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Search: Posts Made By: DanH
Forum: Primers Yesterday, 04:36 PM
Replies: 10
Views: 263
Posted By DanH
I think the key feature is resistance to liquids...

I think the key feature is resistance to liquids we don't use, like Skydrol.

I'd suggest ordinary PPG DPLF epoxy primer, two cross coats. Lead and chromate free.

DBC basecoat under DCU2021...
Forum: Web Site Development Yesterday, 08:42 AM
Replies: 19
Views: 781
Posted By DanH
Thanks guys...this is great. And thank you for...

Thanks guys...this is great. And thank you for all the help offers!

Ok, looks like self study on software choice is next. I'll start by looking at Wordpress (as it seems to be very popular) and...
Forum: Electrical Systems Yesterday, 07:00 AM
Replies: 172
Views: 7,844
Posted By DanH
Got it. Returning to the very simple backup you...

Got it.

Returning to the very simple backup you described...



Operating description here:

http://www.sdsefi.com/air45.htm
Forum: Web Site Development Yesterday, 06:09 AM
Replies: 19
Views: 781
Posted By DanH
Thanks for the code offer Bill. Regarding...

Thanks for the code offer Bill.

Regarding domain and hosting, is my understanding correct? I can change hosts, and the forum links will still work?
Forum: Electrical Systems 05-21-2018, 09:24 PM
Replies: 172
Views: 7,844
Posted By DanH
Ross, what is the total load ...dual ECU, two...

Ross, what is the total load ...dual ECU, two coils, two fuel pumps, six injectors, all together?
Forum: Web Site Development 05-21-2018, 04:01 PM
Replies: 19
Views: 781
Posted By DanH
A Few Website Questions Please

Photo hosting with commercial providers has some serious issues. The major problem is longevity, and its effect on forum linking. We link photos, something changes at the host service, and all the...
Forum: Electrical Systems 05-21-2018, 02:26 PM
Replies: 172
Views: 7,844
Posted By DanH
True enough, but I would not select #6 for a 20...

True enough, but I would not select #6 for a 20 amp max load just to skip a fuse.
Forum: Electrical Systems 05-21-2018, 08:47 AM
Replies: 172
Views: 7,844
Posted By DanH
A sincere attempt to provide review, as most...

A sincere attempt to provide review, as most request, requires time and thought. And we've been discussing much of it for a long time. Didn't feel a great need to post architecture again,...
Forum: Electrical Systems 05-20-2018, 08:42 AM
Replies: 30
Views: 4,078
Posted By DanH
Can you offer a reference to support the claim? ...

Can you offer a reference to support the claim? It's a curiosity question. I suspect the answer require math, and the difference is tiny.

Moving to the practical, everything I find says rectifier...
Forum: Electrical Systems 05-20-2018, 05:59 AM
Replies: 172
Views: 7,844
Posted By DanH
Ok, so as a trained engineer/designer, what can...

Ok, so as a trained engineer/designer, what can you contribute to the discussion? How would you increase reliability, reduce risk, and simplify operation?
Forum: Electrical Systems 05-19-2018, 06:58 PM
Replies: 172
Views: 7,844
Posted By DanH
Not necessarily. Consider Cliff's architecture,...

Not necessarily. Consider Cliff's architecture, or John's. I merely posit that less is better. Ross says getting to none (an automated injector swap) is too difficult, so it looks like one switch...
Forum: Electrical Systems 05-19-2018, 02:28 PM
Replies: 172
Views: 7,844
Posted By DanH
That would work. Non-standard, so it would...

That would work. Non-standard, so it would require a bit of pilot training. A pre-start checklist perhaps? After start, it can't be verified without shutting down the main bus, so it's impractical...
Forum: Electrical Systems 05-19-2018, 07:12 AM
Replies: 130
Views: 28,808
Posted By DanH
When you gents say "Vans alternator", do you mean...

When you gents say "Vans alternator", do you mean the Plane Power 60 amp currently listed by the Mothership, or some older...
Forum: Electrical Systems 05-18-2018, 05:00 PM
Replies: 172
Views: 7,844
Posted By DanH
(1) You're on the run up pad. How will you...

(1) You're on the run up pad. How will you determine if the aux feed is actually working?

(2) 8500 ft, smoke in the cockpit. I'm not going to tell you the source. just like you won't know in the...
Forum: Electrical Systems 05-18-2018, 12:43 PM
Replies: 172
Views: 7,844
Posted By DanH
Josh, are the cross tie and ESS Aux switches open...

Josh, are the cross tie and ESS Aux switches open or closed for normal flight?
Forum: Electrical Systems 05-18-2018, 07:46 AM
Replies: 172
Views: 7,844
Posted By DanH
Or merely assessing it before buying it. ...

Or merely assessing it before buying it.



