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Search: Posts Made By: Carl Froehlich
Forum: RV General Discussion/News 04-22-2018, 02:33 PM
Replies: 29
Views: 1,262
Posted By Carl Froehlich
Iíve been flying with Infinity grips for 16 years...

Iíve been flying with Infinity grips for 16 years and installed them on three airplanes. I have never had a switch or wire failure. Some thoughts:
- For side by side planes I have a DPDT toggle...
Forum: Glass Cockpit 04-22-2018, 10:43 AM
Replies: 25
Views: 1,134
Posted By Carl Froehlich
The short answer - yes. As it sounds you are...

The short answer - yes.

As it sounds you are looking for an all up round IFR plane to last you for a long period of time, Iíll share what Iím putting into the RV-8 project (note - Iím biased toward...
Forum: RV General Discussion/News 04-21-2018, 09:04 PM
Replies: 29
Views: 1,262
Posted By Carl Froehlich
From personal experience - do not put the starter...

From personal experience - do not put the starter button on the stick. Did this on the first plane and it was disconnected before the second flight.

Carl
Forum: RV General Discussion/News 04-21-2018, 11:06 AM
Replies: 14
Views: 552
Posted By Carl Froehlich
Correct. Firm and straight pull and they will...

Correct. Firm and straight pull and they will come out.

Carl
Forum: Glass Cockpit 04-21-2018, 10:26 AM
Replies: 31
Views: 1,104
Posted By Carl Froehlich
Thatís what I done for three panels, but I do...

Thatís what I done for three panels, but I do have the round hole cutters that make those holes easy. Of late however not much call for round holes. I cut the square holes with a disk, then finish...
Forum: RV General Discussion/News 04-20-2018, 11:10 AM
Replies: 9
Views: 595
Posted By Carl Froehlich
If you use max baggage weight and fuel fuel, then...

If you use max baggage weight and fuel fuel, then make the pilot and co-pilot big enough to hit the 1800 pounds total, is your CG in spec? If so, this is your answer.

Carl
Forum: Traditional Aircraft Engines 04-17-2018, 08:54 PM
Replies: 13
Views: 1,334
Posted By Carl Froehlich
It sounds like when your cleaned one or more of...

It sounds like when your cleaned one or more of the injectors you lost injector nozzle(s).

Do not fly the plane before pulling the injectors to verify.

Carl
Forum: RV-14 04-17-2018, 08:50 PM
Replies: 6
Views: 515
Posted By Carl Froehlich
Foreflight on an iPad is a wonderful flight...

Foreflight on an iPad is a wonderful flight planning tool. An iPad in the cockpit is little more than the third back up, and something to play with on a long cross country (along with providing the...
Forum: RV-14 04-17-2018, 07:33 AM
Replies: 9
Views: 634
Posted By Carl Froehlich
Exactly correct. Hopefully we donít have a bunch...

Exactly correct. Hopefully we donít have a bunch of people scrapping off paint to comply with guidance that is simply not applicable to our applications.

Carl
Forum: Electronic Ignition Systems 04-17-2018, 07:27 AM
Replies: 11
Views: 802
Posted By Carl Froehlich
Short answer - no. While running, the engine is...

Short answer - no.

While running, the engine is producing heat that needs to be dissipated, the heat will migrate to the pMags via the case, oil, and convection. The pMags will themselves dissipate...
Forum: RV-10 04-16-2018, 07:33 AM
Replies: 24
Views: 2,765
Posted By Carl Froehlich
Six cylinder pMag here at last?

Iíll let you know. I got a note from Brad that a few of us that have been pinging him for years will have our sets shipped this month.

I had superb service from his 4 cylinder pMags for over 800...
Forum: RV-10 04-15-2018, 02:00 PM
Replies: 18
Views: 1,044
Posted By Carl Froehlich
One consideration. I do not install locks on the...

One consideration. I do not install locks on the doors, just the baggage compartment. My thought is that if someone wants to steal the avionics, he will do it one way or another. A door lock might...
Forum: Traditional Aircraft Engines 04-15-2018, 09:21 AM
Replies: 21
Views: 1,934
Posted By Carl Froehlich
Yep - did not address the ďwhat does my engine...

