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Search: Posts Made By: Carl Froehlich
Forum: RV-10 Yesterday, 06:54 PM
Replies: 11
Views: 884
Posted By Carl Froehlich
Makes little difference. Consider this as a...

Makes little difference. Consider this as a ďgo/no goĒ check.

Carl
Forum: RV-10 Yesterday, 06:02 PM
Replies: 11
Views: 884
Posted By Carl Froehlich
Exactly correct. Make up a couple of PVC ĎUí...

Exactly correct. Make up a couple of PVC ĎUí shape chocks and get them to just slide in when the tires are at pressure. If a tire is even a little low the chock will not slide in. As a side...
Forum: RV General Discussion/News 02-13-2019, 08:56 AM
Replies: 33
Views: 3,139
Posted By Carl Froehlich
It seems excessive cost of ownership,...

It seems excessive cost of ownership, maintenance, insurance and extra fuel burn are way down your list of priorities. Speaking for myself, the RV-10 is the only choice and Iím thrilled Vanís offers...
Forum: COMM 02-10-2019, 06:19 PM
Replies: 30
Views: 5,965
Posted By Carl Froehlich
KT, Sorry again, but your concerns are an order...

KT,

Sorry again, but your concerns are an order of magitude below practical antenna performace. For example:
- Polarization. Take your VHF comm handheld radio and listen to any tower or aircraft...
Forum: COMM 02-10-2019, 04:48 PM
Replies: 30
Views: 5,965
Posted By Carl Froehlich
Sorry - your assumptions are wrong. Only the IFR...

Sorry - your assumptions are wrong. Only the IFR GPS navigator needs this certification.

Antennas are not rocket science. For me, my homebrew VOR/LOC/ILS wingtip antenna is first choice over any...
Forum: RV General Discussion/News 02-10-2019, 10:24 AM
Replies: 2
Views: 203
Posted By Carl Froehlich
The SL-30 is still the best COMM/NAV out there so...

The SL-30 is still the best COMM/NAV out there so it commands a good price. It is a shame Garmin dropped it after buying UPS. The SL-30 feeds both primary and secondary NAV receivers to the EFIS. ...
Forum: COMM 02-06-2019, 01:38 PM
Replies: 12
Views: 577
Posted By Carl Froehlich
It is a poking hazard. Just think of your plane...

It is a poking hazard. Just think of your plane parked on the ramp and a kid runs under the tail, your plane is in the hangar and your dog runs into it or you drop something and get it right in the...
Forum: RV General Discussion/News 02-06-2019, 11:54 AM
Replies: 31
Views: 1,842
Posted By Carl Froehlich
There is no requirement to use a braided ground...

There is no requirement to use a braided ground strap, and some reasons not to.

I use the same gauge welding cable (#2) to ground the engine that runs power to the starter motor. I ground the...
Forum: RV General Discussion/News 02-04-2019, 03:13 PM
Replies: 31
Views: 1,551
Posted By Carl Froehlich
Some thoughts: - D10A over the G5 - it is far...

Some thoughts:
- D10A over the G5 - it is far more capable and where you have it there is no behind the panel space issue.
- I installed an altimeter and airspeed analog instruments in my RV-10 above...
Forum: Electrical Systems 02-01-2019, 04:50 PM
Replies: 14
Views: 806
Posted By Carl Froehlich
I would, but too many pages to upload. Happy to...

I would, but too many pages to upload.

Happy to send to anyone who PMs me their email address.

Carl
Forum: Electrical Systems 02-01-2019, 03:00 PM
Replies: 14
Views: 806
Posted By Carl Froehlich
Ed, PM me your email address and Iíll provide...

Ed,

PM me your email address and Iíll provide details on the dual battery install. It is flying on four RVs over the last decade and has proven itself.

Carl
Forum: Electrical Systems 02-01-2019, 10:49 AM
Replies: 14
Views: 806
Posted By Carl Froehlich
The GTN-650 is a power hog. If you must rely on...

The GTN-650 is a power hog. If you must rely on a backup battery then dump the GTN-650 from the backup battery load, leave COMM #2 on the backup battery. Now add the backup battery(s) for whatever...
Forum: Glass Cockpit 02-01-2019, 08:57 AM
Replies: 36
Views: 2,468
Posted By Carl Froehlich
I know of SkyView/GTN-650 owners who will argue...

