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Search: Posts Made By: Carl Froehlich
Forum: RV General Discussion/News Yesterday, 09:31 AM
Replies: 15
Views: 1,648
Posted By Carl Froehlich
Greg, You might want to get data when not so...

Greg,

You might want to get data when not so deep LOP. At altitude I find just 10–20 degrees LOP yields a nice operating point. Here I suspect power is dropping faster than fuel burn as you go...
Forum: Electronic Ignition Systems 06-21-2021, 09:00 AM
Replies: 29
Views: 2,030
Posted By Carl Froehlich
I’m not going to start a debate - I just...

I’m not going to start a debate - I just responded to the post. I would add however that I recently helped an RV guy find his dual Lightspeed timing issue - both boxes were stuck at ~40 degrees BTDC...
Forum: Electronic Ignition Systems 06-20-2021, 05:03 PM
Replies: 29
Views: 2,030
Posted By Carl Froehlich
I ran dual Lightspeed ignitions on my first RV -...

I ran dual Lightspeed ignitions on my first RV - removed them at 300 hours after multiple failures. Replaced with dual pMags which now have 1000+ trouble free hour on them.

I run dual pMags on the...
Forum: RV General Discussion/News 06-19-2021, 04:09 PM
Replies: 11
Views: 774
Posted By Carl Froehlich
Great if you only pull. The Navy taught me it is...

Great if you only pull. The Navy taught me it is hard to push a rope…..

Carl
Forum: Tools 06-19-2021, 04:08 PM
Replies: 12
Views: 2,098
Posted By Carl Froehlich
Exactly. My “big red cup set” is on RV #4. I...

Exactly. My “big red cup set” is on RV #4. I use the straight set for perhaps a dozen rivets.

Carl
Forum: RV Building Tips/Techniques 06-19-2021, 01:20 PM
Replies: 7
Views: 409
Posted By Carl Froehlich
Just to be a contrarian, I used Pro-Seal on my...

Just to be a contrarian, I used Pro-Seal on my first RV-10 (back when Van’s did not mention the tape option). I was very happy with the results. I will again use Pro-Seal on the new RV-10 project...
Forum: RV-10 06-18-2021, 09:19 PM
Replies: 7
Views: 543
Posted By Carl Froehlich
If you use a good epoxy primer, final paint will...

If you use a good epoxy primer, final paint will be a light sand then prime with the rest of the plane, followed by top coat.

Carl
Forum: RV General Discussion/News 06-18-2021, 11:37 AM
Replies: 11
Views: 774
Posted By Carl Froehlich
I tried a couple of under the tire types - all...

I tried a couple of under the tire types - all let the tail wheel pop out.

Tom Doran (RV-8A driver) made up a couple of spacers to extend the tail wheel bolt, about 3/8” on each side (you will need...
Forum: Electrical Systems 06-17-2021, 04:58 PM
Replies: 3
Views: 321
Posted By Carl Froehlich
No need to disconnect the battery, let it ride on...

No need to disconnect the battery, let it ride on the power supply just like it rides on the alternator. Your battery will be happy.

Just use a jumper to your main buss with aa ~20 amp switch...
Forum: Traditional Aircraft Engines 06-15-2021, 08:18 PM
Replies: 17
Views: 1,615
Posted By Carl Froehlich
I too am a “Mike Busch guy”. This is what I...

I too am a “Mike Busch guy”.

This is what I do:
- Lean on the ground until just before the engine stops. If you add throttle and the engine bogs down, you are just lean enough. I suspect this is...
Forum: Reviews 06-14-2021, 07:36 AM
Replies: 11
Views: 1,144
Posted By Carl Froehlich
Regardless on how you change oil and filter, I...

Regardless on how you change oil and filter, I recommend always pre-lubing the engine before engine start.

Pull a plug from each cylinder. Turn the prop by hand until you get oil pressure (with...
Forum: Glass Cockpit 06-13-2021, 08:16 AM
Replies: 15
Views: 698
Posted By Carl Froehlich
I can beat that. I download whatever software...

I can beat that. I download whatever software update I need from the Dynon website onto a thumb drive, then update the SkyView (EFIS, COMM, XPDR, whatever) while having a beer!

