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Search: Posts Made By: DanH
Forum: Trip Write-ups Today, 08:16 AM
Replies: 2
Views: 399
Posted By DanH
A Mercedes-Maybach? In Ajo? I assume you...

A Mercedes-Maybach? In Ajo? I assume you spotted cameras on arrival.

Lacking cameras, a Maybach and two camping RVs screams "drug haul", and I'd probably do a 180 on the runway...
Forum: RV General Discussion/News Today, 07:53 AM
Replies: 28
Views: 1,731
Posted By DanH
Put me in the bin with Scott. I absolutely agree...

Put me in the bin with Scott. I absolutely agree that quite a few builders do a poor first condition inspection...but no, we don't need a new rule mandating A&P involvement.

Let's not kid...
Forum: GPS Yesterday, 01:29 PM
Replies: 3
Views: 142
Posted By DanH
Popped the case (10 screws, no big deal) to take...

Popped the case (10 screws, no big deal) to take a look at the power/data's socket connections to the board. I could only access one side without risk, but it looks pretty robust to me...five...
Forum: GPS 01-22-2022, 07:28 PM
Replies: 3
Views: 142
Posted By DanH
696 Power/Data Plug Issue

I seem to have a connection problem at the 4-pin power/data plug on my 696. Anyone seen this before?

Looks like the trick is determining if the intermittent connection is in the plug, the socket,...
Forum: RV General Discussion/News 01-22-2022, 10:29 AM
Replies: 28
Ice
Views: 2,398
Posted By DanH
...and let's note the fellow was asking for...

...and let's note the fellow was asking for advice, the first step toward safe flying.
Forum: Fiberglass 01-22-2022, 07:04 AM
Replies: 7
Views: 461
Posted By DanH
Coffee can and a small measuring cup. Pretty...

Coffee can and a small measuring cup. Pretty easy to settle on how many cups per 100 grams of resin, or whatever recipe you like.

Pouring micro tends to put too much of it in the air.
Forum: Fiberglass 01-20-2022, 07:29 AM
Replies: 14
Views: 1,224
Posted By DanH
I've never seen anything like that...except when...

I've never seen anything like that...except when warming wet micro to make it flow, rarely a good idea.

Micro is for contour. Contouring (shaping ) should be long gone done before any applications...
Forum: RV-8/8A 01-20-2022, 06:48 AM
Replies: 22
Views: 999
Posted By DanH
What Chris said. Like this:

What Chris said. Like this:
Forum: RV-14 01-19-2022, 10:11 AM
Replies: 6
Views: 489
Posted By DanH
Just to clarify...the "EXP177" is the 210 HP...

Just to clarify...the "EXP177" is the 210 HP version with a one-piece intake plenum/oil sump?
Forum: Alternative Engines 01-18-2022, 06:39 AM
Replies: 36
Views: 3,671
Posted By DanH
I've lost my mind... Lately I've spent a lot of...

I've lost my mind...

Lately I've spent a lot of time designing a hangar home. So here's a nice video with cool engine stuff and what am I looking at? Check out the interesting asymmetric truss...
Forum: RV General Discussion/News 01-17-2022, 07:56 PM
Replies: 16
Views: 2,184
Posted By DanH
Flew it 45 minutes, then started taking it...

Flew it 45 minutes, then started taking it apart...annual time.

On the list for this year, R&R a corroded throttle/mixture cable bracket. Radiant heating baked off all the paint. High temperature...
Forum: Traditional Aircraft Engines 01-16-2022, 08:31 AM
Replies: 2
Views: 509
Posted By DanH
All the original 390's built at Barrett were...

All the original 390's built at Barrett were angle valve 360 models with bored case spigots and 580 jugs. I don't know all the case mod details, but I think the bolt pattern is the same. Call...
Forum: Electronic Ignition Systems 01-14-2022, 12:45 PM
Replies: 104
Views: 33,949
Posted By DanH
Jimmy, perhaps you might download Lycoming...

