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Search: Posts Made By: DanH
Forum: Safety Today, 07:59 PM
Replies: 25
Views: 2,827
Posted By DanH
I hope aluminum swage sleeves are not stock, but...

I hope aluminum swage sleeves are not stock, but I also recognize an EAB kit vendor may supply whatever it sees fit, regardless of accepted practice.
Forum: Electronic Ignition Systems Today, 04:04 PM
Replies: 194
Views: 56,157
Posted By DanH
Try: 1000 1500 2000 2100 2200 2300 2400 2500

Try:

1000
1500
2000
2100
2200
2300
2400
2500
Forum: RV-8/8A Today, 03:29 PM
Replies: 13
Views: 2,707
Posted By DanH
My advice is straight from Hitchhiker...Don't...

My advice is straight from Hitchhiker...Don't Panic.

There might be another source of airfoil gear in the not distant future. There might even be beta user slot available for the right guy,...
Forum: Safety Today, 03:10 PM
Replies: 25
Views: 2,827
Posted By DanH
Nobody is perfect, not all the time anyway. ...

Nobody is perfect, not all the time anyway. Think about all the crazy stuff builders do, multiply by all the usual airworthiness issues, and the answer is about 7 digits.

It's not easy guys. I was...
Forum: Places To Fly...Things to See...Things to Eat Yesterday, 03:03 PM
Replies: 1
Views: 201
Posted By DanH
Sounds like a fun fly-out from PJ this fall.

Sounds like a fun fly-out from PJ this fall.
Forum: RV-8/8A Yesterday, 02:06 PM
Replies: 19
Views: 1,343
Posted By DanH
Agree...if the arm ratio is wrong. It can't...

Agree...if the arm ratio is wrong.

It can't unlock if it doesn't reach the release angle.
Forum: RV-8/8A Yesterday, 12:54 PM
Replies: 19
Views: 1,343
Posted By DanH
Slack means most tailwheels, if forced sideways,...

Slack means most tailwheels, if forced sideways, will pop into full swivel. You're allowing the tailwheel fork to swivel farther than the rudder.

Easy test...position your airplane with full rudder...
Forum: RV-4 Yesterday, 07:17 AM
Replies: 7
Views: 723
Posted By DanH
Whatever the cause, kudos to Mike for chasing it...

Whatever the cause, kudos to Mike for chasing it down, and not blowing off the control drag, as we see so many do.
Forum: Traditional Aircraft Engines Yesterday, 07:08 AM
Replies: 9
Views: 837
Posted By DanH
Retarded timing. Timed at the TDC mark rather...

Retarded timing. Timed at the TDC mark rather than the 25 BTDC mark, or timed without tripping dual impulse couplings.

Retarded timing pushes the PV diagram to the right. Pressure and EGT is...
Forum: Electronic Ignition Systems 04-17-2018, 10:30 AM
Replies: 11
Views: 736
Posted By DanH
Blast tubes are required, or a necessary evil, or...

Blast tubes are required, or a necessary evil, or a bad joke, depending on your viewpoint. For sure they are inefficient as a cooling device.

I note that Surefly is not requiring blast tubes. They...
Forum: Traditional Aircraft Engines 04-17-2018, 09:05 AM
Replies: 17
Views: 1,116
Posted By DanH
Looks reasonable to measure the pushrod...

Looks reasonable to measure the pushrod flat-to-flat and add 0.030" to match the listed length. Ya'll measure some and let's see.
Forum: Traditional Aircraft Engines 04-17-2018, 07:05 AM
Replies: 17
Views: 1,116
Posted By DanH
Oh ye of little faith... When jigged in a...

Oh ye of little faith...

When jigged in a fixture this AM, and measured with the trusty digital caliper, my "about 13.000" was 13.005". Both 73555's were the same length.

The flats on both ends of...
Forum: Electronic Ignition Systems 04-17-2018, 06:53 AM
Replies: 11
Views: 736
Posted By DanH
+1 on the intercylinder baffle. Look hard at the...

+1 on the intercylinder baffle. Look hard at the front and rear baffle walls near the cylinder bases too.

Leaks are cumulative.
Forum: Safety 04-17-2018, 05:48 AM
Replies: 42
Views: 3,591
Posted By DanH
Good warning Walt. Somehow folks got thinking...

Good warning Walt. Somehow folks got thinking tefzel wire is fireproof, or low smoke, and it's not.

One demonstration worth 1000 words...everybody torch some wire scraps.
Forum: Safety 04-17-2018, 05:42 AM
Replies: 42
Views: 3,591
Posted By DanH
I suspect a well built fusible link is more...

I suspect a well built fusible link is more reliable than the typical inline fuse holder, which tends to be manufactured to a very low price point. The terminal crimps are molded in; you can't see...
Forum: Traditional Aircraft Engines 04-16-2018, 01:49 PM
Replies: 17
Views: 1,116
Posted By DanH
The two 73555 pushrods on hand measure less flat...

