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Search: Posts Made By: DanH
Forum: RV-10 Today, 08:38 AM
Replies: 11
Views: 702
Posted By DanH
Yeah, but again, it's probably more trouble than...

Yeah, but again, it's probably more trouble than just moving the offending avionics, and you won't have to explain it to every future inspector, amateur or pro.
Forum: Trip Write-ups Today, 08:34 AM
Replies: 2
Views: 287
Posted By DanH
Pete, I'll bet when you were growing up, no one...

Pete, I'll bet when you were growing up, no one had any trouble recognizing whose kid you were....not if they knew your mom. You really, really look like her!
Forum: Safety Today, 08:23 AM
Replies: 7
Views: 581
Posted By DanH
The -6 pump inlet fitting is steel, and the...

The -6 pump inlet fitting is steel, and the elastomeric line feeding it should have steel ends and nuts. I suspect that use of standard AN torque tables may contribute to loosening. Consider, for...
Forum: Traditional Aircraft Engines Yesterday, 09:01 PM
Replies: 214
Views: 108,554
Posted By DanH
Large in comparison to the stream tube, i.e....

Large in comparison to the stream tube, i.e. stream tube area/inlet area = <0.4 Another definition could be inlet velocity/freestream velocity = <0.4



I would caution readers that your case is...
Forum: Traditional Aircraft Engines Yesterday, 02:36 PM
Replies: 214
Views: 108,554
Posted By DanH
Efficient in what way Jim ? External drag? ...

Efficient in what way Jim ? External drag? Pressure recovery? Something else?

BTW, the inlets tested in AIAA 80-1872R are neither round or mail slot.



That would be NASA CR3405. The data...
Forum: Traditional Aircraft Engines 12-14-2018, 07:16 PM
Replies: 214
Views: 108,554
Posted By DanH
Thank you sir, but clearly I didn't invent this...

Thank you sir, but clearly I didn't invent this stuff. Being the Forrest Gump of aviation, I was just lucky enough to be in the right time/place for a very good CFD guy to tell me "GA does it...
Forum: Traditional Aircraft Engines 12-14-2018, 04:23 PM
Replies: 214
Views: 108,554
Posted By DanH
Returning to the propeller's contribution to...

Returning to the propeller's contribution to climb cooling, here's a paper some readers will find interesting:

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

In the past I've...
Forum: Traditional Aircraft Engines 12-14-2018, 11:42 AM
Replies: 34
Views: 5,377
Posted By DanH
Example of the eccentricity due to sag. You can...

Example of the eccentricity due to sag. You can see how there is very little room remaining for the center spacer and gel bag, and the raised ribs can't...
Forum: Safety 12-14-2018, 10:04 AM
Replies: 20
Views: 1,031
Posted By DanH
A few months back I managed to run a finger pad...

A few months back I managed to run a finger pad between the chuck key and the chuck teeth on a 3/8 drill. Yep, bumped the trigger while tightening the chuck. Chews the meat real, real, real well.
Forum: Traditional Aircraft Engines 12-14-2018, 07:56 AM
Replies: 34
Views: 5,377
Posted By DanH
When the inner spacers pinch the gel bag against...

When the inner spacers pinch the gel bag against the inside of the isolator rings, the ends of the bag will be peeled back if the engine moves in the mounts. If I had to pick (caution, opinion), I'd...
Forum: RV-10 12-13-2018, 10:05 PM
Replies: 11
Views: 702
Posted By DanH
Yeah, it could be done. However, I think I'd...

Yeah, it could be done. However, I think I'd just move the offending avionics to someplace accessible. It's a one-time PITA.
Forum: RV General Discussion/News 12-13-2018, 06:20 PM
Replies: 14
Views: 931
Posted By DanH
Wipe it with a warm cat. Works every time.

Wipe it with a warm cat. Works every time.
Forum: ADS-B 12-13-2018, 01:34 PM
Replies: 0
Views: 186
Posted By DanH
Using the Correct PAPR Page For Rebates

Flew the required maneuvers in rule airspace yesterday. When I got back to the office I Googled for the ADS-B PAPR (Public ADS-B Performance Report) webpage and filed a request.

Got a very clean...
Forum: Traditional Aircraft Engines 12-13-2018, 07:52 AM
Replies: 34
Views: 5,377
Posted By DanH
Tough crowd. We trim and deburr RV parts, don't...

Tough crowd. We trim and deburr RV parts, don't we?
Forum: Safety 12-13-2018, 07:42 AM
Replies: 10
Views: 580
Posted By DanH
Ya better check 'em, even if you don't send them...