Precisely.

Perfect = The failure of one feed requires no immediate pilot action to keep the fan turning.

Acceptable = The failure of one feed...
Forum: Electrical Systems 05-18-2018, 07:00 AM
Replies: 130
Views: 28,808
Posted By DanH
The popular Plane Power 60 amp appears to be a...

The popular Plane Power 60 amp appears to be a custom version of this unit....

https://www.unipoint.com.tw/product_info_page.php?p_id=508

...with its #662 regulator modified by the addition of a...
Forum: Electrical Systems 05-17-2018, 02:31 PM
Replies: 172
Views: 7,844
Posted By DanH
Conceptually excellent. The avionics standard...

Conceptually excellent.



The avionics standard is a professional pinout drawing, regardless of who assembles the harness. Why should EFI be different?
Forum: Electrical Systems 05-17-2018, 09:19 AM
Replies: 172
Views: 7,844
Posted By DanH
In the meantime, it sure would be nice to see a...

In the meantime, it sure would be nice to see a complete wiring diagram for a dual EM-5. This one seems to be missing all the details for injector...
Forum: RV General Discussion/News 05-16-2018, 08:58 PM
Replies: 17
Views: 978
Posted By DanH
Earplugs and an eyemask. Best OSH HBC advice I...

Earplugs and an eyemask.

Best OSH HBC advice I ever got.
Forum: Electrical Systems 05-16-2018, 07:22 PM
Replies: 172
Views: 7,844
Posted By DanH
True enough. For now we can only hope some EFI...

True enough. For now we can only hope some EFI vendor will eventually automate the injector ECU swap.

On topic, we don't want to add more OSS's in the supporting electrical system.
Forum: Tools 05-16-2018, 04:15 PM
Replies: 25
Views: 972
Posted By DanH
Ok, permission granted ;) Seriously, there are a...

Ok, permission granted ;)

Seriously, there are a number of nutplate locations where frictional locking power just isn't necessary. For example, I don't hesitate to tap the four nutplates holding an...
Forum: Electrical Systems 05-16-2018, 01:24 PM
Replies: 172
Views: 7,844
Posted By DanH
Ok, so returning to guidance from an experienced...

Ok, so returning to guidance from an experienced vendor....



Thank you. So what can you help us learn?

RV-6: Voltage regulator failure is pretty obvious, based on the pilot report of hot...
Forum: Traditional Aircraft Engines 05-16-2018, 06:29 AM
Replies: 14
Views: 943
Posted By DanH
I have to ask you to contact Rostra Vernatherm...

I have to ask you to contact Rostra Vernatherm directly:

https://www.vernatherm.com/

BTW, there's a page here everyone should see...the core of our...
Forum: Electrical Systems 05-16-2018, 06:15 AM
Replies: 172
Views: 7,844
Posted By DanH
Yes, please, let's return to topic.

Yes, please, let's return to topic.
Forum: Electrical Systems 05-15-2018, 03:19 PM
Replies: 172
Views: 7,844
Posted By DanH
Even if both EarthX batteries disconnected...

Even if both EarthX batteries disconnected themselves, the alternator is still there, with voltage at some high level.

As for the NTSB, I wouldn't hold your breath. Not a problem, given Robert's...
Forum: Traditional Aircraft Engines 05-15-2018, 12:55 PM
Replies: 14
Views: 943
Posted By DanH
Per the Rosta drawing, 0.160" between 150F and...

Per the Rosta drawing, 0.160" between 150F and 185F.
Forum: Electrical Systems 05-15-2018, 12:51 PM
Replies: 172
Views: 7,844
Posted By DanH
Thank you. So what can you help us learn? RV-6:...

Thank you. So what can you help us learn?

RV-6: Voltage regulator failure is pretty obvious, based on the pilot report of hot batteries and 15.5V at last check. We've been told EarthX batteries...
Forum: Traditional Aircraft Engines 05-15-2018, 11:01 AM
Replies: 3
Views: 319
Posted By DanH
A 4-cyl Lycoming circulates oil at a rate of...

A 4-cyl Lycoming circulates oil at a rate of about 7 gallons per minute at 2700. So, the only listed pump which might work in flight is the GP303-12L. The linked charts say it will take 15 amps to...
Forum: Electrical Systems 05-15-2018, 07:07 AM
Replies: 172
Views: 7,844
Posted By DanH
Ok, so seriously....tell us what happened to...

Ok, so seriously....tell us what happened to these...
Forum: Traditional Aircraft Engines 05-13-2018, 10:18 AM
Replies: 39
Views: 4,211
Posted By DanH
It's a waste spark CDI. The initial symptom may...

It's a waste spark CDI.

