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Search: Posts Made By: DanH
Forum: VAF Classifieds (posts in here deleted after 30 days) Yesterday, 08:13 AM
Replies: 6
Views: 1,158
Posted By DanH
Given the consistent loss of pilot population,...

Given the consistent loss of pilot population, we're all flying bad investments, more or less.

Me? I don't care. I wanted to be here my whole life.
Forum: Fiberglass Yesterday, 07:36 AM
Replies: 25
Views: 13,666
Posted By DanH
A water-viscosity epoxy as a seal coat... I...

A water-viscosity epoxy as a seal coat...

I was asked to fabricate and install larger tire clearance blisters in a set of Falco gear doors. First task was to fabricate a form defining the shape...
Forum: RV General Discussion/News 10-15-2018, 09:40 PM
Replies: 6
Views: 226
Posted By DanH
My recent experience is identical.

My recent experience is identical.
Forum: Places To Fly...Things to See...Things to Eat 10-15-2018, 07:23 PM
Replies: 1
Views: 220
Posted By DanH
Pancakes! Wetumpka 08A

Wetumpka Municipal 08A, just north of Montgomery

https://www.danhorton.net/VAF/Pancakes/Pancake%20110318.JPG
Forum: RV-8/8A 10-14-2018, 11:27 AM
Replies: 12
Views: 3,540
Posted By DanH
Sure, if you only fly munchkins in the back seat.

Sure, if you only fly munchkins in the back seat.
Forum: Traditional Aircraft Engines 10-13-2018, 05:33 AM
Replies: 25
Views: 3,310
Posted By DanH
There are way too many variables to judge mixture...

There are way too many variables to judge mixture from fuel flow. instead, determine degrees EGT in relation to peak.

Start reading at post...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 10-12-2018, 11:32 AM
Replies: 3
Views: 318
Posted By DanH
Thomasville Fly-In is a GO

I just got off the phone with the airport manager at Thomasville GA...the 51st annual Thomasville Fly-In is open for business.

He said the airport and most of the downtown eating establishments...
Forum: RV General Discussion/News 10-11-2018, 07:28 AM
Replies: 55
Views: 2,706
Posted By DanH
Maybe it's generational, but I can't stay awake...

Maybe it's generational, but I can't stay awake watching the typical how-to video. They are generally slow and boring, with narrators who seem to have been picked for their ability to speak in a...
Forum: RV-10 10-10-2018, 08:04 AM
Replies: 22
Views: 1,851
Posted By DanH
Gain it somewhere else. Consider the difference...

Gain it somewhere else. Consider the difference in thermal expansion rates. The CTE's are roughly...

units in/in per degree F

carbon/epoxy 0.000001
glass/epoxy 0.000007
aluminum ...
Forum: RV-7/7A 10-10-2018, 07:19 AM
Replies: 38
Views: 3,007
Posted By DanH
Previously I said... ...so I poured a cup of...

Previously I said...



...so I poured a cup of coffee this AM, then dug out the spreadsheet, an RV-7 leg drawing, and the Michelin Tire Databook. After making a few corrections, we...
Forum: RV-7/7A 10-09-2018, 09:22 PM
Replies: 38
Views: 3,007
Posted By DanH
Not at 8.1 ft/sec. One of Neal Willford's...

Not at 8.1 ft/sec.



One of Neal Willford's excellent design spreadsheets. The whole series was available for download, but I just searched EAA.org without luck. They were published circa 2003. ...
Forum: RV-7/7A 10-09-2018, 10:50 AM
Replies: 38
Views: 3,007
Posted By DanH
Folded at impact, given an 8.1 ft sec descent...

Folded at impact, given an 8.1 ft sec descent rate.
Forum: RV General Discussion/News 10-09-2018, 07:21 AM
Replies: 13
Views: 831
Posted By DanH
I mixed Flamemaster sealant samples at 10 to 1,...

