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Search: Posts Made By: plehrke
Forum: VAF Classifieds (posts in here deleted after 30 days) 05-03-2021, 02:39 PM
Replies: 2
Views: 278
Posted By plehrke
Not heard much of Mar Hyde recently but it was...

Not heard much of Mar Hyde recently but it was the rattle can self etching primer of early RV days 1980s and 90s, at least here in the Midwest. After 20 years my Mar Hyde is still bulletproof. Even...
Forum: RV-9/9A 05-02-2021, 06:20 AM
Replies: 5
Views: 333
Posted By plehrke
It may not be carb ice. Maybe you are getting...

It may not be carb ice. Maybe you are getting some throttle linkage binding that only happens in flight. The throttle linkages can move a bit during flight conditions since the mounting bracket can...
Forum: Alternative Engines 04-26-2021, 06:14 PM
Replies: 34
Views: 3,534
Posted By plehrke
Sounds interesting and puts the Experimental into...

Sounds interesting and puts the Experimental into amateur built. What you are missing is it will not be an RV7 when done. At a minimum the wing, tail surfaces, and all the controls surfaces will need...
Forum: RV-8/8A 04-19-2021, 05:45 PM
Replies: 9
Views: 376
Posted By plehrke
Agree with Kevin. In my day job I have created...

Agree with Kevin. In my day job I have created thousands of pieces of geometry using NX that were run in various CFD tools. We continue to evaluate many of the commercially available CFD software...
Forum: Places To Fly...Things to See...Things to Eat 04-18-2021, 09:07 AM
Replies: 15
Views: 9,859
Posted By plehrke
Over the top.

Over the top.
Forum: RV-12/RV-12iS 04-04-2021, 07:20 AM
Replies: 22
Views: 2,758
Posted By plehrke
I painted interior after completed all riveting...

I painted interior after completed all riveting to cover everything with common color coat. I did this as I decided I was going light with no interior except seats. This added several months to my...
Forum: Traditional Aircraft Engines 04-04-2021, 04:26 AM
Replies: 44
Views: 4,065
Posted By plehrke
1) if you donít replace the filter you retain old...

1) if you donít replace the filter you retain old oil left in filter. putting 6-7 quarts of fresh oil that mixes with the ~1 quart of dirty oil in the filter seems like wasting fresh oil. Before...
Forum: Electrical Systems 04-02-2021, 05:06 PM
Replies: 3
Views: 401
Posted By plehrke
I have the Show Planes flap positioned system and...

I have the Show Planes flap positioned system and that is how it works. Push momentary down and get each successive flap position each time you tap the momentary down. Hit up and flaps travel all the...
Forum: RV General Discussion/News 03-28-2021, 04:18 AM
Replies: 11
Views: 1,354
Posted By plehrke
Agree. Water will get in so drains are important...

Agree. Water will get in so drains are important not just in fuselage.



One year at OSH a storm came through. (or is that every year). It was first year I had my RV there. Worried about water in...
Forum: RV General Discussion/News 03-21-2021, 04:38 PM
Replies: 12
Views: 1,659
Posted By plehrke
Look behind your workbench. I usually am able to...

Look behind your workbench. I usually am able to score an additional handful from there when needed.
Forum: RV General Discussion/News 03-17-2021, 03:25 PM
Replies: 14
Views: 1,684
Posted By plehrke
Wow. I did not see that coming.

Wow. I did not see that coming.
Forum: Traditional Aircraft Engines 03-17-2021, 03:15 PM
Replies: 22
Views: 1,896
Posted By plehrke
You can’t believe everything that you read on the...

You can’t believe everything that you read on the Internet or in a YouTube video.
Forum: RV Ongoing Maintenance Issues 03-17-2021, 03:06 PM
Replies: 9
Views: 1,203
Posted By plehrke
I did not think the RV-7 kits ever had come with...

I did not think the RV-7 kits ever had come with 0.016 skins on the rudder.
Forum: Glass Cockpit 03-08-2021, 03:32 PM
Replies: 59
Views: 15,043
Posted By plehrke
Neither is the Hudly.

