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Search: Posts Made By: DanH
Forum: RV-8/8A Today, 07:55 AM
Replies: 10
Views: 751
Posted By DanH
Good point. Maintains an alternator feed to...

Good point. Maintains an alternator feed to IGN/EFI2 with both masters shut down. No electrical duration limit. Caveat; I have no idea how well the LR3C will control alternator output without a...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) Today, 07:22 AM
Replies: 22
Views: 507
Posted By DanH
Same here. It's been going on for years. IE,...

Same here.

It's been going on for years. IE, Chrome, or Firefox doesn't matter, Windows 7 or 10.
Forum: RV General Discussion/News Today, 07:17 AM
Replies: 3
Views: 685
Posted By DanH
Good luck Jen! Hey, make sure Katie knows how to...

Good luck Jen!

Hey, make sure Katie knows how to use a beer tap ;)
Forum: RV-12 Today, 07:12 AM
Replies: 103
Views: 10,801
Posted By DanH
Gents, the futility of diagnosis by long distance...

Gents, the futility of diagnosis by long distance is generally due to lack of complete information.

In this case, at two weeks we continue to have incomplete information. Let's back it down until...
Forum: RV-8/8A Yesterday, 06:06 PM
Replies: 10
Views: 751
Posted By DanH
Only odd spec is the mounting requirement, a...

Only odd spec is the mounting requirement, a 0.125"x16x16 aluminum plate for the full 200 amp rating. Surely the heat sink is needed only for continuous use at high...
Forum: RV-8/8A Yesterday, 01:26 PM
Replies: 10
Views: 751
Posted By DanH
No, he won't. The IGN and EFI run from either...

No, he won't. The IGN and EFI run from either hot battery bus. Endurance is the total of two batteries, run one at a time.

Got a line on some suitable solid state contactors? We all want to ditch...
Forum: RV-10 Yesterday, 07:58 AM
Replies: 75
Views: 14,585
Posted By DanH
Depends on what you call "medium...

Depends on what you call "medium altitude".

Scott's current engine is a experimental mule with about 230 HP. The long term plan is replacement with a new CD-265 (aka a TDIO-304-A on the TCDS),...
Forum: RV General Discussion/News 12-12-2017, 07:25 AM
Replies: 14
Views: 1,396
Posted By DanH
Which would not be the Rocket way. It's a...

Which would not be the Rocket way.



It's a wonderful word Vern.

How thick are those Rocket skins anyway?
Forum: RV-12 12-11-2017, 04:28 PM
Replies: 103
Views: 10,801
Posted By DanH
Ummm, Andrew....you really want to argue that...

Ummm, Andrew....you really want to argue that point with Ross, based on a Contact article? ;)
Forum: RV-12 12-11-2017, 08:24 AM
Replies: 103
Views: 10,801
Posted By DanH
Is session time in seconds? Your RPM chart...

Is session time in seconds?

Your RPM chart went missing.
Forum: RV-12 12-09-2017, 07:08 AM
Replies: 103
Views: 10,801
Posted By DanH
Can't speak for Rotax. True at Lycoming; I asked...

Can't speak for Rotax. True at Lycoming; I asked some years ago.



Nor do I. Nor am I. But don't cut yourself short. You post good stuff.

Re .."takes a while to progress..";


Note "within...
Forum: RV-12 12-08-2017, 10:47 AM
Replies: 103
Views: 10,801
Posted By DanH
Not the Rotax graph. I was asking about the RPM...

Not the Rotax graph. I was asking about the RPM graph you posted to your blog. Y is RPM, X appears to be time, and I was curious about the units. You see, detonation typically takes a while to...
Forum: RV-7/7A 12-07-2017, 09:50 PM
Replies: 19
Views: 1,596
Posted By DanH
Why are delrin stops desirable?

Why are delrin stops desirable?
Forum: RV-12 12-07-2017, 06:01 PM
Replies: 103
Views: 10,801
Posted By DanH
Here I assume: ...

Here I assume: http://912ulsenginefailure.blogspot.com/

Jim, what does the X-axis represent, and in what units?

In your first post you stated:

There's also the fact that the engine post failure...
Forum: Traditional Aircraft Engines 12-06-2017, 09:30 AM
Replies: 17
Views: 1,346
Posted By DanH
Piston position when the waste spark is delivered...

Piston position when the waste spark is delivered is the same as the opposing piston at ignition spark....in this case assumed to be at TDC or after.
Forum: RV-8/8A 12-05-2017, 08:23 AM
Replies: 13
Views: 1,801
Posted By DanH
JP, is the 84 sq in figure a typo? To use a...

JP, is the 84 sq in figure a typo? To use a popular phrase, that is huge. Stock RV-8 is about 60 sq in if I recall correctly.

