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Search: Posts Made By: Carl Froehlich
Forum: RV General Discussion/News 06-14-2019, 08:26 AM
Replies: 35
Views: 3,548
Posted By Carl Froehlich
Loop the line around the two inboard elevator...

Loop the line around the two inboard elevator hinges. I use a 2” or so piece of heat shrink on the end of the lines to make it easy to fish up around the hinge. Tie with a bowline knot - not a slip...
Forum: RV General Discussion/News 06-13-2019, 10:17 AM
Replies: 35
Views: 3,548
Posted By Carl Froehlich
Or, just keep it simple, light and cheap. ...

Or, just keep it simple, light and cheap. Compared to other approaches, this is stronger as you are not fighting the large rudder leverage arm like locks close to the hinge line. A padded piece of...
Forum: RV-8/8A 06-12-2019, 04:56 PM
Replies: 12
Views: 1,695
Posted By Carl Froehlich
Like Larry said, build new tanks. Find a local...

Like Larry said, build new tanks. Find a local builder to assist.

I offer that this is just the first indication of a host of problems.

Carl
Forum: RV General Discussion/News 06-11-2019, 05:45 PM
Replies: 16
Views: 1,036
Posted By Carl Froehlich
Buy the engine and prop at the last “Van’s Show...

Buy the engine and prop at the last “Van’s Show Special” that you can wait. Engine is required for cowl fit up.

Decide on the brand of avionics you want, then buy the mounting kits for the...
Forum: Glass Cockpit 06-11-2019, 10:16 AM
Replies: 7
Views: 643
Posted By Carl Froehlich
Exactly my point - why should we be forced to...

Exactly my point - why should we be forced to scrounge for a copy of the GTN-650 install manual on top of paying a premium price for the box? Garmin should be proud to provide a link to updated...
Forum: Glass Cockpit 06-11-2019, 08:52 AM
Replies: 7
Views: 643
Posted By Carl Froehlich
Brad - how about giving us all a break and talk...

Brad - how about giving us all a break and talk corporate Garmin into letting builders download the install manuals for the GTN-650 and such?

Carl
Forum: Fuel Injection Systems 06-11-2019, 08:02 AM
Replies: 8
Views: 826
Posted By Carl Froehlich
I flew an RV with the Ellison TBI. My evaluation...

I flew an RV with the Ellison TBI. My evaluation was it is better than a carburetor but not as good as standard fuel injection for how I fly.

Carl
Forum: RV-14 06-11-2019, 07:57 AM
Replies: 10
Views: 1,129
Posted By Carl Froehlich
Or.... Prime during construction once, then...

Or....

Prime during construction once, then never have the need for repeated Corrosion X applications over the life of the airplane. Leave Corrosion X for the spam can owners.

“Pay me now or pay...
Forum: RV Ongoing Maintenance Issues 06-10-2019, 11:23 AM
Replies: 15
Views: 695
Posted By Carl Froehlich
By chance is this a pitot/static combination...

By chance is this a pitot/static combination pitot, the kind that has the static holes drilled along the circumference of the probe (the old Gretz heated pitot)?

Carl
Forum: Electronic Ignition Systems 06-10-2019, 07:28 AM
Replies: 73
Views: 6,490
Posted By Carl Froehlich
I don’t recommend running any alternator without...

I don’t recommend running any alternator without a battery. Happy do provide some detail if you PM me your email address.

Sorry Dan for the thread drift - just answering Oly’s question.
Carl
Forum: RV-14 06-10-2019, 07:17 AM
Replies: 5
Views: 561
Posted By Carl Froehlich
Yep - wait to fit wingtips until after wings on,...

Yep - wait to fit wingtips until after wings on, flaps and ailerons rigged and rigging checked by a trusted helper who has experience.

The tooling holes are a nice place to start, but not absolute. ...
Forum: VAF Classifieds (posts in here deleted after 30 days) 06-10-2019, 07:07 AM
Replies: 12
Views: 2,200
Posted By Carl Froehlich
Have you ruled out painting it yourself? ...

