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Search: Posts Made By: DanH
Forum: RV General Discussion/News Yesterday, 03:14 PM
Replies: 14
Views: 1,172
Posted By DanH
Darn. Now I can't plead ignorance.

Darn. Now I can't plead ignorance.
Forum: Traditional Aircraft Engines Yesterday, 09:20 AM
Replies: 10
Views: 1,902
Posted By DanH
I saw that too. Although "long reach", they are...

I saw that too. Although "long reach", they are recessed into the head due to the adapters. Perhaps enough local quench to keep plug temperatures within limits? I'm spitballing here.

Don, got any...
Forum: Reviews Yesterday, 08:41 AM
Replies: 6
Views: 473
Posted By DanH
Note to self...When developing product for...

Note to self...When developing product for homebuilders, assume they will dismantle it. ;)
Forum: RV General Discussion/News Yesterday, 08:14 AM
Replies: 14
Views: 1,172
Posted By DanH
I'm with Bob. First, is there written opinion...

I'm with Bob.

First, is there written opinion or direction from the FAA (not AOPA) on this specific subject?

Absent specific interpretation, FAR 91.109 seems to offer reasonable support for a...
Forum: RV General Discussion/News Yesterday, 07:33 AM
Replies: 17
Views: 1,205
Posted By DanH
I would consider the existing coating to be...

I would consider the existing coating to be suspect, so I'd pull 'em, strip 'em, work the surface, and repaint.

They are highly stressed springs, and as such, should not be allowed to develop rust...
Forum: Electronic Ignition Systems 01-16-2019, 09:45 PM
Replies: 17
Views: 2,246
Posted By DanH
I don't think there is a direct sales site. This...

I don't think there is a direct sales site.

This one...

https://www.ngk.com

...is a distributor also known as www.sparkplugs.com
Forum: RV General Discussion/News 01-16-2019, 01:49 PM
Replies: 43
Views: 1,701
Posted By DanH
Otis, if you want to redesign for an all-electric...

Otis, if you want to redesign for an all-electric aircraft fuel system, make the jump to the 21st century. Investigate brushless fuel pumps. No brush wear, less heating, higher efficiency, and your...
Forum: RV General Discussion/News 01-16-2019, 12:57 PM
Replies: 43
Views: 1,701
Posted By DanH
You do realize the unwashed run their cars dry...

You do realize the unwashed run their cars dry from time to time?
Forum: Traditional Aircraft Engines 01-16-2019, 09:57 AM
Replies: 10
Views: 1,902
Posted By DanH
I suspect Don means "...if you replace them at...

I suspect Don means "...if you replace them at each condition inspection." They cost twice as much.

FWIW, I'm running IKH27's over 200 hours, currently alternating top and bottom replacements at...
Forum: RV Photo/Video URLs 01-15-2019, 04:50 PM
Replies: 8
Views: 732
Posted By DanH
The Ramp Vermin show up among the well-heeled...

The Ramp Vermin show up among the well-heeled everywhere.

Chattanooga, Wilson Air (great FBO, BTW), with a freak snowstorm outside. The line guy likes mine the...
Forum: Alternative Engines 01-15-2019, 07:30 AM
Replies: 207
Views: 25,784
Posted By DanH
Was the old unit operational or broken?

Was the old unit operational or broken?
Forum: Reviews 01-15-2019, 07:19 AM
Replies: 11
Views: 608
Posted By DanH
Which adhesive does Scott like? Third, fourth,...

Which adhesive does Scott like?



Third, fourth, fifth photos:

http://www.vansairforce.com/community/showpost.php?p=693394&postcount=68
Forum: VAF Classifieds (posts in here deleted after 30 days) 01-14-2019, 07:41 AM
Replies: 2
Views: 794
Posted By DanH
No one wants heavy duty legs? Sure would look...

No one wants heavy duty legs? Sure would look good with some fat tires.
Forum: VAF Classifieds (posts in here deleted after 30 days) 01-14-2019, 07:36 AM
Replies: 1
Views: 572
Posted By DanH
New 3-Blade MT Propeller

Brand new MTV-12-B/183-59b, S/No.: #181506, in original, unopened MT shipping crate. White three-blade hydraulic constant speed propeller, complete with P-469-2-A spinner assembly, same as sold by...
Forum: Glass Cockpit 01-13-2019, 08:42 AM
Replies: 2
Views: 290
Posted By DanH
It's like most things. So far, XM weather seems...

It's like most things. So far, XM weather seems to be a superior product. Although I too would love to see a subscription cost reduction, I'm willing to pay the tab for now.

ADS-B in has an...
Forum: Alternative Engines 01-13-2019, 08:25 AM
Replies: 207
Views: 25,784
Posted By DanH
Charlie, let's have some fun. Imagine you're...

Charlie, let's have some fun.

