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Search: Posts Made By: hgerhardt
Forum: RV General Discussion/News Today, 04:52 PM
Replies: 21
Views: 457
Posted By hgerhardt
I have an R1150RT and don't ride it nearly as...

I have an R1150RT and don't ride it nearly as much as pre-RV, so the airplane definitely takes time away from riding. But even though I consider the RV to be a 'motorcycle with a Z-axis', they are...
Forum: RV-14 04-03-2021, 06:09 PM
Replies: 1
Views: 435
Posted By hgerhardt
I had exactly the same situation with my IO-360...

I had exactly the same situation with my IO-360 back in 2003, so this is not Thunderbolt-specific. I cut the flare off and shortened that last segment by a bit and re-flared. But being able to buy a...
Forum: California 04-02-2021, 02:36 PM
Replies: 21
Views: 984
Posted By hgerhardt
Oceano (L52) has a BBQ restaurant in 2 old train...

Oceano (L52) has a BBQ restaurant in 2 old train cars within walking distance. Food ain't fantastic, but the airport is nice. Camping on the field too. This is all pre-covid, so who knows what the...
Forum: Traditional Aircraft Engines 03-24-2021, 01:16 PM
Replies: 14
Views: 959
Posted By hgerhardt
It's a GM Metri-Pack 150 sensor connector as...

It's a GM Metri-Pack 150 sensor connector as available at Ballenger Motorsports (https://www.bmotorsports.com/shop/product_info.php/products_id/501). My Silverado happens to use the same connector on...
Forum: RV Ongoing Maintenance Issues 03-21-2021, 11:01 PM
Replies: 28
Views: 5,207
Posted By hgerhardt
Allan, whatever became of that "$29 valve spring...

Allan, whatever became of that "$29 valve spring compressor" you talked about last year?
Forum: RV General Discussion/News 03-12-2021, 01:34 PM
Replies: 6
Views: 1,970
Posted By hgerhardt
Something to keep in mind is the SW 8432R oil...

Something to keep in mind is the SW 8432R oil cooler is used as an aux or secondary cooler on Robinson R-44's. I got my like-new one off ebay for ~$200 from a parted-out -44.

Anyone priced out a new...
Forum: RV Building Tips/Techniques 03-10-2021, 01:03 PM
Replies: 6
Views: 742
Posted By hgerhardt
Yeah, no kidding. I made my FWF harness from...

Yeah, no kidding. I made my FWF harness from Tefzel wiring inside of heatshrink tubing, back in 2003 on my -6. I also added (6) extra (spare) 20ga single-conductor wires plus a 20ga shielded twisted...
Forum: Alternative Engines 03-07-2021, 11:38 PM
Replies: 95
Views: 9,140
Posted By hgerhardt
Actually the quoted 360 lbs doesn't include...

Actually the quoted 360 lbs doesn't include intercooler and radiator with 2-3 gals coolant which would put it around 400 lbs installed.

But, with Van's being Lycoming's biggest customer (or close...
Forum: Traditional Aircraft Engines 03-02-2021, 01:00 PM
Replies: 22
Views: 2,285
Posted By hgerhardt
It's actually called a "gland nut".

It's actually called a "gland nut".
Forum: Traditional Aircraft Engines 02-02-2021, 09:04 PM
Replies: 5
Views: 1,053
Posted By hgerhardt
Why does it need to be steel? Aluminum would be...

Why does it need to be steel? Aluminum would be fine if it's sized appropriately. That way you can make it longer to pick up the next bolt boss to the rear to help with alignment and make it stronger...
Forum: California 02-02-2021, 06:03 PM
Replies: 6
Views: 469
Posted By hgerhardt
Alright, see ya then!

Alright, see ya then!
Forum: California 02-02-2021, 12:56 PM
Replies: 6
Views: 469
Posted By hgerhardt
Tim, I have a -6 in 2729H you can check out too....

Tim, I have a -6 in 2729H you can check out too. Let me know when you'd like to meet. I live 10 min away.

Heinrich
Forum: RV General Discussion/News 01-17-2021, 08:18 PM
Replies: 19
Views: 3,428
Posted By hgerhardt
Flew 'around the block' with the A/C on... it was...

