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Search: Posts Made By: DanH
Forum: RV Ongoing Maintenance Issues Yesterday, 07:12 PM
Replies: 58
Views: 4,249
Posted By DanH
I've ignored all recent "pooled fuel can cause an...

I've ignored all recent "pooled fuel can cause an exploding sump" anecdotes, as I wanted to do some reading first. After all, challenging the collective wisdom of the airport front porch is a task...
Forum: RV Ongoing Maintenance Issues 01-27-2020, 06:42 PM
Replies: 58
Views: 4,249
Posted By DanH
True, there is a margin case. Pressure rise in...

True, there is a margin case. Pressure rise in the waste spark cylinder would not be significant, but it would not be zero either....and opposing cylinder pressures would be additive. Assume...
Forum: RV General Discussion/News 01-27-2020, 09:13 AM
Replies: 20
Views: 1,666
Posted By DanH
Mitch, it's not strictly required, just one of...

Mitch, it's not strictly required, just one of those "a little better" details.

I have a bead roller, for which I machine whatever roll forms are needed. This picture is an early test of a setup...
Forum: RV Ongoing Maintenance Issues 01-26-2020, 10:54 PM
Replies: 58
Views: 4,249
Posted By DanH
Scott, consider the waste spark, arriving at the...

Scott, consider the waste spark, arriving at the top of the exhaust stroke, or a little before. Both valves are open, thus it's not possible to generate significant cylinder pressure. Even if a...
Forum: RV General Discussion/News 01-26-2020, 10:10 AM
Replies: 10
Views: 2,749
Posted By DanH
Sorry, but I'm not taking in work right now. ...

Sorry, but I'm not taking in work right now. Paul Beck, or Hotel Whiskey, or ask Vic.

As I understand Paul's process, he chemically strips all the old sealant.
Forum: RV Ongoing Maintenance Issues 01-26-2020, 08:55 AM
Replies: 58
Views: 4,249
Posted By DanH
Annual time, so as promised, I stuck a borescope...

Annual time, so as promised, I stuck a borescope down the fuel servo and intake throat to look in the sump plenum. Ran it for a hot leakdown, then took the photo 30~60 minutes after shutdown.

For...
Forum: RV General Discussion/News 01-26-2020, 07:15 AM
Replies: 20
Views: 1,666
Posted By DanH
Those were brand new QB tanks, vintage 2005. ...

Those were brand new QB tanks, vintage 2005. They were indeed a mess, but that's another story.

Closed end pop rivets, installed wet. ...
Forum: RV General Discussion/News 01-26-2020, 06:51 AM
Replies: 3
Views: 303
Posted By DanH
I assume you are speaking of a clogged drain. ...

I assume you are speaking of a clogged drain. Not known to clog on a regular basis. That said, it is fundamentally a can with three spigots, so you can be sure in less than 5 minutes. Sure is...
Forum: RV General Discussion/News 01-25-2020, 07:01 PM
Replies: 20
Views: 1,666
Posted By DanH
Gregg, Cut access ports in the rear wall,...

Gregg,

Cut access ports in the rear wall, re-seal as necessary, live happily ever...
Forum: RV-8/8A 01-24-2020, 02:17 PM
Replies: 920
Views: 634,935
Posted By DanH
Just skim with epoxy or whatever surface sealing...

Just skim with epoxy or whatever surface sealing method you choose. Mine was skimmed once to seal then sprayed with a few costs of K36.

Were I to build another, I'd add a few plies of carbon to the...
Forum: Propellers 01-24-2020, 11:53 AM
Replies: 12
Views: 760
Posted By DanH
I switched to Aeroshell 5. I could not keep the...

I switched to Aeroshell 5. I could not keep the oil content from running out of the open Aeroshell 6 tube while stored in the grease gun, after which it wouldn't pump.
Forum: Safety 01-24-2020, 11:39 AM
Replies: 14
Views: 5,197
Posted By DanH
Apparently...now reads "four".

