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Search: Posts Made By: DanH
Forum: RV General Discussion/News Yesterday, 03:07 PM
Replies: 13
Views: 570
Posted By DanH
Good pun! Actually your question serves as a...

Good pun!

Actually your question serves as a nice illustration of how important it is to get the airplane really, truly longeron-level when weighed. The tailwheel weight varies a fair bit from tail...
Forum: RV General Discussion/News Yesterday, 01:05 PM
Replies: 13
Views: 570
Posted By DanH
It will not nose over. You would need to raise...

It will not nose over. You would need to raise the tail far more than just longeron level, like tailwheel high as your head or more.
Forum: Traditional Aircraft Engines Yesterday, 08:19 AM
Replies: 5
Views: 217
Posted By DanH
I see #1 EGT rising at full throttle, not with...

I see #1 EGT rising at full throttle, not with throttle reduction.
Forum: RV Photo/Video URLs Yesterday, 07:52 AM
Replies: 24
Views: 2,431
Posted By DanH
We have a lot of MTR's in the SE too. Last time...

We have a lot of MTR's in the SE too. Last time our EAA group visited the local ATC facility (MGM), the chief told us their radar cannot see a high percentage of the low level military routes. The...
Forum: Traditional Aircraft Engines Yesterday, 07:35 AM
Replies: 44
Views: 2,614
Posted By DanH
Hans, there is nothing wrong with peak EGT at...

Hans, there is nothing wrong with peak EGT at some moderate power setting. It's Lycoming's economy cruise recommendation.
Forum: RV-10 09-20-2020, 07:50 PM
Replies: 22
Views: 7,181
Posted By DanH
That's the right idea. Jorge, can you put some...

That's the right idea.

Jorge, can you put some numbers to "amazing results"?
Forum: Electrical Systems 09-18-2020, 12:29 PM
Replies: 51
Views: 5,548
Posted By DanH
No need to guess. Just connect your multimeter...

No need to guess. Just connect your multimeter in series between the battery terminal and the ignition power wire, and set it to amps. If it's anything but zero, you have a power draw.
Forum: Electrical Systems 09-18-2020, 08:14 AM
Replies: 51
Views: 5,548
Posted By DanH
I have a Skytec NL wired internally to eliminate...

I have a Skytec NL wired internally to eliminate the separate firewall contactor. The grip start button drives an ordinary relay, which feeds the internal solenoid. ...
Forum: RV General Discussion/News 09-17-2020, 09:11 AM
Replies: 7
Views: 402
Posted By DanH
Mike, I install an internal trim whenever...

Mike, I install an internal trim whenever possible, usually a bungee bias. They can be fixed length with one end adjustable for a single flight regime (like climb, or cruise), or put that end on a...
Forum: RV General Discussion/News 09-17-2020, 06:28 AM
Replies: 7
Views: 402
Posted By DanH
Place the mass of the servo as close to the hinge...

Place the mass of the servo as close to the hinge line as possible. Make all aft-mounted hardware as light as possible.
Forum: Traditional Aircraft Engines 09-16-2020, 08:52 AM
Replies: 21
Views: 2,726
Posted By DanH
Maybe not. Easy to check. When cold, stick a...

Maybe not. Easy to check. When cold, stick a strip of aluminum tape across the joint, crank it, and shut it down right away. If it's shake, it will tear the tape.

Returning to Mouse Milk, does...
Forum: Traditional Aircraft Engines 09-16-2020, 06:10 AM
Replies: 21
Views: 2,726
Posted By DanH
Alex, that relative motion could easily be the...

Alex, that relative motion could easily be the result of start-up shake.



Nickel anti-seize makes a lot of sense.
Forum: Traditional Aircraft Engines 09-15-2020, 12:33 PM
Replies: 21
Views: 2,726
Posted By DanH
And there is this sales...

