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Search: Posts Made By: plehrke
Forum: RV-9/9A Today, 04:21 AM
Replies: 34
Views: 1,591
Posted By plehrke
It all starts with what are the loads on the...

It all starts with what are the loads on the aircraft and then how are those loads distributed throughout the airframe. In my 37 years of aircraft design, loads can be one of the most debated things...
Forum: RV-9/9A Yesterday, 12:04 PM
Replies: 34
Views: 1,591
Posted By plehrke
Terry is correct but one other thing to be aware...

Terry is correct but one other thing to be aware of is that in aviation at limit load (no safety factor), the structure is allowed to deform permanently, it just cannot fail. Therefore if you exceed...
Forum: RV-14 09-20-2022, 12:14 PM
Replies: 19
Views: 1,297
Posted By plehrke
Has anybody looked at difference in hole...

Has anybody looked at difference in hole roundness between air and chordless? I would think the lower rpm of chordless could potential cause non-round holes. Maybe not too big deal on rivets but for...
Forum: RV General Discussion/News 09-20-2022, 04:46 AM
Replies: 19
Views: 1,632
Posted By plehrke
Call a broker. You will get way better and...

Call a broker. You will get way better and specific information to your situation from them then you will get here on the forum. I highly recommend Arthur Gallagher and talk to Leah.
Forum: RV-14 09-20-2022, 04:38 AM
Replies: 19
Views: 1,297
Posted By plehrke
With kits changing so may the tools. Back when I...

With kits changing so may the tools. Back when I built my 6A before prepunched holes and early, slow, short battery life chordless drills it was a no brainer to use air drill.
I love my air drill...
Forum: RV Building Tips/Techniques 09-16-2022, 04:59 AM
Replies: 10
Views: 949
Posted By plehrke
Not as good as riveted. The major aircraft...

Not as good as riveted. The major aircraft manufacturer I worked for didn't allow using them on production aircraft for that reason.
Forum: RV General Discussion/News 09-13-2022, 04:02 AM
Replies: 44
Views: 3,515
Posted By plehrke
I have a 1” hole with a metal snap plug. The hole...

I have a 1” hole with a metal snap plug. The hole was originally 3/4” and I spent sometimes 20-30 minutes getting hole and valve stem lined up and valve cap removed through that little hole. It would...
Forum: RV-6/6A 09-12-2022, 10:08 AM
Replies: 29
Views: 1,731
Posted By plehrke
Do forum search and you should get quite a few...

Do forum search and you should get quite a few hits.
Forum: RV General Discussion/News 09-11-2022, 07:58 AM
Replies: 44
Views: 3,515
Posted By plehrke
Caps keep dirt and brake dust out of the stem...

Caps keep dirt and brake dust out of the stem opening. That dirt is pushed into the valve when putting air in. There is potential for that dirt to hold the value open causing a value stem leak.
Forum: RV Ongoing Maintenance Issues 09-10-2022, 06:34 PM
Replies: 47
Views: 6,673
Posted By plehrke
My order for tempest AA48109 has just shipped...

My order for tempest AA48109 has just shipped according to email from Aircraft Spruce plus I have a charge to my credit card. I ordered them on august 5 and told then that they would ship on Sept 12....
Forum: RV General Discussion/News 09-09-2022, 12:45 PM
Replies: 60
Views: 5,939
Posted By plehrke
I believe trailblazing is very cyclical. It...

I believe trailblazing is very cyclical. It starts with people in their garage (in aviation that is us), moves to small entrepreneurs selling to people in their garage, then [maybe] catches on with...
Forum: RV General Discussion/News 09-08-2022, 07:40 AM
Replies: 60
Views: 5,939
Posted By plehrke
Did you watch the AvWeb’s Paul Bertorelli...

Did you watch the AvWeb’s Paul Bertorelli interview of Paul Millner? (https://www.avweb.com/multimedia/paul-millner-on-avgas-market-realities/)
Forum: RV General Discussion/News 09-08-2022, 04:53 AM
Replies: 60
Views: 5,939
Posted By plehrke
According to an interview that AvWeb’s Paul...