Yep - did not address the ďwhat does my engine monitor doĒ question as I find such indication fun to watch, and once I know what it means it can be helpful to get repeated results, but not much more....
Forum: Traditional Aircraft Engines 04-15-2018, 08:46 AM
Replies: 21
Views: 1,934
Posted By Carl Froehlich
LOP will achieve the most out of each ounce of...

LOP will achieve the most out of each ounce of gas you put in the cylinder, and will lower CHTs. How far you go LOP is at your discretion. If looking strictly for miles per gallon (peak...
Forum: RV-8/8A 04-15-2018, 07:29 AM
Replies: 7
Views: 814
Posted By Carl Froehlich
If you are doing a slow build, get the phenumatic...

If you are doing a slow build, get the phenumatic squeezer. You will soon find it indispensable.

Carl
Forum: RV-10 04-14-2018, 01:33 PM
Replies: 20
Views: 2,376
Posted By Carl Froehlich
I could not agree more. Full envelope flight...

I could not agree more. Full envelope flight testing is frequired when doing such a rigging change. My results:
- RV-8A solo and no baggage (most forward CG condition). Before the shim, elevator...
Forum: RV-10 04-14-2018, 11:46 AM
Replies: 20
Views: 2,376
Posted By Carl Froehlich
There was enough play in the RV-10 empennage...

There was enough play in the RV-10 empennage fairing to not need to redo the fairing. I did replace the fairing on the 8A but as I was going to paint it was painless.

The RV-10 wings are installed...
Forum: RV General Discussion/News 04-14-2018, 09:12 AM
Replies: 15
Views: 2,125
Posted By Carl Froehlich
The RV-10 is, in my opinion, the best kit Vanís...

The RV-10 is, in my opinion, the best kit Vanís has to offer. For odds on updates Iíd guess any would be at the margins. The only big change might be a more streamlined main gear wheel pant that...
Forum: RV-10 04-13-2018, 04:02 PM
Replies: 20
Views: 2,376
Posted By Carl Froehlich
My checks show TAS readout is about right. There...

My checks show TAS readout is about right. There is no magic here. The cowl/plenum setup has less cooling air coming into the engine, so less drag. The plenum uses the cooling air about as...
Forum: RV General Discussion/News 04-13-2018, 07:32 AM
Replies: 4
Views: 832
Posted By Carl Froehlich
Six years between the 8A flying and starting the...

Six years between the 8A flying and starting the 10. Four years between the 10 flying and starting the 8.

Selling the RV-10 was a big mistake. I may have to build another one depending on son and...
Forum: RV-10 04-12-2018, 11:58 AM
Replies: 20
Views: 2,376
Posted By Carl Froehlich
You donít mention the prop you are using. This...

You donít mention the prop you are using. This makes a big impact.

The rigging topic itself is way too wide a subject to adequately respond. The first thing I recommend you do is get other...
Forum: RV-10 04-12-2018, 07:46 AM
Replies: 20
Views: 2,376
Posted By Carl Froehlich
I built using the James Cowl, Plenum and Wheel...

I built using the James Cowl, Plenum and Wheel Pants. This added time to the build but I'm happy with the performance (a couple of screen shots attached). The plane has a stock engine and prop from...
Forum: Electronic Ignition Systems 04-10-2018, 09:07 AM
Replies: 13
Views: 1,282
Posted By Carl Froehlich
Iíll have to disagree. The Lightspeed or the...

Iíll have to disagree. The Lightspeed or the pMag timing will be the dominant condition. The mag is just along for the ride.

The pMag timing can be anything you want it to be. I offer that if...
Forum: COMM 04-10-2018, 08:37 AM
Replies: 16
Views: 1,144
Posted By Carl Froehlich
Can you just mount the ADS-B box in the tailcone...

Can you just mount the ADS-B box in the tailcone near the antenna?

Carl
Forum: RV-10 04-09-2018, 11:10 AM
Replies: 18
Views: 1,044
Posted By Carl Froehlich
I like these round key type locks. Harder to...