Apparently...now reads "four".
Forum: Electronic Ignition Systems 01-23-2020, 10:19 PM
Replies: 255
Views: 87,759
Posted By DanH
Seriously, I built those things four years ago,...

Seriously, I built those things four years ago, and don't remember exactly what I did. I think you have a handle on it.
Forum: RV General Discussion/News 01-21-2020, 12:03 PM
Replies: 17
Views: 3,168
Posted By DanH
Thank you. Had to build them myself, can't...

Thank you. Had to build them myself, can't afford to buy one. Ms. Patti says I definitely can't afford a 30-year old girlfriend.
Forum: Fiberglass 01-21-2020, 07:38 AM
Replies: 20
Views: 9,433
Posted By DanH
My flush choice too. Tinnermans? Yuk. The tank...

My flush choice too. Tinnermans? Yuk.

The tank screw idea is pretty slick.

I'm sure it costs me a milliknot or two, but on glass I generally use stainless AN526 screws and a nylon washer. No...
Forum: RV-8/8A 01-21-2020, 07:25 AM
Replies: 10
Views: 724
Posted By DanH
Now that you ask, I don't think so. Nothing...

Now that you ask, I don't think so.

Nothing handy to compare.

I assume the tumblehome observation comes from your existing slider? None of my photos show any at the rear of this canopy.
Forum: RV-8/8A 01-20-2020, 04:55 PM
Replies: 10
Views: 724
Posted By DanH
I'm using a standard Vans canopy, circa 2006. It...

I'm using a standard Vans canopy, circa 2006. It has been glued into that glass frame 10 years or more, no issues.

As Stu suggested, I think a lot of the tumblehome gets cut off. That said, I cut...
Forum: Traditional Aircraft Engines 01-19-2020, 10:26 PM
Replies: 16
Views: 1,602
Posted By DanH
Mike, I don't have a Showplanes cowl. Mine is a...

Mike, I don't have a Showplanes cowl. Mine is a modified Vans cowl. Any angle valve in a stock RV-8 cowl is tight along the left side, and over the front corners.
Forum: Traditional Aircraft Engines 01-18-2020, 08:25 PM
Replies: 16
Views: 1,602
Posted By DanH
Blame Lycoming. After developing the concept...

Blame Lycoming.

After developing the concept using machined 360 cases, Barrett initially held a contractual exclusive on Lycoming IO-390 engine kits. Then there was a period with kits available to...
Forum: RV General Discussion/News 01-16-2020, 07:04 AM
Replies: 11
Views: 885
Posted By DanH
Sure......

Sure......
Forum: RV Ongoing Maintenance Issues 01-15-2020, 08:32 AM
Replies: 58
Views: 4,249
Posted By DanH
Tell us about the exit. Intake water is one...

Tell us about the exit. Intake water is one thing, but I assume you don't approve of dumping priming fuel into the lower cowl.

Sometimes a sniffle drain can be tricky. Here's an example, circa...
Forum: Electronic Ignition Systems 01-14-2020, 05:16 PM
Replies: 255
Views: 87,759
Posted By DanH
Had a private note with a very good suggestion. ...

Had a private note with a very good suggestion. The trigger body could have an oil weep hole to vent the bearing space. It would offer an early indication of oil seal failure. Although oil is...
Forum: RV Ongoing Maintenance Issues 01-14-2020, 11:35 AM
Replies: 58
Views: 4,249
Posted By DanH
The risk of water ingestion remains with a...

The risk of water ingestion remains with a horizontal induction and any fuel system choice.

As for EFI, I have seen a bent connecting rod taken from a GM 6.0L, attributed to hydraulic lock after a...
Forum: RV Ongoing Maintenance Issues 01-14-2020, 09:23 AM
Replies: 58
Views: 4,249
Posted By DanH
Then it is common to see a bit of fuel in the air...

Then it is common to see a bit of fuel in the air plenum, and from the sniffle.

The engine driven pump creates line pressure by pushing a diaphragm with a big spring. The engine's pump cam (via the...
Forum: Electronic Ignition Systems 01-14-2020, 07:58 AM
Replies: 255
Views: 87,759
Posted By DanH
No grub screws for me. Both the trigger wheel...