According to an interview that AvWeb’s Paul Bertorelli (https://www.avweb.com/multimedia/paul-millner-on-avgas-market-realities/) did with a guy in the avgas industry, refineries make good profit...
Forum: RV General Discussion/News 09-06-2022, 06:32 PM
Replies: 60
Views: 5,939
Posted By plehrke
It will be like ADSB, 406mz ELTs, etc were very...

It will be like ADSB, 406mz ELTs, etc were very few make switch (spend money) until they absolutely have to either by previous option goes away or they mandate all must make change. And even then it...
Forum: RV Ongoing Maintenance Issues 09-06-2022, 02:14 PM
Replies: 10
Views: 1,281
Posted By plehrke
4 years old since you put it on or 4 years since...

4 years old since you put it on or 4 years since you bought it? Tires sitting around can dry out even if not in use. Goodyear says auto tires can crack from dry rot in 5-6 years greatly depends on...
Forum: Traditional Aircraft Engines 09-04-2022, 05:31 AM
Replies: 12
Views: 1,070
Posted By plehrke
I am sure Lycoming will be as quick to embrace...

I am sure Lycoming will be as quick to embrace and approve changes in engine operations and maintenance as they have been in the past.

My guess is that if current published procedures do not hurt...
Forum: Alternative Engines 09-04-2022, 04:08 AM
Replies: 95
Views: 18,180
Posted By plehrke
It seems at my airport there are quite a few Cubs...

It seems at my airport there are quite a few Cubs and Cub clones that just fly the pattern as well as a Cherokee 140 that never gets more than a couple miles from the airport. These are flown mostly...
Forum: RV Building Tips/Techniques 09-03-2022, 03:41 AM
Replies: 9
Views: 640
Posted By plehrke
The term torque seal is really a misnomer. Better...

The term torque seal is really a misnomer. Better term is slippage indicator. And like any warning light, it is not a 100% guarantee that no slippage has occurred.
Forum: RV-8/8A 09-02-2022, 06:07 AM
Replies: 20
Views: 1,434
Posted By plehrke
I believe the FAA requires some flight testing to...

I believe the FAA requires some flight testing to be done after mounting anything external to the airplane including cameras. You never know the effect you may get.
Forum: RV Building Tips/Techniques 09-01-2022, 05:16 AM
Replies: 21
Views: 1,810
Posted By plehrke
I did the same. 17 years later and over 1000...

I did the same. 17 years later and over 1000 flying hours and my baffle still looks great with only the alodine and no primer or paint.
Forum: Traditional Aircraft Engines 08-30-2022, 04:33 AM
Replies: 4
Views: 668
Posted By plehrke
I have the Air Wolf AFC- K001 fire wall mounted...

I have the Air Wolf AFC- K001 fire wall mounted remote oil filter. It has about 0.5” clearance to the firewall. I have hose clamped a piece of rubber hose to the lower body of my xx109 filter filling...
Forum: The RV Grin 08-28-2022, 03:59 AM
Replies: 6
Views: 919
Posted By plehrke
Great on the perseverance to get it done. Fly...

Great on the perseverance to get it done. Fly safe and Enjoy!
Forum: Traditional Aircraft Engines 08-27-2022, 04:53 AM
Replies: 21
Views: 1,605
Posted By plehrke
Dan, thanks. As usual, you provide help info....

Dan, thanks. As usual, you provide help info.
Now the hard question. For aircraft (Lycoming) use, what beta rating would you recommend should we be using as a maximum?
Forum: Safety 08-25-2022, 05:41 AM
Replies: 252
Views: 30,791
Posted By plehrke
Fair question in the experiment world but as...

Fair question in the experiment world but as stated before several times in this thread just be aware you are now a test pilot. And for sure you need to go back to phase 1.
Forum: RV-14 08-23-2022, 07:40 PM
Replies: 13
Views: 1,850
Posted By plehrke
I would think getting an unpainted steel part...