And there is this sales sheet:

https://www.mousemilk.com/MM_Tech_Spec_rev1.pdf

Ingredient list and sales literature says it's a penetrating liquid, like a great many other similar products, and...
Forum: Traditional Aircraft Engines 09-15-2020, 10:53 AM
Replies: 21
Views: 2,726
Posted By DanH
Mouse Milk?

Within the Continental/Lycoming community, Mouse Milk is often prescribed as a standard maintenance item for exhaust system joints. In the Rotax world, an anti-seize compound appears to be more...
Forum: RV-8/8A 09-14-2020, 09:00 PM
Replies: 854
Views: 1,060,068
Posted By DanH
https://lh3.googleusercontent.com/pw/ACtC-3enQO-LP...

https://lh3.googleusercontent.com/pw/ACtC-3enQO-LPLh7SKyE_7ZwrC7eZNTV2Vk3SFXe_1g2FEp91EjP3QbcoJRTFmBGXTtbF5O8EgkEWeKxmrOjDRFmtM1bxKbX6zJeari-c1QGg6t1g2IMI6fKZjnnc46i8P_Q7Pr6mB52EUDiWw2rKRHay1VO=w915-h...
Forum: RV-14 09-13-2020, 08:14 PM
Replies: 48
Views: 5,525
Posted By DanH
The likely explanation is your vernatherm isn't...

The likely explanation is your vernatherm isn't sealing the bypass hole.
Forum: Safety 09-13-2020, 06:05 AM
Replies: 10
Views: 2,189
Posted By DanH
Knew how to look up a registration, plus no...

Knew how to look up a registration, plus no mention of "didn't file a light plan" or "heard the engine sputtering". Folks, I think the news department may have actually included a pilot!...
Forum: Safety 09-12-2020, 10:37 AM
Replies: 57
Views: 6,982
Posted By DanH
Or simply fail to neutralize pitch input before...

Or simply fail to neutralize pitch input before making the roll input.

I'll suggest a caveat for the description of flight taken from the EFIS recording; the EFIS appears to have been set to record...
Forum: RV-14 09-11-2020, 05:54 PM
Replies: 48
Views: 5,525
Posted By DanH
Ok, usual probe in the filter adapter location...

Ok, usual probe in the filter adapter location plus, sometimes, one in the line to the cooler.



Gallons per minute, unless the vernatherm was cold/retracted.



Which returns us to topic. Table...
Forum: RV-14 09-11-2020, 02:11 PM
Replies: 48
Views: 5,525
Posted By DanH
Obscure? Hardly. The run-in chart is page 9-2. ...

Obscure? Hardly. The run-in chart is page 9-2. SB113 is referenced in the first paragraph on page 9-3.



So where are you locating the temperature probes?
Forum: Electronic Ignition Systems 09-11-2020, 06:42 AM
Replies: 25
Views: 1,371
Posted By DanH
Pull the female spade connectors on the coils. ...

Pull the female spade connectors on the coils. Look for evidence of fretting and burning.
Forum: RV-14 09-10-2020, 04:27 PM
Replies: 48
Views: 5,525
Posted By DanH
No trap. Always interesting to see what folks...

No trap. Always interesting to see what folks dig out of Lycoming and Continental documents.

You're evidently referring to Table 9-1, attached. It's a list of preferred conditions for run-in on...
Forum: RV-14 09-10-2020, 01:19 PM
Replies: 48
Views: 5,525
Posted By DanH
They do? Show us the document.

They do? Show us the document.
Forum: Tools 09-10-2020, 09:54 AM
Replies: 30
Views: 4,005
Posted By DanH
https://www.danhorton.net/Articles/1014_ShopMadeTo...

https://www.danhorton.net/Articles/1014_ShopMadeTools.pdf
Forum: RV-14 09-10-2020, 06:42 AM
Replies: 48
Views: 5,525
Posted By DanH
No. The vernatherm is retracted when cold,...

No.

The vernatherm is retracted when cold, meaning the cooler bypass passage is open. Some oil flows through the cooler, while some flows through the bypass.