No grub screws for me. Both the trigger wheel and the bearing collar are a light press fit locked with ASME B18.8.2 split pins in double shear, 0.125"D.

The idea was to create a cartridge, a...
Forum: RV Ongoing Maintenance Issues 01-13-2020, 04:04 PM
Replies: 58
Views: 4,249
Posted By DanH
It is not. It's a check valve. It seals at low...

It is not. It's a check valve. It seals at low manifold pressure, but could just as well be an open fitting at WOT, given a good ram inlet.
Forum: RV Ongoing Maintenance Issues 01-13-2020, 11:54 AM
Replies: 58
Views: 4,249
Posted By DanH
Both you guys are using a constant flow injection...

Both you guys are using a constant flow injection without a purge valve?
Forum: RV General Discussion/News 01-13-2020, 10:43 AM
Replies: 17
Views: 3,168
Posted By DanH
Quick update; both units doing fine. One of my...

Quick update; both units doing fine.

One of my buds was dragging his S7 three weeks after knee replacements. Me like.
Forum: RV Ongoing Maintenance Issues 01-13-2020, 07:37 AM
Replies: 58
Views: 4,249
Posted By DanH
Enclosed space. Where is the required oxygen? ...

Enclosed space. Where is the required oxygen?



No matter, as our sumps are designed are to be unharmed. For sure a sniffle doesn't prevent the occasional "thump from the sump", or air filter...
Forum: VAF Classifieds (posts in here deleted after 30 days) 01-13-2020, 06:11 AM
Replies: 4
Views: 341
Posted By DanH
A plenum lid is easy. The key issue is how it is...

A plenum lid is easy. The key issue is how it is sealed to the cowl inlet.
Forum: Electronic Ignition Systems 01-13-2020, 06:10 AM
Replies: 22
Views: 2,283
Posted By DanH
There are no totally, absolutely risk-free...

There are no totally, absolutely risk-free ignitions. Let's focus on operating and performance differences.
Forum: RV Ongoing Maintenance Issues 01-12-2020, 10:46 AM
Replies: 58
Views: 4,249
Posted By DanH
Explosion risk is a function of fuel-air ratio by...

Explosion risk is a function of fuel-air ratio by weight. Fuel in liquid phase has no practical explosion risk. The fuel of interest is that which is in vapor phase, above the liquid, and combined...
Forum: RV Ongoing Maintenance Issues 01-12-2020, 08:05 AM
Replies: 58
Views: 4,249
Posted By DanH
Last time I looked in there, it was bone dry. ...

Last time I looked in there, it was bone dry. Annual time right now; I'll look again. Not much need to guess, given most of us have some kind of tiny camera on a stick. Open the throttle and poke...
Forum: Traditional Aircraft Engines 01-12-2020, 06:50 AM
Replies: 14
Views: 1,008
Posted By DanH
Typically not wired.

Typically not wired.
Forum: RV General Discussion/News 01-10-2020, 05:15 PM
Replies: 7
Views: 1,007
Posted By DanH
Snail mail an order form. Use tax is 2%, if Vans...

Snail mail an order form. Use tax is 2%, if Vans doesn't collect.

BTW, the 2% "automotive" category means...

810-6-1-.12. Automotive Vehicles.
(1) The term "automotive vehicles" as used in the...
Forum: Electronic Ignition Systems 01-10-2020, 11:30 AM
Replies: 15
Views: 1,026
Posted By DanH
Ross, Could you expand on the effects of normal...

Ross,

Could you expand on the effects of normal operation vs current saving mode?

Using the 4-cyl example, 2.09 amps vs 0.77 is significant. I assume the difference is entirely primary current,...
Forum: My RV Build Project 01-10-2020, 07:08 AM
Replies: 461
Views: 244,125
Posted By DanH
Ditch the syringes Dave. Get something like wide...

Ditch the syringes Dave. Get something like wide mouth condiment squirt bottles for hardener, and a 1 qt pour bottle for resin...something easy to refill from the can.