Have you ruled out painting it yourself? Temporary paint booths are easy enough. The big problem is having the space (I have my own hangar so not an issue for me). If you have another RV guy who...
Forum: RV Ongoing Maintenance Issues 06-09-2019, 06:14 PM
Replies: 15
Views: 695
Posted By Carl Froehlich
Has it always done this, or is this a new...

Has it always done this, or is this a new issue?

What pitot are you using?

Carl
Forum: Electronic Ignition Systems 06-09-2019, 10:17 AM
Replies: 73
Views: 6,490
Posted By Carl Froehlich
The short answer is no. There are many practical...

The short answer is no.

There are many practical options to support dual ship power dependent ignitions, this is not one of them.

Carl
Forum: Electrical Systems 06-08-2019, 11:16 AM
Replies: 37
Views: 2,406
Posted By Carl Froehlich
I suggest looking at a “start permissive” key...

I suggest looking at a “start permissive” key switch. This can be either a keyed switch or a simple hidden toggle switch. If you use a keyed switch look for a 10 amp contact switch, like this:...
Forum: RV-10 06-08-2019, 07:26 AM
Replies: 8
Views: 811
Posted By Carl Froehlich
Get the right nose axle nut tension, but then...

Get the right nose axle nut tension, but then work the other issues, such as:
- Get the replacement axle where you can dial in the bearing tension:...
Forum: RV General Discussion/News 06-07-2019, 05:31 PM
Replies: 6
Views: 709
Posted By Carl Froehlich
It is hard to beat a Van’s special with prop...

It is hard to beat a Van’s special with prop combo discount. I consider this the best engine/prop value out there.

The IO-360-M1B (180hp) with the Hartzell BA prop will provided a very efficient...
Forum: Glass Cockpit 06-04-2019, 03:42 PM
Replies: 24
Views: 1,011
Posted By Carl Froehlich
No - but a four conductor shielded wire fits the...

No - but a four conductor shielded wire fits the bill for twisted pairs, readily available and is durable.

Used this in two RVs. Will do the same in the next project.

Carl
Forum: Glass Cockpit 06-04-2019, 02:32 PM
Replies: 24
Views: 1,011
Posted By Carl Froehlich
You all make this too hard. You need a single,...

You all make this too hard.

You need a single, four conductor (#22) shielded wire for the data. A #20 for power, a #20 for ground and a #22 for disconnect. Done.

No hub, no magical harness. A...
Forum: Electrical Systems 06-04-2019, 10:08 AM
Replies: 37
Views: 2,406
Posted By Carl Froehlich
I recommend not doing this. The ease of...

I recommend not doing this. The ease of inadvertently engaging the starter motor to crank the engine when you only want to turn on the master is an unnecessary risk.

Keep the starter push...
Forum: RV-8/8A 06-04-2019, 08:29 AM
Replies: 7
Views: 561
Posted By Carl Froehlich
I'm guessing you are running a Hartzell BA CS...

I'm guessing you are running a Hartzell BA CS prop. If so, as this prop goes flat (pattern work) it becomes more of a solid disk and reduces engine cooling. While CHTs are manageable because of the...
Forum: RV General Discussion/News 06-04-2019, 08:19 AM
Replies: 3
Views: 345
Posted By Carl Froehlich
Recommend mico followed by a bunch of sanding.

Recommend mico followed by a bunch of sanding.
Forum: Electrical Systems 06-01-2019, 07:56 AM
Replies: 37
Views: 2,406
Posted By Carl Froehlich
I strongly recommend no design or inadvertent...

I strongly recommend no design or inadvertent switch setup that would allow the alternator to be connected to any buss without a battery. I note there are some aftermarket power control boxes that...
Forum: Electronic Ignition Systems 05-30-2019, 06:31 PM
Replies: 73
Views: 6,490
Posted By Carl Froehlich
This is from the Lightspeed install manual -...

This is from the Lightspeed install manual - available on Klaus’s web page.

“During start, the system will fire at TDC for standard compression engines with ratios less than 8.7:1. At idle the...
Forum: RV-10 05-30-2019, 01:29 PM
Replies: 14
Views: 1,769
Posted By Carl Froehlich
This is a common problem, most noted when the air...