Carl
Forum: Glass Cockpit 06-13-2021, 07:50 AM
Replies: 15
Views: 698
Posted By Carl Froehlich
Could someone from Garmin explain why a software...

Could someone from Garmin explain why a software update is so complicated that only a certified Garmin dealer can do it?

Carl
Forum: RV-12/RV-12iS 06-12-2021, 08:58 AM
Replies: 26
Views: 1,560
Posted By Carl Froehlich
As discussed, a pneumatic squeezer is not...

As discussed, a pneumatic squeezer is not required for an RV-12 - but it will be for your next RV!

My original Avery squeezer is now working my fourth RV. Lesson to be learned - don’t sell your...
Forum: Safety 06-11-2021, 09:12 AM
Replies: 19
Views: 1,891
Posted By Carl Froehlich
A data point on under the cowl temps. This tape...

A data point on under the cowl temps. This tape records the highest temp reached. Readings on both pMags match.

Carl
https://i.postimg.cc/65CdWFNm/p-Mag-temp-6-14-20.jpg
Forum: RV-8/8A 06-11-2021, 08:06 AM
Replies: 22
Views: 2,000
Posted By Carl Froehlich
Put this under whatever you have for a rear seat....

Put this under whatever you have for a rear seat. It makes a world of difference. I did a 5.5 hour trip in the back of an 8A - not as comfortable as the front but not bad at all (and I’m not a tiny...
Forum: RV-8/8A 06-10-2021, 02:58 PM
Replies: 22
Views: 2,000
Posted By Carl Froehlich
6 hours - two legs. ~3.5 hours, gas, then 2.5...

6 hours - two legs. ~3.5 hours, gas, then 2.5 hours.

It also helps if you have oxygen and fly above the bumps (dependent on winds of course).

Carl
Forum: RV-10 06-10-2021, 08:38 AM
Replies: 8
Views: 751
Posted By Carl Froehlich
This is what I did. A couple of trimmed pieces...

This is what I did. A couple of trimmed pieces of rigid foam glued in, then McMaster self adhesive car weather stripping applied to the entire door. If memory serves this stuff was 3/8" tall - but...
Forum: Glass Cockpit 06-09-2021, 08:00 AM
Replies: 11
Views: 634
Posted By Carl Froehlich
If “access” is driving you process, I suggest...

If “access” is driving you process, I suggest another approach.

For most of the airframe wiring is independent of avionics. This is stuff like power, grounds, lights, headphone jacks and such.

For...
Forum: Glass Cockpit 06-08-2021, 01:41 PM
Replies: 17
Views: 982
Posted By Carl Froehlich
The value of having everything integrated into...

The value of having everything integrated into the EFIS moving map (TIS, ADS-B traffic, weather, terrain and obstacles) is the order of magnitude leap it provides for situation awareness.

While I...
Forum: RV-10 06-08-2021, 08:48 AM
Replies: 12
Views: 855
Posted By Carl Froehlich
Another option is to buy these pins from...

Another option is to buy these pins from IFLYRV10:
https://iflyrv10.com/index.html

You thread the door latch rod to receive these pins.

Make sure you order the pins that have the magnets already in...
Forum: Electrical Systems 06-08-2021, 05:36 AM
Replies: 2
Views: 356
Posted By Carl Froehlich
Keep in mind there is no requirement to recreate...

Keep in mind there is no requirement to recreate old school breaker buss bar schemes. I don’t use them - I don’t like thinking about a nut or screw finding its way down to short it out.

Carl
Forum: Glass Cockpit 06-07-2021, 09:14 AM
Replies: 17
Views: 982
Posted By Carl Froehlich
The mini EFIS option is ok for a backup if you...

The mini EFIS option is ok for a backup if you already have an integrated display. Running two mini EFIS drives you to cobbled together stuff for the much needed MFD.

For the RV-4 I would run (as a...
Forum: Midwest 06-06-2021, 07:26 PM
Replies: 0
Views: 211
Posted By Carl Froehlich
May move to the KBJC or KFNL area

I’d appreciate any insight into hangar availability, at KBJC, KFNL or any other field in between.

Thanks,
Carl
Forum: Glass Cockpit 06-06-2021, 11:44 AM
Replies: 17
Views: 982
Posted By Carl Froehlich
I did the incremental approach on the first...