I know of SkyView/GTN-650 owners who will argue over proper proceedure. Iíll just share what I do:
- I have configured the SkyView to use the flight plan provided via the GTN-650. I do this because...
Forum: RV-10 01-31-2019, 08:20 PM
Replies: 16
Views: 1,470
Posted By Carl Froehlich
Building my RV-10 I too looked at the cabin heat...

Building my RV-10 I too looked at the cabin heat boxes, specifically the issue you point out. On a hot day they will be dumping hot air out of the heatmuffs right at the mechanical fuel pump.

This...
Forum: Electrical Systems 01-31-2019, 04:54 PM
Replies: 14
Views: 806
Posted By Carl Froehlich
Or - two PC-625s in a thoughtful power...

Or - two PC-625s in a thoughtful power distribution design, and no backup batteries.

Carl
Forum: RV General Discussion/News 01-31-2019, 08:59 AM
Replies: 30
Views: 1,749
Posted By Carl Froehlich
For the GTN-650 and SkyView install, I configure...

For the GTN-650 and SkyView install, I configure so it does not automatically shift from GPS to LOC/ILS. I keep this a manual step on the SkyView (a configuration setting). I donít want the PFD...
Forum: RV-10 01-30-2019, 07:21 PM
Replies: 12
Views: 979
Posted By Carl Froehlich
Closing end ribs

Iíve done this on all three RV projects. It is solely cosmetic.

Carl
Forum: RV-14 01-30-2019, 12:26 PM
Replies: 3
Views: 541
Posted By Carl Froehlich
As I have posted before, I consider the Vanís...

As I have posted before, I consider the Vanís RV-14 wiring harness causes more pain than it is worth. The multiple, big clunky molex connectors are prime example - along with the amazingly fragile...
Forum: RV-10 01-29-2019, 08:54 AM
Replies: 9
Views: 1,113
Posted By Carl Froehlich
Simple solution

Other than the necessity of front seat shoulder belt hangers, I never liked stuff hanging from the overhead.

This is what I did. Simple, cheap, and does the job. This thin wall aluminum tubing...
Forum: Electrical Systems 01-27-2019, 07:48 PM
Replies: 11
Views: 1,086
Posted By Carl Froehlich
A standby alternator, like the B&C vacuum pad...

A standby alternator, like the B&C vacuum pad unit, is on all the time and only has a current output when buss voltage drops below a set level, as would be the case if the primary alternator failed. ...
Forum: RV-8/8A 01-26-2019, 08:41 AM
Replies: 27
Views: 3,530
Posted By Carl Froehlich
VA42

No website. There is a AIRNAV listing: https://www.airnav.com/airport/VA42

PM me if you have any questions.

Carl
Forum: Traditional Aircraft Engines 01-25-2019, 03:37 PM
Replies: 8
Views: 616
Posted By Carl Froehlich
Shawn, The Hall Effect sensor has an seal ring...

Shawn,

The Hall Effect sensor has an seal ring on the rotor shaft to keep accessory case oil from entering the sensor. If memory serves, the LightSpeed manual calls for annual removal of the sensor...
Forum: Traditional Aircraft Engines 01-25-2019, 10:01 AM
Replies: 8
Views: 616
Posted By Carl Froehlich
The short answer - yes, there is something to be...

The short answer - yes, there is something to be gained for running at the appropriate 25 degrees BTDC, especially if you are striving for most efficient LOP cruise.

Perhaps the previous owner was...
Forum: RV-8/8A 01-25-2019, 08:38 AM
Replies: 27
Views: 3,530
Posted By Carl Froehlich
Two homes coming on the market at Dogwood (VA42)....

Two homes coming on the market at Dogwood (VA42). If you have work to do in the area, this is about the only airpark that you can commute to northern VA or DC. I rode the commuter train that is 5...
Forum: RV-8/8A 01-24-2019, 02:41 PM
Replies: 6
Views: 559
Posted By Carl Froehlich
Donít forget to add the channel rubber trim. Carl

Donít forget to add the channel rubber trim.