This is a common problem, most noted when the air filter goes conical and starts to bounce around. I added glass to fix this the first time around, then did the aluminum plate as just adding glass...
Forum: RV-10 05-30-2019, 10:00 AM
Replies: 14
Views: 1,769
Posted By Carl Froehlich
Yep - and if you just make it like it was it will...

Yep - and if you just make it like it was it will again fail.

Install a 0.032” aluminum plate on the bottom inside of the FAB - at least as big as the outside air filter edge. The fiberglass will...
Forum: RV-14 05-30-2019, 08:18 AM
Replies: 10
Views: 938
Posted By Carl Froehlich
Like Dan said, you have problem(s) to...

Like Dan said, you have problem(s) to investigate. With a stock setup you should have lower temps. I'd start by looking for obvious stuff, like a blockage in the air going to the cooler. Leave a...
Forum: Traditional Aircraft Engines 05-27-2019, 10:05 AM
Replies: 8
Views: 658
Posted By Carl Froehlich
Here is the shot glass test result of a spider...

Here is the shot glass test result of a spider with a spec of junk in in.
Carl
https://i.postimg.cc/4dCP78km/3-DD35217-BB42-428-B-A211-E760-C7-EC6-ED1.jpg
Forum: Traditional Aircraft Engines 05-27-2019, 09:58 AM
Replies: 8
Views: 658
Posted By Carl Froehlich
Nope - spiders do not work like that. As fuel...

Nope - spiders do not work like that. As fuel flow goes up the diaphragm goes down exposing larger fuel ports. The idle port is small.

Do the shotglass test.

Carl
Forum: Traditional Aircraft Engines 05-27-2019, 07:46 AM
Replies: 8
Views: 658
Posted By Carl Froehlich
Two things to look at: - Stuck valve - A chunk of...

Two things to look at:
- Stuck valve
- A chunk of junk in the spider blocking the tiny idle port for that cylinder. The easiest check for this is the shot glass fuel flow test.

Carl
Forum: Electronic Ignition Systems 05-27-2019, 07:42 AM
Replies: 17
Views: 1,704
Posted By Carl Froehlich
Don’t assume the plug wire are good, verify with...

Don’t assume the plug wire are good, verify with a resistance check (and check the plugs center electrode resistance as well).

Lightspeed ignitions, for whatever reason, eat plug wires. I guess...
Forum: RV-10 05-26-2019, 05:39 PM
Replies: 9
Views: 935
Posted By Carl Froehlich
Yep - replace the stock tubes with ones with 90...

Yep - replace the stock tubes with ones with 90 degree valves (available at Desser Tire). Add a small hole in the wheel pant and a valve stem extender like this one: ...
Forum: RV-10 05-26-2019, 02:07 PM
Replies: 14
Views: 1,769
Posted By Carl Froehlich
I added a piece of light angle between the FAB...

I added a piece of light angle between the FAB and the engine case to reduce vibration fatigue.

Carl
https://i.postimg.cc/SNXcMfqm/46327-F04-D906-46-E5-B0-C3-6251-B433-F39-B.jpg
Forum: RV-10 05-23-2019, 09:45 AM
Replies: 10
Views: 984
Posted By Carl Froehlich
I found quality welding cable to be more durable...

I found quality welding cable to be more durable than mil spec. Remember the insulation on this stuff is designed for dragging over metal work sites. I took a torch to a piece of welding cable as a...
Forum: Electrical Systems 05-22-2019, 11:52 AM
Replies: 16
Views: 930
Posted By Carl Froehlich
I found a couple on eBay at a good price - but...

I found a couple on eBay at a good price - but they are not always available. Just check when you can, but if you need one or two now bite the $160 bullet.

Carl
Forum: Electrical Systems 05-22-2019, 07:38 AM
Replies: 16
Views: 930
Posted By Carl Froehlich
This is the one I have used in two planes (a...

This is the one I have used in two planes (a solenoid on each battery): https://www.bluesea.com/products/9012/L_Solenoid_-_12_24V_DC_250A

The value of these solenoids is the very low 0.13amp holding...
Forum: RV-8/8A 05-21-2019, 01:07 PM
Replies: 10
Views: 998
Posted By Carl Froehlich
Here is the only solution that I found to work. ...