I like these round key type locks. Harder to break off a key in them.
https://www.amazon.com/gp/product/B008VH0TAK/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1

Carl
Forum: COMM 04-08-2018, 05:49 PM
Replies: 16
Views: 1,144
Posted By Carl Froehlich
If you use a remoter ADS-B receiver (like is used...

If you use a remoter ADS-B receiver (like is used in the SkyView system) you can mount the receiver and antenna aft near the battery. This moves the ADS-B antenna a good distance from the...
Forum: Electrical Systems 04-08-2018, 11:46 AM
Replies: 15
Views: 1,011
Posted By Carl Froehlich
The problem presents itself if something like...

The problem presents itself if something like your big fat greasy engine ground strap breaks or the engine bolt your are using comes loose. The starter will look for whatever ground path is present,...
Forum: RV-14 04-08-2018, 10:56 AM
Replies: 13
Views: 1,048
Posted By Carl Froehlich
Here is another example of the RV-14 kit making...

Here is another example of the RV-14 kit making decisions for builders that may not be what you want. For example the stick molex plug holder is useless if you decide to use something like the...
Forum: Electrical Systems 04-08-2018, 09:05 AM
Replies: 15
Views: 1,011
Posted By Carl Froehlich
It seems you are fishing for an answer to a...

It seems you are fishing for an answer to a problem or setup that you have not shared with us. What is it?

One side comment. It is factually correct to state current flows from negative to postive...
Forum: Electrical Systems 04-08-2018, 07:25 AM
Replies: 6
Views: 516
Posted By Carl Froehlich
The landing lights you are using are a huge load,...

The landing lights you are using are a huge load, and a lot more inrush current that your listed running current. You are simply exceeding the capacity of the power supply.

Try this - run the power...
Forum: Electrical Systems 04-07-2018, 08:06 PM
Replies: 15
Views: 1,011
Posted By Carl Froehlich
If both supplies are the exact same voltage,...

If both supplies are the exact same voltage, current between them will not flow. In practice however there will always be some voltage difference. The current though the bulb will remain the same....
Forum: Electrical Systems 04-07-2018, 07:15 PM
Replies: 15
Views: 1,011
Posted By Carl Froehlich
Current will flow from higher voltage to lower...

Current will flow from higher voltage to lower voltage. For the light bulb current will flow from the positive side of the bulb to the negative side of the bulb. The amount of current to flow will...
Forum: Electronic Ignition Systems 04-06-2018, 06:32 PM
Replies: 13
Views: 1,282
Posted By Carl Froehlich
I know of an RV-8 running a Lightspeed on one...

I know of an RV-8 running a Lightspeed on one side and a pMag on the other for a few years now. No issues. One of his Lightspeeds died and he replaced it with a pMag.

Carl
Forum: Electrical Systems 04-06-2018, 09:36 AM
Replies: 33
Views: 1,934
Posted By Carl Froehlich
Darin, Some thoughts: - Both batteries available...

Darin,

Some thoughts:
- Both batteries available for engine start? If so, the rear battery need not be as big.
- Donít forget to do a W&B calculation. My guess is you will be nose heavy.
- Overlay...
Forum: Electrical Systems 04-04-2018, 06:43 PM
Replies: 33
Views: 1,934
Posted By Carl Froehlich
I did. Looking at that and your previous...

I did. Looking at that and your previous diagrams I assume the entire engine is running off the one engine buss, is that correct? Is it not possible to have half of the engine on each battery with...
Forum: Electrical Systems 04-04-2018, 11:06 AM
Replies: 33
Views: 1,934
Posted By Carl Froehlich
Dan, There is merit in your position. I offer...

Dan,

There is merit in your position. I offer however that we should not consider every builder/pilot unable to learn and understand how their aircraft systems work. Perhaps I'm too old school. ...
Forum: Electrical Systems 04-04-2018, 07:36 AM
Replies: 33
Views: 1,934
Posted By Carl Froehlich
Exactly correct. Design for continued IFR flight...

Exactly correct. Design for continued IFR flight after a fault with no pilot immediate action.

Carl
Forum: RV General Discussion/News 04-03-2018, 08:26 PM
Replies: 15
Views: 1,017
Posted By Carl Froehlich
This is interesting. I just looked at the...