Neither is the Hudly.
Forum: Tools 02-24-2021, 03:31 PM
Replies: 23
Views: 2,074
Posted By plehrke
The key attribute is focal length. You need one...

The key attribute is focal length. You need one that has a very short one. Resolution is irrelevant if it wonít focus On stuff close to lense. I have had cheap ones that provide great picture...
Forum: RV General Discussion/News 02-21-2021, 04:40 PM
Replies: 17
Views: 1,847
Posted By plehrke
Barge Surveillance

Flew up and down our frozen rivers checking out the barge traffic making their way through the icy waters. This is the Illinois River right at its confluence with the mighty Mississippi
Forum: RV General Discussion/News 02-20-2021, 03:59 AM
Replies: 20
Views: 1,896
Posted By plehrke
Being an aircraft designer myself, with several...

Being an aircraft designer myself, with several aircraft I have worked that have pushed the envelope to areas we have never gone, this is interesting stuff as I don’t know what I would do if I could...
Forum: RV General Discussion/News 02-03-2021, 04:18 PM
Replies: 23
Views: 1,767
Posted By plehrke
My plan was always to finish on a Friday. That...

My plan was always to finish on a Friday. That was as detailed as I got. Anyone (and everyone that sees you building will) asks when I was going to be done I said “on a Friday”. I actually succeeded...
Forum: RV General Discussion/News 01-31-2021, 06:17 AM
Replies: 137
Views: 34,797
Posted By plehrke
What about twin jets

It would be good if someone designed a larger fan version of the jet engines that the Sonex is using. Bigger fan could get the engine to a reasonable SFC. Then put two of those on the aft fuselage of...
Forum: RV Building Tips/Techniques 01-31-2021, 04:57 AM
Replies: 35
Views: 5,139
Posted By plehrke
I did very similar. Made all panel text in a...

I did very similar. Made all panel text in a PowerPoint and sent to local print shop to print on dry transfer sheets. Print shop provided burnishing tool. Covered with clear (with a touch of...
Forum: RV-7/7A 01-18-2021, 12:04 PM
Replies: 21
Views: 2,465
Posted By plehrke
MS35206 Pan Head Phillips Machine Screws + Tyton...

MS35206 Pan Head Phillips Machine Screws + Tyton Cable Tie Anchor Mounts (https://www.aircraftspruce.com/catalog/elpages/hellermann_tieanchor.php)
I guess I am influenced by my day job where...
Forum: Painting your RV 01-17-2021, 07:26 AM
Replies: 20
Views: 2,899
Posted By plehrke
Paint the gear and wheel pants a solid light...

Paint the gear and wheel pants a solid light single color the same color as the bottom of the fuselage, also a single color. Paint the lower surface of the wings and tails a darker color so they...
Forum: RV-8/8A 01-17-2021, 07:20 AM
Replies: 11
Views: 1,732
Posted By plehrke
Not a big fiberglass fan but I did learn that if...

Not a big fiberglass fan but I did learn that if you don't like the shape, cut it back and put in a filler piece. Fiberglass bounds to itself pretty good.
Trying to force cured fiberglass into a...
Forum: RV General Discussion/News 01-09-2021, 04:44 AM
Replies: 26
Views: 2,735
Posted By plehrke
I my opinion you need to make sure your decision...

I my opinion you need to make sure your decision to build or buy should not only think about can you do the structural kit from Vans But also should include thinking about your skill level for the...
Forum: RV General Discussion/News 01-02-2021, 07:01 PM
Replies: 32
Views: 4,702
Posted By plehrke
Just think how cool it would be with open...

Just think how cool it would be with open architecture so you can run Foreflight right on you EFIS or run your EFIS on your iPad. Or maybe better yet, buy Garminís EFIS software and run it on your...
Forum: RV General Discussion/News 01-02-2021, 06:54 PM
Replies: 32
Views: 4,702
Posted By plehrke
In my opinion, not missing a thing. Same path for...