Imagine you're driving your Jeep along a jungle trail, when you come to a piranha-infested river. The helpful natives have erected a bridge. You must decide. Is it...
Forum: Electrical Systems 01-12-2019, 07:02 AM
Replies: 16
Views: 673
Posted By DanH
What Charlie and Walt said. Two switches,...

What Charlie and Walt said. Two switches, physically separated or different. You want to be able to kill the master while bouncing around inside a cloud at night.

And label them "Master" and...
Forum: Alternative Engines 01-11-2019, 08:10 PM
Replies: 207
Views: 25,784
Posted By DanH
One more...

One more time.

https://www.danhorton.net/VAF/Honda%201.8L/One%20More%20Time.JPG

The tubes marked in red have nothing to do with triangulating points A and B. They support the gear tube, and rely...
Forum: RV General Discussion/News 01-11-2019, 09:24 AM
Replies: 18
Views: 2,175
Posted By DanH
Check out slide 12: These photos illustrate an...

Check out slide 12:

These photos illustrate an improper maintenance action caused when
the airplanes airworthiness certificate was relocated. The attach screw
penetrated the power cables. The FAA...
Forum: RV Building Tips/Techniques 01-11-2019, 07:23 AM
Replies: 7
Views: 618
Posted By DanH
There is no set schedule. Early tail assembly is...

There is no set schedule. Early tail assembly is a good time for a skills check, before moving into expensive parts. Most builders should schedule an inspection after installation of engine,...
Forum: Alternative Engines 01-10-2019, 09:07 AM
Replies: 207
Views: 25,784
Posted By DanH
Here is a good primer for structural concepts. ...

Here is a good primer for structural concepts. You can buy it at all the usual places:

https://www.amazon.com/Structures-Things-Dont-Fall-Down-ebook/dp/B009G1PHP2

Have you studied similar...
Forum: RV-3 01-10-2019, 06:56 AM
Replies: 13
Views: 680
Posted By DanH
So switch to one-piece gear, requiring outboard...

So switch to one-piece gear, requiring outboard structure only.
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 01-10-2019, 06:55 AM
Replies: 15
Views: 1,351
Posted By DanH
Yeah "Connection Timed Out", on both home and...

Yeah "Connection Timed Out", on both home and office computers, which are different ISPs.
Forum: RV-3 01-09-2019, 10:11 PM
Replies: 13
Views: 680
Posted By DanH
Ok, so a new gear tower structure for an RV-3...

Ok, so a new gear tower structure for an RV-3 would put the nuts on the bottom. There, fixed.

No more bent firewalls. No more cracked mount tubes. No more wheels that wobble and wiggle and shimmy...
Forum: Alternative Engines 01-09-2019, 09:46 PM
Replies: 207
Views: 25,784
Posted By DanH
I assume you mean "...comfortable with adding...

I assume you mean "...comfortable with adding just A-B, but not A-G and B-H to the structure."



Resize them to 800 pixels wide, 1000 max, before uploading to Halie, then insert before the link...
Forum: RV General Discussion/News 01-09-2019, 10:58 AM
Replies: 22
Views: 3,876
Posted By DanH
Definitely. It's just a static display. Expect...

Definitely. It's just a static display. Expect fee to be a negotiation, ie, they'll ask what you want, you start high, they say it's too much, yada, yada. If shooting for a national account, your...
Forum: RV General Discussion/News 01-09-2019, 09:10 AM
Replies: 22
Views: 3,876
Posted By DanH
How did you get the gig? I've done two of these,...

How did you get the gig?

I've done two of these, one with my L-4 (for a local clothing store's billboard campaign), and another with the JN-4C (article illustration for a Wall Street magazine). The...
Forum: RV-14 01-07-2019, 03:44 PM
Replies: 13
Views: 1,025
Posted By DanH
Forget grounding to the mount. Run one of...

Forget grounding to the mount. Run one of these...

http://www.bandc.aero/braidedbondingstrap.aspx

...from the engine case ground point (on the right rear) directly to a firewall mounted forest of...
Forum: RV Building Tips/Techniques 01-07-2019, 11:18 AM
Replies: 11
Views: 698
Posted By DanH
That is what you see on the Kitfox firewall in...

That is what you see on the Kitfox firewall in the previous photo.

Melt point of fiberglass fabric is fairly high (2100F ballpark, IIRC), but the rate of heat transfer will go up dramatically when...
Forum: RV Building Tips/Techniques 01-07-2019, 10:17 AM
Replies: 11
Views: 698
Posted By DanH
Yes, but 0.010" is exactly five times heavier,...

Yes, but 0.010" is exactly five times heavier, and provides no additional fire resistance.



Aluminum will work as a top sheet only if the insulation is intended for comfort purposes during normal...
Forum: Painting your RV 01-07-2019, 09:47 AM
Replies: 5
Views: 477
Posted By DanH
If you have the facilities and intend to do your...