I did the incremental approach on the first project (RV-8A). This was a VFR bird, but I added an electric AI. That was a mistake, this certified electric AI drifted so bad is was just one step...
Forum: Glass Cockpit 06-04-2021, 12:25 PM
Replies: 14
Views: 1,174
Posted By Carl Froehlich
For the last two panels I purchased the...

For the last two panels I purchased the components as a “bundle” from Stein. Total cost was better than other places.

Each set was:
- Dual SkyView HDX displays
- Garmin GTN-650 (the lesser evil of...
Forum: Traditional Aircraft Engines 06-01-2021, 04:27 PM
Replies: 3
Views: 392
Posted By Carl Froehlich
I use a combination of heat shields: 1. Prime...

I use a combination of heat shields:
1. Prime the inside with white epoxy primer.
2. For the large area, I use the nice adhesive backed aluminum from Van’s, but in areas close to the exhaust pipes...
Forum: RV-14 06-01-2021, 04:04 PM
Replies: 11
Views: 812
Posted By Carl Froehlich
Yes. Carl Plus extra characters.

Yes.

Carl
Plus extra characters.
Forum: RV-14 06-01-2021, 03:09 PM
Replies: 8
Views: 1,307
Posted By Carl Froehlich
I deviate from the plans for the R-10 (or 14)...

I deviate from the plans for the R-10 (or 14) wing root fairing. I dimple the holes, rib, backing plate and skin. I also dimple the ribs, backing plate and skin for the entire backing plate.

For...
Forum: RV-14 06-01-2021, 01:13 PM
Replies: 11
Views: 812
Posted By Carl Froehlich
You want durable, flexible and easy to install. -...

You want durable, flexible and easy to install.
- Elevator trim: Single four #22 conductor shielded wire. Two conductors to power the trim motor, one for servo position voltage, one for servo...
Forum: RV-14 05-31-2021, 07:58 PM
Replies: 25
Views: 2,999
Posted By Carl Froehlich
I just pull the associated breaker to do this...

I just pull the associated breaker to do this simple test from time to time.

Carl
Forum: RV-14 05-31-2021, 12:41 PM
Replies: 25
Views: 2,999
Posted By Carl Froehlich
If you have an old school key switch (off, left,...

If you have an old school key switch (off, left, right, both, start) there is no need for separate ignition switches. Many people (me included) do not like the old school key switch.

If you do have...
Forum: Fiberglass 05-31-2021, 12:32 PM
Replies: 4
Views: 298
Posted By Carl Froehlich
I recommend: - Setting the rivets flush or...

I recommend:
- Setting the rivets flush or slightly below flush.
- Skim coat of micro over the rivet line, let it set then sand.
- A bid of glass over the rivet line, perhaps 1” or a little wider.
-...
Forum: VAF Classifieds (posts in here deleted after 30 days) 05-31-2021, 09:56 AM
Replies: 2
Views: 609
Posted By Carl Froehlich
Aftermarket. Carl

Aftermarket.

Carl
Forum: RV-14 05-30-2021, 03:45 PM
Replies: 15
Views: 815
Posted By Carl Froehlich
One other consideration - for a tail dragger this...

One other consideration - for a tail dragger this antenna is, in my opinion, too far aft thus too close to the ground.

Carl
Forum: Glass Cockpit 05-30-2021, 02:50 PM
Replies: 18
Views: 907
Posted By Carl Froehlich
Network connections are all common to each other....

Network connections are all common to each other. The SkyView knows what is on the network, and how to talk to each unit separately. In other words think digital, not analog.

For each autopilot...
Forum: RV-14 05-30-2021, 12:08 PM
Replies: 15
Views: 815
Posted By Carl Froehlich
Of interest, you can mount and ADS-B antenna in...

Of interest, you can mount and ADS-B antenna in the tail location, then mount the SkyView ADS-B receiver near it. The receiver is connected to the SkyView serial input via a four #22 conductor...
Forum: Glass Cockpit 05-30-2021, 11:29 AM
Replies: 18
Views: 907
Posted By Carl Froehlich
You can run SkyView network connections in...

You can run SkyView network connections in series, parallel or any combination of the two.

I suggest however that you overlay some “what if” ideas into your design. For example I tend to run...
Forum: VAF Classifieds (posts in here deleted after 30 days) 05-28-2021, 10:41 AM
Replies: 2
Views: 609
Posted By Carl Froehlich
RV-10 Fiberglass Wing Root Fairings

Posting for a friend.