Jimmy, perhaps you might download Lycoming SI-1443R.

This issue is not that a variable timing EIS is available for the 390-D, but rather, how much is advance it allows. Way back when announced,...
Forum: Electronic Ignition Systems 01-13-2022, 08:57 PM
Replies: 104
Views: 33,949
Posted By DanH
Scott, confirm please. Your understanding is...

Scott, confirm please. Your understanding is that these Lycoming-branded units supplied with the 390 have a 28 degree maximum advance?
Forum: Propellers 01-12-2022, 06:50 PM
Replies: 83
Views: 7,654
Posted By DanH
Joe, a question please. Assume for a moment...

Joe, a question please.

Assume for a moment we're speaking strictly of the popular Hartzell compact hub with the BA aluminum blade. Further, set aside wear and potential failures to function. ...
Forum: RV-10 01-12-2022, 07:37 AM
Replies: 18
Views: 1,506
Posted By DanH
My compliments; any test is better than...

My compliments; any test is better than none.

That said, the FAA standard is 2000F over 25 sq inches. The specified heat flux is far more energy than can be applied with a handheld plumbing torch....
Forum: Traditional Aircraft Engines 01-11-2022, 07:27 AM
Replies: 11
Views: 829
Posted By DanH
Yes, with a caveat. You will get a pressure...

Yes, with a caveat. You will get a pressure indication. However, consider how both pressure and temperature vary throughout the system. I'd suggest using conventional measurement points for both,...
Forum: RV Building Tips/Techniques 01-10-2022, 08:48 PM
Replies: 24
Views: 2,419
Posted By DanH
Scott, given all the effort you've put into this,...

Scott, given all the effort you've put into this, consider reinforcing the door panel itself. An aluminum panel door with no rib(s) will surely bow outward due to internal cowl pressure. The result...
Forum: RV-8/8A 01-10-2022, 08:37 PM
Replies: 9
Views: 1,314
Posted By DanH
What Carl said. The whole deal only comes out...

What Carl said. The whole deal only comes out once a year, unless I mod something. Mighty handy to have a quick access.
-
Forum: Electrical Systems 01-09-2022, 07:20 PM
Replies: 20
Views: 3,812
Posted By DanH
Oh no, Kathy covered the fundamentals...metal box...

Oh no, Kathy covered the fundamentals...metal box inside the plastic case, 300F max exterior temperature.

Kathy, can you share construction details? Based on exterior dimensions, a half pound total...
Forum: Electrical Systems 01-09-2022, 01:54 PM
Replies: 20
Views: 3,812
Posted By DanH
Yes, that's obvious. I'll re-phrase. Both the...

Yes, that's obvious. I'll re-phrase.

Both the ETX900 and the ETX-900-VNT use the E-sized case. It appears the vented model is simply the standard plastic case with two hose fittings added to the...
Forum: RV Ongoing Maintenance Issues 01-09-2022, 07:02 AM
Replies: 4
Views: 868
Posted By DanH
Did you remove the screen inlet plug when you...

Did you remove the screen inlet plug when you replaced the sump screen?
-
Forum: Electrical Systems 01-09-2022, 06:02 AM
Replies: 20
Views: 3,812
Posted By DanH
The vented models are created by adding vent...

The vented models are created by adding vent outlets to the standard plastic case?
Forum: Traditional Aircraft Engines 01-08-2022, 07:47 AM
Replies: 112
Views: 11,449
Posted By DanH
System schematic, and viscosity valve...

System schematic, and viscosity valve information. Full control of oil flow requires a ball valve in the line from accessory case to cooler, the removal of the vernatherm (retain the cap of course),...
Forum: Traditional Aircraft Engines 01-08-2022, 07:44 AM
Replies: 42
Views: 62,123
Posted By DanH
New schematic, modified oil system for manual...

New schematic, modified oil system for manual control of oil flow through the cooler.

Allows complete blockage of all cooler flow in cold weather.

