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Search: Posts Made By: DanH
Forum: RV General Discussion/News Yesterday, 09:57 AM
Replies: 11
Views: 467
Posted By DanH
Do you need a flat black hood on your car?

Do you need a flat black hood on your car?
Forum: RV General Discussion/News Yesterday, 07:46 AM
Replies: 7
Views: 454
Posted By DanH
You have a busted seam, so it will need more than...

You have a busted seam, so it will need more than just filler.

Wingtip and wheelpant repairs are pretty much the same. Here are how scarf joints are laid, with excellent sanding pictures from Doug,...
Forum: RV General Discussion/News Yesterday, 07:08 AM
Replies: 15
Views: 797
Posted By DanH
If you really, really want clean edges, remove...

If you really, really want clean edges, remove the panel to the drill press. Fasten a backup sheet to it (clecos or screws) with the necessary pilot hole for a fly cutter in the center of the...
Forum: RV General Discussion/News 11-10-2018, 09:35 AM
Replies: 13
Views: 962
Posted By DanH
Not critical. What is in the scrap bin? I've...

Not critical. What is in the scrap bin? I've been using material around 0.050 (an old guy can TIG it on a shaky day), but 0.025 is just as fireproof.
Forum: RV General Discussion/News 11-09-2018, 06:22 PM
Replies: 13
Views: 962
Posted By DanH
Just a base plate with a tube welded to it.

Just a base plate with a tube welded to it.
Forum: Traditional Aircraft Engines 11-09-2018, 04:40 PM
Replies: 27
Views: 3,860
Posted By DanH
I am sure they do, but I'll be danged if I know...

I am sure they do, but I'll be danged if I know how to tell you what the part number might be.
Forum: Traditional Aircraft Engines 11-09-2018, 04:00 PM
Replies: 27
Views: 3,860
Posted By DanH
Quick follow up... The gel-filled inserts...

Quick follow up...

The gel-filled inserts probably failed due to overload, a case of excessive deflection of the mounts due to load and age. Sag in shear allows the middle of the gel bag to get...
Forum: RV General Discussion/News 11-09-2018, 02:37 PM
Replies: 13
Views: 962
Posted By DanH
A fella can weld up a tubular steel pass through...

A fella can weld up a tubular steel pass through for about fifty cents. Point it at any angle you wish.

http://www.vansairforce.com/community/showthread.php?t=72087

See post #38, 40, and 42.
Forum: RV-14 11-09-2018, 07:41 AM
Replies: 5
Views: 1,489
Posted By DanH
May I add a note here? A tubular steel firewall...

May I add a note here?

A tubular steel firewall pass-through filled with an intumescent sealant is very fire resistant. The sealant will also do a pretty good job of locking the components (wires,...
Forum: ADS-B 11-08-2018, 02:11 PM
Replies: 10
Views: 804
Posted By DanH
Ya'll please tell me about shadowing errors and...

Ya'll please tell me about shadowing errors and antenna proximity.

Shadowing is a line of sight issue, i.e. antenna can't see enough satellites? Or are we talking about the effect of another...
Forum: RV General Discussion/News 11-07-2018, 04:47 PM
Replies: 10
Views: 588
Posted By DanH
Yeah. Stop overloading. Simply learn as you...

Yeah. Stop overloading. Simply learn as you go.

Seriously, research the fine points when it is time tackle a particular part of the project. Do it now and you won't remember half of it, plus some...
Forum: RV-14 11-07-2018, 02:00 PM
Replies: 25
Views: 1,693
Posted By DanH
Yeah, that's a Superior-only crank, currently out...

Yeah, that's a Superior-only crank, currently out of production. It was used in the 382 and 400.

I doubt additional stroke changes the CHT vs advance relationship in any meaningful way.
Forum: RV-14 11-07-2018, 08:57 AM
Replies: 25
Views: 1,693
Posted By DanH
Don't know about a sweet spot, but FWIW, the 390...