In my opinion, not missing a thing.
Same path for me.
Same thoughts.
I hope to catch up when the open architecture (hardware and software) revolution finally hits and glass is replaced by a HUD, or...
Forum: RV Building Tips/Techniques 12-30-2020, 05:56 AM
Replies: 12
Views: 2,060
Posted By plehrke
Probably work ok for normal riveting. I have...

Probably work ok for normal riveting. I have always thought, and only used, tape to hold in rivets when back riveting on stiffeners. For back riveting I would not want that sponginess as the head...
Forum: Traditional Aircraft Engines 12-28-2020, 02:48 PM
Replies: 4
Views: 1,000
Posted By plehrke
What does it look like? I canít visualize it...

What does it look like? I canít visualize it from your description. Can you post the pictures?
How much higher temperature did your cylinder 3 have? Are there a different ďbump outsĒ sizes for...
Forum: RV Ongoing Maintenance Issues 12-27-2020, 07:02 AM
Replies: 29
Views: 6,052
Posted By plehrke
. . . . .and they are usually by people who have...

. . . . .and they are usually by people who have no financial risk by relaying their opinion.
Forum: RV-7/7A 12-26-2020, 05:40 PM
Replies: 10
Views: 1,691
Posted By plehrke
This is why you should never ever scale anything...

This is why you should never ever scale anything off a drawing. First thing I learned on my job at the big aerospace company after graduating with my brand new engineering degree 36 years ago....
Forum: RV General Discussion/News 12-25-2020, 07:00 PM
Replies: 34
Views: 3,592
Posted By plehrke
I donít think this kind of response is what the...

I donít think this kind of response is what the original poster is looking for. In fact I clipped below in his post his request to keep from this thread turning into this eventual never ending debate.
Forum: Traditional Aircraft Engines 12-25-2020, 06:42 PM
Replies: 5
Egt
Views: 739
Posted By plehrke
I have EGTs that peak about 1520-1540F. 90% of...

I have EGTs that peak about 1520-1540F. 90% of my flight hours are flying with those peak EGT. as Martyrv6a said in post before me, it is all a function of how close to the flange the probe is...
Forum: RV Ongoing Maintenance Issues 12-25-2020, 04:12 AM
Replies: 57
Views: 13,113
Posted By plehrke
What is the recommendation for frequency of...

What is the recommendation for frequency of changing brake fluid for both types, the fire resistant Mil-H-83282 and the stuff used in general aviation Mil-H-5606?
Forum: RV models of the future (RV-??) 12-24-2020, 04:34 AM
Replies: 25
Views: 5,833
Posted By plehrke
You can move the wing and spar back to behind the...

You can move the wing and spar back to behind the pilot/passenger with an aft CG design by having an aft mounted pusher engine configuration or adjusting lift balance with a canard and wing...
Forum: RV General Discussion/News 12-23-2020, 02:45 PM
Replies: 12
Views: 3,143
Posted By plehrke
What ever happened to George and Becki? Their VHS...

What ever happened to George and Becki?
Their VHS tapes got me through most of my build. As Stu states, there was a time when all we had was Orndoff tapes, Matronics RV list, and The RVator...
Forum: RV-6/6A 12-23-2020, 05:17 AM
Replies: 26
Views: 3,939
Posted By plehrke
I have found too fast always produces a bad...

I have found too fast always produces a bad landing as the float makes me want to set it down before it is ready resulting in a bounce. Let it land when it wants to land. Also key to the correct...
Forum: RV Photo/Video URLs 12-23-2020, 04:42 AM
Replies: 18
Views: 2,045
Posted By plehrke
Excellent video. How many cameras in the...

Excellent video. How many cameras in the formation did you have including on the camera plane?
Great terrain back drop. Living here in mid US about the only interest features i have are the big...
Forum: RV-10 12-22-2020, 10:42 AM
Replies: 15
Views: 2,490
Posted By plehrke
If you don’t stop drill, a tiny crack grows into...

