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Search: Posts Made By: Carl Froehlich
Forum: RV-10 Today, 10:15 AM
Replies: 28
Views: 6,892
Posted By Carl Froehlich
Careful with this. That pitot mount should have...

Careful with this. That pitot mount should have support from a rib as well as the skin.

Carl
Forum: RV-7/7A Yesterday, 02:34 PM
Replies: 30
CHT
Views: 2,114
Posted By Carl Froehlich
Look at the back of your flywheel the next time...

Look at the back of your flywheel the next time you have the top cowl off. The back has timing marks just like the front, just clocked in a different place. The reference line is the engine case...
Forum: RV-7/7A Yesterday, 09:54 AM
Replies: 30
CHT
Views: 2,114
Posted By Carl Froehlich
Colin, While I have no issue with the...

Colin,

While I have no issue with the recommendations on engine cooling checks, your numbers are still way out of line for an engine with the right timing and right fuel flow, regardless of...
Forum: RV General Discussion/News Yesterday, 09:47 AM
Replies: 14
Views: 920
Posted By Carl Froehlich
+1. Wheel pants one color make down the road...

+1. Wheel pants one color make down the road maintenance SO much easier.

Carl
Forum: RV-7/7A 08-21-2019, 03:27 PM
Replies: 30
CHT
Views: 2,114
Posted By Carl Froehlich
Colin, This just does not add up. Based on...

Colin,

This just does not add up.

Based on your data, I would suspect timing but you ruled that out. Here you may want to check the timing setting with a light - just to make sure.

A local RV-7...
Forum: RV General Discussion/News 08-21-2019, 10:46 AM
Replies: 13
Views: 1,182
Posted By Carl Froehlich
Just a contrarian side note. If you go through...

Just a contrarian side note.

If you go through all the trouble of prepping the interior for paint, the paint part is easy in comparison.

I have never had any decent results using rattle cans - on...
Forum: RV-7/7A 08-21-2019, 09:51 AM
Replies: 30
CHT
Views: 2,114
Posted By Carl Froehlich
Collin, Something is not right. You might want...

Collin,

Something is not right.

You might want to mention your fuel flows. I’m no carburetor expert but I would verify the engine is getting enough fuel when ROP.

Carl
Forum: Electronic Ignition Systems 08-20-2019, 08:45 AM
Replies: 10
Views: 1,589
Posted By Carl Froehlich
Joe, Ignition install delayed until after return...

Joe,

Ignition install delayed until after return from a long West Coast trip.

Carl
Forum: RV General Discussion/News 08-19-2019, 06:21 PM
Replies: 24
Views: 1,720
Posted By Carl Froehlich
Not the best option. The second alternator...

Not the best option. The second alternator mitigates only one of the risks to loosing power to your panel, loss of the primary alternator. While this might be the most probable casualty, loosing...
Forum: RV General Discussion/News 08-19-2019, 09:26 AM
Replies: 56
Views: 4,085
Posted By Carl Froehlich
+1 on Dan’s post. Take a day to balance the...

+1 on Dan’s post.

Take a day to balance the injectors and run ~20 degrees LOP, 2350-2500 RPM (simple swap out of $26 injector nozzles from AirFlow Performance). The 20 degrees LOP achieves:
-...
Forum: RV-10 08-18-2019, 01:07 PM
Replies: 10
Views: 1,478
Posted By Carl Froehlich
Here is a nice tool a friend made for his RV-14. ...

Here is a nice tool a friend made for his RV-14. Slip it over the end of the filter, tighten the bolt on top and let it drain via a hose on the bottom. Not a drop is spilled.

Enough people have...
Forum: RV Building Tips/Techniques 08-17-2019, 02:42 PM
Replies: 23
Views: 757
Posted By Carl Froehlich
For the RV-10 I liked the following setup: - one...

For the RV-10 I liked the following setup:
- one 8’x3’ table, 36” tall
- one 8’x3’ table, 26” tall
- one 4’x6’ table, 36” tall on wheels

The table on wheels was the “do the sub assembly” table. The...
Forum: Glass Cockpit 08-17-2019, 09:06 AM
Replies: 13
Views: 1,150
Posted By Carl Froehlich
What I do

Two SkyView EFIS displays and a GTN-650.