Don't know about a sweet spot, but FWIW, the 390 has the same stroke as the 360.

Care to quantify "very little change"? Last check I made said running 20~30 LOP results in approximately 1.6 degrees...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 11-06-2018, 11:03 PM
Replies: 7
Views: 1,000
Posted By DanH
Slobovian Air Force formation training. Pretty...

Slobovian Air Force formation training. Pretty tight, eh?

https://www.danhorton.net/VAF/Invade%20Slobovia/Formation%20Training.jpg

Slobovian Air Force won primer war, but failed to defend against...
Forum: RV-14 11-06-2018, 10:42 PM
Replies: 25
Views: 1,693
Posted By DanH
Marvin was the only respondent to note ignition...

Marvin was the only respondent to note ignition timing, a very significant CHT factor.
Forum: Fuel Injection Systems 11-06-2018, 04:56 PM
Replies: 12
Views: 2,656
Posted By DanH
Carlos, can you show us the rest of the picture? ...

Carlos, can you show us the rest of the picture? How is the red cube connected to the servo?
Forum: Traditional Aircraft Engines 11-06-2018, 08:19 AM
Replies: 27
Views: 3,860
Posted By DanH
The gel "footballs" appear to be viscous dampers,...

The gel "footballs" appear to be viscous dampers, without any load capacity of their own. As such they would limit startup engine shake, largely a torsional reaction around the crank which displaces...
Forum: VAF Classifieds (posts in here deleted after 30 days) 11-05-2018, 07:59 AM
Replies: 3
Views: 233
Posted By DanH
Be sure to get the updated panel dock with a...

Be sure to get the updated panel dock with a clearance slot in the left side to clear the right-angle mini USB connector. The early no-slot dock tends to knock the USB socket off the board, which...
Forum: Traditional Aircraft Engines 11-05-2018, 06:58 AM
Replies: 27
Views: 8,444
Posted By DanH
1-1/4" Yes, they're made by Rosta Vernatherm. ...

1-1/4"

Yes, they're made by Rosta Vernatherm. The magic is in the core:

https://www.vernatherm.com/thermal_actuators.html
Forum: Propellers 11-05-2018, 06:41 AM
Replies: 17
Views: 748
Posted By DanH
Screws in the front bulkhead are not an absolute...

Screws in the front bulkhead are not an absolute requirement. However, without screws, zero clearance between the bulkhead flange and the inside of the spinner is a must.

The problem seems to take...
Forum: Traditional Aircraft Engines 11-04-2018, 09:53 PM
Replies: 27
Views: 3,860
Posted By DanH
Failed Mount Isolators

Engine seemed a bit shaky recently, so today the cowl came off for a look. Problem wasn't hard to find:

https://www.danhorton.net/VAF/Failed%20Mount%20Isolators/Slime1.jpg

The liquid was...
Forum: RV-14 11-02-2018, 09:30 PM
Replies: 20
Views: 2,037
Posted By DanH
The IO-390/Hartzell BA test mule was Marc Cook's...

The IO-390/Hartzell BA test mule was Marc Cook's Sportsman. See the November 2006 issue of Kitplanes for the article titled "Good Vibrations, Bad Vibrations". Subscribers can download it at...
Forum: RV-14 11-02-2018, 05:48 PM
Replies: 20
Views: 2,037
Posted By DanH
They most definitely mean p-mags.

They most definitely mean p-mags.
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 11-02-2018, 05:41 PM
Replies: 7
Views: 1,000
Posted By DanH
Invade Slobovia!

Call your buddies. Pass the word. Tomorrow we're invading Outer Slobovia.

The invasion force will assemble at 08A, around plates of hot pancakes dripping with butter and syrup, and plot our...
Forum: RV-14 11-02-2018, 04:56 PM
Replies: 20
Views: 2,037
Posted By DanH
There is no FAA issue.