When the oil is hot, the vernatherm...
Forum: RV General Discussion/News 09-09-2020, 01:04 PM
Replies: 117
Views: 10,045
Posted By DanH
I guarantee an insurmountable obstacle can be...

I guarantee an insurmountable obstacle can be found in every control scheme, if we dig hard enough.

Here's reality. Jessica will not be as safe in every possible circumstance as (for example) Patty...
Forum: RV General Discussion/News 09-08-2020, 06:36 PM
Replies: 117
Views: 10,045
Posted By DanH
Good point Scott. Anyone out there with electric...

Good point Scott.

Anyone out there with electric rudder trim? If you crank in a bunch of right trim, what does the takeoff roll then require in terms of pedal input?

Along the same lines, it...
Forum: RV General Discussion/News 09-08-2020, 01:52 PM
Replies: 117
Views: 10,045
Posted By DanH
And the picture is quite helpful with our...

And the picture is quite helpful with our imagineering!

Break.

Question for the RV-10 owners, and for Scott. How much crab angle will an RV-10 tolerate at touchdown?

Here's why I ask. A...
Forum: RV-10 09-08-2020, 05:52 AM
Replies: 23
Views: 2,498
Posted By DanH
Good stuff Mike. Let me know if you want to...

Good stuff Mike. Let me know if you want to gather pressures.

A question relating to the exhaust augmentation...does it cool well with the aircraft in level flight near stall speed? You know, like...
Forum: RV General Discussion/News 09-06-2020, 09:51 PM
Replies: 117
Views: 10,045
Posted By DanH
Let's keep a few practical issues in mind. (1)...

Let's keep a few practical issues in mind.

(1) Jessica is unlikely to build the airplane, so she will not have a Repairman's certificate, thus an A&P will be responsible for maintenance and...
Forum: RV-10 09-06-2020, 08:53 PM
Replies: 23
Views: 2,498
Posted By DanH
5" diameter (well, ok, 4.9") isn't real small. ...

5" diameter (well, ok, 4.9") isn't real small. Not that it really matters. The inlets can be large, or small, or very small, depending on design approach, i.e. internal or external diffusion. Mass...
Forum: RV-10 09-05-2020, 06:36 PM
Replies: 23
Views: 2,498
Posted By DanH
It means they have lousy pressure recovery, i.e....

It means they have lousy pressure recovery, i.e. a poor inlet duct system. The plenum lid further aft is just a way to achieve zero leakage, and as such cannot cause a cooling problem. In fairness,...
Forum: Electronic Ignition Systems 09-04-2020, 08:15 AM
Replies: 8
Views: 960
Posted By DanH
John, to be clear, the clearance problem is...

John, to be clear, the clearance problem is between the p-mag body and the gear, not gear to crankcase wall? At the red arrow?
Forum: RV General Discussion/News 09-04-2020, 07:47 AM
Replies: 117
Views: 10,045
Posted By DanH
The mission, as you have explained it, requires...

The mission, as you have explained it, requires more seats, so let's focus on a -10. Nothing lost if you change your mind, as much of the mechanics would apply to other models.



Fine for taxi, not...
Forum: RV General Discussion/News 09-03-2020, 07:09 AM
Replies: 117
Views: 10,045
Posted By DanH
Width is important for cockpit maneuvering, ie....

Width is important for cockpit maneuvering, ie. knee room (see the photo), but if I understand correctly, a key here is that Jessica's current inflight sitting position is simply uncomfortable. ...
Forum: Electronic Ignition Systems 09-03-2020, 05:47 AM
Replies: 141
Views: 24,512
Posted By DanH
Currently only one model has an approved variable...

Currently only one model has an approved variable timing part number, the IO-390D, in four configurations. Don't know if any customers are using the variable option in the field. Maybe CubCrafters...
Forum: Electronic Ignition Systems 09-02-2020, 05:07 PM
Replies: 141
Views: 24,512
Posted By DanH
Interesting...