Carl
Forum: RV-14 01-23-2019, 02:21 PM
Replies: 30
Views: 2,800
Posted By Carl Froehlich
Jon, Good thought process. Please take it a few...

Jon,

Good thought process. Please take it a few steps further and also consider:

- High resistance contacts (in my simple example the battery ground). They work until they don’t - or melt on over...
Forum: RV-14 01-23-2019, 08:27 AM
Replies: 30
Views: 2,800
Posted By Carl Froehlich
It seems Iíve failed to communicate. The battery...

It seems Iíve failed to communicate. The battery is the most reliable element in your electrical system (assuming you have not abused it). It is the other stuff you add to it that adds all the...
Forum: RV-14 01-22-2019, 03:32 PM
Replies: 30
Views: 2,800
Posted By Carl Froehlich
No matter what Garmin says, I would not crank the...

No matter what Garmin says, I would not crank the engine with power to the GTN-650. In my planes I do not crank the engine with any avionics on line.

You decide what you want to do.

Carl
Forum: RV-14 01-22-2019, 02:24 PM
Replies: 10
Views: 1,271
Posted By Carl Froehlich
Some thoughts: -I like the GTN-XXX as high as it...

Some thoughts:
-I like the GTN-XXX as high as it will go. On some installs this translates to dead space about the GTN as there is interference, others not. If there is dead space decide what is...
Forum: COMM 01-22-2019, 01:38 PM
Replies: 25
Views: 1,976
Posted By Carl Froehlich
Please don't put this in your airplane. Some...

Please don't put this in your airplane.

Some thoughts:
- A 'V' or a dipole antenna is already close to 50 ohm impedance. No balun required. Some old school thought is a 1 to 1 balun to transform...
Forum: RV General Discussion/News 01-21-2019, 11:48 AM
Replies: 31
Views: 1,717
Posted By Carl Froehlich
A 48íx48í hangar with a 42í - 44í door will fit...

A 48íx48í hangar with a 42í - 44í door will fit an RV-10 and any two place RV, with room for another RV project (wings off). I do need to move the front plane to the apron to pull out the rear...
Forum: RV-8/8A 01-19-2019, 05:04 PM
Replies: 10
Views: 824
Posted By Carl Froehlich
Donít try. Remove the grip and the wires, cut...

Donít try. Remove the grip and the wires, cut the stick, cut the needed slot in the stick, reinstall.

Look at the Infinity Grip install instructions.

Carl
Forum: RV General Discussion/News 01-18-2019, 08:47 AM
Replies: 41
Views: 4,974
Posted By Carl Froehlich
Possible fix?

So I too got tired of waiting and very disappointed with Allanís failure to honor his promise.

I asked my machinest RV buddy to make a press so that the front spinner can get just enough bend aft to...
Forum: RV General Discussion/News 01-17-2019, 02:40 PM
Replies: 3
Views: 532
Posted By Carl Froehlich
Use the MS20001P extruded hinge with the smaller...

Use the MS20001P extruded hinge with the smaller pin diameter from ACS for the bottom hinges. Hinge width the same as the stock hinge material.

For the top cowl hinge, use the stock hinge 1/8"...
Forum: RV General Discussion/News 01-16-2019, 09:57 AM
Replies: 3
Views: 532
Posted By Carl Froehlich
Just finished this job. What I do: - Top cowl,...

Just finished this job. What I do:
- Top cowl, 1/8Ē hinges per plans but I do not use the smaller pin to make the curve. I take 1/8Ē SS pins and turn down the last few inches to the smaller pin...
Forum: RV-10 01-14-2019, 02:42 PM
Replies: 3
Views: 626
Posted By Carl Froehlich
Sorry but some misleading stuff on this thread. ...

Sorry but some misleading stuff on this thread. I recommend not making a decision on what avionics to buy based on wire harnessses.

Modern EFIS systems are plug and play, no matter what brand you...
Forum: Electrical Systems 01-13-2019, 02:42 PM
Replies: 11
Views: 1,086
Posted By Carl Froehlich
Adding the tiny yellow light is strongly...