There is no FAA issue.
Forum: Traditional Aircraft Engines 11-02-2018, 11:08 AM
Replies: 8
Views: 904
Posted By DanH
You want Nigel's article written for Kitplanes,...

You want Nigel's article written for Kitplanes, May 2017 issue. His is a parallel valve. Angle valve heads seem to require less advance.
Forum: Traditional Aircraft Engines 11-02-2018, 09:38 AM
Replies: 8
Views: 904
Posted By DanH
BMEP is a theoretical yardstick derived from...

BMEP is a theoretical yardstick derived from torque and displacement. The unit happens to be pressure, but it tells nothing about the location of peak pressure or pressure later in the stroke. A...
Forum: RV General Discussion/News 11-02-2018, 08:30 AM
Replies: 8
Views: 1,093
Posted By DanH
The specific reason for using straight mineral...

The specific reason for using straight mineral oil is the lack of additives which may or may not be good for you. Not sayin' you should not use any particular product, but if you're smelling much...
Forum: Alternative Engines 11-02-2018, 08:21 AM
Replies: 5
Views: 719
Posted By DanH
The avgas engine components are still available,...

The avgas engine components are still available, via complete engines delivered from a shop in the UK. There is no US-based shop assembling them right now. A year ago Andrew was actively looking...
Forum: RV General Discussion/News 11-01-2018, 10:06 AM
Replies: 9
Views: 835
Posted By DanH
Yeah, that happens when a builder thins epoxy...

Yeah, that happens when a builder thins epoxy with a solvent. Thinning epoxy is A Bad Idea, but still recommended here and there.



I'm not discounting it Larry. As noted, it's exactly what I do...
Forum: RV-14 11-01-2018, 09:23 AM
Replies: 7
Views: 570
Posted By DanH
That would be the guy who thought the paint shop...

That would be the guy who thought the paint shop would take care of it. ;)
Forum: RV General Discussion/News 11-01-2018, 09:14 AM
Replies: 9
Views: 835
Posted By DanH
The result of experience. In forty years the EZ...

The result of experience. In forty years the EZ community has already tried every shortcut and filler imaginable.

The SPI recommendation Larry outlined is the same as that offered by a PPG rep...
Forum: RV General Discussion/News 10-31-2018, 06:16 PM
Replies: 8
Views: 1,093
Posted By DanH
Skip shipping and order from your local oil...

Skip shipping and order from your local oil distributor. "Smoke oil", despite all the claims, is generally any light paraffinic mineral oil with no additives. The old standards were Texaco Canopus...
Forum: RV General Discussion/News 10-30-2018, 02:08 PM
Replies: 9
Views: 1,064
Posted By DanH
Good thinkin' Bill. One tweak...instead of...

Good thinkin' Bill.

One tweak...instead of tape, fixate the strips back in place using some scrap aluminum and clecos. It's easy to fill the cleco holes later, and the aluminum can be bent and...
Forum: Electrical Systems 10-30-2018, 10:31 AM
Replies: 19
Views: 1,338
Posted By DanH
That's smart Joe. The act of re-drawing anyone's...

That's smart Joe. The act of re-drawing anyone's proposed system promotes real understanding. I've found re-drawing and organizing and generally cleaning up my own drawings is a worthwhile thought...
Forum: RV General Discussion/News 10-30-2018, 08:21 AM
Replies: 28
Views: 7,350
Posted By DanH
Done, post #7. Comrade Vlad and friends took the...

Done, post #7.

Comrade Vlad and friends took the concept and did a great job adapting it his RV9, complete with tiedown mount point, electric release, and a few nice design tweaks. I'll leave the...
Forum: Primers 10-29-2018, 07:23 AM
Replies: 15
Views: 12,244
Posted By DanH
Sailplanes commonly need refinishing because ...

Sailplanes commonly need refinishing because their polyester finishes shrink, crack, craze, and blister. There are even AD's prohibiting some polyesters.