Flew 'around the block' with the A/C on... it was 80F at 2000'. Crazy warm for SoCal in mid-January!
Forum: RV Ongoing Maintenance Issues 01-05-2021, 05:59 PM
Replies: 32
Views: 3,886
Posted By hgerhardt
I have that exact unit. Works great, but even...

I have that exact unit. Works great, but even better if you pull out the rubber seal from the filter 1st!

Instead of putting the cutter in the vise, put the hex of the filter in the vise with the...
Forum: RV-7/7A 01-04-2021, 09:05 AM
Replies: 5
Views: 806
Posted By hgerhardt
I got tired of putting ballast bags on the horiz...

I got tired of putting ballast bags on the horiz stab spar of my -6 when jacking and installed a 3/8-16 "calk-in...
Forum: RV Ongoing Maintenance Issues 01-01-2021, 11:10 AM
Replies: 38
Views: 4,446
Posted By hgerhardt
Have you ever measured temp at the remote-mounted...

Have you ever measured temp at the remote-mounted filter and associated plumbing after using the sump heater? Suspect that very little of that heat conducts to the filter/housing.

Also, provided...
Forum: RV Ongoing Maintenance Issues 12-30-2020, 08:28 PM
Replies: 63
Views: 8,558
Posted By hgerhardt
Now that we know mosfets control the connection...

Now that we know mosfets control the connection to the battery, seems a fairly trivial task for EarthX (or someone) to make the BMS such that it limits and tailors charging for max life regardless of...
Forum: Safety 12-21-2020, 08:36 PM
Replies: 28
Views: 3,195
Posted By hgerhardt
Don't be so quick to discount trapped oil...

Don't be so quick to discount trapped oil expansion pressure rise. I bet your cylinder had the piston bottomed out with no room to expand, causing the pressure within the vessel to spike...
Forum: Traditional Aircraft Engines 12-14-2020, 06:53 PM
Replies: 9
Views: 1,646
Posted By hgerhardt
It's supposed to look like that. Those "features"...

It's supposed to look like that. Those "features" are there to help guide the starter teeth into the ring gear when the solenoid pushes the gear forward.
Forum: Traditional Aircraft Engines 12-11-2020, 12:11 PM
Replies: 35
Views: 11,714
Posted By hgerhardt
Nope, I used 518 without thread as I mentioned...

Nope, I used 518 without thread as I mentioned above in 2008 when I overhauled the engine and it's still dry. Granted, it only has 12.5 yrs and 760 hrs since OH, but still that's a reasonable amount...
Forum: RV-10 12-05-2020, 06:38 PM
Replies: 13
Views: 1,262
Posted By hgerhardt
The soap-based stuff gets most of the exhaust...

The soap-based stuff gets most of the exhaust residue off, but to get it perfect, I use a cleaner-wax like this: https://www.amazon.com/Meguiars-Cleaner-Wax-Liquid-Protects/dp/B0002NYE5M
I should add...
Forum: Traditional Aircraft Engines 11-16-2020, 09:28 AM
Replies: 7
Views: 1,389
Posted By hgerhardt
Looks to me more like a crankcase nose seal leak...

Looks to me more like a crankcase nose seal leak based on all the oil on/between the front ramp baffle.

You could isolate the pushrod shroud seal by cleaning everything up and then wrapping a ~2"...
Forum: RV Building Tips/Techniques 11-12-2020, 05:32 PM
Replies: 14
Views: 2,610
Posted By hgerhardt
Just how heavy is "one of the heavier ones out...

Just how heavy is "one of the heavier ones out there"?
Forum: RV Ongoing Maintenance Issues 11-08-2020, 10:09 PM
Replies: 24
Views: 2,304
Posted By hgerhardt
I used to use a hacksaw to cut the paper from the...

I used to use a hacksaw to cut the paper from the end plates but lately I've been using a Stanley utility knife with the "heavy duty" blades, which are a bit longer than the light duty ones. You cut...
Forum: Glass Cockpit 11-08-2020, 09:53 PM
Replies: 66
Views: 8,767
Posted By hgerhardt
If you have a G3X, you only need the Nav data for...

If you have a G3X, you only need the Nav data for the GTN, which is $299/yr. The $149/yr for the G3X has all the databases that you would have redundantly had in a full-bundle GTN subscription. So...
Forum: RV-10 11-01-2020, 09:39 PM
Replies: 5
Views: 1,268
Posted By hgerhardt
Maybe... but as Greg Hughes from Van's replied to...