I mixed Flamemaster sealant samples at 10 to 1, 10 to 2, and 10 to 1/2 ratios, i.e. standard mix, double the manganese dioxide, and half the manganese dioxide. All cured just fine, and had similar...
Forum: RV General Discussion/News 10-09-2018, 06:59 AM
Replies: 13
Views: 831
Posted By DanH
With respect, sealant absolutely positively can...

With respect, sealant absolutely positively can revert. The issue is peroxide formation, observed and studied starting about 50 years ago. And it's been seen here for quite some...
Forum: Electrical Systems 10-09-2018, 05:28 AM
Replies: 5
Views: 315
Posted By DanH
And please don't leave the p-lead hanging from a...

And please don't leave the p-lead hanging from a crimped ring terminal.

https://www.danhorton.net/VAF/Magneto%20Wiring/P%20Lead%20Fixation.jpg
Forum: RV-7/7A 10-08-2018, 04:15 PM
Replies: 38
Views: 3,007
Posted By DanH
...in particular if the jack and spare tube are...

...in particular if the jack and spare tube are needed for ballast anyway ;)

Kidding aside, the numbers don't lie. At 1800 lbs and 8.1 ft per/sec with 90% on the mains, the dead minimum is 36 psi...
Forum: Fuel Injection Systems 10-08-2018, 08:19 AM
Replies: 5
Views: 477
Posted By DanH
Trust me, we all do. The page you linked shows a...

Trust me, we all do.

The page you linked shows a system no longer available. That system was based on re-badged SDS ECU, in a model now considered obsolete by both SDS and EFII.

EFII is...
Forum: RV General Discussion/News 10-08-2018, 06:12 AM
Replies: 49
Views: 8,164
Posted By DanH
I imagine Ross could have one made without the...

I imagine Ross could have one made without the big lightening holes in the conical section, but a lot of the weight savings would be gone. If running a prop extension, the foam seal approach seems...
Forum: RV General Discussion/News 10-07-2018, 08:48 AM
Replies: 12
Views: 783
Posted By DanH
Heat gun, plastic scraper, carefully. This is...

Heat gun, plastic scraper, carefully.

This is the best commercial adhesive remover I've found. I buy gallons on eBay to remove adhesive from truck bodies after vinyl wrap removal. Turns adhesive...
Forum: Fiberglass 10-06-2018, 09:32 PM
Replies: 95
Views: 122,471
Posted By DanH
Ok, it's used on old used cars and old used...

Ok, it's used on old used cars and old used gliders.
Forum: Fiberglass 10-05-2018, 08:50 PM
Replies: 25
Views: 13,666
Posted By DanH
I've used a lot of System Three Clear Coat. ...

I've used a lot of System Three Clear Coat. Great for sealing fiberglass and aviation plywood.

https://www.systemthree.com/products/clear-coat-low-viscosity-epoxy-sealer
Forum: Fiberglass 10-05-2018, 06:08 PM
Replies: 25
Views: 13,666
Posted By DanH
A epoxy wipe is just what it sounds like. Use a...

A epoxy wipe is just what it sounds like. Use a squeegee or an old key card or similar. Slop some mixed epoxy on the surface, then wipe back and forth as desired, with the goal of squeezing it down...
Forum: Traditional Aircraft Engines 10-04-2018, 05:25 PM
Replies: 21
Views: 1,812
Posted By DanH
Ok then, you're good. I was mistaken; thought...

Ok then, you're good. I was mistaken; thought you had numbers up.
Forum: Primers 10-04-2018, 03:09 PM
Replies: 18
Views: 883
Posted By DanH
Apples to apples....epoxy primer, or the...

Apples to apples....epoxy primer, or the self-etching stuff, or....?
Forum: Traditional Aircraft Engines 10-04-2018, 01:29 PM
Replies: 21
Views: 1,812
Posted By DanH
Now that we've thoroughly covered "don't swap the...

Now that we've thoroughly covered "don't swap the rod caps", so let's go back to the last photo. Per the manual, the numbers should face down, toward the sump. Number 1 is the right front cylinder....
Forum: Primers 10-04-2018, 09:00 AM
Replies: 18
Views: 883
Posted By DanH
I'll say no. I don't think a few days will make...