Interesting reading:

https://www.lycoming.com/sites/default/files/SI1569A_Installation_of_Lycoming_EIS.pdf
Forum: RV General Discussion/News 09-02-2020, 04:42 PM
Replies: 117
Views: 10,045
Posted By DanH
Jessica, thinking out loud here. You may not...

Jessica, thinking out loud here. You may not understand all I'll say, because you may not be familiar with the parts...but it might stir ideas with other folks who are. Let the stirring begin...
Forum: Traditional Aircraft Engines 09-02-2020, 07:09 AM
Replies: 8
Views: 969
Posted By DanH
Symptoms do suggest abnormal combustion. "All...

Symptoms do suggest abnormal combustion. "All cylinders" suggest timing. David's suggestion to inspect with a borescope is a good plan.

Assuming a detonation event, cut the oil filter, pull out...
Forum: Fiberglass 09-02-2020, 06:44 AM
Replies: 20
Views: 2,297
Posted By DanH
We all learn anything we wish, if we want it. ...

We all learn anything we wish, if we want it. Sex is a pretty good example.



Dave I used lap joints because I intended to pressurize the lower cowl to a level somewhat higher than typical. Flush...
Forum: Fiberglass 09-01-2020, 05:44 PM
Replies: 20
Views: 2,297
Posted By DanH
This one has nearly 1000 hours on it. No...

This one has nearly 1000 hours on it. No problems. The exit panel goes on with screws and nutplates, so it is more or less structural, but the air intake fasteners are just quarter-turns. Both are...
Forum: Fiberglass 09-01-2020, 08:13 AM
Replies: 20
Views: 2,297
Posted By DanH
What Ralph said. Remove the inner plies, remove...

What Ralph said. Remove the inner plies, remove the core, fill with flox, cap with a patch. These are screw locations. You can remove the core by working in from the edge, if your nutplates...
Forum: Electronic Ignition Systems 08-31-2020, 10:23 AM
Replies: 141
Views: 24,512
Posted By DanH
I rarely pull mixture much past peak in cross...

I rarely pull mixture much past peak in cross country cruise, as I am not willing to accept the speed loss.

Here's an example, playing around with advance while returning from OSH 2019. I'm at...
Forum: Electronic Ignition Systems 08-31-2020, 07:22 AM
Replies: 141
Views: 24,512
Posted By DanH
Nigel's data (gathered with a high compression...

Nigel's data (gathered with a high compression parallel valve, like PFB's) says speed continued to rise with increasing advance when operating LOP at higher altitudes, and the trend continued out...
Forum: Electronic Ignition Systems 08-30-2020, 03:03 PM
Replies: 141
Views: 24,512
Posted By DanH
At press time for OSH 2019, the Lycoming-branded...

At press time for OSH 2019, the Lycoming-branded versions were to have their own locked timing schedules, as determined in the Lycoming dyno facility. Those schedules were to be engine-specific,...
Forum: Electronic Ignition Systems 08-30-2020, 10:55 AM
Replies: 141
Views: 24,512
Posted By DanH
Lenny, I have that one, formerly published on the...

Lenny, I have that one, formerly published on the company website. Is it still there and I've missed it?
Forum: Electronic Ignition Systems 08-30-2020, 07:32 AM
Replies: 141
Views: 24,512
Posted By DanH
Just to be clear, allow me to again state...

Just to be clear, allow me to again state specifics.

(1) Regarding advanced timing, for the average user the downside is higher temperatures for little return. A high percentage of owners fight...
Forum: Electronic Ignition Systems 08-28-2020, 10:50 PM
Replies: 141
Views: 24,512
Posted By DanH
Jimmy, let's skip the straw man stuff and get...

Jimmy, let's skip the straw man stuff and get back to the question at hand.

Regarding variable timing, you wrote..

.At cruise altitude (below 25" MP, WOT, 10,000', 8.0gph) at 100 ROP I've recorded...
Forum: Electronic Ignition Systems 08-28-2020, 01:20 PM
Replies: 141
Views: 24,512
Posted By DanH
The system I've been flying since early 2016 is...