Maybe... but as Greg Hughes from Van's replied to a question recently:


Greg said:
Forum: RV-14 11-01-2020, 07:15 PM
Replies: 8
Views: 3,558
Posted By hgerhardt
Clear silicone adhesive IS a form of RTV... all...

Clear silicone adhesive IS a form of RTV... all RTV means is "room temperature vulcanizing" which all silicones which come from a tube are.
Forum: Painting your RV 11-01-2020, 12:29 PM
Replies: 7
Views: 1,833
Posted By hgerhardt
That's a really good idea! And much cheaper than...

That's a really good idea! And much cheaper than a refrigerated air drier: https://www.harborfreight.com/compressed-air-dryer-40211.html
Forum: Traditional Aircraft Engines 10-29-2020, 07:22 PM
Replies: 22
Views: 4,184
Posted By hgerhardt
While the SDS solution is really nice, I looked...

While the SDS solution is really nice, I looked at that as a bit over-engineered for what's needed here. Was looking at McMaster a while ago and found they have a gasket making service...
Forum: Safety 10-29-2020, 09:46 AM
Replies: 29
Views: 3,433
Posted By hgerhardt
When my seat adjuster folded up with my 'Almost...

When my seat adjuster folded up with my 'Almost -14', that also caused the retainer on the crossbar to get bent. Had to drill out the rivets and straighten that. In hindsight, should have made longer...
Forum: Safety 10-28-2020, 02:41 PM
Replies: 29
Views: 3,433
Posted By hgerhardt
Exactly the same thing happened to me. Ask the...

Exactly the same thing happened to me. Ask the customer if he has a "almost a 14" kit from AntiSplat installed. The seatback retainers on the "14" kit are too short.
Forum: RV General Discussion/News 10-25-2020, 09:09 PM
Replies: 19
Views: 4,792
Posted By hgerhardt
After the light rain this morning, it cleared up...

After the light rain this morning, it cleared up nicely late afternoon with downtown LA and Long Beach with Queen Mary in the sun.

3808
Forum: Traditional Aircraft Engines 10-24-2020, 03:09 PM
Replies: 23
Views: 3,999
Posted By hgerhardt
That really looks like rust to me. Look at the...

That really looks like rust to me. Look at the left side of the close-up. That stuff looks more brown than black there.

If this was "oil coal", I'd expect it to be uniformly around the cylinder,...
Forum: RV Building Tips/Techniques 10-24-2020, 08:44 AM
Replies: 15
Views: 2,940
Posted By hgerhardt
Good point. Looking at my length table, even that...

Good point. Looking at my length table, even that old 1980 VT would pass the length test at 190F, but not at 185F.

And the new 2020 VT grows .095" between 180F and 190F, indicating you need to be...
Forum: RV Building Tips/Techniques 10-23-2020, 12:30 PM
Replies: 38
Views: 5,622
Posted By hgerhardt
I work with aerodynamicists and propulsion...

I work with aerodynamicists and propulsion engineers. They all said I need to use vanes. None had had any rules-of-thumb, so went to my friend google and got the below. From that deduced that the...
Forum: RV Building Tips/Techniques 10-23-2020, 12:18 PM
Replies: 15
Views: 2,940
Posted By hgerhardt
I found no carbon, but I did find some lead...

I found no carbon, but I did find some lead residue, but not enough to cause anything to stick (just a thin film). I cleaned the internals before testing.
Forum: RV Building Tips/Techniques 10-23-2020, 11:53 AM
Replies: 15
Views: 2,940
Posted By hgerhardt
Dan et al, I think it's time to step back and...

Dan et al,
I think it's time to step back and analyze our long-held assumption, which is that if the valve moves .160" from 150F to 185F, it's OK. I think that's a bad assumption and here's...
Forum: RV Building Tips/Techniques 10-22-2020, 08:15 PM
Replies: 15
Views: 2,940
Posted By hgerhardt
I had truncated my chart because didn't think...

I had truncated my chart because didn't think anyone cared about the coolest temps... below is the whole chart starting at 80F. The oldest ones start almost identically in length even with the big...
Forum: RV Building Tips/Techniques 10-22-2020, 03:39 PM
Replies: 15
Views: 2,940
Posted By hgerhardt
Thanks, Dan! If anyone wants to borrow the seat...