I'll say no. I don't think a few days will make any difference at all. The skins and ribs are alclad, a surface coating of 1100. Oxidation is very slow. The clean and scuff process is more about,...
Forum: Traditional Aircraft Engines 10-03-2018, 02:02 PM
Replies: 21
Views: 1,812
Posted By DanH
Clue: when 1 and 2 are at TDC, 3 and 4 are at BDC.

Clue: when 1 and 2 are at TDC, 3 and 4 are at BDC.
Forum: RV-14 10-03-2018, 01:51 PM
Replies: 25
Views: 3,603
Posted By DanH
A few piccolo tubes might lead to...

A few piccolo tubes might lead to enlightenment.



I assume you mean glass wrap extending above the 9 and 3 o-clock plane. Not likely to blow off there, as static pressure pushes it toward the...
Forum: RV-14 10-03-2018, 07:17 AM
Replies: 25
Views: 3,603
Posted By DanH
That's a fair point, and I'm not gonna bore...

That's a fair point, and I'm not gonna bore everyone with a homily about "better". The factory crew has the unenviable task of developing methods and instructions for everyone, which includes the...
Forum: RV-14 10-02-2018, 09:14 PM
Replies: 25
Views: 3,603
Posted By DanH
Yep, Loctite 598 or Permatex Ultra Black, same...

Yep, Loctite 598 or Permatex Ultra Black, same product. Roll it into the cloth between two sheets of 4 mil plastic. Cut the exact shape you wish to apply. Peel one side, stick it to the fins. ...
Forum: RV Friends Who Have Passed On 10-02-2018, 04:57 PM
Replies: 7
Views: 1,160
Posted By DanH
Hey guys, thanks, but it's not about me. This is...

Hey guys, thanks, but it's not about me.

This is Allen. He didn't get to finish his 7, but I'm pretty sure it will get finished, and it did give him an RV grin. Nuff...
Forum: RV-14 10-01-2018, 08:59 PM
Replies: 25
Views: 3,603
Posted By DanH
I dunno 'ole buddy. If the stripes space the...

I dunno 'ole buddy. If the stripes space the wraps away from the fins by .030", there's a .030" wide leak gap along the side edges.

If the goal is to stop fretting and keep all the air where it...
Forum: RV Friends Who Have Passed On 10-01-2018, 09:01 AM
Replies: 7
Views: 1,160
Posted By DanH
Allen Fulmer

Allen passed last night, at home with family.

I'd like to thank all those who expressed an interest in his RV-7, and of course Daren, who purchased it. Same for various hangar clean out items. ...
Forum: RV-14 10-01-2018, 05:08 AM
Replies: 25
Views: 3,603
Posted By DanH
The sealant you want is Loctite...

The sealant you want is Loctite 598.

https://www.henkel-adhesives.com/us/en/product/gasketing-sealants--flange-sealants/loctite_si_598.html

Available in a 300ml caulk tubes or small squeeze tubes. ...
Forum: Propellers 09-28-2018, 07:08 AM
Replies: 15
Views: 1,265
Posted By DanH
Jim, you have a very large audience here, so why...

Jim, you have a very large audience here, so why not write a good tutorial about the physics of engine and propeller balance? Not the balance process, but the mechanics and forces. For example, I'd...
Forum: RV General Discussion/News 09-27-2018, 09:02 AM
Replies: 8
Views: 912
Posted By DanH
I'm confused. Which one is...

I'm confused. Which one is Vern?

https://www.danhorton.net/VAF/Vern%20Darley/VAFDR_06%20Sep.%2026%2017.28.jpg
Forum: Tools 09-26-2018, 03:19 PM
Replies: 20
Views: 1,353
Posted By DanH
Optics as good as my B&L Coddington, much better...

Optics as good as my B&L Coddington, much better light, overall better quality...and cheap as dirt:

https://www.tomtop.com/p-h9152.html
Forum: RV-8/8A 09-26-2018, 03:14 PM
Replies: 12
Views: 3,540
Posted By DanH
Exactly like a standard RV-8. While the "door...