If you don’t stop drill, a tiny crack grows into a big crack. That is the only thing I remember from my material science class on the theory of crack propagation in college but probably the most...
Forum: RV-4 12-22-2020, 03:40 AM
Replies: 28
Views: 3,937
Posted By plehrke
Really? I do not think that would be considered...

Really? I do not think that would be considered an acceptable fix. Kind of scary to me.
Forum: RV General Discussion/News 12-20-2020, 04:59 AM
Replies: 7
Views: 1,210
Posted By plehrke
Ah, the memories. When I built this forum did not...

Ah, the memories. When I built this forum did not exist (and I walked uphill against the wind to and from school). In fact the Internet was new. We had the Matronix list but the rest was all...
Forum: Electronic Ignition Systems 12-20-2020, 04:34 AM
Replies: 14
Views: 1,981
Posted By plehrke
How does the mag get any feedback from EI firing?...

How does the mag get any feedback from EI firing? I donít see a feed back mechanism since all a mag knows is the drive gear is turning.
Forum: RV-9/9A 12-20-2020, 04:29 AM
Replies: 76
Views: 9,896
Posted By plehrke
Thanks Dan for the data. I was trying to...

Thanks Dan for the data.
I was trying to indirectly indicate to those building that shortening the stick does have some consequences. The RV stick forces are very light in trimmed flight so a...
Forum: RV-9/9A 12-19-2020, 06:38 PM
Replies: 76
Views: 9,896
Posted By plehrke
I assume you have your stick the length in the...

I assume you have your stick the length in the RV8 plans. You have not cut it off to be shorter. Do you think it would be doable if you had a 2” shorter than stick? I guess easy to do the math on...
Forum: RV General Discussion/News 12-16-2020, 05:10 PM
Replies: 52
Views: 8,533
Posted By plehrke
Maybe you could build one and get exactly what...

Maybe you could build one and get exactly what you want.
Forum: RV-6/6A 12-14-2020, 05:16 PM
Replies: 17
Views: 1,650
Posted By plehrke
You maybe pleasantly surprised at you increased...

You maybe pleasantly surprised at you increased performance in colder weather. Make you think you got an O360.

MO is not too cold, but then I am from MN now living in MO. I would be more worried...
Forum: RV models of the future (RV-??) 12-13-2020, 05:13 AM
Replies: 14
Views: 2,960
Posted By plehrke
I personally doubt Vans will ever put out a high...

I personally doubt Vans will ever put out a high wing bush plane but I have been wrong before, just ask my wife. Adding another model type, especially one that is not in the family of current...
Forum: RV-8/8A 12-12-2020, 03:42 AM
Replies: 6
Views: 1,155
Posted By plehrke
It takes quite a bit of heat to deform the...

It takes quite a bit of heat to deform the canopy.

A couple very obvious questions:
You sure the dehydrator is the cause?
Could it have been there before but never noticed?
Is there a bright halogen...
Forum: RV-10 12-06-2020, 04:21 AM
Replies: 13
Views: 1,356
Posted By plehrke
Carbon X...

Carbon X
https://www.aircraftspruce.com/catalog/cspages/chemcokleenjet.php
Forum: Safety 12-04-2020, 04:00 AM
Replies: 91
Views: 14,841
Posted By plehrke
If not neat, is it still airworthy?

No one has mentioned the real issues. Does it use aircraft quality wire, connectors, switches, hardware, etc? How good are the wire crimps? How good is any soldering? Are wires labeled?

Neatness is...
Forum: RV-6/6A 11-27-2020, 04:03 PM
Replies: 9
Views: 1,335
Posted By plehrke
Reskinning RV-6 Rudder to Eliminate Cracks

I built my rudder 23 years ago and has the original 0.016 skins. I had a few cracks develop years ago at the first stiffener rivet just aft of the front spar. During this Covid isolation I have...
Forum: Safety 11-24-2020, 04:08 PM
Replies: 10
Views: 1,834
Posted By plehrke
Same here, final bought one but I bought the $4...