Recall I modified the cowl during construction with nutplates so the...
Forum: RV-8/8A 12-04-2017, 12:56 PM
Replies: 13
Views: 1,801
Posted By DanH
There is no valid inlet- exit ratio.

There is no valid inlet- exit ratio.
Forum: RV General Discussion/News 12-04-2017, 10:32 AM
Replies: 394
Views: 1,415,334
Posted By DanH
The last blister survey was circa 2009. It would...

The last blister survey was circa 2009. It would be interesting to gather fresh data. If you have blisters, and would like to answer a few survey questions, please send a private email.
Forum: RV General Discussion/News 12-04-2017, 07:17 AM
Replies: 37
Views: 4,570
Posted By DanH
No comparison can be made without comparable...

No comparison can be made without comparable altitude and airspeed.

To record cowl pressure information which can actually be compared to others, all participants fly the same altitude (current...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 12-03-2017, 06:10 AM
Replies: 5
Views: 259
Posted By DanH
Pretty fancy panel for a gyro.

Pretty fancy panel for a gyro.
Forum: RV General Discussion/News 12-03-2017, 06:06 AM
Replies: 21
Views: 1,983
Posted By DanH
Now if we could just find a permanent home for...

Now if we could just find a permanent home for all the lost visual content.

We're talking builder support here, not cat videos.
Forum: RV-8/8A 12-02-2017, 06:52 AM
Replies: 7
Views: 872
Posted By DanH
The primer will certainly wear away under the...

The primer will certainly wear away under the clamps, but the re-torque at the first annual covers it. A little light grease under the clamp protects the contact surfaces. I suggest an epoxy primer...
Forum: RV-12 12-02-2017, 06:38 AM
Replies: 103
Views: 10,801
Posted By DanH
Could we see the upper half of the affected...

Could we see the upper half of the affected cylinder head's combustion chamber, and the upper spark plug?
Forum: RV-8/8A 12-01-2017, 12:06 PM
Replies: 7
Views: 872
Posted By DanH
I know what they look like polished ;) Polishing...

I know what they look like polished ;)

Polishing won't help at the attach end, or the wheel end either.
Forum: RV-8/8A 12-01-2017, 07:13 AM
Replies: 7
Views: 872
Posted By DanH
Take 'em back off and add corrosion protection. ...

Take 'em back off and add corrosion protection. Can't do it in place. The highly stressed part of the leg, where it most needs protection, is the end bolted to the fuselage.
Forum: Safety 12-01-2017, 07:04 AM
Replies: 15
Views: 1,673
Posted By DanH
Z-11 will allow the alternator to continue...

Z-11 will allow the alternator to continue output, even if the battery (any battery) is disconnected without pilot command, i.e. BAT/ALT master remains ON. The quality of that output (voltage...
Forum: Traditional Aircraft Engines 11-30-2017, 07:44 AM
Replies: 13
Views: 1,018
Posted By DanH
Just bought a cheap camera that works fine...

Just bought a cheap camera that works fine plugged into my Android phone, or a laptop. Less than $13 delivered. I'll tape it to a bent coat hangar wire.

https://www.tomtop.com/p-h12382.html
Forum: Traditional Aircraft Engines 11-29-2017, 08:32 PM
Replies: 12
Views: 918
Posted By DanH
I'd ask two questions before going further. The...

I'd ask two questions before going further.

The "180F is best" figure is straight from Lycoming engine manuals. Does the 235~245 figure also come from a manufacturer's manual, and is it the...
Forum: Electrical Systems 11-29-2017, 07:37 AM
Replies: 15
Views: 934
Posted By DanH
Jon, did it work?

Jon, did it work?
Forum: RV General Discussion/News 11-28-2017, 08:35 PM
Replies: 21
Views: 1,285
Posted By DanH
Bought three Lightspeeds over the years, but no...

Bought three Lightspeeds over the years, but no more. The quality isn't there.
Forum: Alternative Engines 11-28-2017, 09:45 AM
Replies: 79
Views: 17,120
Posted By DanH
No, it is not impossible. To be blunt,...

No, it is not impossible. To be blunt, engineering and test doesn't get done because most of the folks doing them are ignorant in the dictionary sense (i.e. simply lack the required knowledge),...
Forum: Traditional Aircraft Engines 11-28-2017, 08:10 AM
Replies: 55
Views: 4,318
Posted By DanH
Is this thing constant speed or fixed...

Is this thing constant speed or fixed pitch?

Three pages in, no mention of RPM change, just MP change. Lifters don't care about MP.
Forum: VAF Classifieds (posts in here deleted after 30 days) 11-27-2017, 02:46 PM
Replies: 24
Views: 3,682
Posted By DanH
Naaa, keep the tape. 180 is great. BTW,...