The initial symptom may have been a single plug not firing, as the disconnected plug wire arced to the nearest engine metal. If so, the paired plug on that coil would have...
Forum: RV General Discussion/News 05-13-2018, 06:57 AM
Replies: 11
Views: 1,132
Posted By DanH
Looks like I may wait a few days in central PA. ...

Looks like I may wait a few days in central PA. Could be worse. I'm at my mom's place for Mothers Day. She is delighted. Pot roast this afternoon! ;)
Forum: RV-8/8A 05-13-2018, 06:47 AM
Replies: 3
Views: 521
Posted By DanH
Rough cut all the plies. Weight them together,...

Rough cut all the plies. Weight them together, then stack them on a 4 mil plastic sheet. Mix, by weight, a quantity of epoxy equal to the glass weight, with maybe a little extra. Now pour the...
Forum: Traditional Aircraft Engines 05-13-2018, 06:33 AM
Replies: 3
Views: 407
Posted By DanH
Just replaced mine too, Lycoming pump, similar...

Just replaced mine too, Lycoming pump, similar age. Seemed to have a failing oil diaphragm. I'm planning an autopsy. Not inside yet, but past posts suggest that if replacement parts are available,...
Forum: Traditional Aircraft Engines 05-13-2018, 06:17 AM
Replies: 5
Views: 459
Posted By DanH
You suspect right. It's Tango Uniform.

You suspect right. It's Tango Uniform.
Forum: RV Ongoing Maintenance Issues 05-13-2018, 06:11 AM
Replies: 5
Views: 344
Posted By DanH
I suspect the solid state sender has a high...

I suspect the solid state sender has a high response rate, while a mechanical VDO type may not register the same pulsations. It just wears out.

I am developing a belief that VDO can-type senders do...
Forum: RV General Discussion/News 05-12-2018, 10:08 AM
Replies: 82
Views: 12,655
Posted By DanH
Ya'll save a few brain cells for Monday night ;)

Ya'll save a few brain cells for Monday night ;)
Forum: RV General Discussion/News 05-12-2018, 06:08 AM
Replies: 34
Views: 1,967
Posted By DanH
Set gascolator pressure loss aside for a moment,...

Set gascolator pressure loss aside for a moment, and consider only the effect of flow and G. Pressure loss due to flow increase is a function of line friction. Pressure loss due to G is a function...
Forum: RV-10 05-12-2018, 05:40 AM
Replies: 11
Views: 1,311
Posted By DanH
The guy just needs a qualified support system for...

The guy just needs a qualified support system for the airplane, same as he would if he owned a Bonanza.
Forum: Trip Write-ups 05-10-2018, 08:38 AM
Replies: 23
Views: 2,157
Posted By DanH
About 1.5 miles to the interstate exit, many...

About 1.5 miles to the interstate exit, many choices. Travis will take care of you.

Forgot to mention the catfish place at KMVC, just off the north end of the airport.
Forum: Trip Write-ups 05-09-2018, 09:34 PM
Replies: 23
Views: 2,157
Posted By DanH
Don't think there is anything at 61A. In that...

Don't think there is anything at 61A. In that neighborhood you want KPRN (Greenville) for food and fuel. Or KMVC (Monroeville) usually has free food at the FBO with a fuel buy. It's a popular...
Forum: RV General Discussion/News 05-09-2018, 10:13 AM
Replies: 8
Views: 1,485
Posted By DanH
On 250-300 purchases, I'd say the average...

On 250-300 purchases, I'd say the average surviving spouse takes six months to wade through a combination of administration and loss issues.
Forum: RV-8/8A 05-09-2018, 05:44 AM
Replies: 9
Views: 891
Posted By DanH
Oh good. A bit of extra sleep is usually...

Oh good. A bit of extra sleep is usually required on Tuesday morning.
Forum: Traditional Aircraft Engines 05-09-2018, 05:42 AM
Replies: 5
Views: 723
Posted By DanH
Pretty sure both standard EXP and Thunderbolt get...

Pretty sure both standard EXP and Thunderbolt get 1.5 to 3.0 hours, with a printout.

Thunderbolt engines get pistons, pins, and connecting rods matched within 0.5 grams. EXP and Thunderbolt get...
Forum: Electrical Systems 05-08-2018, 06:50 PM
Replies: 172
Views: 7,844
Posted By DanH
So what did? The question goes directly to the...

So what did? The question goes directly to the subject, power system architecture. Both quit running for some reason, and I'm sure everyone would like to avoid whatever it was.
Forum: Electrical Systems 05-08-2018, 04:13 PM
Replies: 172
Views: 7,844
Posted By DanH
Installing a box doesn't guarantee...

Installing a box doesn't guarantee...
Forum: Fuel Injection Systems 05-06-2018, 12:23 PM
Replies: 24
Views: 1,437
Posted By DanH
Free flow (pumping to a bucket, so to speak), or...