The system I've been flying since early 2016 is dual map. It also allows setting any advance schedule desired at 100 points.

With dual maps, I keep one set for 23 fixed (angle valve 390), and the...
Forum: Electronic Ignition Systems 08-28-2020, 06:59 AM
Replies: 141
Views: 24,512
Posted By DanH
To be clear, we're talking about advance here,...

To be clear, we're talking about advance here, not product. There's much to like about the product.

Regarding advanced timing, for the average user the downside is higher temperatures for little...
Forum: Electronic Ignition Systems 08-27-2020, 08:41 PM
Replies: 141
Views: 24,512
Posted By DanH
I don't think anyone is concerned about...

I don't think anyone is concerned about detonation.
Forum: Electrical Systems 08-27-2020, 05:22 PM
Replies: 32
Views: 2,338
Posted By DanH
The pad casting is there on all the standard...

The pad casting is there on all the standard accessory case covers. Offhand I don't remember if my early kit motor has a cover plate, or just the cast pad, without bore or studs. Either way, there...
Forum: Electrical Systems 08-27-2020, 04:17 PM
Replies: 32
Views: 2,338
Posted By DanH
Accessory case drive ratios.

Accessory case drive ratios.
Forum: Traditional Aircraft Engines 08-27-2020, 10:00 AM
Replies: 24
Views: 3,398
Posted By DanH
Got it. I asked because, in general, the angle...

Got it. I asked because, in general, the angle valve motors reject more heat through the oil. That said, a parallel valve with piston squirters will also need more heat rejection capacity.

Here is...
Forum: Electrical Systems 08-26-2020, 07:20 PM
Replies: 32
Views: 2,338
Posted By DanH
Ya'll quit worrying. Be patient.

Ya'll quit worrying. Be patient.
Forum: Traditional Aircraft Engines 08-26-2020, 03:17 PM
Replies: 24
Views: 3,398
Posted By DanH
Jimmy, is your IO360 parallel valve or angle...

Jimmy, is your IO360 parallel valve or angle valve?
Forum: Flight Testing 08-26-2020, 05:48 AM
Replies: 26
Views: 2,060
Posted By DanH
I am really, really, really enjoying the thread...

I am really, really, really enjoying the thread and looking forward to more....you know, "This is great!"
Forum: Flight Testing 08-25-2020, 06:08 PM
Replies: 26
Views: 2,060
Posted By DanH
https://youtu.be/arZdeg_fL-I

https://youtu.be/arZdeg_fL-I
Forum: RV Ongoing Maintenance Issues 08-25-2020, 09:00 AM
Replies: 24
Views: 2,644
Posted By DanH
Great way to check the accuracy of your flywheel...

Great way to check the accuracy of your flywheel TDC mark.
Forum: RV Ongoing Maintenance Issues 08-25-2020, 06:02 AM
Replies: 24
Views: 2,644
Posted By DanH
Using the timing marks on the rear side of the...

Using the timing marks on the rear side of the flywheel with the case split as a reference is always reliable.

The front governor crankcase has a large rectangular boss just aft of the topmost front...
Forum: RV Building Tips/Techniques 08-25-2020, 05:34 AM
Replies: 11
Views: 1,268
Posted By DanH
Or just skip the tinnermans. Instead use AN526...

Or just skip the tinnermans.

Instead use AN526 or 526C screws with a nylon washer, in a plain, straight hole.

Fiberglass does not play well with knife-edged countersunk holes. No bearing strength;...
Forum: RV Ongoing Maintenance Issues 08-24-2020, 06:05 AM
Replies: 14
Views: 1,369
Posted By DanH
Ordinary 1/4-20 thread. Hex bolts, drill the...

Ordinary 1/4-20 thread. Hex bolts, drill the heads, torque with a plain washer, wire them, done forever.

It would violate the Grumman Tiger parts manual, so I'm sure Leroy's ghost will refuse to...
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