I would think getting an unpainted steel part with a little corrosion on it would be common. That part may have left vans perfectly clean. I can bead blast and clean a steel part and it will have a...
Forum: RV-12/RV-12iS 08-21-2022, 06:31 PM
Replies: 7
Views: 900
Posted By plehrke
What was the temperature when you weighed the...

What was the temperature when you weighed the fuel?
Fuel density changes quite a bit depending on temperature. This is very apparent if you top off your tanks and then leave it out in the sun. ...
Forum: Northwest 08-21-2022, 06:36 AM
Replies: 22
Views: 2,934
Posted By plehrke
Not going to deviate a bit north to fly...

Not going to deviate a bit north to fly past/around Denali? I did not fly my RV past it but did take a tour plane up to Denali and it was definitely a highlight. Just RV note is the pilot who took us...
Forum: RV-7/7A 08-19-2022, 05:55 AM
Replies: 10
Views: 1,010
Posted By plehrke
I had similar. Vans amp meter maxed out whenever...

I had similar. Vans amp meter maxed out whenever I had PTT depressed. Mine was due to the ammeter wire running along the PTT wire for a short section. I re-located the wires and all fine.
Forum: RV General Discussion/News 08-19-2022, 04:14 AM
Replies: 30
Views: 2,010
Posted By plehrke
Completely agree since most of the ones on Amazon...

Completely agree since most of the ones on Amazon are Chinese and I have found that <90% provide reliable results. Some considerable less. For Something I am using as a safety check needs better...
Forum: Safety 08-18-2022, 10:40 AM
Replies: 252
Views: 30,791
Posted By plehrke
More likely to have bad things happen with "stick...

More likely to have bad things happen with "stick free" (in this case rudder pedals free) than with "stick fixed". Control cables/tubes provide another constraint when held with control pressure.
Forum: Safety 08-18-2022, 04:06 AM
Replies: 252
Views: 30,791
Posted By plehrke
I don’t think adding a new untested rudders into...

I don’t think adding a new untested rudders into the mix without it going through Vans engineering would satisfy my worries if I had a -7. Changing stiffness and mass will change the aeroelastic axis...
Forum: Safety 08-17-2022, 05:50 AM
Replies: 252
Views: 30,791
Posted By plehrke
Remember that folded rudders also tend to have a...

Remember that folded rudders also tend to have a dab of RTV or proseal at the end of each stiffener to help prevent skin cracking. That will tie skin and stiffeners all together making a much more...
Forum: Trip Write-ups 08-15-2022, 04:25 AM
Replies: 48
Views: 5,331
Posted By plehrke
Camera power

Very cool, pun included, flying.
How does one keep multiple cameras powered for long flights? Do you have them wired to aircraft power? During long flights do you turn on the camera with wifi...
Forum: RV-10 08-14-2022, 05:11 AM
Replies: 70
Views: 11,587
Posted By plehrke
Vans Definitely has the best engineered airplane...

Vans Definitely has the best engineered airplane kits in the Experimental amateur built market and definitely very conscientious of the safety of their products. Since it Experimental aviation the...
Forum: Engine Monitors 08-12-2022, 12:56 PM
Replies: 2
Views: 413
Posted By plehrke
Thanks. Worked great with the downloaded driver.

Thanks. Worked great with the downloaded driver.
Forum: RV General Discussion/News 08-07-2022, 09:55 AM
Replies: 53
Views: 9,247
Posted By plehrke
Turning base to final for 27 I was told to “turn...

Turning base to final for 27 I was told to “turn left heading south”. Boy, was I thinking quickly what the issues were heading into 18/36 traffic. No sooner did I have full power and flaps retracting...
Forum: RV General Discussion/News 08-05-2022, 05:01 PM
Replies: 53
Views: 9,247
Posted By plehrke
Completely agree. Two separate years, upon see...

Completely agree. Two separate years, upon see what was happen on the Fisk arrival, I did not hesitate to divert to Appleton. No different than making weather divert decisions, know your limitations...
Forum: Safety 08-05-2022, 05:47 AM
Replies: 92
Views: 13,307
Posted By plehrke
What a nightmare if the volunteer ground crew had...