Exactly like a standard RV-8.

While the "door size" is the same, the increased compartment height is really handy.
Forum: VAF Classifieds (posts in here deleted after 30 days) 09-26-2018, 07:35 AM
Replies: 44
Views: 5,904
Posted By DanH
Deposits are an interesting discussion in...

Deposits are an interesting discussion in themselves.

Assume you arrive at a verbal agreement which includes the opportunity for a third party inspection. A deposit subject to inspection can work...
Forum: VAF Classifieds (posts in here deleted after 30 days) 09-25-2018, 09:05 AM
Replies: 44
Views: 5,904
Posted By DanH
An ad stating "no tire kickers" means the seller...

An ad stating "no tire kickers" means the seller doesn't understand the typical sales process.

Set aside the Hollywood versions, and look at a fundamental. Way back in the 1970's we taught that...
Forum: RV General Discussion/News 09-24-2018, 01:33 PM
Replies: 66
Views: 6,164
Posted By DanH
Poor example. I was a Piper salesman way back...

Poor example. I was a Piper salesman way back when. It's a miserable system from a human factors standpoint.

The big red light is "Gear Unsafe". It illuminates when the gear is in transit during...
Forum: RV General Discussion/News 09-24-2018, 09:54 AM
Replies: 66
Views: 6,164
Posted By DanH
I fail to understand concerns about a start...

I fail to understand concerns about a start button on the grip. Yes, it needs to be wired through a separate start arming switch. It is trivial to wire the arming circuit so it flashes a big red...
Forum: RV General Discussion/News 09-23-2018, 06:39 AM
Replies: 2
Views: 346
Posted By DanH
Steve, it's just a standard cabinet lock. I'm...

Steve, it's just a standard cabinet lock.

I'm working from memory here, about six years back, so best I can do is concept...

I think the lock came from Home Depot, similar to this one. The...
Forum: RV General Discussion/News 09-20-2018, 06:11 PM
Replies: 54
Views: 8,639
Posted By DanH
As usual, not much ;) The tests were conducted...

As usual, not much ;)

The tests were conducted with three barrels of Swift fuel, two different 100LL fuels purchased at the local airport, and a specially manufactured minimum specification 100LL. ...
Forum: RV-10 09-20-2018, 09:36 AM
Replies: 3
Views: 764
Posted By DanH
Don't need a James cowl. A builder can put a 14"...

Don't need a James cowl. A builder can put a 14" spinner on anything. Here's one with an otherwise stock RV-8 cowl:

https://www.danhorton.net/VAF/14%20Spinner/RF%20Open.JPG
Forum: RV General Discussion/News 09-19-2018, 05:50 PM
Replies: 39
Views: 4,687
Posted By DanH
Ahhh, thus the difference in sound when they fly...

Ahhh, thus the difference in sound when they fly past the pits.
Forum: RV General Discussion/News 09-19-2018, 10:23 AM
Replies: 39
Views: 4,687
Posted By DanH
Ross, It's racing and you can't tell all, but...

Ross, It's racing and you can't tell all, but what are Andy and Jeff running these days? Put another way, what does it take to run up front in Sport Gold?
Forum: RV General Discussion/News 09-18-2018, 06:54 AM
Replies: 54
Views: 8,639
Posted By DanH
Sorry, brain fart, meant to ask slightly more,...

Sorry, brain fart, meant to ask slightly more, not less; returning to the examples (post 41), again note the absolute EGT values change, but the relationship between delta-from-peak and mixture...
Forum: RV General Discussion/News 09-17-2018, 07:52 AM
Replies: 54
Views: 8,639
Posted By DanH
That's a nice tight spread. Do the same check at...

That's a nice tight spread. Do the same check at 8000 or where ever you like to cruise, and if the spread remains that tight, leave the restrictors alone.