Guarantees max flow through the cooler in hot...
Forum: Traditional Aircraft Engines 01-07-2022, 07:38 PM
Replies: 112
Views: 11,449
Posted By DanH
Just a reminder...given a standard vernatherm...

Just a reminder...given a standard vernatherm system, the cooler always has some oil flow.

The vernatherm bypass hole is open when cold, so part of the oil goes through that bypass, and the rest...
Forum: Propellers 01-07-2022, 07:02 AM
Replies: 83
Views: 7,654
Posted By DanH
Yep, that's what I was asking. The blue looks a...

Yep, that's what I was asking. The blue looks a lot like heat coloration, and I was really surprised to see it. Glad to hear different!



Oh yes, please, please, please...
Forum: VAF Classifieds (posts in here deleted after 30 days) 01-07-2022, 06:54 AM
Replies: 3
Views: 249
Posted By DanH
https://awi-ami.com/4-1-exhaust

https://awi-ami.com/4-1-exhaust
Forum: RV-8/8A 01-06-2022, 07:58 PM
Replies: 10
Views: 1,016
Posted By DanH
Apparently some of the engine shops do the mod. ...

Apparently some of the engine shops do the mod. Ron Moring has one on his Sportsman. I'm gonna do it if I need to remove the sump. Hopefully that will be about 1000 hours from now.
Forum: RV Building Tips/Techniques 01-06-2022, 07:34 AM
Replies: 26
Views: 4,285
Posted By DanH
Yeah, that's the ticket. Get with Darwin or Ron...

Yeah, that's the ticket. Get with Darwin or Ron for little details.
Forum: RV-8/8A 01-06-2022, 07:25 AM
Replies: 10
Views: 1,016
Posted By DanH
At the fundamental level, a 119 is a 390C with an...

At the fundamental level, a 119 is a 390C with an Airflow Performance FM-200. It bolts up like any angle valve.

I would be unlikely to buy a kit intended for another model, in particular 14 parts...
Forum: RV-8/8A 01-05-2022, 07:54 AM
Replies: 32
Views: 10,271
Posted By DanH
I've told this story on myself before. Look...

I've told this story on myself before.

Look close at 5551, and compared to others you'll see a bit more space between door edge and opening edge, all around the door perimeter. The door closes...
Forum: Propellers 01-05-2022, 07:27 AM
Replies: 83
Views: 7,654
Posted By DanH
Joe, am I seeing the crack where marked? The...

Joe, am I seeing the crack where marked?

The blue coloration on the other race is interesting. Is that temperature related?

BTW, thanks for the posts. Keep 'em coming!
.
Forum: Fiberglass 01-05-2022, 07:13 AM
Replies: 13
Views: 955
Posted By DanH
Micro, cabo, and flox, your three reliable...

Micro, cabo, and flox, your three reliable friends. Mix and match to suit the task. Add one or all to mixed epoxy in proportions based on the desired result...you know, like "salt and pepper to...
Forum: Electronic Ignition Systems 01-04-2022, 11:00 AM
Replies: 23
Views: 1,247
Posted By DanH
Jan, that's the point about terminology. Don't...

Jan, that's the point about terminology. Don't think of it as "emergency" or "backup". It's simply the IGN2 supply battery.

Here's another way to look at it. It's common to see one big battery...
Forum: Electronic Ignition Systems 01-04-2022, 09:49 AM
Replies: 23
Views: 1,247
Posted By DanH
True. Most of us have voltage monitoring on an...

True.

Most of us have voltage monitoring on an EFIS or EIS, which covers the main battery and charging system. It's easy to wire a simple test system for the second battery (green below), just a...
Forum: Electronic Ignition Systems 01-04-2022, 08:07 AM
Replies: 23
Views: 1,247
Posted By DanH
Returning to topic.... It's funny how...

Returning to topic....