If you have the facilities and intend to do your own paint, yes, painting as you go is sensible.
Forum: Alternative Engines 01-07-2019, 09:25 AM
Replies: 207
Views: 25,784
Posted By DanH
I know. That's why I did not comment on the...

I know. That's why I did not comment on the upper mounts. All comments dealt with the lower mounts and gear tube structure, which appear to be the same in all photos.



Proposed tube A-B, if...
Forum: Alternative Engines 01-06-2019, 12:23 PM
Replies: 207
Views: 25,784
Posted By DanH
Sure, plenty of similar examples. Recall I asked...

Sure, plenty of similar examples. Recall I asked (the other) Charlie to show us what he was using for models.

Here's the thing; good triangulation is more about stiffness than strength. A...
Forum: Alternative Engines 01-06-2019, 10:35 AM
Replies: 207
Views: 25,784
Posted By DanH
Hey, I've built at least one poorly designed...

Hey, I've built at least one poorly designed engine mount. Those are the lessons that stick the best.



Let's take a look. Got a link?



Which brings us to the crux of the problem. Using two...
Forum: RV General Discussion/News 01-05-2019, 05:58 AM
Replies: 20
Views: 2,674
Posted By DanH
"Failure to set a high standard for...

"Failure to set a high standard for craftsmanship" is the most common, probably more so than the sum of all other failures.
Forum: Alternative Engines 01-04-2019, 12:09 PM
Replies: 207
Views: 25,784
Posted By DanH
Charlie, that mount needs serious review. ...

Charlie, that mount needs serious review. Please, hire an engineer.
Forum: RV-8/8A 01-04-2019, 11:55 AM
Replies: 50
Views: 12,055
Posted By DanH
Sorry brother, but see previous note regarding...

Sorry brother, but see previous note regarding bandaids and bolt-on speed. ;)
Forum: RV-8/8A 01-03-2019, 03:12 PM
Replies: 50
Views: 12,055
Posted By DanH
Yer' welcome, and I think your feeling hits...

Yer' welcome, and I think your feeling hits squarely on the truth of the matter.

All good choices are based on reasoned compromise. My reasoning was that I could go faster, cheaper, via drag...
Forum: RV-8/8A 01-03-2019, 09:43 AM
Replies: 50
Views: 12,055
Posted By DanH
Larry, first suggestion is to think in terms of...

Larry, first suggestion is to think in terms of building a system. Whatever individual modifications you might make should be considered in a system context. Bandaids only go so far, and real...
Forum: Tools 12-31-2018, 02:32 PM
Replies: 8
Views: 864
Posted By DanH
I have an original 1918 "Dykes Automobile And...

I have an original 1918 "Dykes Automobile And Gasoline Engine Encyclopedia".

You can still download it in PDF. If you're a gearhead, block out most of your...
Forum: RV Building Tips/Techniques 12-31-2018, 08:06 AM
Replies: 20
Views: 1,422
Posted By DanH
Not much excuse for lack of temperature data. An...

Not much excuse for lack of temperature data. An ordinary LM34AH temperature sensor can be placed almost anywhere...hanging free, glued directly to a surface with thermally conductive epoxy, or...
Forum: RV Building Tips/Techniques 12-30-2018, 07:30 AM
Replies: 20
Views: 1,422
Posted By DanH
Amazing what the printers can do. Did you record...

Amazing what the printers can do.

Did you record board temperature before and after?
Forum: RV General Discussion/News 12-29-2018, 11:59 PM
Replies: 11
Views: 666
Posted By DanH
http://www.vansairforce.com/community/showthread.p...

http://www.vansairforce.com/community/showthread.php?p=1309048&highlight=ADS-B#post1309048
Forum: RV General Discussion/News 12-28-2018, 06:23 PM
Replies: 6
Views: 664
Posted By DanH
Short...

Short version:

http://www.vansairforce.com/community/showpost.php?p=476353&postcount=20
Forum: RV-10 12-28-2018, 09:33 AM
Replies: 38
Views: 2,565
Posted By DanH
Is the bottom edge of the windshield set in Sika...

Is the bottom edge of the windshield set in Sika under the fiberglass fairing overlay?
Forum: RV-12/RV-12iS 12-27-2018, 06:50 AM
Replies: 10
Views: 1,209
Posted By DanH
Bill, I'm slowly installing a custom made 4-port...

Bill, I'm slowly installing a custom made 4-port system on a 912S in an S-7. Might have a report for you in a few months.
Forum: Glass Cockpit 12-26-2018, 05:04 PM
Replies: 46
Views: 4,881
Posted By DanH
https://www.danhorton.net/VAF/Red%20Cube%20Junk/Sc...

https://www.danhorton.net/VAF/Red%20Cube%20Junk/ScreenHunter_426%20Dec.%2025%2022.08.jpg
Forum: Glass Cockpit 12-25-2018, 04:06 PM
Replies: 46
Views: 4,881
Posted By DanH
I'm not qualified to render an opinion on...