Ya better check 'em, even if you don't send them in. As far as I'm concerned, Slicks get opened for a look at every annual.

As for this particular SB, the problem is nothing new. These photos are...
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-12-2018, 09:25 PM
Replies: 14
Views: 2,982
Posted By DanH
Funny you should mention that. It was a great...

Funny you should mention that. It was a great promotion, and yes, I did sell the airplane ;)

https://www.danhorton.net/VAF/Is%20this%20guy%20trying%20to%20scam/Used%20Airplane%20Promotion.jpg
Forum: Traditional Aircraft Engines 12-12-2018, 07:30 PM
Replies: 34
Views: 5,377
Posted By DanH
Previously.. Ok, the 50016-08 acro mounts are...

Previously..



Ok, the 50016-08 acro mounts are now installed, and I got an opportunity to get in three hours today over to Baton Rouge and back.

Initial impression: Vibration transmission is...
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-12-2018, 05:44 PM
Replies: 14
Views: 2,982
Posted By DanH
I'm so ashamed. Nobody wants to buy mine :o

I'm so ashamed.

Nobody wants to buy mine :o
Forum: RV General Discussion/News 12-12-2018, 04:51 PM
Replies: 16
Views: 749
Posted By DanH
No........

No........
Forum: RV General Discussion/News 12-12-2018, 06:39 AM
Replies: 10
Views: 797
Posted By DanH
I am darn glad you have joined us. ...which is...

I am darn glad you have joined us.



...which is exactly what Lycoming lists as minimum fuel flow for rated power.
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-11-2018, 03:37 PM
Replies: 3
Views: 658
Posted By DanH
The FedEx man visited today. Who wants one, no...

The FedEx man visited today. Who wants one, no waiting?

https://www.danhorton.net/Misc/Kirks%20MT.jpg
Forum: RV General Discussion/News 12-11-2018, 11:26 AM
Replies: 3
Views: 284
Posted By DanH
Probably no speed difference, but I would expect...

Probably no speed difference, but I would expect a cooling difference, as the round opening normally behind the spinner would pressurize the lower cowl.
Forum: Traditional Aircraft Engines 12-10-2018, 08:09 PM
Replies: 20
Views: 1,312
Posted By DanH
Not that. A vernatherm blocks an oil cooler...

Not that.

A vernatherm blocks an oil cooler bypass when the oil reaches (ballpark) 180F, forcing all flow to the cooler. A failed vernatherm simply allows oil to bypass the cooler, the result being...
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-10-2018, 03:09 PM
Replies: 8
Views: 968
Posted By DanH
They would be fine for any 4, 6, or 8 cyl engine,...

They would be fine for any 4, 6, or 8 cyl engine, of any size, and compression ratio.

The software to enter desired timing maps is free. Each module stores two maps, switchable in flight. If a...
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-10-2018, 01:02 PM
Replies: 3
Views: 658
Posted By DanH
Any offers? Worst case, you help price it. PM...

Any offers? Worst case, you help price it. PM or email please.
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-10-2018, 01:00 PM
Replies: 8
Views: 968
Posted By DanH
Price drop... $199 for everything.

Price drop...

$199 for everything.
Forum: Trip Write-ups 12-10-2018, 12:16 PM
Replies: 16
Views: 1,981
Posted By DanH
Ahhh, but those are not Halos...

Ahhh, but those are not Halos...
Forum: RV-10 12-10-2018, 08:56 AM
Replies: 13
Views: 711
Posted By DanH
Are there any recent certified aluminum...

Are there any recent certified aluminum designs?

Ya'll do as you please. I've seen mylar coated plastic bubble wrap, and pink Dow Corning styrofoam sheet on the cabin side of...
Forum: RV-10 12-09-2018, 10:03 PM
Replies: 13
Views: 711
Posted By DanH
Yep, there are plenty like it. The kind that...

Yep, there are plenty like it.



The kind that burns.

Here is accident report LAX07LA263, a PA22-150 with failed muffler.

According to the pilot, he performed another run-up and, finding...
Forum: RV-10 12-09-2018, 12:46 PM
Replies: 13
Views: 711
Posted By DanH
Some of my experiments looked at rate of heat...

Some of my experiments looked at rate of heat rise and maximum heating for objects on the cabin side. I also looked at the possibility of point source ignition, and long term readers will recall a...
Forum: RV-10 12-09-2018, 09:47 AM
Replies: 13
Views: 711
Posted By DanH
Thankfully. Quick review. The usual vendor...

Thankfully.