Adding the tiny yellow light is strongly recommended. It will be your first indication of an electrical fault. I can think of no reason not to add it and it comes included with the B&C...
Forum: Electrical Systems 01-13-2019, 11:59 AM
Replies: 11
Views: 1,086
Posted By Carl Froehlich
Igor, Some thoughts: - Iím assuming the 17amp-hr...

Igor,

Some thoughts:
- Iím assuming the 17amp-hr battery is something like a PC-680. If so, it is less than marginal for the RV-10. Also remember the RV-10 needs the battery weight aft so no need...
Forum: Electrical Systems 01-11-2019, 03:56 PM
Replies: 20
Views: 1,466
Posted By Carl Froehlich
Ari, Almost impossible to respond to your...

Ari,

Almost impossible to respond to your question without a basic power distribution drawing.

One comment - recommend a design objective that, with no pilot action following any practical single...
Forum: RV-10 01-10-2019, 09:05 AM
Replies: 3
Views: 671
Posted By Carl Froehlich
There are many things you can check and do for...

There are many things you can check and do for RFI issues. Adding aluminum tape as shielding is not one of them.

Happy to discuss over the phone if you like. If so, PM me your contact...
Forum: RV-7/7A 01-08-2019, 10:22 AM
Replies: 20
Views: 1,951
Posted By Carl Froehlich
Dan, No one replied to your post so I’ll dive...

Dan,

No one replied to your post so I’ll dive in. Some thoughts:
- Move the EFIS displays up as high as they will go.
- Move the Dynon radio and Autopilot modules to below the IDF-540, move the...
Forum: RV-14 01-08-2019, 08:34 AM
Replies: 13
Views: 1,426
Posted By Carl Froehlich
Sorry Scott, I have to disagree: - The extra foot...

Sorry Scott, I have to disagree:
- The extra foot or so of wire weight is trivial.
- Old school ground straps run from the firewall to a greasy engine bolt are not weight free, but do create the...
Forum: RV-14 01-07-2019, 07:57 PM
Replies: 13
Views: 1,426
Posted By Carl Froehlich
Remember why you want a good ground on the engine...

Remember why you want a good ground on the engine - to run the starter.

The starter has a very nice ground lug on it. The only engine ground you need is from the ground lug on the firewall to the...
Forum: RV General Discussion/News 01-07-2019, 11:14 AM
Replies: 15
Views: 1,745
Posted By Carl Froehlich
The advent of large EFIS screens and designing...

The advent of large EFIS screens and designing panels that come out as an assembly eliminates the need for access panels.

Build on.

Carl
Forum: RV-10 01-06-2019, 11:35 AM
Replies: 17
Views: 1,074
Posted By Carl Froehlich
Just replace the bottom hinges with the extruded...

Just replace the bottom hinges with the extruded kind - solves the problem. Stock hinges everywhere else - with the option to replace the side hinges with a wider hinge. This way you can offset the...
Forum: RV-14 01-05-2019, 05:04 PM
Replies: 30
Views: 2,800
Posted By Carl Froehlich
Sorry - have to disagree. While you canít...

Sorry - have to disagree. While you canít eliminate all single point failures you need not add to them.

PM me if you want to see another approach.

Carl
Forum: COMM 01-04-2019, 03:04 PM
Replies: 30
Views: 5,965
Posted By Carl Froehlich
This is a problem. Iíve seen workarounds on...

This is a problem. Iíve seen workarounds on Lancair IVs that cut out a section of the carbon fiber and replace with a fiberglass ďwindowĒ to get around this - but most just mount in the tail where...
Forum: RV-14 01-04-2019, 02:59 PM
Replies: 30
Views: 2,800
Posted By Carl Froehlich
A quick review yields some thoughts: - #8 wire...

A quick review yields some thoughts:
- #8 wire from the battery to the master solenoid, and then to the starter motor? These should be #2.
- While you went to great strides to document wiring...
Forum: COMM 01-04-2019, 10:10 AM
Replies: 30
Views: 5,965
Posted By Carl Froehlich
Shoot fire - a lot of churn and some bad...

Shoot fire - a lot of churn and some bad information. Some thoughts:
- A Marker Beacon antenna can be a simple piece of wire strung under the engine and ending in BNC bulkhead connector on the...
Forum: Traditional Aircraft Engines 01-04-2019, 09:08 AM
Replies: 14
Views: 1,052
Posted By Carl Froehlich
Before you dive too far into more plumbing, try...