Naaa, keep the tape. 180 is great.

BTW, remember that the senders we're using have a rather poor accuracy tolerance. 5% is 8F plus or minus.
Forum: VAF Classifieds (posts in here deleted after 30 days) 11-27-2017, 02:15 PM
Replies: 24
Views: 3,682
Posted By DanH
Barely gets to 190? Ain't picking on 'ya, but I...

Barely gets to 190? Ain't picking on 'ya, but I detect some wives tails in the air.

Lycoming recommends 180F. The standard vernatherm, if it meets specification, starts closing at 150F, and is...
Forum: RV General Discussion/News 11-26-2017, 11:20 AM
Replies: 4
Views: 610
Posted By DanH
Check with Jay at RV Central, phone number on...

Check with Jay at RV Central, phone number on your left.

Jay has been known to fool with tube and fabric airplanes ;)
Forum: Alternative Engines 11-25-2017, 05:01 PM
Replies: 79
Views: 17,120
Posted By DanH
Let's hear more about the V8!

Let's hear more about the V8!
Forum: Electronic Ignition Systems 11-23-2017, 06:39 AM
Replies: 33
Views: 3,263
Posted By DanH
1/4" perimeter bolts: 96 to 108 inlbs 3/8" case...

1/4" perimeter bolts: 96 to 108 inlbs
3/8" case studs: 25 ftlbs
7/16" case studs: 35 ftlbs
1/2" case studs: 50 ftlbs
Forum: Electronic Ignition Systems 11-22-2017, 05:54 PM
Replies: 171
Views: 47,217
Posted By DanH
Had a note today from Autosport Labs. Want a...

Had a note today from Autosport Labs. Want a Megajolt/E controller for your EDIS-based ignition? Black Friday Sale....15% off. Coupon code ASL15OFF

https://www.autosportlabs.com/
Forum: Alternative Engines 11-22-2017, 05:47 PM
Replies: 79
Views: 17,120
Posted By DanH
Lycoming says an IO-360-A3B6 is 325 lbs w/ mags,...

Lycoming says an IO-360-A3B6 is 325 lbs w/ mags, injection, and starter, dry. No baffles, exhausts, hoses, cooler, or alternators.
Forum: Nosewheel vs. Tailwheel 11-22-2017, 03:49 PM
Replies: 14
Views: 2,123
Posted By DanH
Mel, that's good pay-it-forward advice. I got a...

Mel, that's good pay-it-forward advice.

I got a flight review in a 152. I'd never flown one before. Third landing, the non-tailwheel CFI exclaimed "You don't need to get the nose that high in the...
Forum: Safety 11-22-2017, 09:33 AM
Replies: 205
Views: 15,369
Posted By DanH
Previously I wrote: I've since been doing some...

Previously I wrote:



I've since been doing some research, gathering information about ND units, and dismantling a spare Plane Power alternator. Right now I have a question in with the ND tech...
Forum: RV-8/8A 11-22-2017, 06:40 AM
Replies: 7
Views: 1,177
Posted By DanH
Think about head and face impact back there. ...

Think about head and face impact back there. Strictly opinion, but...

The iPad doesn't look to bad, and gets better if the mount is easily collapsed; no struts please. The standard EFIS appears...
Forum: Electrical Systems 11-20-2017, 06:46 PM
Replies: 71
Views: 5,888
Posted By DanH
....from the other thread. Thanks. You've...

....from the other thread.

Thanks. You've covered the details. Good work!



It could be worthwhile to check some of the ND's for built-in OV protection.
Forum: Safety 11-19-2017, 12:50 PM
Replies: 205
Views: 15,369
Posted By DanH
Only true if the field winding has an internal...

Only true if the field winding has an internal connection to the stator windings, typically via a set of excitation diodes. Mr. Sullivan does not make that clear in...
Forum: Safety 11-19-2017, 07:46 AM
Replies: 205
Views: 15,369
Posted By DanH
Just to confirm...IG only, no other connections,...

Just to confirm...IG only, no other connections, like the photo?



The 20 amps at 14 volts tells the tale, more than enough for self-excitement if there was an internal stator-to-rotor path.
Forum: Safety 11-19-2017, 07:33 AM
Replies: 205
Views: 15,369
Posted By DanH
Excellent. Can you post a part number or other...

Excellent. Can you post a part number or other model ID?



EarthX probably took a $100,000 sales hit to bring the message that OV protection is required. See post#1.



Yes.
Forum: Safety 11-18-2017, 12:57 PM
Replies: 205
Views: 15,369
Posted By DanH
If you trust the Plane Power regulator's built in...