Quick review. The usual vendor claim is "Our materials all pass FAR 25.853(A) - 12 second vertical burn." or similar. That's the standard for upholstery and cabin sidewalls in...
Forum: Traditional Aircraft Engines 12-08-2018, 06:51 AM
Replies: 20
Views: 1,312
Posted By DanH
http://www.vansairforce.com/community/showthread.p...

http://www.vansairforce.com/community/showthread.php?t=45548
Forum: Propellers 12-07-2018, 08:21 PM
Replies: 18
Views: 1,370
Posted By DanH
New 3-blade MT...

New 3-blade MT here:

http://www.vansairforce.com/community/showpost.php?p=1306990&postcount=1
Forum: RV General Discussion/News 12-07-2018, 06:10 PM
Replies: 16
Views: 749
Posted By DanH
A small Lycoming circulates oil at a rate of...

A small Lycoming circulates oil at a rate of about 7 gallons per minute at 2700. The pump is positive displacement, so 1000 RPM should be about 2.6 gallons per minute, which happens to be about 2.6...
Forum: Midwest 12-06-2018, 05:24 PM
Replies: 11
Views: 1,879
Posted By DanH
Sometimes there is little difference between a...

Sometimes there is little difference between a scam and a law.
Forum: Electronic Ignition Systems 12-06-2018, 05:21 PM
Replies: 53
Views: 5,216
Posted By DanH
You're suggesting the ability to program timing...

You're suggesting the ability to program timing retard at WOT as compared to the typical aircraft magneto's fixed compromise timing?

One of many conflations of spark generation with spark timing...
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-05-2018, 11:06 PM
Replies: 8
Views: 968
Posted By DanH
Hotter spark burns fuel more efficiently, so...

Hotter spark burns fuel more efficiently, so you'll get 10% more power, and 15% more MPG, and be irresistible to attractive women.

Naaa, that's all bull.

It's just a good DIY ignition system for...
Forum: RV General Discussion/News 12-05-2018, 03:07 PM
Replies: 17
Views: 1,838
Posted By DanH
[QUOTE=jeffkersey;1307166]Here's a picture with a...

[QUOTE=jeffkersey;1307166]Here's a picture with a measuring tape for scale. What do you think Dan?[QUOTE]

The hole is either 14mm (0.55") or 18mm, so it should go right in.
Forum: RV General Discussion/News 12-05-2018, 12:55 PM
Replies: 17
Views: 1,838
Posted By DanH
I think the plan is to just tape it to a coat...

I think the plan is to just tape it to a coat hanger wire so when inserted through a plug hole, it points back toward the head.
Forum: RV General Discussion/News 12-05-2018, 11:30 AM
Replies: 17
Views: 1,838
Posted By DanH
That one is interesting. Note available...

That one is interesting. Note available resolution is 1280 x 720, rather than the VA-400's 640 x 480. The VA-400 is nice, but low-res images can be grainy, and fool you into thinking you're seeing...
Forum: RV General Discussion/News 12-05-2018, 08:46 AM
Replies: 17
Views: 1,838
Posted By DanH
Jeff, I see it has a supplied mirror, but will...

Jeff, I see it has a supplied mirror, but will the "semi-rigid" cable bend back on itself 180 degrees in a small enough loop to pass through a spark plug hole? It would be nice if the camera could...
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-04-2018, 06:26 PM
Replies: 3
Views: 658
Posted By DanH
New MTV-12-B/183-59B Prop

My buddy Kirk has a new prop inbound from MT, and it turns out he is not going to use it. It's an MTV-12-B/183-59B three-blade for an (I)O-360, with spinner, same as from the...
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-04-2018, 04:32 PM
Replies: 8
Views: 968
Posted By DanH
Sorry, 4, 6, or 8 cyl only.

Sorry, 4, 6, or 8 cyl only.
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-04-2018, 02:01 PM
Replies: 8
Views: 968
Posted By DanH
Two Megajolt/E Ignition Controllers

https://www.danhorton.net/Misc/MegajoltE.JPG

Two Megajolt/E ignition controllers, with new plugs/pins, plus the necessary USB-to-serial adapter to connect to your laptop. Free shipping in the...
Forum: Electronic Ignition Systems 12-04-2018, 01:12 PM
Replies: 53
Views: 5,216
Posted By DanH
I'll venture Klaus wouldn't write the same...

I'll venture Klaus wouldn't write the same article today.
Forum: RV General Discussion/News 12-04-2018, 10:07 AM
Replies: 36
Views: 2,740
Posted By DanH
Bill, how much composite work had you done prior...

Bill, how much composite work had you done prior to technical research on diffusers, designing a plenum, building molds, and then teaching yourself the resin infusion...
Forum: RV General Discussion/News 12-03-2018, 06:55 PM
Replies: 36
Views: 2,740
Posted By DanH
Oooo, that is pretty. Look at Bill's diffuser...