The GTN-650 display is rarely used as it is that inferior to the SkyView displays. It does fill the function, via the SkyView ARINC, of displaying the...
Forum: Electrical Systems 08-17-2019, 08:52 AM
Replies: 6
Views: 354
Posted By Carl Froehlich
To do an “Avionics Master” switch, I strongly...

To do an “Avionics Master” switch, I strongly recommend doing two. Run the left EFIS, Comm #1, XPDR, Audio Panel, trim and such off one, the right EFIS, Comm #2, autopilot servos, flaps and such off...
Forum: RV General Discussion/News 08-16-2019, 07:24 AM
Replies: 7
Views: 387
Posted By Carl Froehlich
There is no issue with running the GPS-250...

There is no issue with running the GPS-250 receiver while using the GTN-650 as your GPS source input to the transponder. That is my normal setup.

As your install has worked before I suspect this...
Forum: RV General Discussion/News 08-13-2019, 10:58 AM
Replies: 10
Views: 512
Posted By Carl Froehlich
Heat gun. Carl

Heat gun.

Carl
Forum: RV General Discussion/News 08-13-2019, 07:23 AM
Replies: 19
Views: 1,305
Posted By Carl Froehlich
Larry - you don’t have an inline breaker for each...

Larry - you don’t have an inline breaker for each pMag to pull?

Carl
Forum: RV General Discussion/News 08-12-2019, 07:34 AM
Replies: 19
Views: 1,305
Posted By Carl Froehlich
1. I do the internal generator check maybe twice...

1. I do the internal generator check maybe twice a year. The pMags are on pull breakers. Don't be surprised if the internal generator works down to 750 RPM or so.
2. 100 hour checks - nothing...
Forum: Traditional Aircraft Engines 08-11-2019, 01:49 PM
Replies: 7
Views: 472
Posted By Carl Froehlich
For the first flight just stay at full rich. You...

For the first flight just stay at full rich. You will have enough stuff to do and check other than worrying if you are at 150 degrees rich of peak. The extra fuel will be a benefit to mitigate the...
Forum: Electrical Systems 08-11-2019, 01:04 PM
Replies: 13
Views: 703
Posted By Carl Froehlich
Sorry - does not work that way. How many cars do...

Sorry - does not work that way. How many cars do you know that had this happen? For that matter, using your example if you had a wire short in the wing, and your in line breaker did not work, the...
Forum: RV General Discussion/News 08-11-2019, 12:02 PM
Replies: 55
Views: 3,374
Posted By Carl Froehlich
Don’t be so sure. I was amazed at how much time...

Don’t be so sure. I was amazed at how much time I ended up flying in the right seat of the RV-10.

Carl
Forum: Electrical Systems 08-11-2019, 11:29 AM
Replies: 13
Views: 703
Posted By Carl Froehlich
As been mentioned, measuring current is not a...

As been mentioned, measuring current is not a requirement. The health of your electrical system is much better reflected by voltage. Recall that back in the day all cars had a ammeter and but no...
Forum: RV General Discussion/News 08-10-2019, 03:41 PM
Replies: 55
Views: 3,374
Posted By Carl Froehlich
You touch the SkyView Knob Panel more than...

You touch the SkyView Knob Panel more than anything else on the panel. Put it where your right hand can easily fall on it (as in low and left). Similarly the Autopilot panel is touched more than...
Forum: Electrical Systems 08-10-2019, 01:28 PM
Replies: 13
Views: 904
Posted By Carl Froehlich
A drawback of “kits”. Drilling out a connector...

A drawback of “kits”.

Drilling out a connector is really only applicable to the big battery connectors that come undersized - for just this reason. The difference is they have plenty of meat left...
Forum: RV models of the future (RV-??) 08-07-2019, 04:37 PM
Replies: 51
Views: 5,755
Posted By Carl Froehlich
I’ll have to disagree. The IO-540 is a good...

I’ll have to disagree. The IO-540 is a good match for the RV-10. Anything less and you end up with an underpowered four seat plane that can really only carry two real people, either the RV-10 or a...
Forum: RV models of the future (RV-??) 08-07-2019, 03:11 PM
Replies: 51
Views: 5,755
Posted By Carl Froehlich
I hear this about the RV-10 as well. Some...