Thanks, Dan!

If anyone wants to borrow the seat cutter, it's yours to use for shipping both ways.
Forum: RV Building Tips/Techniques 10-22-2020, 01:32 PM
Replies: 38
Views: 5,622
Posted By hgerhardt
Sorry, misunderstood your question. I bought the...

Sorry, misunderstood your question. I bought the SCEET specifically for that short piece. However, that joint has to compress and expand; that's why the room for the duct is 3" and I cut the SCAT to...
Forum: RV Building Tips/Techniques 10-22-2020, 01:27 PM
Replies: 38
Views: 5,622
Posted By hgerhardt
I'll give you the stl files and then you can...

I'll give you the stl files and then you can upload them at 3dHubs.com and have a set grown for yourself. Easy-peazy. Just give me an email to send the files to.

Or are you asking if someone will...
Forum: RV Building Tips/Techniques 10-22-2020, 09:00 AM
Replies: 38
Views: 5,622
Posted By hgerhardt
Yeah, so thought I too. Have you ever tried to...

Yeah, so thought I too. Have you ever tried to bend SCEET in a 90deg bend like that? I have a piece you can try with!
Forum: RV Building Tips/Techniques 10-22-2020, 08:40 AM
Replies: 38
Views: 5,622
Posted By hgerhardt
These 3 parts cost $400 at 3d Hubs...

These 3 parts cost $400 at 3d Hubs (https://www.3dhubs.com/).
$400 sounds like a lot of $$$ for some plastic parts. But the labor involved with making something like this from fiberglass (and...
Forum: RV Building Tips/Techniques 10-22-2020, 08:35 AM
Replies: 38
Views: 5,622
Posted By hgerhardt
Apparently looks can be deceiving. Here's a...

Apparently looks can be deceiving. Here's a cross-section and translucent image of the CAD model. As I said, the fins are fully radiused at the leading edge and tapered somewhat at the trailing...
Forum: RV Building Tips/Techniques 10-21-2020, 11:43 PM
Replies: 38
Views: 5,622
Posted By hgerhardt
Mine's exactly that. 3666

Mine's exactly that.

3666
Forum: RV Building Tips/Techniques 10-21-2020, 11:32 PM
Replies: 15
Views: 2,940
Posted By hgerhardt
Vernatherm Woes

Now that PlaneKool is working so well, Iíve been venturing into warmer locales where pre-A/C, I just didnít bother to fly. But now, oil temps are making regular excursions to 225*+ F. I set up a test...
Forum: RV Building Tips/Techniques 10-21-2020, 09:00 PM
Replies: 38
Views: 5,622
Posted By hgerhardt
My vanes are not cambered at all, but they are...

My vanes are not cambered at all, but they are aligned to free-stream. Cambering would have increased blockage but better aero would have probably overcome that; but I did area-distribute them such...
Forum: RV Building Tips/Techniques 10-21-2020, 08:24 PM
Replies: 38
Views: 5,622
Posted By hgerhardt
#3 CHT is running ~10F cooler than before, the...

#3 CHT is running ~10F cooler than before, the rest the same. I expected a little warmer on 3...
Forum: RV Building Tips/Techniques 10-21-2020, 12:06 PM
Replies: 38
Views: 5,622
Posted By hgerhardt
Your fellow Aero peers recommended the vanes. The...

Your fellow Aero peers recommended the vanes. The increased blockage is overcome by superior airflow. But if you want to do a science experiment by growing a pair of elbows with/without vanes, I'd...
Forum: RV Building Tips/Techniques 10-20-2020, 08:40 PM
Replies: 38
Views: 5,622
Posted By hgerhardt
Ducts Matter

Years ago, after the original baffle-mounted SW 8406R oil cooler (OC) cracked the baffle a couple of times, the 2nd time also cracking a flange of the OC, I Ďupgradedí to a remote-mounted SW 10599R...
Forum: RV-14 10-19-2020, 10:35 PM
Replies: 21
Views: 8,411
Posted By hgerhardt
Just remember "old police car"... 2000 Crown Vic...