These have not been used (he sold the RV-10 before getting around to installing them). They cost $2000 new and he is selling for $1500.

Send me a PM and I’ll provide contact...
Forum: Traditional Aircraft Engines 05-25-2021, 04:37 PM
Replies: 44
Views: 3,493
Posted By Carl Froehlich
The short answer is no. I assume you have the...

The short answer is no.

I assume you have the pMags timed correctly (25BTDC parallel valve, 20BTDC angle head).

Carl
Forum: Traditional Aircraft Engines 05-25-2021, 01:53 PM
Replies: 44
Views: 3,493
Posted By Carl Froehlich
I suggest the old school method. If you have...

I suggest the old school method.

If you have idle mixture perfectly set (as I do) you know this by the ~50 RPM rise as you move the mixture control to cutout. At full rich idle you are still much...
Forum: Engine Monitors 05-23-2021, 09:25 AM
Replies: 3
Views: 377
Posted By Carl Froehlich
With the EMS you wire directly for RPM...

With the EMS you wire directly for RPM indication. You do not use “RPM Sensors”.

For the pMag, this is a wire between the EMS and the pMag (see the pMag install manual).

For the mag, this is a...
Forum: RV-10 05-23-2021, 08:49 AM
Replies: 13
Views: 1,075
Posted By Carl Froehlich
Front Seat Five Point

Anyone have photos of how they installed five point harnesses in the front (RV-10).

Carl
Forum: RV-10 05-21-2021, 09:47 AM
Replies: 13
Views: 1,075
Posted By Carl Froehlich
Hooker, same as the other three builds. Five...

Hooker, same as the other three builds. Five point in the rear (a must for kid seats).

More than once I was happy to have the Hooker belts. It can get bumpy over the mountains.

Carl
Forum: Electrical Systems 05-20-2021, 05:24 AM
Replies: 11
Views: 945
Posted By Carl Froehlich
The continued singular focus on a failed...

The continued singular focus on a failed alternator as the only thing that can go wrong with power distribution is, as I’ve posted in the past, short sighted.

Alternator failure is the most likely...
Forum: Traditional Aircraft Engines 05-19-2021, 05:06 PM
Replies: 17
Views: 1,097
Posted By Carl Froehlich
I assume you are fuel injected. Do a high power...

I assume you are fuel injected.

Do a high power GAMI check to see if #1 is lean compared to the others. If so, then increase the nozzle size after you verify the injector clean. The other option...
Forum: Glass Cockpit 05-19-2021, 12:48 PM
Replies: 5
Views: 602
Posted By Carl Froehlich
Only the GPS IFR Navigator. You do need to do an...

Only the GPS IFR Navigator. You do need to do an IFR pitot static check every two years.

Carl
Forum: Glass Cockpit 05-19-2021, 11:31 AM
Replies: 5
Views: 602
Posted By Carl Froehlich
Chris - PM sent. Carl

Chris - PM sent.

Carl
Forum: RV General Discussion/News 05-18-2021, 12:56 PM
Replies: 5
Views: 570
Posted By Carl Froehlich
I use this for gaskets between metal to metal...

I use this for gaskets between metal to metal parts. It is non-hardening. One can will cover a dozen planes for several...
Forum: Traditional Aircraft Engines 05-18-2021, 09:15 AM
Replies: 33
Views: 2,759
Posted By Carl Froehlich
I consider Mike Busch the engine expert on such...

I consider Mike Busch the engine expert on such things. He has stated he considers CamGaurd the only oil additive to offer a benefit - and he uses it.

I do as well.

Carl
Forum: RV General Discussion/News 05-18-2021, 08:52 AM
Replies: 36
Views: 4,741
Posted By Carl Froehlich
+1 When installing plugs, the pMag instruction...

+1

When installing plugs, the pMag instruction say to torque the plug and adapter as an assembly. Over the years I found a couple of adapters that were binding on install - to the point normal...
Forum: RV-8/8A 05-16-2021, 07:46 PM
Replies: 7
Views: 758
Posted By Carl Froehlich
You have the same ignition backup battery for 10...

You have the same ignition backup battery for 10 years? Or you have placed the ignition back battery (and its replacements) in the same place for 10 years?