I hear this about the RV-10 as well. Some thoughts:
- The RV-14(A) has a lot of stuff like match drilled holes that can be incorporated into other RV kits.
- The RV-10 build time has a lot to do...
Forum: RV General Discussion/News 08-04-2019, 07:42 PM
Replies: 5
Views: 698
Posted By Carl Froehlich
Replacement aluminum is amazingly inexpensive, so...

Replacement aluminum is amazingly inexpensive, so don’t hesitate to just call Van’s an order replacement parts. There is no reason to have an airplane that every time you look at it you think “I...
Forum: RV-14 08-03-2019, 03:18 PM
Replies: 11
Views: 917
Posted By Carl Froehlich
Yep - the Dynon ADHARS module just slides in and...

Yep - the Dynon ADHARS module just slides in and is then held in place by the spring clip. Dynon also sells an adapter plate so you can stack the second ADHARS module on top of the first - that just...
Forum: Electrical Systems 08-03-2019, 09:08 AM
Replies: 35
Views: 1,536
Posted By Carl Froehlich
Jereme, To answer your question, yes, you are...

Jereme,

To answer your question, yes, you are still building in single point failures.

On your ebuss or whatever you want to call it, you can have multiple ways of getting power to it, but you have...
Forum: RV-14 08-03-2019, 07:40 AM
Replies: 17
Views: 991
Posted By Carl Froehlich
Dave, Look at page 13-16 of the AeroElectric...

Dave,

Look at page 13-16 of the AeroElectric Connection. Keep the “triangle” dimensions the same - the gamma match section. Extend the arm out from the wing rib as far as you can. You will need...
Forum: RV-14 08-02-2019, 03:59 PM
Replies: 17
Views: 991
Posted By Carl Froehlich
I make my own wingtip VOR/LOC/ILS antennas. As...

I make my own wingtip VOR/LOC/ILS antennas. As shown in the photo the antenna is mounted on a short piece of thin 3/4”x3/4” angle that is attached to the end rib with a couple of screws. The...
Forum: Electrical Systems 08-02-2019, 02:37 PM
Replies: 35
Views: 1,536
Posted By Carl Froehlich
For VFR with pMags this is not as critical. For...

For VFR with pMags this is not as critical. For IFR with dual glass panels these single battery designs typically produce single point failure risks (note - the second alternator mitigates the one...
Forum: Electrical Systems 08-02-2019, 12:58 PM
Replies: 35
Views: 1,536
Posted By Carl Froehlich
Jereme, PM me your email address and I’ll...

Jereme,

PM me your email address and I’ll provide my power distribution scheme, and design objectives it supports.

Carl
Forum: RV General Discussion/News 08-02-2019, 11:31 AM
Replies: 8
Views: 578
Posted By Carl Froehlich
I offer that the standard spade connectors are...

I offer that the standard spade connectors are not the root problem. It is the wires on the probe side of the connectors. In other words, the probe wire is a real pain to get a good crimp on the...
Forum: Places To Fly...Things to See...Things to Eat 08-02-2019, 11:17 AM
Replies: 10
Views: 5,972
Posted By Carl Froehlich
Don’t overlook Shannon Airport (KEZF) at...

Don’t overlook Shannon Airport (KEZF) at Fredericksburg. The Shannon Air Museum is a labor of love for many local pilots, and has at least one plane that you will not find anywhere else - the Vultee...
Forum: Electrical Systems 08-02-2019, 09:04 AM
Replies: 35
Views: 1,536
Posted By Carl Froehlich
Exactly correct. Essential buss schemes may...

Exactly correct. Essential buss schemes may support vacuum pumps and spinning iron gyros but they fall short of the mark for modern, IFR dual glass installs - even less for aircraft power dependent...
Forum: RV-14 08-02-2019, 08:56 AM
Replies: 21
Views: 1,830
Posted By Carl Froehlich
FM-150. I tried every orientation, talked to Don...