Just remember "old police car"... 2000 Crown Vic starter solenoid.
Forum: RV-14 10-17-2020, 10:40 AM
Replies: 4
Views: 3,074
Posted By hgerhardt
Agree that's not a structural issue. But if you...

Agree that's not a structural issue. But if you want to avoid filler, you could have a paintless dent removal guy come out and massage it.
Forum: Electrical Systems 10-15-2020, 08:51 PM
Replies: 3
Views: 647
Posted By hgerhardt
Why don't you just make your own bracket? I made...

Why don't you just make your own bracket? I made one to support the '87 Honda Civic alternator I have. You can either make one with a band saw and file or Bridgeport mill or draw it in SolidWorks...
Forum: Glass Cockpit 10-14-2020, 07:04 AM
Replies: 7
Views: 1,090
Posted By hgerhardt
Yes! I've always done that too. Also in every...

Yes! I've always done that too. Also in every other motor vehicle I own.
Forum: Safety 10-12-2020, 06:44 PM
Replies: 38
Views: 6,298
Posted By hgerhardt
I read somewhere that with piston twins at least,...

I read somewhere that with piston twins at least, the purpose of the 2nd engine is to get the airplane to the scene of the crash.
Forum: Electrical Systems 10-11-2020, 01:08 PM
Replies: 7
Views: 994
Posted By hgerhardt
No, the S terminal is 'sense', as in run a wire...

No, the S terminal is 'sense', as in run a wire to near the battery to sense the actual charging voltage the battery sees. The regulator then increases voltage to counteract the voltage drop in the...
Forum: RV General Discussion/News 10-07-2020, 06:43 PM
Replies: 33
Views: 7,256
Posted By hgerhardt
Air compressor. And not one of those oil-less...

Air compressor. And not one of those oil-less direct-drive ones. It's not only that they're loud, but the quality of the noise makes them really annoying.

Better to find a belt-driven one, which you...
Forum: RV-14 10-06-2020, 02:07 PM
Replies: 14
Views: 3,462
Posted By hgerhardt
10 lbs of ice absorbs 1,440 Btu's by the time it...

10 lbs of ice absorbs 1,440 Btu's by the time it is completely melted. A compact car AC unit will do at least 14,400 Btu's per hour. So you'd need to have the capability to melt 100 lbs of ice per...
Forum: RV-10 10-03-2020, 10:14 AM
Replies: 13
Views: 2,412
Posted By hgerhardt
I am? Where do you see this alleged Polypenco...

I am? Where do you see this alleged Polypenco tubing? The hoses connected to the compressor are "reduced barrier" automotive A/C hose. I don't know why the 1/2" hose has the ribbed surface. That's...
Forum: RV-10 10-02-2020, 07:21 PM
Replies: 13
Views: 2,412
Posted By hgerhardt
David, thanks! I'll share more info in a huge...

David, thanks! I'll share more info in a huge post one of these days.

A few teasers in the meantime: the compressor is clutchless, variable-displacement and directly driven off the vacuum pump pad....
Forum: Fuel Injection Systems 10-02-2020, 10:53 AM
Replies: 29
Views: 7,540
Posted By hgerhardt
Here's most of the new RV-14...

Here's most of the new RV-14 snorkel:

https://mcusercontent.com/c57be1bb2d5168013c825b8d1/images/3e445cf9-66ec-4644-8264-c73c840ac4db.jpg
Forum: RV-10 10-02-2020, 09:37 AM
Replies: 13
Views: 2,412
Posted By hgerhardt
While I was doing this exact research several...

While I was doing this exact research several years ago, I found a retired engineer in TX who installed an Airflow system in his Glasair II and did a great job documenting the installation. He gave...
Forum: RV-10 10-01-2020, 11:48 PM
Replies: 13
Views: 2,412
Posted By hgerhardt
Tom, welcome and thanks for your analysis of...

Tom, welcome and thanks for your analysis of available systems. I have one of my own design installed in my -6, so I'm familiar with your point about properly charging these systems. Originally, I...
Forum: Traditional Aircraft Engines 09-30-2020, 10:49 PM
Replies: 10
Views: 1,620
Posted By hgerhardt
Looking at specifications for an IO390 from...

Looking at specifications for an IO390 from Lycoming and a Robinson R44 POH: both state the same upper limits of 115 psi during takeoff and 95 psi once warm which show your oil pressures are fine.
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