Oooo, that is pretty. Look at Bill's diffuser shapes, and the cored layup, and the flange attachment, and the.....

Whoops, sorry Krea, babbling again. The blue paint is nice too. ;)
Forum: RV General Discussion/News 12-03-2018, 02:32 PM
Replies: 36
Views: 2,740
Posted By DanH
For goodness sakes...just build one!

For goodness sakes...just build one!
Forum: RV General Discussion/News 12-03-2018, 11:24 AM
Replies: 9
Views: 500
Posted By DanH
What seals and seal kit are we talking about here?

What seals and seal kit are we talking about here?
Forum: Electronic Ignition Systems 12-03-2018, 11:18 AM
Replies: 53
Views: 5,216
Posted By DanH
Just for fun.... Previously I said: How about...

Just for fun....

Previously I said:



How about a magneto with solid state switching and programmable advance/retard, capable of lighting off 13 lbs of nitromethane fuel mix per...
Forum: RV-8/8A 12-03-2018, 08:35 AM
Replies: 23
Views: 3,349
Posted By DanH
Good -8 rates with suitable tailwheel and time in...

Good -8 rates with suitable tailwheel and time in type are around $1100. Mine is currently just over 1 AMU.
Forum: Electronic Ignition Systems 12-03-2018, 07:19 AM
Replies: 53
Views: 5,216
Posted By DanH
Jim, if we assume identical timing, best power...

Jim, if we assume identical timing, best power mixture, and good mags, I think any peak HP difference will be in the noise.

Setting timing advance aside, a crank triggered EI may deliver slightly...
Forum: RV-10 12-02-2018, 12:22 PM
Replies: 11
Views: 1,015
Posted By DanH
Larry, if you search a little you'll find a lot...

Larry, if you search a little you'll find a lot of previous discussion about drilling holes in a stick, and the concern for stress concentration. Simple answer is to fire up a TIG and weld a diamond...
Forum: Electronic Ignition Systems 12-02-2018, 12:16 PM
Replies: 53
Views: 5,216
Posted By DanH
Returning to reality... When EI is discussed,...

Returning to reality...

When EI is discussed, all too often folks conflate two separate subjects, (1) the methods of producing spark, and (2) the timing of that spark. Without separating the two...
Forum: Electronic Ignition Systems 12-02-2018, 08:57 AM
Replies: 53
Views: 5,216
Posted By DanH
Physician heal thyself.

Physician heal thyself.
Forum: RV General Discussion/News 12-01-2018, 07:51 AM
Replies: 17
Views: 1,210
Posted By DanH
Steve, put your engineer eye to the mechanical...

Steve, put your engineer eye to the mechanical specs. Not sure it is appropriate for primary structure, and I'm having trouble with the modulus unit conversions.
Forum: VAF Classifieds (posts in here deleted after 30 days) 12-01-2018, 07:19 AM
Replies: 12
Views: 1,427
Posted By DanH
They're too far advanced.

They're too far advanced.
Forum: RV General Discussion/News 11-30-2018, 01:00 PM
Replies: 17
Views: 1,210
Posted By DanH
You'll still need reflective material near the...

You'll still need reflective material near the exhausts, preferably over an insulator.

For the plenum lid, the HTR I linked has a Tg about double that of West, higher than a lid will typically...
Forum: RV General Discussion/News 11-30-2018, 08:48 AM
Replies: 17
Views: 1,210
Posted By DanH
Good numbers for a room temperature cure epoxy. ...

Good numbers for a room temperature cure epoxy. I have some exit parts running very close to a hot tailpipe without issue.

https://www.aircraftspruce.com/catalog/cmpages/htr212resin.php

West 105...
Forum: Traditional Aircraft Engines 11-28-2018, 01:56 PM
Replies: 8
Views: 1,050
Posted By DanH
Bundled all the time.

Bundled all the time.
Forum: RV-9/9A 11-27-2018, 09:24 AM
Replies: 41
Views: 4,446
Posted By DanH
Kevin is awesome. The three-leg groundspeed...

Kevin is awesome.



The three-leg groundspeed and track method is more accurate, and you don't have to wait for a calm day. Actually, it calculates the wind too. Just set altitude hold and...
Forum: RV General Discussion/News 11-27-2018, 07:48 AM
Replies: 194
Views: 70,639
Posted By DanH
Gee, it's sorta like Dave's (which by the way, is...

Gee, it's sorta like Dave's (which by the way, is fabulous).

https://www.danhorton.net/Misc/Kitfox.JPG
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