If you trust the Plane Power regulator's built in OV crowbar circuit, nothing additional is required except a 5 amp breaker for the field wire.
Forum: Safety 11-18-2017, 07:25 AM
Replies: 205
Views: 15,369
Posted By DanH
Hardly. As Charlie said, it just means the...

Hardly. As Charlie said, it just means the alternator you're using is not internally wired like the posted...
Forum: Safety 11-17-2017, 08:36 AM
Replies: 205
Views: 15,369
Posted By DanH
You must have missed the memo. It does not pose...

You must have missed the memo. It does not pose a fire hazard. It poses a huge smoke hazard.

Quit fooling around. You want to use an EarthX, then install OV protection as EarthX specifies. ...
Forum: Safety 11-17-2017, 08:26 AM
Replies: 205
Views: 15,369
Posted By DanH
Very general, and doesn't address the stator feed...

Very general, and doesn't address the stator feed to the rotor field.



In the Toyota alternator diagram you posted in the other thread, the stator unquestionably feeds the rotor field. Take...
Forum: Safety 11-16-2017, 07:21 PM
Replies: 205
Views: 15,369
Posted By DanH
I can't speak for everyone, but no, "S" and "B"...

I can't speak for everyone, but no, "S" and "B" are both buss voltage, while "IG" (Terminal 3) is best described as a field lead. With the ignition on, prior to start, it supplies battery voltage...
Forum: Safety 11-16-2017, 03:41 PM
Replies: 205
Views: 15,369
Posted By DanH
Can't speak for the EarthX, but you might fry...

Can't speak for the EarthX, but you might fry some avionics.

Given the low cost and simplicity of OV devices, going without is like trusting a fart.
Forum: Safety 11-16-2017, 05:48 AM
Replies: 205
Views: 15,369
Posted By DanH
The field wire is a power supply. The issue is...

The field wire is a power supply. The issue is how the internal voltage regulator is designed.

Traditional auto alternators of this type draw power via the field wire for initial excitement during...
Forum: RV Building Tips/Techniques 11-15-2017, 08:13 AM
Replies: 12
Views: 1,731
Posted By DanH
In summary... It may or may not be necessary to...

In summary...

It may or may not be necessary to fill the open hole. However, there are potential advantages to filling the open hole, and there is no disadvantage.

I would only add that open...
Forum: Tools 11-15-2017, 07:47 AM
Replies: 11
Views: 641
Posted By DanH
After drilling a test hole in your scrap...

After drilling a test hole in your scrap plexiglass, pull out a 10x magnifier and look close. If there is an issue with your bit or drilling technique, you may find radial cracks not large enough to...
Forum: RV General Discussion/News 11-14-2017, 09:39 AM
Replies: 83
Views: 18,665
Posted By DanH
Normal, typical on both counts, lots of previous...

Normal, typical on both counts, lots of previous discussion in the archives. The rudder is not 100% static balanced.
Forum: RV Building Tips/Techniques 11-13-2017, 04:14 PM
Replies: 48
Views: 11,995
Posted By DanH
I can't see much advantage to a flexible balloon...

I can't see much advantage to a flexible balloon plenum lid as compared to a hard shell lid, except maybe a little less load on the engine attach points, i.e less cracking of the aluminum sheet...
Forum: Fuel Injection Systems 11-13-2017, 10:06 AM
Replies: 11
Views: 1,959
Posted By DanH
Both vendors are staffed with personable people. ...

Both vendors are staffed with personable people. If I had to pick a human-factors question, it would be "Will support continue if the principal is no longer there?"

Moving to the technical side...
Forum: RV General Discussion/News 11-11-2017, 08:23 AM
Replies: 70
Views: 9,881
Posted By DanH
It can be done safely, given the right training...

It can be done safely, given the right training and equipment. As evidence, I offer the story of Ed Long, generally accepted as the highest time pilot in the history of the world (about 65,000...
Forum: RV General Discussion/News 11-11-2017, 07:34 AM
Replies: 33
Views: 3,244
Posted By DanH
Ahhh, note the beard. That's from "Mirror,...

Ahhh, note the beard. That's from "Mirror, Mirror", in which an evil barbarian Spock from an alternative universe sucks McCoy's brain dry to determine how he might dominate and control VAF.
Forum: RV General Discussion/News 11-10-2017, 06:09 PM
Replies: 33
Views: 3,244
Posted By DanH
Ok, I'll bite...what osmosis machine?

Ok, I'll bite...what osmosis machine?
Forum: RV General Discussion/News 11-10-2017, 08:04 AM
Replies: 33
Views: 3,244
Posted By DanH
I'd suggest "number of RVs completed" is not a...

I'd suggest "number of RVs completed" is not a much of a yardstick either. We have guys here who have done multiple custom and race cars. We have aircraft restorers, designers, and multi-time...
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