What a nightmare if the volunteer ground crew had even A few airplanes untied down still trying to relocate when the storm hits.
Forum: Safety 08-05-2022, 04:45 AM
Replies: 92
Views: 13,307
Posted By plehrke
Very good discussion here on gust locks that...

Very good discussion here on gust locks that worked, didn’t work, and proposed for the future. One thing to remember that the winds vary quite a bit around the parking areas in speed and direction...
Forum: Engine Monitors 08-04-2022, 10:40 AM
Replies: 2
Views: 413
Posted By plehrke
JPI Serial Port Interface

What are others using for connection to download data onto their laptop into EZTrend? I have not done it in years but now realize my laptop no longer has a 9 pin serial port that the connector...
Forum: Alternative Engines 08-02-2022, 11:11 AM
Replies: 29
Views: 4,018
Posted By plehrke
It’s the only way that begets changes and...

It’s the only way that begets changes and improvements. Every industry has these risk takers and in general aviation it is concentrated in EAA.
Godspeed TurbAero, I’ll be watching.
Forum: RV General Discussion/News 08-02-2022, 06:37 AM
Replies: 12
Views: 1,843
Posted By plehrke
Listening in to Fisk control on Wednesday or...

Listening in to Fisk control on Wednesday or Thursday morning, he was telling traffic if they could not maintain 90kts to side step the railroad tracks to the right and let “the train” pass. He would...
Forum: RV-14 07-31-2022, 06:59 AM
Replies: 3
Views: 774
Posted By plehrke
Sounds like you have a good mindset. My only...

Sounds like you have a good mindset. My only difference was, because of your first statement, I did not have the end goal time frame. because it is a long journey, one step at a time, the goal I set...
Forum: RV General Discussion/News 07-31-2022, 04:51 AM
Replies: 5
Views: 1,343
Posted By plehrke
How many RVs at OSH 2022?

With it being the 50th anniversary of Vans, maybe set a record in number of RVs attending Oshkosh. Anybody know the tally of RVs that flew in this year? Did it set a record?
Wonder what the total...
Forum: RV-15 07-28-2022, 03:45 AM
Replies: 457
Views: 101,650
Posted By plehrke
The non-reoccurring cost of changing the...

The non-reoccurring cost of changing the production process is cheap compared to the reoccurring cost of countersinking several sheets of aluminum on ever production aircraft.
The reason GA aircraft...
Forum: RV-6/6A 07-20-2022, 09:01 AM
Replies: 10
Views: 1,344
Posted By plehrke
data for my RV-6A can be found...

data for my RV-6A can be found here
https://vansairforce.net/community/showthread.php?t=71444
Forum: Midwest 07-19-2022, 06:56 AM
Replies: 21
Views: 3,179
Posted By plehrke
I never have liked these reporting points are...

I never have liked these reporting points are provided on the GPS. Makes lots of people looking at their screen vs looking outside 100% of the time. It is a VFR approach. Maybe it does keep a few...
Forum: Traditional Aircraft Engines 07-18-2022, 03:57 PM
Replies: 74
Views: 5,986
Posted By plehrke
Completely agree.

Completely agree.
Forum: Traditional Aircraft Engines 07-17-2022, 05:24 AM
Replies: 74
Views: 5,986
Posted By plehrke
Agree that part of the “cost of ownership” is...

Agree that part of the “cost of ownership” is running your engine to minimize the maintenance cost and maximize engine life (TBO). Probably a small factor but engine maintenance is based on dollars...
Forum: Traditional Aircraft Engines 07-17-2022, 05:01 AM
Replies: 74
Views: 5,986
Posted By plehrke
Altitude should be chosen based on winds aloft....

Altitude should be chosen based on winds aloft. Make sure you don’t fly a particular altitude to get the small additional advantage of flying Carson speed and loose the much larger benefit of more...
Forum: RV-15 07-11-2022, 08:10 AM
Replies: 457
Views: 101,650
Posted By plehrke
Very interesting discussion. As a...