This is interesting. I just looked at the install manual again and while there are separate pins for power as you discribe, my impression was these are not separate feeds, just smaller wires in...
Forum: Traditional Aircraft Engines 04-02-2018, 07:28 PM
Replies: 12
Views: 917
Posted By Carl Froehlich
What level do you keep oil at? Carl

What level do you keep oil at?

Carl
Forum: Electrical Systems 04-02-2018, 09:13 AM
Replies: 10
Views: 741
Posted By Carl Froehlich
I offer a second alternator mitigates against one...

I offer a second alternator mitigates against one risk only, the loss of the primary alternator. For an electrically dependent engine I do not consider any single battery, two alternator scheme...
Forum: Electrical Systems 04-02-2018, 07:54 AM
Replies: 10
Views: 741
Posted By Carl Froehlich
Look at running power from each battery, via a...

Look at running power from each battery, via a separate 30 amp relay, to half the panel. Have another relay on each battery to be the ďalternatorĒ power for that half of the panel. That way either...
Forum: Electronic Ignition Systems 04-01-2018, 04:42 PM
Replies: 155
Views: 18,267
Posted By Carl Froehlich
Yep - blast tubes are required - as is...

Yep - blast tubes are required - as is installation and operation per the manufacurerís instructions. Install the blast tubes, it only takes a few minutes and fly on. I would never consider going...
Forum: Electrical Systems 04-01-2018, 07:45 AM
Replies: 10
Views: 741
Posted By Carl Froehlich
At first blush my thought is you should look to...

At first blush my thought is you should look to simplify. My guess is you have crossed that magical like between ďenhanced capabilitiesĒ and ďcomplexity induced riskĒ. I clearly understand the...
Forum: Primers 03-31-2018, 07:42 AM
Replies: 7
Views: 715
Posted By Carl Froehlich
QB kits do have a light wash primer from the...

QB kits do have a light wash primer from the factory.

Recently a non-builders ask me if I used Corrosion X. My reply was Corrosion X is only for to correct problems on planes that were not properly...
Forum: RV General Discussion/News 03-27-2018, 01:16 PM
Replies: 6
Views: 577
Posted By Carl Froehlich
Your low voltage alarm (if set to something...

Your low voltage alarm (if set to something reasonable like 13 vdc) will tell you within a couple of seconds if your alternator fails. I no longer install current shunts. I find voltage to be the...
Forum: RV General Discussion/News 03-26-2018, 11:51 AM
Replies: 9
Views: 798
Posted By Carl Froehlich
Donít give up on the hinge pin approach. It is...

Donít give up on the hinge pin approach. It is dirt simple and looks good. There are a few things to try if not done already:
- If you are having a problem with the hinge eyes ďzippingĒ together,...
Forum: Electrical Systems 03-26-2018, 11:28 AM
Replies: 12
Views: 1,033
Posted By Carl Froehlich
Soldering is a basic skill all builders need to...

Soldering is a basic skill all builders need to learn, just like bucking rivets.

Simple soldering iron and shrink tube for butt jounts makes this a 20 second operation - and a boatload cheaper than...
Forum: RV General Discussion/News 03-25-2018, 09:56 PM
Replies: 15
Views: 1,160
Posted By Carl Froehlich
The outboard side of the antenna just rests...

The outboard side of the antenna just rests against the inside, outboard edge of the wingtip.

Running strobe and nav light wires on the angle edge of the antenna is not only unnecessary, it is not...
Forum: RV General Discussion/News 03-25-2018, 09:32 PM
Replies: 16
Views: 1,000
Posted By Carl Froehlich
Lacquer thinner. It will also take off several...

Lacquer thinner. It will also take off several layers of skin - so fair warning.

Carl
Forum: Glass Cockpit 03-25-2018, 08:21 PM
Replies: 18
Views: 1,342
Posted By Carl Froehlich
Are you saying the G3X autopilot failed?? If so,...

Are you saying the G3X autopilot failed?? If so, this violates my ďreliable two axis autopilot for IFR flightĒ requirement.

Carl
Forum: RV General Discussion/News 03-25-2018, 01:33 PM
Replies: 24
Views: 1,889
Posted By Carl Froehlich
Not really needed with standard EFIS installs. ...