FM-150.
I tried every orientation, talked to Don at AFP as well as Thunderbolt. The lower cowl curves up too fast. I found one way to do it but this would require modifying the control linkages, the...
Forum: Traditional Aircraft Engines 08-02-2019, 08:19 AM
Replies: 21
Views: 3,471
Posted By Carl Froehlich
This is the right way - but do not overlook all...

This is the right way - but do not overlook all the opportunity offered by a dual battery setup like this beyond just ignition power backup. In other words think “system” not just “component”.

I...
Forum: RV-14 08-02-2019, 08:07 AM
Replies: 21
Views: 1,830
Posted By Carl Froehlich
There are several posts on AFP on an RV-14 IO-390...

There are several posts on AFP on an RV-14 IO-390 engine so recommend a quick search. If memory serves you will need to modify the snorkel, but most important is you need to give Dan at AFP a call...
Forum: VAF Classifieds (posts in here deleted after 30 days) 07-30-2019, 09:55 AM
Replies: 1
Views: 226
Posted By Carl Froehlich
FS, new Van’s RV-8 canopy cover

Standard LW-8 cover from Van’s, new in the bag. List price $185. I’m asking $140 plus shipping.

PM if interested.
Carl
Forum: RV General Discussion/News 07-27-2019, 10:23 AM
Replies: 10
Views: 954
Posted By Carl Froehlich
Fabric out. Less likely to wear the rubber as...

Fabric out. Less likely to wear the rubber as compared to the hose clamps against the rubber on the outside.

Carl
Forum: Electrical Systems 07-26-2019, 09:30 AM
Replies: 51
Views: 3,359
Posted By Carl Froehlich
Yep, this is the part I trip on. I had one over...

Yep, this is the part I trip on.

I had one over voltage incident over the years, and that is when I found out crowbar over voltage protection is great in theory but this time it did not work. It...
Forum: Electrical Systems 07-25-2019, 05:52 PM
Replies: 51
Views: 3,359
Posted By Carl Froehlich
30 minutes is not sufficient, especially for an...

30 minutes is not sufficient, especially for an IFR plane.

Carl
Forum: RV General Discussion/News 07-25-2019, 10:02 AM
Replies: 7
Views: 600
Posted By Carl Froehlich
Paul, I have seen RVs with such a problem and...

Paul,

I have seen RVs with such a problem and they all shared the same issue, during cowl fit the front of the cowl was not trimmed enough to achieve a perfect circle. While I note your statement...
Forum: Electrical Systems 07-25-2019, 09:46 AM
Replies: 51
Views: 3,359
Posted By Carl Froehlich
This has been discussed in the past, but I fear...

This has been discussed in the past, but I fear the implications of such “Self Protect” batteries are not being considered in electrical designs.

What should be the most reliable component in...
Forum: Electronic Ignition Systems 07-23-2019, 05:31 PM
Replies: 10
Views: 1,589
Posted By Carl Froehlich
Here you...

Here you go.
Carl
https://i.postimg.cc/ydMJpsWm/81-AFB8-D1-BB7-B-4-E7-B-8-DDD-1-B8-C4-A781-BD0.jpg
https://i.postimg.cc/4NBfmXZW/A2-BBFED5-3237-4-DE4-B21-A-03661-ABBEF49.jpg
Forum: Electronic Ignition Systems 07-23-2019, 01:52 PM
Replies: 10
Views: 1,589
Posted By Carl Froehlich
The first production run will be Experimental.

The first production run will be Experimental.
Forum: Electronic Ignition Systems 07-23-2019, 12:59 PM
Replies: 10
Views: 1,589
Posted By Carl Froehlich
Six Cylinder pMag in hand

Brad handed over a six cylinder pMag and install kit at Oshkosh today. This is a trial unit for what will be the main production run.

It looks like the long road to a six cylinder pMag is finally...
Forum: Traditional Aircraft Engines 07-22-2019, 07:13 AM
Replies: 5
Views: 938
Posted By Carl Froehlich
Are you running Lightspeed ignitions? Carl

Are you running Lightspeed ignitions?

Carl
Forum: Glass Cockpit 07-17-2019, 11:59 AM
Replies: 8
Views: 917
Posted By Carl Froehlich
The SkyView transponder is, I believe, one of the...