An electronic scale is great,...
Forum: RV-14 01-10-2020, 06:07 AM
Replies: 22
Views: 3,027
Posted By DanH
Dave, being new to the forum, here's an important...

Dave, being new to the forum, here's an important clue...When asking for "best", most of the advice you'll get is based on pride of ownership, not critical analysis.
Forum: Glass Cockpit 01-09-2020, 03:35 PM
Replies: 30
Poll: EFIS Poll
Views: 2,157
Posted By DanH
Methinks the poll questions will just result in a...

Methinks the poll questions will just result in a market share snapshot.
Forum: RV General Discussion/News 01-09-2020, 02:38 PM
Replies: 7
Views: 611
Posted By DanH
Two-part matte clear. Shoot multiple coats to...

Two-part matte clear. Shoot multiple coats to build thickness, then block sand wet with 800-1000 grit to remove the high spots over the labels, plus any flaws/dust/nibs. Shoot one more final coat. ...
Forum: Fiberglass 01-09-2020, 02:32 PM
Replies: 11
Views: 1,102
Posted By DanH
Don't sneeze. ;) Seriously, big coffee can and a...

Don't sneeze. ;)

Seriously, big coffee can and a tablespoon. Micro in a bag is always messy.
Forum: Safety 01-07-2020, 08:51 AM
Replies: 15
Views: 1,118
Posted By DanH
Paul, Two lbs/sec cooling flow and 900 grams per...

Paul,

Two lbs/sec cooling flow and 900 grams per m^3 are rough worst case estimates which assume cruise speed, and a Halon replacement requiring roughly double the concentration. And you should not...
Forum: RV General Discussion/News 01-06-2020, 07:13 PM
Replies: 34
Views: 4,591
Posted By DanH
GM Silver Birch on top, and a generic white pearl.

GM Silver Birch on top, and a generic white pearl.
Forum: Traditional Aircraft Engines 01-06-2020, 03:09 PM
Replies: 17
Views: 2,189
Posted By DanH
So the intent with this technique is to remove...

So the intent with this technique is to remove all the oil, leaving the debris more evident on the filter paper?
Forum: Safety 01-06-2020, 02:54 PM
Replies: 15
Views: 1,118
Posted By DanH
There are a few ways to look at the question. ...

There are a few ways to look at the question. Perhaps one is from the standpoint of mass flow. The Lycoming charts suggest most RVs are flowing 1.5 to 2 lbs of air per second. Let's go with 2 lbs...
Forum: Traditional Aircraft Engines 01-06-2020, 11:19 AM
Replies: 17
Views: 2,189
Posted By DanH
Tim, A little more steel on the magnet than I...

Tim,

A little more steel on the magnet than I like to see, but well within Lycoming guidelines. Fly it more, cut another filter.

Opinion worth what you paid for it ;)




Wash jar with a magnet...
Forum: RV General Discussion/News 01-05-2020, 07:31 PM
Replies: 34
Views: 4,591
Posted By DanH
Nice evening in Alabama, so I got in some...

Nice evening in Alabama, so I got in some formation practice. Quick over the shoulder shot from Stan Tew, passenger in Kirk Harrell's Mustang...
Forum: VAF Classifieds (posts in here deleted after 30 days) 01-05-2020, 07:42 AM
Replies: 2
Views: 212
Posted By DanH
Make sure it is a later model dock with a slot in...

Make sure it is a later model dock with a slot in the left side for the data connector. Early docks had no slot, and contact would knock the socket off the board internally.
Forum: Electronic Ignition Systems 01-02-2020, 07:58 AM
Replies: 255
Views: 87,759
Posted By DanH
I've slept since then, but pretty sure it is...

I've slept since then, but pretty sure it is 3-conductor shielded 18, straight from the Spruce catalog.



Nice.
Forum: RV General Discussion/News 01-02-2020, 07:28 AM
Replies: 22
Views: 2,986
Posted By DanH
It might take more than one issue to develop a...