Same here, final bought one but I bought the $4 spot ones. Yours and mine are both cheap way to mitigate the threat.
Forum: Electrical Systems 11-22-2020, 04:06 AM
Replies: 37
Views: 4,542
Posted By plehrke
Best answer so far :)(except for the PTT and trim)

Best answer so far :)(except for the PTT and trim)
Forum: Flight Testing 11-21-2020, 04:03 AM
Replies: 5
Views: 1,333
Posted By plehrke
A big driver in protuberance drag is how far back...

A big driver in protuberance drag is how far back on the fuselage or from leading edge it is. The thicker the boundary layer the less drag the protuberance causes.

Hanging stuff adds another type of...
Forum: RV-12/RV-12iS 11-20-2020, 04:48 AM
Replies: 34
Views: 12,182
Posted By plehrke
Dick and Mike went in longezes. Not non-stop....

Dick and Mike went in longezes. Not non-stop.

In 1997, Melvill and Dick Rutan flew two Long-Eze aircraft that they built side-by-side around the world. This "around the world in 80 nights" flight...
Forum: Electrical Systems 11-20-2020, 04:26 AM
Replies: 10
Views: 1,357
Posted By plehrke
I have the Show Planes in my -6A With no issues...

I have the Show Planes in my -6A With no issues or complaints in 950+ hours.
Forum: Engine Monitors 11-20-2020, 04:13 AM
Replies: 16
Views: 2,454
Posted By plehrke
+1 on this app. I have been using it for a few...

+1 on this app. I have been using it for a few years. It only runs on an iPad. I wish there was a version to run on my iPhone.
Forum: RV Building Tips/Techniques 11-17-2020, 05:16 PM
Replies: 20
Views: 3,619
Posted By plehrke
Not sure I would use very much filler on a...

Not sure I would use very much filler on a control surface to fill a dent. If you do, make sure you recheck the balance.
Forum: RV Ongoing Maintenance Issues 11-13-2020, 04:22 PM
Replies: 30
Views: 4,148
Posted By plehrke
I thought I would out smart the mess by...

I thought I would out smart the mess by installing a remote Airwolf filter on my fire wall facing up. Well, the hoses come in from the top and as soon as I unscrew and break the seal, oil come...
Forum: RV Ongoing Maintenance Issues 11-13-2020, 10:45 AM
Replies: 28
Views: 5,228
Posted By plehrke
Rapco

I use Rapco and they last a long time probably because I don't use a lot of brakes. I have my idle set low, RVs taxi well with just prop wash over the rudder, and I roll out on landing to keep the...
Forum: Electrical Systems 11-08-2020, 10:59 AM
Replies: 29
Views: 4,160
Posted By plehrke
How much easier/lighter/heavier would be putting...

How much easier/lighter/heavier would be putting in a few “classic” instruments for backup vs batteries? Blasphemy?
Forum: RV Building Tips/Techniques 11-06-2020, 11:52 AM
Replies: 15
Views: 2,476
Posted By plehrke
Most likely ice box rivets that are 2024 AL not...

Most likely ice box rivets that are 2024 AL not the AD rivets used in the RV. Usually used for large rivets.
Forum: RV Building Tips/Techniques 11-03-2020, 04:17 PM
Replies: 19
Views: 2,411
Posted By plehrke
I use an AN3 at 3-9 position. Only takes a minute...

I use an AN3 at 3-9 position. Only takes a minute to install/remove but you need to have two wrenches handy. 3-9 position provides more clearance of the bolt head and nut to surrounding structure at...
Forum: RV-6/6A 11-01-2020, 04:24 PM
Replies: 39
Views: 8,672
Posted By plehrke
The RVs have been designed, analyzed, and tested...

The RVs have been designed, analyzed, and tested to a given weight. Any time you are flying at a weight higher than the designed to weight, you are cutting into the safety margins. How much are you...
Forum: RV General Discussion/News 11-01-2020, 08:41 AM
Replies: 10
Views: 3,224
Posted By plehrke
Got up early and airborne yesterday before...

Got up early and airborne yesterday before sunrise. Very interesting clouds look like someone used too much water in their watercolor making them run but still very bright.
With a full moon...
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