RV-7/7A 05-05-2020, 09:16 AM
Replies: 11
Views: 612
Posted By Carl Froehlich
Never happen to me. Perhaps you are using the...

Never happen to me. Perhaps you are using the 1/8" instead of the 3/32" pop rivet die set.

Carl
Forum: RV General Discussion/News 05-05-2020, 09:02 AM
Replies: 22
Views: 1,576
Posted By Carl Froehlich
All is good. You want ~180 degrees as measured...

All is good. You want ~180 degrees as measured on your probe. This does translate to higher oil temps elsewhere in your engine, but that is already taken into consideration for the ~180 degree...
Forum: RV-7/7A 05-05-2020, 08:07 AM
Replies: 11
Views: 612
Posted By Carl Froehlich
For new builders, use a pop rivet dimple die for...

For new builders, use a pop rivet dimple die for these trailing edge rivet holes, not your C frame.

Carl
Forum: RV Ongoing Maintenance Issues 05-03-2020, 03:04 PM
Replies: 79
Views: 34,005
Posted By Carl Froehlich
For you RV-10 guys wanting a bigger filter, one...

For you RV-10 guys wanting a bigger filter, one option is to replace the standard filter with a taller one, the K&N E-1000. It is taller but same outside diameter.

You take the standard filter box...
Forum: Electrical Systems 05-03-2020, 08:43 AM
Replies: 23
Views: 2,726
Posted By Carl Froehlich
Some thoughts: - If your battery is flat, this is...

Some thoughts:
- If your battery is flat, this is a hard “ground the airplane” issue. Use a real charger to bring it back, or better yet replace it as most AGM batteries suffer permanent capacity...
Forum: RV-10 05-02-2020, 05:44 PM
Replies: 14
Views: 1,557
Posted By Carl Froehlich
To answer the question, no - this is way wrong. ...

To answer the question, no - this is way wrong. The RV-10 has massive nose up trim range, even when solo with nothing in the back. There is always enough trim to take the pressure off the...
Forum: RV-8/8A 05-02-2020, 04:47 PM
Replies: 11
Views: 781
Posted By Carl Froehlich
Instead of hauling lead for ballast, install a...

Instead of hauling lead for ballast, install a second battery in the aft battery mount.

Carl
Forum: RV-8/8A 05-02-2020, 12:05 PM
Replies: 11
Views: 781
Posted By Carl Froehlich
Thanks for all the replies. The data confirms...

Thanks for all the replies.

The data confirms that the plane is not tail heavy, but that the HS is providing too much downward force. I’ll now proceed with the “load the plane to increasingly aft...
Forum: RV General Discussion/News 05-02-2020, 12:00 PM
Replies: 10
Views: 721
Posted By Carl Froehlich
Two thoughts: - I suspect you have a massive...

Two thoughts:
- I suspect you have a massive engine ignitions noise issue feeding into your GS receiver. One way to check this is replace the 18” antenna with one cut for VOR frequencies (about 51”...
Forum: RV General Discussion/News 05-02-2020, 11:48 AM
Replies: 34
Views: 2,475
Posted By Carl Froehlich
Strongly recommend sticking with the B&C...

Strongly recommend sticking with the B&C regulators - especially the SB regulator. When stuff happens having the SB alternator automatically pick up the load is well worth it. Less pilot action to...
Forum: RV-8/8A 05-02-2020, 07:16 AM
Replies: 11
Views: 781
Posted By Carl Froehlich
What is your solo CG?

A follow up to my earlier post on HS rigging. I would be interested in what others have for their empty CG and solo CG. Mine are:
Empty: 78.18”
Solo: 80.4”

Thanks,
Carl
Forum: RV-8/8A 05-01-2020, 04:45 PM
Replies: 5
Views: 638
Posted By Carl Froehlich
Yes, the hinge line is an issue. The last time I...

Yes, the hinge line is an issue. The last time I did this however, using a small shim, there is enough adjustment room on the rudder journal bearings to accommodate.

So right now the response to my...
Forum: RV-8/8A 05-01-2020, 03:00 PM
Replies: 5
Views: 638
Posted By Carl Froehlich
Horizontal Stabilizer rigging

All,

Pushing 10 hours on N8PH. I note that on landing I'm using a lot less nose up trim than I did on the RV-8A. My solo CG is at 80.4" (CG limit is 78.7" to 86.82").

On today's flight I took a...
Forum: Glass Cockpit 05-01-2020, 11:44 AM
Replies: 9
Views: 638
Posted By Carl Froehlich
Keep in mind that while the SkyView will handle...

Keep in mind that while the SkyView will handle over voltage the other stuff in your panel may not (e.g. GTN-650), and you will want to run the whole panel to do all your configuration work.

Just be...
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