It's funny how terminology can change perception. Here the second battery is called an "emergency backup". It's a reasonable perception based on the wiring diagram in the...
Forum: RV Ongoing Maintenance Issues 01-03-2022, 09:24 AM
Replies: 32
Views: 2,002
Posted By DanH
Nope. In any sort of diagnosis, folks tend to...

Nope.

In any sort of diagnosis, folks tend to focus on a single item. In reality, the end result is more often the product of a series of factors, or multiple concurrent factors. In aviation,...
Forum: RV Ongoing Maintenance Issues 01-03-2022, 07:51 AM
Replies: 32
Views: 2,002
Posted By DanH
The standard relates to liquid leak paths, not...

The standard relates to liquid leak paths, not blisters.

The evidence says blister formation requires gasoline vapor as one of several factors. Fully cured polysulfide sealant is vapor permeable....
Forum: Propellers 01-02-2022, 06:50 PM
Replies: 83
Views: 7,654
Posted By DanH
Always possible!

Always possible!
Forum: RV Ongoing Maintenance Issues 01-02-2022, 03:12 PM
Replies: 32
Views: 2,002
Posted By DanH
It's not a wild theory. It's an aerospace...

It's not a wild theory. It's an aerospace standard, straight from AIR4069 Rev.A, reproduced below.

The rearmost rivet line, outside the tank, is fay and filet seal only. Apples and oranges. ...
Forum: Propellers 01-02-2022, 02:51 PM
Replies: 83
Views: 7,654
Posted By DanH
The mineral oil seeps out of it rather quickly. ...

The mineral oil seeps out of it rather quickly. So, load a new tube in the gun, grease the prop, place it on the shelf. Come back in a few months to find an oil puddle, and solids the gun won't...
Forum: Propellers 01-02-2022, 11:24 AM
Replies: 83
Views: 7,654
Posted By DanH
If so, good riddance.

If so, good riddance.
Forum: Alternative Engines 01-02-2022, 11:22 AM
Replies: 801
Views: 218,401
Posted By DanH
So apparently Russell's only blast cooling flow...

So apparently Russell's only blast cooling flow is via a tiny inlet for the PSRU.

In Charlie's case, the intercooler flow is drag accepted in trade for additional power. No argument here,...
Forum: RV Ongoing Maintenance Issues 01-02-2022, 10:24 AM
Replies: 32
Views: 2,002
Posted By DanH
The original thread, more or...

The original thread, more or less:

https://vansairforce.net/community/showthread.php?t=10187
Forum: Alternative Engines 01-02-2022, 08:48 AM
Replies: 801
Views: 218,401
Posted By DanH
Returning to in-cowl mass flow, in addition to...

Returning to in-cowl mass flow, in addition to heat exchanger flow, I see three inlets on Russell's Glasair. One has to be a combustion air source. What are the other two? How are they ducted and...
Forum: Alternative Engines 01-02-2022, 12:17 AM
Replies: 801
Views: 218,401
Posted By DanH
Yep.......

Yep.......
Forum: RV Ongoing Maintenance Issues 01-02-2022, 12:00 AM
Replies: 32
Views: 2,002
Posted By DanH
Paul, "inconclusive" is hearsay, or personal...

Paul, "inconclusive" is hearsay, or personal analysis? And what database?

I'm only aware of one, covering 18 builders and a bit more than 30 variables. Very few have seen it. One who did, a...
Forum: RV Building Tips/Techniques 01-01-2022, 05:50 PM
Replies: 13
Views: 1,006
Posted By DanH
And you'll find nothing authoritative here...

And you'll find nothing authoritative here either. Not even a consensus. And installed bolt preload, for which torque is only a proxy, is often lost in service. It does not require rotation of the...
Forum: Alternative Engines 01-01-2022, 02:00 PM
Replies: 801
Views: 218,401
Posted By DanH
Russell Sherwood's water cooled Glasair...which...