Before you dive too far into more plumbing, try making the existing heatmuff more efficient. Get a stainless steel pot scrubber and lightly pack it into the heat muff. This will have two effects:
-...
Forum: Glass Cockpit 01-03-2019, 08:50 AM
Replies: 67
Views: 6,331
Posted By Carl Froehlich
A few of thoughts: - Be careful with the low...

A few of thoughts:
- Be careful with the low audio panel and radio mounting. The knobs stick out and you can hit them with your knees when getting in. Moving these to the center would help. ...
Forum: Electrical Systems 01-02-2019, 10:31 AM
Replies: 20
Views: 1,196
Posted By Carl Froehlich
Old school Cessna airframe ground practice works...

Old school Cessna airframe ground practice works well for old school incandescent bulbs, but not for potential RFI sources like MR16 and other LEDs.

You may also want to look at RFI being coupled to...
Forum: Electrical Systems 12-30-2018, 08:43 AM
Replies: 2
Views: 370
Posted By Carl Froehlich
I assume the breaker you are talking about is for...

I assume the breaker you are talking about is for the plane power source - correct?

If so, I agree a breaker in series with a fuseable link makes no sense. For that matter I never use a fuseable...
Forum: RV General Discussion/News 12-26-2018, 05:40 PM
Replies: 18
Views: 1,495
Posted By Carl Froehlich
USAA. Carl

USAA.

Carl
Forum: RV General Discussion/News 12-25-2018, 07:54 PM
Replies: 6
Views: 750
Posted By Carl Froehlich
Exactly - you may end up with a lot of gottchas...

Exactly - you may end up with a lot of gottchas with this approach.

I recommend:
- mount the engine
- fit the cowl
- figure out all the firewall placements being careful to look ahead for such...
Forum: Electrical Systems 12-24-2018, 10:43 AM
Replies: 20
Views: 2,114
Posted By Carl Froehlich
Great opportunity to pull the panel along with...

Great opportunity to pull the panel along with the wiring and just start over. When you do establish some objectives:
- You end up with full documentation of what wire is on what connector. I find...
Forum: RV-10 12-23-2018, 01:03 PM
Replies: 14
Views: 3,721
Posted By Carl Froehlich
Weight? Performance? Cruise fuel burn? There...

Weight? Performance? Cruise fuel burn?

There are a lot of pretty but heavy RV-10s out there. Some want just that, others want efficient cross country. Market as appropriate.

Built in O2 is not...
Forum: RV General Discussion/News 12-22-2018, 02:21 PM
Replies: 18
Views: 1,455
Posted By Carl Froehlich
Never let anyone fill your plane. Some line guys...

Never let anyone fill your plane. Some line guys donít have the patience to fill slow enough. I made this mistake only once - got shorted seven gallons.

Carl
Forum: Electrical Systems 12-22-2018, 09:08 AM
Replies: 3
Views: 397
Posted By Carl Froehlich
Better option, buy the Safety Trim product. Carl

Better option, buy the Safety Trim product.

Carl
Forum: RV General Discussion/News 12-21-2018, 11:15 AM
Replies: 7
Views: 634
Posted By Carl Froehlich
Some thoughts: - The fuel tank flop tube is...

Some thoughts:
- The fuel tank flop tube is useless unless you also install inverted oil system. I put a flop tube on my first RV and then found out I can do a lifetime of aerobatics that do not...
Forum: Fiberglass 12-18-2018, 01:05 PM
Replies: 7
Views: 774
Posted By Carl Froehlich
Just add washers to move the spinner back plate...

Just add washers to move the spinner back plate and front plate forward. The Hartzell manual gives you some option to do this.

You can also add a washer under the engine mounts to move the engine...
Forum: RV-8/8A 12-18-2018, 11:38 AM
Replies: 21
Views: 4,013
Posted By Carl Froehlich
I kept a detailed spreadsheet of actual cost for...

I kept a detailed spreadsheet of actual cost for the RV-10, and am doing the same for the RV-8 project that is almost done.

While there are always options to trim cost, I offer your estimates fall...
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