The two 73555 pushrods on hand measure less flat to flat (about 13.000") than the "Approximate Length" listed in 1060K (13.034").

Thinking out loud...

The flats seem to measure 0.1875" diameter. ...
Forum: Traditional Aircraft Engines 04-16-2018, 09:23 AM
Replies: 17
Views: 1,116
Posted By DanH
Measuring Lycoming Pushrod Length

Consider the "Approximate Length" listed in SI-1060S.

Is the given dimension based on the theoretical tip of the hemisphere (top), or is it measured from flat to flat (bottom)? Or is it something...
Forum: Alternative Engines 04-15-2018, 06:52 AM
Replies: 5
Views: 581
Posted By DanH
Returning to Motorav...it is an interesting...

Returning to Motorav...it is an interesting engine, but unless something has changed, there seems to be a disconnect at the customer contact and marketing levels. Proceed with care.
Forum: Traditional Aircraft Engines 04-12-2018, 08:58 AM
Replies: 70
Views: 57,619
Posted By DanH
I suppose you could wait until I get back from...

I suppose you could wait until I get back from S&F.

Photobucket is a dead issue. I may re-link the 1000 or so images, drawings, graphs, etc if we find a more-or-less permanent host.
Forum: RV-8/8A 04-11-2018, 07:06 PM
Replies: 30
Views: 4,064
Posted By DanH
Yes, it has seen all conditions, including OSH....

Yes, it has seen all conditions, including OSH.

We can talk after S&F if you like.
Forum: RV-8/8A 04-10-2018, 05:16 PM
Replies: 30
Views: 4,064
Posted By DanH
Instead of after-fairing the exit chute, you can...

Instead of after-fairing the exit chute, you can elect to remove it, and replace the whole thing with a flush panel, which reduces frontal area, and leaves an exit the width and height of the belly...
Forum: RV-8/8A 04-10-2018, 10:51 AM
Replies: 30
Views: 4,064
Posted By DanH
That didn't work so well. Darn shame...it's...

That didn't work so well. Darn shame...it's pretty glass work.
Forum: RV-10 04-09-2018, 08:54 AM
Replies: 13
Views: 1,122
Posted By DanH
Jack, nothing wrong with those numbers. #5...

Jack, nothing wrong with those numbers.

#5 will need a bypass duct to get it even with the others. Same as the old "washer trick", only better, allows airflow through the top rear fins and feeds...
Forum: Traditional Aircraft Engines 04-09-2018, 06:49 AM
Replies: 43
Views: 2,882
Posted By DanH
That too is interesting. How can one half rotate...

That too is interesting. How can one half rotate significantly, and not move the other half?

Earlier you mentioned 600 hours between cylinder replacement and the teardown resulting in these dowel...
Forum: Traditional Aircraft Engines 04-08-2018, 08:49 AM
Replies: 43
Views: 2,882
Posted By DanH
Gary, jump in the Wayback Machine and consult...

Gary, jump in the Wayback Machine and consult SB's 326A and 327C.

From the SB:

Bearing and dowel failures on these engines can be attributed to movement of the mating surfaces of the crankcase...
Forum: Traditional Aircraft Engines 04-08-2018, 06:55 AM
Replies: 43
Views: 2,882
Posted By DanH
Good article. However, the subject matter (bolt...

Good article. However, the subject matter (bolt tension preload should be more than applied stress in service) is entirely without engineering debate, and has nothing to do with the question at...
Forum: Traditional Aircraft Engines 04-06-2018, 04:08 PM
Replies: 43
Views: 2,882
Posted By DanH
I must back up on a previous statement. Re...

I must back up on a previous statement.

Re cylinder removal, earlier this AM I wrote that the latest manuals specify using the ST-222 plates to keep the rods from flopping around (they have a rubber...
Forum: Traditional Aircraft Engines 04-06-2018, 10:00 AM
Replies: 43
Views: 2,882
Posted By DanH
Tell us more about what we're looking at here. ...

Tell us more about what we're looking at here. Those are dowel pins in their sockets, in the case half, yes? Can you explain a mechanism or series of events which would somehow beat the snot out of...
Forum: Traditional Aircraft Engines 04-06-2018, 08:23 AM
Replies: 43
Views: 2,882
Posted By DanH
The cylinder base o-rings don't seal against the...

The cylinder base o-rings don't seal against the flat part of the case spigot. I can think of several reasons why I would not want the case flats to be damaged, but leaks are not on the list.

The...
Forum: Electrical Systems 04-05-2018, 05:49 PM
Replies: 33
Views: 1,874
Posted By DanH
The two switches are turned on at start. Cycle...