The glider community puts up with that...
Forum: Primers 10-28-2018, 10:28 PM
Replies: 15
Views: 12,244
Posted By DanH
Why was this product recommended?

Why was this product recommended?
Forum: RV General Discussion/News 10-28-2018, 11:42 AM
Replies: 23
Views: 1,046
Posted By DanH
What is an "alternator short alarm? What exactly...

What is an "alternator short alarm? What exactly is your VPX trying to tell you?
Forum: Electrical Systems 10-28-2018, 09:14 AM
Replies: 19
Views: 1,338
Posted By DanH
Carl, you say that every time someone asks about...

Carl, you say that every time someone asks about electrical systems. If you believe it to be as good as something from Nuckolls or Ausman, post it here for peer review.
Forum: RV General Discussion/News 10-28-2018, 08:48 AM
Replies: 14
Views: 1,287
Posted By DanH
I spoke with the XM rep at AOPA Gulf Shores...

I spoke with the XM rep at AOPA Gulf Shores yesterday, and he suggested exactly that.



Pretty sure the aviation side is a separate division.

FWIW, I've been a weather subscriber eight years...
Forum: RV General Discussion/News 10-26-2018, 12:42 PM
Replies: 14
Views: 1,287
Posted By DanH
Call 800-384-6500

Call 800-384-6500
Forum: RV General Discussion/News 10-26-2018, 11:31 AM
Replies: 14
Views: 1,287
Posted By DanH
Still $29.95 p/mo for Aviator LT. Am I missing...

Still $29.95 p/mo for Aviator LT. Am I missing something?
Forum: RV Building Tips/Techniques 10-26-2018, 08:03 AM
Replies: 24
Views: 946
Posted By DanH
http://www.vansairforce.com/community/showpost.php...

http://www.vansairforce.com/community/showpost.php?p=971560&postcount=2

http://www.vansairforce.com/community/showpost.php?p=984819&postcount=12
Forum: RV Building Tips/Techniques 10-25-2018, 05:00 PM
Replies: 24
Views: 946
Posted By DanH
Take a really close look. Any actual cracks in...

Take a really close look. Any actual cracks in the surface? If not, you're probably looking at the mirror image of surface defects (gelcoat cracks) in the mold.

Adding...
Forum: RV-8/8A 10-25-2018, 08:39 AM
Replies: 49
Views: 4,684
Posted By DanH
Yes. Oval swage sleeves are not...

Yes. Oval swage sleeves are not difficult.

Maybe more than you want to know...

https://www.danhorton.net/VAF/Chains%20or%20RV%20Rocket%20Steering%20Link/1213_BigSqueeze_r2.pdf
Forum: Fuel Injection Systems 10-25-2018, 08:05 AM
Replies: 93
Views: 25,801
Posted By DanH
Naaa. 200F or less in that location. Mags and...

Naaa. 200F or less in that location. Mags and similar gear bolted directly to the hot engine only max around 220.



In the context of your question, it doesn't matter what kind of injection or...
Forum: RV General Discussion/News 10-23-2018, 03:33 PM
Replies: 31
Views: 2,654
Posted By DanH
Done, prop rotates 92 degrees for 12 inches, so...

Done, prop rotates 92 degrees for 12 inches, so about half the disc area is free pass.



I dunno about 'ole Eagle Eye. He scored me with three cut streamers, and Lord knows, I'll take all the help...
Forum: Electrical Systems 10-23-2018, 02:28 PM
Replies: 66
Views: 5,246
Posted By DanH
There's #2... ..and #3.

There's #2...



..and #3.
Forum: RV-10 10-23-2018, 01:46 PM
Replies: 48
Views: 3,580
Posted By DanH
Actually, I directly measured average bleed air...

Actually, I directly measured average bleed air deltas about two weeks ago, and expect to measure on a per cycle basis in the near future. The differential pressure transducer got here last...
Forum: RV-10 10-23-2018, 10:12 AM
Replies: 48
Views: 3,580
Posted By DanH
At WOT the bleed air delta is very low, not that...