It might take more than one issue to develop a true picture of editorial viewpoint. As a new subscriber, you have access to past issues; read the last 24 or so and see if you feel the same.
Forum: Close Calls / Lessons Learned 12-30-2019, 02:24 PM
Replies: 44
Views: 5,008
Posted By DanH
I believe you John. I'm sure no one disputes...

I believe you John. I'm sure no one disputes that the disc gets quite hot.

The proven way to reduce maximum disc temperature for any given braking situation is to increase disc mass...see the...
Forum: Close Calls / Lessons Learned 12-30-2019, 08:45 AM
Replies: 44
Views: 5,008
Posted By DanH
I dismiss the notion that cooling air scoops on...

I dismiss the notion that cooling air scoops on the wheelpants would be useful. They would not improve braking power or safety margin during a typical single stop landing, nor prevent fire if...
Forum: Close Calls / Lessons Learned 12-29-2019, 02:45 PM
Replies: 44
Views: 5,008
Posted By DanH
Let's not get carried away here. The brakes are...

Let's not get carried away here.

The brakes are rated by the amount of kinetic energy they can absorb in the form of heat. Maintain energy <= rating, and they are just fine.

Most RV's have...
Forum: Fiberglass 12-29-2019, 06:54 AM
Replies: 31
Views: 2,130
Posted By DanH
The foam roller leaves an even orange peel...

The foam roller leaves an even orange peel finish. Just sand until the orange peel is gone.
Forum: Fiberglass 12-28-2019, 02:46 PM
Replies: 31
Views: 2,130
Posted By DanH
Precisely.

Precisely.
Forum: Fiberglass 12-28-2019, 08:10 AM
Replies: 31
Views: 2,130
Posted By DanH
The divots and pinholes are due to air entrained...

The divots and pinholes are due to air entrained in the dry micro while mixing. A really dry mix will hold every bubble, while a wet mix will allow the bubbles to float to the top. I would not go...
Forum: RV General Discussion/News 12-27-2019, 09:29 AM
Replies: 19
Views: 1,530
Posted By DanH
I've flown a lot of 3 to 4 hr legs in mine, at...

I've flown a lot of 3 to 4 hr legs in mine, at 180 KTAS or more. I'm 6-3 and about 225.

Don't neglect variations on the base model. The Showplanes tip over includes narrowed cockpit rails, the...
Forum: RV-8/8A 12-27-2019, 07:53 AM
Replies: 11
Views: 1,014
Posted By DanH
Phillip, Pat's Full Up Auto Stop kit would be...

Phillip, Pat's Full Up Auto Stop kit would be worthwhile in an -8, as it would free your left hand for other things, like re-trimming. A solo RV-8 is typically trimmed far rearward for final...
Forum: RV-7/7A 12-25-2019, 08:04 AM
Replies: 64
Views: 7,403
Posted By DanH
These numbers (and of course certified prices)...

These numbers (and of course certified prices) are the key factor driving used RV values.

So, be of good cheer. Most of us thought our new RVs were too expensive back when, but now a nice one...
Forum: My RV Build Project 12-24-2019, 07:28 AM
Replies: 29
Views: 2,381
Posted By DanH
Your size estimates will work. Strongly...

Your size estimates will work. Strongly recommend white painted drywall, and a lot of insulation, wall and ceiling. Install enough lights to blind the unwary.

Climate control is huge. Upsize the...
Forum: RV Photo/Video URLs 12-23-2019, 11:05 PM
Replies: 4
Views: 728
Posted By DanH
Mehrdad, the specification of interest for a hot...

Mehrdad, the specification of interest for a hot application would be Tg, the glass transition temperature of the epoxy in use. It's the temperature at which the solid epoxy changes from hard to...
Forum: RV Photo/Video URLs 12-23-2019, 08:19 AM
Replies: 4
Views: 728
Posted By DanH
All the basics are there. Do remember the...

All the basics are there.

Do remember the Golden Rule of Forms and Molds....time spent creating a really accurate, well finished mold or form pays large dividends later...less sanding, less...
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