Here is the only solution that I found to work. For those building strongly recommend getting credit for the Matco brakes & wheels and instead getting the Grove brakes and wheels. It will save you...
Forum: Glass Cockpit 05-20-2019, 10:32 AM
Replies: 15
Views: 1,286
Posted By Carl Froehlich
Danny, Simple answer - some people, like me,...

Danny,

Simple answer - some people, like me, have had bad experiences with Garmin. I have a brand new GTN-650 in the new RV-8 only because it was the least bad of all the poor TSO navigator...
Forum: Engine Monitors 05-19-2019, 01:13 PM
Replies: 2
Views: 312
Posted By Carl Froehlich
Some things to check: - Is the sender center wire...

Some things to check:
- Is the sender center wire intact?
- Is the sender really grounded? Easy check is to measure the resistance to ground on the sender base.
- Measure the resistance between the...
Forum: RV General Discussion/News 05-19-2019, 08:54 AM
Replies: 7
Views: 411
Posted By Carl Froehlich
Use the one wingtip NAV antenna with a diplexer. ...

Use the one wingtip NAV antenna with a diplexer. The signal loss of the diplexer is less than can be noticed in any practical application. The gear leg antenna however would be, under the best...
Forum: RV-8/8A 05-17-2019, 07:46 AM
Replies: 17
Views: 1,164
Posted By Carl Froehlich
+1 on this. The ballon leak test is good for...

+1 on this. The ballon leak test is good for obvious leaks, but not for finding those irritating “weeping rivets” that are good for showing up just after you paint.

After I’m done building the...
Forum: RV-10 05-16-2019, 01:18 PM
Replies: 12
Views: 1,125
Posted By Carl Froehlich
And you forgot to look at your avionic supply...

And you forgot to look at your avionic supply voltage specs. 15vdc is too high.

Your alternator voltage regulator is going south.

Carl
Forum: Electrical Systems 05-16-2019, 01:15 PM
Replies: 12
Views: 927
Posted By Carl Froehlich
Yep - you wired it just like they said - and...

Yep - you wired it just like they said - and found an inherent problem in the design. I suspect as this is a new problem the alternator has an issue so that would be the next step.

Carl
Forum: Electrical Systems 05-16-2019, 11:14 AM
Replies: 12
Views: 927
Posted By Carl Froehlich
The alternator output should go to the load side...

The alternator output should go to the load side of your master relay(s), not hard wired to the battery.

Carl
Forum: RV-10 05-16-2019, 08:00 AM
Replies: 10
Views: 918
Posted By Carl Froehlich
Stay with the 60 amp alternator

What you did not include was battery charging load. After start this could be the largest load on the alternator. This is not a trivial issue for an electrically dependent IFR plane.

The 40 amp...
Forum: Autopilots 05-15-2019, 01:13 PM
Replies: 13
Views: 1,177
Posted By Carl Froehlich
Perhaps. As you are manually smoothing out the...

Perhaps.

As you are manually smoothing out the error signal (the needles) that still leaves the possibility the error signal noise from the GTN-650 is causing your problem in the coupled approach...
Forum: Autopilots 05-15-2019, 12:15 PM
Replies: 13
Views: 1,177
Posted By Carl Froehlich
Ok - got it. As I posted, my SkyView/GTN-650...

Ok - got it.

As I posted, my SkyView/GTN-650 RV-10 install did the LPV approach with needles centered, every time.

So what could be the issue:
- Autopilot tuning? I’m using the default settings...
Forum: Autopilots 05-15-2019, 08:11 AM
Replies: 13
Views: 1,177
Posted By Carl Froehlich
I note the common thread - the SkyView EFIS and...

I note the common thread - the SkyView EFIS and autopilot is “on rails” when following a GPS LP approach, but not when on a non-gps approach.

The SkyView coupled approach is only as good as the...
Forum: RV-8/8A 05-14-2019, 08:08 AM
Replies: 10
Views: 998
Posted By Carl Froehlich
Really? Have you tried sliding out the caliper...

Really?

Have you tried sliding out the caliper like you need to do when replacing the inboard brake pad?