Very interesting discussion. As a configurator/designer of [fighter] aircraft for 37 years I constantly heard complaints and compliments on every aircraft I drew. Pretty much the same here about the...
Forum: Tools 07-07-2022, 04:41 PM
Replies: 13
Views: 2,312
Posted By plehrke
Agree. I have JIS screwdrivers and bits in...

Agree.
I have JIS screwdrivers and bits in multiple sizes. They work great on all the Phillips heads on the RV.
Forum: RV-7/7A 07-05-2022, 04:35 AM
Replies: 30
Views: 11,123
Posted By plehrke
Congratulations! Start of a whole new chapter in...

Congratulations! Start of a whole new chapter in The RV world.
Forum: Tools 07-01-2022, 03:44 AM
Replies: 11
Views: 1,043
Posted By plehrke
I have had my MD Smart Tool level since I started...

I have had my MD Smart Tool level since I started my build 20+ years ago and can not recall ever replacing the battery. I still use it at least every Condition Inspection to check mag timing.
Forum: RV-14 06-28-2022, 08:26 PM
Replies: 29
Views: 2,381
Posted By plehrke
My 6A, Exactly the same.

My 6A, Exactly the same.
Forum: Alternative Engines 06-16-2022, 06:56 AM
Replies: 42
Views: 5,834
Posted By plehrke
Why has Continental not been a player in the RV...

Why has Continental not been a player in the RV world?

Would Lycoming ever look into what business case would warrant putting a brand new design in development? Maybe due to push for electric...
Forum: RV-12/RV-12iS 06-11-2022, 08:52 AM
Replies: 8
Views: 1,238
Posted By plehrke
I like to have any safety alert to have minimal...

I like to have any safety alert to have minimal threads that would cause failure to alert me of issue. Therefore I want my CO alert system to be stand alone and not dependent on my EFIS functioning...
Forum: RV General Discussion/News 06-11-2022, 07:26 AM
Replies: 38
Views: 4,734
Posted By plehrke
Check everything in the flap retraction system....

Check everything in the flap retraction system. Actuators, Push rods, weldments, bearings, bolts. Look for anything that looks bent and any type of freeplay. Your vibration could be the flap flapping...
Forum: RV General Discussion/News 06-05-2022, 10:04 AM
Replies: 13
Views: 2,025
Posted By plehrke
I installed two fans, left and right. Use them...

I installed two fans, left and right. Use them even in summer to pull air from behind panel for avionics cooling, not that is really needed.
Forum: RV Building Tips/Techniques 06-02-2022, 04:27 AM
Replies: 6
Views: 883
Posted By plehrke
You can always use trigonometry with a bubble...

You can always use trigonometry with a bubble level. If your bubble level is 2 ft long then 10 degrees is sin(10 deg)x24”=4.168” or 4 5/32 inches deflection at end of 24” level.
Forum: RV Building Tips/Techniques 05-27-2022, 08:07 AM
Replies: 14
Views: 2,013
Posted By plehrke
Good info. I can see adjustment as described by...

Good info. I can see adjustment as described by shaving a bit on nut face to get to fit tight, but loose, initially.
I Don’t know where the wear would come from as only relative motion should be in...
Forum: RV General Discussion/News 05-23-2022, 03:42 AM
Replies: 30
Views: 4,499
Posted By plehrke
No need to beat them into submission as they are...

No need to beat them into submission as they are pretty well adapted to go the way of least resistance. Really the electrons are beating you into submission to go the way you want them to go. :) ...
Forum: RV General Discussion/News 05-21-2022, 06:50 AM
Replies: 35
Views: 6,980
Posted By plehrke
I think that is the very definition of...

I think that is the very definition of Experimental- Amateur Built.
Forum: RV General Discussion/News 05-21-2022, 04:17 AM
Replies: 46
Views: 6,216
Posted By plehrke
A good place to interject that is why aircraft...

A good place to interject that is why aircraft have some designed in margin. If you build/fly into the margins by cutting holes in bad places, flying over gross weight or outside CG limits you are...
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