The SkyView transponder is, I believe, one of the best values out there. It meets the ADS-B out requirement, provides TIS displayed on the SkyView moving map, and is less cost than the other...
Forum: RV-14 07-17-2019, 11:45 AM
Replies: 10
Views: 974
Posted By Carl Froehlich
As I have posted in the past, my one experience...

As I have posted in the past, my one experience with the RV-14 wiring kits leads to my recommendation to just make your own wire runs. This is especially true if you what to do something other than...
Forum: Electronic Ignition Systems 07-14-2019, 12:32 PM
Replies: 11
Views: 1,336
Posted By Carl Froehlich
Talk to Brad at Oshkosh. There seems be a light...

Talk to Brad at Oshkosh. There seems be a light at the end of the tunnel.

Carl
Forum: RV-10 07-11-2019, 04:55 PM
Replies: 22
Views: 2,435
Posted By Carl Froehlich
Go with your instincts and leave them out. The...

Go with your instincts and leave them out. The new owner of my RV-10 installed them and I hate the way they ruin the otherwise superb visibility.

Invest in good sunglasses and fly on.

Carl
Forum: Steam Gauges 07-08-2019, 08:40 PM
Replies: 6
Views: 749
Posted By Carl Froehlich
Calibrating an airspeed instrument is not hard,...

Calibrating an airspeed instrument is not hard, if you first set up a reference manometer and be patient..
https://i.postimg.cc/PqDsFbQw/30-A1-DAD3-1-C07-4-FE2-B65-B-8778-B9-A1-A4-EB.jpg
The airspeed...
Forum: Glass Cockpit 07-06-2019, 05:47 PM
Replies: 12
Views: 953
Posted By Carl Froehlich
I have been surprised at the anguish in this...

I have been surprised at the anguish in this thread over what I see is little more than a marketing tool. I have flown a lot of IFR with the SkyView and GTN-650 and do not find changing the...
Forum: RV-10 07-03-2019, 09:45 AM
Replies: 39
Views: 2,171
Posted By Carl Froehlich
Inadvertent ELT operational test

As a data point for an ELT antenna mounted under the empennage fairing. An RV flying with this set up did an inadvertent ELT activation while flying. The ELT was on for perhaps 15 seconds. This...
Forum: Electrical Systems 07-03-2019, 07:26 AM
Replies: 10
Views: 816
Posted By Carl Froehlich
Recommend you consider not using one of these...

Recommend you consider not using one of these 1960 clunky ground power plugs at all.

Your airplane is not a car and should not be treated as such. If you need to jump start your airplane, you have...
Forum: Glass Cockpit 07-03-2019, 07:01 AM
Replies: 59
Views: 7,451
Posted By Carl Froehlich
Or the other option is to not use the VPX at all....

Or the other option is to not use the VPX at all. I don’t.

Carl
Forum: Glass Cockpit 07-02-2019, 11:21 AM
Replies: 59
Views: 7,451
Posted By Carl Froehlich
First make sure you are running the current...

First make sure you are running the current operating software (15.4.7).

Next verify both serial “lows” are connected and the same. For the SkyView this is ground. I don’t know what the VPX...
Forum: RV General Discussion/News 07-01-2019, 09:09 AM
Replies: 56
Views: 4,719
Posted By Carl Froehlich
I hate traditional key igntion switches. I use a...

I hate traditional key igntion switches. I use a locking toggle switch for each ignition and a push button starter switch.

Theft is not my primary concern. I worry about some kid climbing in and...
Forum: Electronic Ignition Systems 06-28-2019, 06:17 AM
Replies: 4
Views: 556
Posted By Carl Froehlich
Check timing with a light

Recently an RV owner complained about extremely high CHT on his dual electronic ignition engine. The ignitions use a crank sensor and nothing unusual was found. With a timing light however timing...
Forum: Traditional Aircraft Engines 06-27-2019, 03:49 PM
Replies: 20
Views: 3,234
Posted By Carl Froehlich
Been there, done that

Had the exact same thing happen to me on a rental plane back in the day. The cause was a lost bolt in that cylinder’s intake tube where it connects to the cylinder. At high RPM there was enough...
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