The two switches are turned on at start. Cycle them on the runup pad to confirm both power sources. There is never any in-flight diagnosis or switching to maintain engine power.

Zuldarin's: ...
Forum: Electrical Systems 04-05-2018, 05:15 AM
Replies: 33
Views: 1,874
Posted By DanH
The example on the right requires no pilot...

The example on the right requires no pilot intervention, no in-flight switch flipping to maintain a turning prop. Smoke in the cockpit, for example, requires only killing the master switch(es), a...
Forum: Electrical Systems 04-04-2018, 07:09 PM
Replies: 33
Views: 1,874
Posted By DanH
Sure. Note this popular maxim, from...

Sure.

Note this popular maxim, from Saint-Exupery:

..perfection is finally attained not when there is no longer anything to add, but when there is no longer anything to take away...

Now consider...
Forum: Electrical Systems 04-04-2018, 12:10 PM
Replies: 33
Views: 1,874
Posted By DanH
After all, 90% of us are above average. Really...

After all, 90% of us are above average.



Really good architecture for EFI/EI power doesn't have anything to do with the master switch. Master on, off, or broken, the engine should continue to run....
Forum: Electrical Systems 04-04-2018, 09:48 AM
Replies: 33
Views: 1,874
Posted By DanH
Let's see some architecture. BTW, let's not...

Let's see some architecture.

BTW, let's not focus on IFR. The issue here is keeping the engine running without interruption....anytime, anywhere.

The best system would not require a type...
Forum: RV General Discussion/News 04-04-2018, 06:56 AM
Replies: 18
Views: 1,137
Posted By DanH
A word for the tri-gear clan....S&F has very long...

A word for the tri-gear clan....S&F has very long taxi routes to HBC, in particular if landing on 27R. Do all you can to save your brakes.
Forum: Electrical Systems 04-04-2018, 06:47 AM
Replies: 33
Views: 1,874
Posted By DanH
A good design has no "Oh ****" switch to keep the...

A good design has no "Oh ****" switch to keep the engine running. Engine electronics need dual power or auto switching.

The airplane is at 200 feet, the departure end just went under the wing, and...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 04-03-2018, 12:14 PM
Replies: 12
Views: 1,476
Posted By DanH
Hey...the deck is bass-ackwards! Must be from an...

Hey...the deck is bass-ackwards!

Must be from an alternate reality.
Forum: RV General Discussion/News 04-03-2018, 06:02 AM
Replies: 19
Views: 1,193
Posted By DanH
Make a tool... http://i64.tinypic.com/10hugs4.jpg

Make a tool...

http://i64.tinypic.com/10hugs4.jpg
Forum: Electronic Ignition Systems 04-02-2018, 06:20 AM
Replies: 155
Views: 18,167
Posted By DanH
Patrick, have the failures been convincingly tied...

Patrick, have the failures been convincingly tied to temperature, i.e. the temperature tell-tales clearly show the P-mag was heated beyond it's limits? Or is overheating an assumption based on lack...
Forum: Electrical Systems 04-01-2018, 11:47 AM
Replies: 10
Views: 701
Posted By DanH
I'll refrain from specific comment on components...

I'll refrain from specific comment on components and arrangement.

I would like to compliment your method, i.e. the concept of mapping out architecture before proceeding to detailed wiring.

A...
Forum: RV-10 04-01-2018, 11:19 AM
Replies: 36
Views: 2,690
Posted By DanH
Gil, Greg is speaking of something like the...

Gil, Greg is speaking of something like the standard exit radius on an -8. You've seen the idea adapted to other models.

The -8 has an exit ramp inset into the belly, so the inset has sidewalls. ...
Forum: RV General Discussion/News 03-31-2018, 11:03 AM
Replies: 7
Views: 1,479
Posted By DanH
Things a fella learns on VAF are...

Things a fella learns on VAF are endless.....

http://www.abeepestpro.com/differences-types-of-pest-droppings-poop.htm
Forum: Electronic Ignition Systems 03-30-2018, 02:00 PM
Replies: 12
Views: 1,435
Posted By DanH
I second the motion. Contact Emagair and ask.

I second the motion. Contact Emagair and ask.
Forum: RV-10 03-30-2018, 05:51 AM
Replies: 11
Views: 938
Posted By DanH
Aluminum tube for fixed lines, teflon/SS when...

Aluminum tube for fixed lines, teflon/SS when connected to anything that moves.
Forum: Electronic Ignition Systems 03-29-2018, 11:57 AM
Replies: 194
Views: 56,157
Posted By DanH
Scott, I'll revise the drawing for the internal...

Scott,

I'll revise the drawing for the internal ring, and send one with both the original diameter and the slightly increased OD Graham preferred.
Forum: Traditional Aircraft Engines 03-29-2018, 09:41 AM
Replies: 20
Views: 6,749
Posted By DanH
Yep, excellent. Filtered vs filtered on the...