I know of one RV-8 that had a very dead...
Forum: RV-10 05-16-2021, 07:30 PM
Replies: 7
Views: 683
Posted By Carl Froehlich
This is what I did on the first RV-10 build. ...

This is what I did on the first RV-10 build. I'll probably do something similar on this build.

These are standard steel angles (left over from a neighbor's Lancair 4 build). I added packing tape...
Forum: Autopilots 05-16-2021, 11:51 AM
Replies: 9
Views: 702
Posted By Carl Froehlich
To level set: - The SkyView autopilot module does...

To level set:
- The SkyView autopilot module does indeed provide the roll and pitch trim servo switching functions. It also incorporates a 3 second time out to mitigate trim running away. Any other...
Forum: RV Ongoing Maintenance Issues 05-16-2021, 10:48 AM
Replies: 20
Views: 2,298
Posted By Carl Froehlich
Ignore the fairing for now (the fairing may be...

Ignore the fairing for now (the fairing may be misleading). Is the bottom of each flap up tight against the bottom of the fuselage? If so then done. If the low flap is up as high as it can go,...
Forum: Electrical Systems 05-13-2021, 04:40 PM
Replies: 12
Views: 976
Posted By Carl Froehlich
Scott, Just to level set, I do not see any...

Scott,

Just to level set, I do not see any advantage (specifically in engine efficiency) offered from an EFII airplane over a dual pMag, standard fuel injected engine, so I have not worked this...
Forum: Traditional Aircraft Engines 05-13-2021, 12:17 PM
Replies: 14
Views: 1,345
Posted By Carl Froehlich
Look at my earlier post. I did the same process...

Look at my earlier post. I did the same process with the RV-10 (stock IO-540 and Hartzell BA prop, James Cowl). The engine was LOP ~90% of the time. Fuel burn at 170kts was 12gph low, 9.5gph high....
Forum: Traditional Aircraft Engines 05-13-2021, 11:48 AM
Replies: 14
Views: 1,345
Posted By Carl Froehlich
Frank, I suggest that the number of variables...

Frank,

I suggest that the number of variables precludes a common power setting across airframe, engine and prop combinations. For that matter altitude as well.

Propeller efficiency is not linear,...
Forum: COMM 05-13-2021, 08:17 AM
Replies: 23
Views: 1,571
Posted By Carl Froehlich
Just to close the loop on a few details. For the...

Just to close the loop on a few details.

For the wingtip antenna you have two choices, buy the Archer product or build. If you build, you must have a way to tune the antenna, such as this: ...
Forum: COMM 05-11-2021, 08:20 PM
Replies: 23
Views: 1,571
Posted By Carl Froehlich
Again, not my experience. A properly installed...

Again, not my experience.

A properly installed and tuned wingtip VOR antenna will do everything needed in any IFR environment.

Carl
Forum: COMM 05-11-2021, 07:35 PM
Replies: 23
Views: 1,571
Posted By Carl Froehlich
Exactly not my experience. My wingtip VOR...

Exactly not my experience. My wingtip VOR antenna works at 100+nmi for VORs, and ILS/GS far beyond practical range. The kicker is it cost me ~$2 of hardware beyond some left over aluminum strips. ...
Forum: Electronic Ignition Systems 05-10-2021, 03:55 PM
Replies: 12
Views: 810
Posted By Carl Froehlich
I recommend 93 octane ethanol free as the only...

I recommend 93 octane ethanol free as the only fuel to use other than 100LL. For dual pMags running either this of 100LL I also recommend setting the timing at the base for your engine - 25 degrees...
Forum: Electrical Systems 05-10-2021, 03:45 PM
Replies: 42
Views: 2,750
Posted By Carl Froehlich
I would not consider this as viable. Ground the...

I would not consider this as viable. Ground the engine to the same place you have the battery(s) grounded on the firewall. If the battery(s) are not grounded on the firewall, then I assume you...
Forum: COMM 05-10-2021, 11:12 AM
Replies: 23
Views: 1,571
Posted By Carl Froehlich
For the 750 (or 650), you just connect the VOR...

For the 750 (or 650), you just connect the VOR antenna to the tray. The 750 does the needed split internally.

The wingtip antenna will do everything you need.

Carl
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