Free flow (pumping to a bucket, so to speak), or pumping back to the tank through the pressure regulator and return system?



A pressure gauge near the inlet to the pumps would tell a lot. Two...
Forum: RV General Discussion/News 05-06-2018, 07:51 AM
Replies: 64
Views: 5,312
Posted By DanH
As previously noted, that claim seems to be based...

As previously noted, that claim seems to be based on the old style AFP pump package. In fairness, perhaps it is time to update the claim (and the comparison on the EFII sales page) with measurements...
Forum: Fuel Injection Systems 05-06-2018, 07:18 AM
Replies: 24
Views: 1,437
Posted By DanH
Just what it says...locate design references. My...

Just what it says...locate design references.

My mentor taught me that until you quantified a thing, you didn't really understand it. I'd like more insight into the physical mechanics of why some...
Forum: RV-8/8A 05-06-2018, 06:15 AM
Replies: 9
Views: 891
Posted By DanH
There 'ya go...all we needed was a donut...

There 'ya go...all we needed was a donut volunteer. Pilots will walk miles for a free donut.

Steve, what time?
Forum: RV Ongoing Maintenance Issues 05-05-2018, 09:56 AM
Replies: 19
Views: 1,145
Posted By DanH
Two different kinds of ignition, one CDI, one...

Two different kinds of ignition, one CDI, one inductive. And the Lightspeed CDI may be multispark, IIRC. Both electronic, but very different.
Forum: Fuel Injection Systems 05-05-2018, 07:25 AM
Replies: 24
Views: 1,437
Posted By DanH
Ok, Bob makes good points, and empirical evidence...

Ok, Bob makes good points, and empirical evidence says it's possible, given good hardware layout, to pull some unknown high volume of 100LL to a pair of parallel pumps running at the same time. For...
Forum: Electrical Systems 05-05-2018, 06:49 AM
Replies: 41
Views: 1,543
Posted By DanH
Ahhh. It makes sense when labeled as an E-bus...

Ahhh. It makes sense when labeled as an E-bus switch operated as described.

Many folks wire a "start enable" switch as a safety and anti-theft device, often hidden in some out-of-sight cockpit...
Forum: RV General Discussion/News 05-05-2018, 06:07 AM
Replies: 17
Views: 722
Posted By DanH
Nicely done. Note that Gary's solder lug...

Nicely done.

Note that Gary's solder lug installation is also environmentally stable. Long term, it is unlikely to add resistance due to any reasonable level of corrosion.
Forum: RV-14 05-04-2018, 05:11 PM
Replies: 31
Views: 2,688
Posted By DanH
I'm sorry Carl, but I know very little about the...

I'm sorry Carl, but I know very little about the AvStar units.
Forum: Fuel Injection Systems 05-04-2018, 03:30 PM
Replies: 24
Views: 1,437
Posted By DanH
I hear you. EFI, dual inline electric pumps. ...

I hear you. EFI, dual inline electric pumps. Can you run both pumps at the same time, sucking through the fuel selector and inline filter?
Forum: RV-14 05-04-2018, 03:25 PM
Replies: 31
Views: 2,688
Posted By DanH
A little less "carb loss", the loss of manifold...

A little less "carb loss", the loss of manifold pressure due to intake restriction.

The bore designs are quite different. See Kitplanes, March 2016.
Forum: Fuel Injection Systems 05-04-2018, 08:56 AM
Replies: 24
Views: 1,437
Posted By DanH
I've rapidly adopted that very...

I've rapidly adopted that very conclusion.



Interesting calculator. I've asked if it is available in Excel, as I'd like to see the underlying math. Still, as you say, it's not going to help with...
Forum: RV-8/8A 05-04-2018, 07:29 AM
Replies: 16
Views: 3,065
Posted By DanH
Kitplanes, 2014, at Maule...

Kitplanes, 2014, at Maule...
Forum: Electrical Systems 05-03-2018, 05:39 PM
Replies: 41
Views: 1,543
Posted By DanH
Actually Joe designed it, but yep, it's latched,...

Actually Joe designed it, but yep, it's latched, unless the shutdown procedure includes cycling the start enable.

http://i67.tinypic.com/15p2xkw.jpg
Forum: Electrical Systems 05-03-2018, 03:27 PM
Replies: 41
Views: 1,543
Posted By DanH
With the "Start Enable" switch set to disable the...

With the "Start Enable" switch set to disable the start button, the e-bus will not disconnect from the main battery at shutdown. Eventually the relay coil will discharge the main battery. It will...
Forum: RV-14 05-03-2018, 11:41 AM
Replies: 31
Views: 2,688
Posted By DanH
...and put some 970's on those carefully gooped...

...and put some 970's on those carefully gooped rod ends ;)
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