Russell Sherwood's water cooled Glasair...which apparently requires very little in-cowl airflow.
.
Forum: Alternative Engines 01-01-2022, 08:41 AM
Replies: 801
Views: 218,401
Posted By DanH
There is the first place to improve. Pressure...

There is the first place to improve. Pressure loss in the SCAT will be very high, so although the cowl may be flowing a lot of mass, mass flow through the intercooler itself will be poor. You're a...
Forum: Alternative Engines 12-31-2021, 08:18 PM
Replies: 801
Views: 218,401
Posted By DanH
Ahhh, forgot about the belly heat exchanger. ...

Ahhh, forgot about the belly heat exchanger. That makes mass flow through the cowl a very inefficient way to meet the cooling requirement. In effect, you're accepting the drag of a water cooling...
Forum: Alternative Engines 12-31-2021, 08:56 AM
Replies: 801
Views: 218,401
Posted By DanH
Follow up. The illustrations are measured Cp...

Follow up. The illustrations are measured Cp from CR3405, defined on page 5 as:

Cp = (upper cowl static pressure - freestream static pressure) / freestream dynamic pressure

It's unclear as to...
Forum: Alternative Engines 12-31-2021, 07:26 AM
Replies: 801
Views: 218,401
Posted By DanH
As Steve said, high pressure is good. Cooling...

As Steve said, high pressure is good.

Cooling capacity is a function of mass flow through the heat exchanger(s), and that flow is a closely related to deltaP across those exchangers.

Let's...
Forum: Alternative Engines 12-31-2021, 06:51 AM
Replies: 801
Views: 218,401
Posted By DanH
Heinrich, how much drift with temperature rise...

Heinrich, how much drift with temperature rise are you seeing with those particular manometers?
Forum: RV Building Tips/Techniques 12-29-2021, 04:59 PM
Replies: 29
Views: 3,496
Posted By DanH
Well heck. If I'd have known there was a brittle...

Well heck. If I'd have known there was a brittle prize....;)
Forum: RV-12/RV-12iS 12-29-2021, 08:59 AM
Replies: 8
Views: 1,355
Posted By DanH
Kudos to both Bruce and Jack. Good call, and a...

Kudos to both Bruce and Jack. Good call, and a follow-up with the rest of the story. Too many folks never report back.
Forum: RV Ongoing Maintenance Issues 12-29-2021, 08:51 AM
Replies: 5
Views: 524
Posted By DanH
Don't do that.

Don't do that.
Forum: RV-8/8A 12-29-2021, 08:49 AM
Replies: 12
Views: 1,773
Posted By DanH
Here variable area is a functional description. ...

Here variable area is a functional description. Implementation may take the form of a conventional cowl flap hinged at the leading edge, or some other manifestation.

For any given addition of exit...
Forum: Traditional Aircraft Engines 12-29-2021, 08:08 AM
Replies: 11
Views: 1,290
Posted By DanH
As others have noted, the left mag may be a bit...

As others have noted, the left mag may be a bit retarded. The overall higher EGT rise for #3 (greater increase when running on either mag) may be due to mixture distribution issues typical for a...
Forum: RV-14 12-27-2021, 06:17 PM
Replies: 15
Views: 1,902
Posted By DanH
10 to 15F.

10 to 15F.
Forum: Painting your RV 12-27-2021, 08:28 AM
Replies: 1
Views: 409
Posted By DanH
Identifying Common Paint Defects

Useful brochure worth downloading.

https://ppgrefinish-na.uberflip.com/i/1151231-guide-to-identifying-common-paint-defects/27?
Forum: Traditional Aircraft Engines 12-26-2021, 06:52 PM
Replies: 32
Views: 5,505
Posted By DanH
No big deal...you're a young man. More than a...

No big deal...you're a young man. More than a few guys here have quit buying green bananas.
Forum: RV-8/8A 12-26-2021, 07:47 AM
Replies: 21
Views: 2,630
Posted By DanH
Michael, where does one find the testing...

Michael, where does one find the testing document, and plans or pictures of the best version?
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