Not really needed with standard EFIS installs. Pull the EFIS display and you have a lot of access. Put a few connectors on the rest of the panel and just pull it when needed. I can have the whole...
Forum: RV General Discussion/News 03-25-2018, 12:29 PM
Replies: 19
Views: 1,297
Posted By Carl Froehlich
Three airplanes and I keep the flush rivet sets...

Three airplanes and I keep the flush rivet sets polished. I would not consider scratching them up.

For bucked rivets I run the bucking bar face on the stochbrite wheel (the rest of the bucking bar...
Forum: Glass Cockpit 03-25-2018, 11:47 AM
Replies: 18
Views: 1,342
Posted By Carl Froehlich
The GTN-650 or 750 arrival/departure proceedures...

The GTN-650 or 750 arrival/departure proceedures work well. Pick the one you want, select the transition and enter. The track shows up on the EFIS so you can follow the little magenta line. The...
Forum: Glass Cockpit 03-25-2018, 10:07 AM
Replies: 17
Views: 3,609
Posted By Carl Froehlich
Quality RG-58 coax (think Belden) actually has...

Quality RG-58 coax (think Belden) actually has slightly less loss per foot than RG-400. I used RG-58 in my first plane and all is well after 18 years.

I now use RG-400 in my builds as it is more...
Forum: RV General Discussion/News 03-25-2018, 09:56 AM
Replies: 15
Views: 1,160
Posted By Carl Froehlich
A scrap piece of fiberglass works fine as well. ...

A scrap piece of fiberglass works fine as well. If not thick enough, stack a couple together. You can adjust the gamma match by making this dialecgric thicher (less capacitance) or thinner (more...
Forum: RV-8/8A 03-23-2018, 04:59 PM
Replies: 2
Views: 577
Posted By Carl Froehlich
I just worked the W&B numbers. For an RV-8/8A...

I just worked the W&B numbers. For an RV-8/8A with the 180hp IO-360 and Hartzell CS prop, one PC-625 battery mounted forward, and one PC-625 in the normal aft position yields a nice W&B. This is...
Forum: RV-7/7A 03-22-2018, 11:26 AM
Replies: 16
Views: 721
Posted By Carl Froehlich
I would not attempt to fit a cowl without the...

I would not attempt to fit a cowl without the engine and prop (or prop hub) mounted, period. Your engine, not a mock up and using they engine mounts you will fly with.

Just like avionics, at some...
Forum: RV-7/7A 03-21-2018, 08:55 PM
Replies: 16
Views: 721
Posted By Carl Froehlich
The stock Vanís spinner or the Cummins spinner...

The stock Vanís spinner or the Cummins spinner makes no difference. Both spinners fit based on the same Vanís back plate.

Do not fit the cowl until after you have decide on a prop extension, and...
Forum: Electrical Systems 03-21-2018, 07:07 PM
Replies: 20
Views: 1,384
Posted By Carl Froehlich
Battery chargers typically are not filtered. For...

Battery chargers typically are not filtered. For pumping current into a battery it makes little difference. For electronics it does. This means that you should not run the panel on the battery if...
Forum: RV-10 03-21-2018, 05:07 PM
Replies: 10
Views: 1,056
Posted By Carl Froehlich
Short answer - yes. As Iíve posted before,...

Short answer - yes.

As Iíve posted before, fitting wingtips should be deferred until after the wings are on the plane, flaps and ailerons rigged (and rigging checked by serveral sets of eyes). The...
Forum: Electrical Systems 03-21-2018, 04:32 PM
Replies: 20
Views: 1,384
Posted By Carl Froehlich
Real power supplies are not expensive. Here is...

Real power supplies are not expensive. Here is one of many examples:...
Forum: RV General Discussion/News 03-21-2018, 10:22 AM
Replies: 52
Views: 5,724
Posted By Carl Froehlich
Of late Iíve been replacing 4í two tube...

Of late Iíve been replacing 4í two tube fluorescent shop lights with simple 60 watt equivent LED bulbs (4 for $5 at Walmart). I get the light bulb fixtures from Amazon for $1.30 each. I mount four...
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