Note that all mixture checks should be...
Forum: RV General Discussion/News 09-16-2018, 09:21 PM
Replies: 54
Views: 8,639
Posted By DanH
Perfect. The relationship between delivered...

Perfect.

The relationship between delivered mixture and delta-to-peak is entirely reliable. You're right around 0.085 F/A, or 11.75 to 1 air-fuel, richer than max power. You can plot it yourself...
Forum: RV General Discussion/News 09-15-2018, 06:06 AM
Replies: 54
Views: 8,639
Posted By DanH
BTW Tom, note the "detonation onset" black tic...

BTW Tom, note the "detonation onset" black tic marks on those plots. They are located on the rich side of peak, between best power and peak EGT.

Most engines make maximum power on mixture leaned to...
Forum: RV General Discussion/News 09-14-2018, 02:46 PM
Replies: 54
Views: 8,639
Posted By DanH
Ok, the rest of the story... This is a classic...

Ok, the rest of the story...

This is a classic Lycoming document with a few added notes at the bottom. Note the temperature scale at the upper left. It is certainly possible to lower CHT by adding...
Forum: RV General Discussion/News 09-14-2018, 08:30 AM
Replies: 54
Views: 8,639
Posted By DanH
Evaporation makes only a very small contribution...

Evaporation makes only a very small contribution to cooling. An excessively rich mixture delays peak cylinder pressure and lowers combustion temperature. The overall result is a power...
Forum: RV-8/8A 09-13-2018, 10:52 AM
Replies: 23
Views: 2,177
Posted By DanH
I think it is always reasonable to note such...

I think it is always reasonable to note such loads.
I have not calculated anything, but the assembly is at 800 hours and counting.

Not much difference when compared to the s-link attachment.
Forum: RV General Discussion/News 09-13-2018, 07:08 AM
Replies: 54
Views: 8,639
Posted By DanH
Tom, do yourself a favor and forget about fuel...

Tom, do yourself a favor and forget about fuel flow. You're trying to determine mixture at full throttle. Without a mixture check, both you and the Avstar guy are guessing.

More later, but just...
Forum: RV-8/8A 09-13-2018, 06:15 AM
Replies: 23
Views: 2,177
Posted By DanH
A loose chain, link, or cable generally allows...

A loose chain, link, or cable generally allows the tailwheel to swivel past the release point before the rudder reaches its stop. Bad juju. It should need to stretch a spring to reach the release...
Forum: RV General Discussion/News 09-12-2018, 05:49 PM
Replies: 54
Views: 8,639
Posted By DanH
Did you discuss full throttle, full rich EGT in...

Did you discuss full throttle, full rich EGT in relation to peak EGT?
Forum: RV General Discussion/News 09-12-2018, 03:37 PM
Replies: 24
Views: 2,321
Posted By DanH
Offer him a beer. I mean a good beer. A man once...

Offer him a beer. I mean a good beer. A man once offered me a Bud Light. That airplane never flew.
Forum: RV General Discussion/News 09-11-2018, 04:22 PM
Replies: 54
Views: 8,639
Posted By DanH
Listening to folks insist on fat mixtures for...

Listening to folks insist on fat mixtures for cooling may be Earth's closest equivalent to Vogon poetry.
Forum: RV-8/8A 09-11-2018, 03:52 PM
Replies: 14
Views: 1,687
Posted By DanH
Seriously, there is nothing suspect about a...

Seriously, there is nothing suspect about a standard RV-8 cowl. I've seen the pressure measurements.
Forum: RV General Discussion/News 09-11-2018, 04:33 AM
Replies: 66
Views: 6,164
Posted By DanH
http://www.vansairforce.com/community/showthread.p...

http://www.vansairforce.com/community/showthread.php?t=159773&highlight=ptt
Forum: RV-8/8A 09-10-2018, 04:27 PM
Replies: 14
Views: 1,687
Posted By DanH
There is a lot in the linked thread (below) about...

There is a lot in the linked thread (below) about low Vi/Vo inlets, but the standard RV-8 cowl also responds very well to reduced exit...
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