I'm not qualified to render an opinion on electronics quality, but the red cubes's circuit board is potted in such a way that vibration should not hurt...
Forum: RV-10 12-25-2018, 10:21 AM
Replies: 35
Views: 7,298
Posted By DanH
Does anyone have a document or link detailing...

Does anyone have a document or link detailing mechanical properties for Lord 7545 A/E? Tensile, shear, modulus, cured Shore, etc? I can't find the info on the Lord site.
Forum: RV-10 12-25-2018, 07:33 AM
Replies: 38
Views: 2,565
Posted By DanH
No visible Sika band around the windshield in...

No visible Sika band around the windshield in this photo. Paint extends over the Sika, or is the windshield bonded in with a hard adhesive?
Forum: RV-7/7A 12-23-2018, 06:03 PM
Replies: 3
Views: 497
Posted By DanH
Same stroke, thus width as the 360.

Same stroke, thus width as the 360.
Forum: RV General Discussion/News 12-23-2018, 10:39 AM
Replies: 312
Views: 121,505
Posted By DanH
You're both right, and it wasn't a cheap shot. ...

You're both right, and it wasn't a cheap shot. Technically speaking, it's not a fancy ignition system (a Ford module with a sub-$200 timing controller), and it is 23 degree fixed timing when running...
Forum: Traditional Aircraft Engines 12-23-2018, 08:57 AM
Replies: 230
Views: 113,567
Posted By DanH
Did you happen to note the name of the referenced...

Did you happen to note the name of the referenced AIAA paper?

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19980214913.pdf



Yes, tufts are cheap and easy. Poor external shape around a...
Forum: RV General Discussion/News 12-23-2018, 07:40 AM
Replies: 8
Views: 652
Posted By DanH
With either fixed or floating receptacles, the...

With either fixed or floating receptacles, the core screws in and out for depth adjustment. There is no lateral adjustment which can be locked after installation.



No reason to be concerned if the...
Forum: My RV Build Project 12-22-2018, 11:12 AM
Replies: 10
Views: 2,273
Posted By DanH
For $2500 difference? New kit. Less hassle, and...

For $2500 difference? New kit. Less hassle, and you'll get it back in resale.
Forum: RV General Discussion/News 12-22-2018, 10:57 AM
Replies: 312
Views: 121,505
Posted By DanH
I'm gonna put this one up just because I like the...

I'm gonna put this one up just because I like the numbers. Groundspeed is nice (221 knots) but check the TAS vs fuel flow, 192 at 9.8. Settings are simple; WOT, adjust RPM for an indicated 65%,...
Forum: Traditional Aircraft Engines 12-21-2018, 07:27 PM
Replies: 230
Views: 113,567
Posted By DanH
Thank you for your comment.

Thank you for your comment.
Forum: Traditional Aircraft Engines 12-21-2018, 08:39 AM
Replies: 230
Views: 113,567
Posted By DanH
Sure. Small passage connecting volumes with high...

Sure. Small passage connecting volumes with high deltaP = high velocity. When you were building and we were talking about wraps (wow, where does the time go?), our mutual belief was that promoting...
Forum: RV General Discussion/News 12-21-2018, 07:36 AM
Replies: 11
Views: 1,048
Posted By DanH
(1) Stainless firewall, paint on cabin side,...

(1) Stainless firewall, paint on cabin side, nothing on engine side: given an engine compartment fire per FAA standard, the cabin-side paint will become a fire transfer mechanism. I would expect...
Forum: Fiberglass 12-20-2018, 03:36 PM
Replies: 12
Views: 714
Posted By DanH
Or gravely in error. Micro is not a pinhole...

Or gravely in error. Micro is not a pinhole filler. It's for shape and contour. And yes, there are alternatives.

Just remember the Chinese menu. Fast, cheap, good, pick any two.
Forum: Fiberglass 12-20-2018, 07:47 AM
Replies: 12
Views: 714
Posted By DanH
The K36 should cover. DPLF wet sands just...

The K36 should cover.

DPLF wet sands just fine, so you can kill orange peel, roughness, or dirt in a primer coat when necessary. If you feel like the splotch surface texture needs improvement...
Forum: Traditional Aircraft Engines 12-19-2018, 06:48 PM
Replies: 230
Views: 113,567
Posted By DanH
It says inlet velocity/freestream velocity, or...

It says inlet velocity/freestream velocity, or stream tube area/inlet area, are numerically low ratio.

Velocity, on the other hand, varies a lot at different points in the system.



There are only...
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