Yep, excellent.

Filtered vs filtered on the takeoff roll is a direct comparison, given (hopefully) equal conditions.

Be sure to record pressure altitude (set 29.92), OAT, and a true airspeed for...
Forum: Electronic Ignition Systems 03-29-2018, 07:45 AM
Replies: 194
Views: 56,157
Posted By DanH
Good. Send a copy back to me too, so I don't...

Good. Send a copy back to me too, so I don't need to redraw.
Forum: RV General Discussion/News 03-28-2018, 05:39 PM
Replies: 12
Views: 968
Posted By DanH
Because they didn't throw it out.

Because they didn't throw it out.
Forum: Electronic Ignition Systems 03-28-2018, 05:41 AM
Replies: 194
Views: 56,157
Posted By DanH
You're welcome to them, but they must be on my...

You're welcome to them, but they must be on my hard drive at the office. Can't find them here at home. I'll look later today.

In the meantime, I know I sent copies to Mike Starkey and Graham in Oz...
Forum: RV General Discussion/News 03-28-2018, 05:38 AM
Replies: 6
Views: 514
Posted By DanH
Adam, Order this. Read it twice, at...

Adam,

Order this. Read it twice, at least.

http://www.aircraftspruce.com/catalog/bvpages/moldless.php?clickkey=23413
Forum: RV-12 03-27-2018, 02:23 PM
Replies: 21
Views: 1,635
Posted By DanH
No-brainer. CV Bings are very simple, and have...

No-brainer.

CV Bings are very simple, and have not really changed in 40 years.

Worst case, you throw them in a box later and ship them to a shop.

FYI...We lost a 2 stroke Kitfox here some...
Forum: Traditional Aircraft Engines 03-27-2018, 06:29 AM
Replies: 12
Views: 1,279
Posted By DanH
+1, and do recall we're moving into an era of...

+1, and do recall we're moving into an era of changing fuels.
Forum: RV-10 03-26-2018, 11:51 AM
Replies: 25
Views: 2,396
Posted By DanH
It wasn't, and I must apologize for my previous...

It wasn't, and I must apologize for my previous comment. I was being brain dead. A post I assumed to be deleted was actually in the other thread for this airplane.
Forum: RV-10 03-26-2018, 08:58 AM
Replies: 25
Views: 2,396
Posted By DanH
Some moderator is being a bit overzealous today. ...

Some moderator is being a bit overzealous today. Seriously, a deletion due to technical comment?
Forum: RV-10 03-26-2018, 07:41 AM
Replies: 26
Views: 3,102
Posted By DanH
Well done sir. It's nice to see one take flight...

Well done sir. It's nice to see one take flight fully finished. The workmanship looks good.



With a Bower system, the "1" or better" gain is the difference between (a) lower cowl pressure while...
Forum: Electrical Systems 03-24-2018, 07:10 AM
Replies: 43
Views: 3,494
Posted By DanH
Work through basic failure analysis. Wires and...

Work through basic failure analysis. Wires and devices fail short or open. Make a wire list, mentally short or open each of them, and think about the result.

For example, let's short wire #6. ...
Forum: Aircraft Camping 03-23-2018, 09:32 AM
Replies: 42
Views: 6,719
Posted By DanH
HBC parking procedure is pretty much like OSH,...

HBC parking procedure is pretty much like OSH, but the area is waaaay smaller, so not much concern about walking distance.
Forum: Aircraft Camping 03-23-2018, 05:29 AM
Replies: 42
Views: 6,719
Posted By DanH
I'm hoping for a few days early in the week.

I'm hoping for a few days early in the week.
Forum: RV-10 03-22-2018, 07:37 AM
Replies: 21
Views: 2,443
Posted By DanH
The stock stops shear the rivets (empty holes in...

The stock stops shear the rivets (empty holes in the photo) attaching them to the hinge bracket? Got it. No fundamental change to the load path into the aircraft structure.
Forum: RV-10 03-21-2018, 04:25 PM
Replies: 21
Views: 2,443
Posted By DanH
BTW, Scott is this month's centerfold in...

BTW, Scott is this month's centerfold in Kitplanes. You'll find an account of his adventures to date, and future plans.

As a bonus, Continental was kind enough to grant access to their development...
Forum: RV-10 03-21-2018, 06:07 AM
Replies: 21
Views: 2,443
Posted By DanH
And you believe the internal rudder stop is...

And you believe the internal rudder stop is structurally better?
Forum: Traditional Aircraft Engines 03-21-2018, 06:05 AM
Replies: 14
Views: 825
Posted By DanH
Parallel valve or angle valve?

Parallel valve or angle valve?
Showing results 1 to 62 of 500

 
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