At WOT the bleed air delta is very low, not that it matters in this context. Pressure increases on both sides of the nozzle (cooling plenum space and within the cylinder head intake tract), thus...
Forum: Electrical Systems 10-22-2018, 05:26 PM
Replies: 66
Views: 5,246
Posted By DanH
See? I told ya'. There's #1. ;)

See? I told ya'. There's #1. ;)
Forum: RV General Discussion/News 10-22-2018, 05:16 PM
Replies: 31
Views: 2,654
Posted By DanH
Vlad, you might have the advantage here. Antonov...

Vlad, you might have the advantage here. Antonov showed a counter-rotating eight plus six on the AN-70 at the Paris Airshow....14 blades in one disc. A supersonic hummingbird wouldn't have a...
Forum: RV-10 10-22-2018, 04:06 PM
Replies: 48
Views: 3,580
Posted By DanH
65%, and it's not a hard limit, merely a...

65%, and it's not a hard limit, merely a recommendation.



Then don't.

Personally I think roughness is about the only bad thing you can cause with a mixture knob at 9500 feet.
Forum: RV-10 10-22-2018, 02:34 PM
Replies: 48
Views: 3,580
Posted By DanH
Yeah, do it wrong and the scary clown pops out of...

Yeah, do it wrong and the scary clown pops out of the oil door.

https://www.danhorton.net/VAF/Lean%20of%20Peak%20Operation%20Question/Red%20Box.jpg



Descend LOP for as long it runs smoothly. I...
Forum: RV General Discussion/News 10-22-2018, 01:31 PM
Replies: 31
Views: 2,654
Posted By DanH
Balloon is 9", speed is 2112 inches per...

Balloon is 9", speed is 2112 inches per second.

2700 RPM is 16200 degrees per second.

Thus (9 * 16200) / 2112 = 69 degrees during balloon passage.

Only 61 degrees if done at 2400.

Thank you...
Forum: Trip Write-ups 10-22-2018, 10:09 AM
Replies: 6
Views: 1,123
Posted By DanH
Maybe the best PJ ever...but I say that every...

Maybe the best PJ ever...but I say that every year.

For those (like Figs) who lost their child's college fund betting on my balloon busting performance, well, sorry. I missed the balloons on...
Forum: RV Ongoing Maintenance Issues 10-22-2018, 08:08 AM
Replies: 5
Views: 408
Posted By DanH
Evan, how old is that pump? Some recent...

Evan, how old is that pump? Some recent dismantling of Lycoming pumps suggests they have an age limit.
Forum: RV-10 10-22-2018, 07:59 AM
Replies: 48
Views: 3,580
Posted By DanH
Let's tidy up a few fundamentals before moving...

Let's tidy up a few fundamentals before moving forward.

Manifold pressure units are not a percentage. It is expressed in inches of mercury (abbreviated ""Hg"), typically measured at the intake port...
Forum: Electrical Systems 10-21-2018, 05:54 PM
Replies: 66
Views: 5,246
Posted By DanH
The gadget junkie and the VPX: (1) Claims you...

The gadget junkie and the VPX:

(1) Claims you can't know how good it is until you try it.

(2) Choice to use is mostly supported by other users.

(3) Believes it enhances ability to function.

(4)...
Forum: RV Building Tips/Techniques 10-21-2018, 07:26 AM
Replies: 2
Views: 485
Posted By DanH
The pliobond isn't necessary. Just capture the...

The pliobond isn't necessary. Just capture the fiberfrax between the foil and the painted surface.
"Wipe" it firmly with a plastic squeegee.
Forum: Places To Fly...Things to See...Things to Eat 10-18-2018, 12:05 PM
Replies: 7
Views: 1,095
Posted By DanH
Those cost $10. For $12, we do it in sprinkles.

Those cost $10. For $12, we do it in sprinkles.
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