Carl
Forum: RV-8/8A 05-13-2019, 05:40 PM
Replies: 10
Views: 998
Posted By Carl Froehlich
RV-8 brakes with Grove gear legs

Builder tip - I receive Matco brake calipers with my kit. The Matco is just different enough to make fit up a real pain if you have the Grove gear legs. They can be made to fit, but you will need...
Forum: RV-10 05-12-2019, 04:57 PM
Replies: 12
Views: 1,125
Posted By Carl Froehlich
Yes, this is a problem. Suggest you first...

Yes, this is a problem.

Suggest you first connect a simple multimeter and verify your engine monitor is accurately reading buss voltage (you need not run the engine, just compare the readings). If...
Forum: Traditional Aircraft Engines 05-12-2019, 11:54 AM
Replies: 12
Views: 713
Posted By Carl Froehlich
For a quick check of just the spider, you can...

For a quick check of just the spider, you can disconnect the line at the injector (leave injectors installed) and put a shot glass under each disconnected line.

Carl
Forum: Traditional Aircraft Engines 05-12-2019, 07:50 AM
Replies: 12
Views: 713
Posted By Carl Froehlich
No - just at idle or low power. The symptoms...

No - just at idle or low power. The symptoms were similar to a sticking valve.

Carl
Forum: Traditional Aircraft Engines 05-12-2019, 07:30 AM
Replies: 12
Views: 713
Posted By Carl Froehlich
+1 to do this. Suggest you first do the shot...

+1 to do this.
Suggest you first do the shot glass test to measure flow to each cylinder. Did this on an IO-360 with the same problem to find one cylinder getting much less flow at idle. The root...
Forum: RV Building Tips/Techniques 05-11-2019, 07:29 AM
Replies: 4
Views: 798
Posted By Carl Froehlich
What I do: - Take out everything you can (as in...

What I do:

- Take out everything you can (as in bolted but not riveted). This includes floors, wire runs, control sticks and tubes, rudder pedals, etc.

- Clean with something like Coleman fuel...
Forum: RV-9/9A 05-11-2019, 07:18 AM
Replies: 15
Views: 1,368
Posted By Carl Froehlich
Flaps are but one item that can create a heavy...

Flaps are but one item that can create a heavy wing - but easy to fix. Most overlooked (and fairly common) are low/high/in/out aileron brackets.

Recommend stepping back and spending some time to...
Forum: COMM 05-10-2019, 10:49 AM
Replies: 10
Views: 1,322
Posted By Carl Froehlich
Typically it would affect reception but not...

Typically it would affect reception but not transmission.

I suspect you have another issue to find other than static.

Carl
Forum: RV-9/9A 05-10-2019, 10:24 AM
Replies: 15
Views: 1,368
Posted By Carl Froehlich
To the OP question, yes you can check aileron...

To the OP question, yes you can check aileron rigging without taking off the wingtips.

But, you have multiple issues to be checked and fixed. If you rely on the “tooling holes” approach to rigging...
Forum: RV General Discussion/News 05-10-2019, 08:35 AM
Replies: 7
Views: 774
Posted By Carl Froehlich
The short answer is no. I also add a drop of oil...

The short answer is no.

I also add a drop of oil on each pin to make it easier.

Carl
Forum: Traditional Aircraft Engines 05-08-2019, 10:33 AM
Replies: 6
Views: 878
Posted By Carl Froehlich
In practice this is much simpler: - WOT all the...

In practice this is much simpler:

- WOT all the time. Cruise altitude is typically 8K' to 14K' depending on the winds and mountains. WOT will be something less than 24"

- Select RPM for the...
Forum: RV-10 05-08-2019, 07:09 AM
Replies: 19
Views: 794
Posted By Carl Froehlich
Find a new DAR that has a clue on how antennas...

Find a new DAR that has a clue on how antennas work - and how you match the antennas to the need. How many of you walk around with a full size antenna connected to your handheld radio because “it...
Forum: RV-10 05-07-2019, 02:17 PM
Replies: 39
Views: 4,139
Posted By Carl Froehlich
As with any RV, efficient cruise speed is a...

As with any RV, efficient cruise speed is a result of many factors:
- Rigging. How clean is the plane?
- Weight. There are some real fat boy RV-10s out there.
- Prop. There are smooth props and...
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