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Search: Posts Made By: hgerhardt
Forum: Traditional Aircraft Engines Today, 12:20 PM
Replies: 7
Views: 1,090
Posted By hgerhardt
Insects that got in through the breather? Mud...

Insects that got in through the breather? Mud daubers or ants? With only 20 hours with lots of time sitting, who knows what crawled in there.
Forum: RV-7/7A 05-17-2022, 03:54 PM
Replies: 14
Views: 1,014
Posted By hgerhardt
Air conditioning! And I'm hard at work making...

Air conditioning! And I'm hard at work making PlaneKool happen one of these days.
Forum: RV Ongoing Maintenance Issues 05-16-2022, 11:55 AM
Replies: 15
Views: 1,871
Posted By hgerhardt
You'd think for a company which has been building...

You'd think for a company which has been building the same basic engine for three quarters of a century, they'd have their processes down pat. But apparently not.
Forum: California 05-13-2022, 11:03 PM
Replies: 10
Views: 784
Posted By hgerhardt
The big EAA hangar at Compton has a ballistic...

The big EAA hangar at Compton has a ballistic wall up to 10' height. above that you can see daylight through the bullet holes in the wall. I remember the first time I landed there in 2003-ish as a...
Forum: Traditional Aircraft Engines 05-13-2022, 10:56 PM
Replies: 8
Views: 589
Posted By hgerhardt
Thanks! It's been 25 years since I built that and...

Thanks! It's been 25 years since I built that and at least 10 years since it's been off the engine, but it's around 10 lbs. It's not entirely carbon; it has 1/2" thick aluminum rails which bolt to...
Forum: Traditional Aircraft Engines 05-13-2022, 09:42 AM
Replies: 8
Views: 589
Posted By hgerhardt
I designed and built a carbon fiber intake for my...

I designed and built a carbon fiber intake for my Pontiac GTO in the 90's. It has a 440 cu in plenum with a 3" dia blowoff valve in the bottom. A few times that has come in handy with backfires which...
Forum: Electrical Systems 05-11-2022, 11:40 PM
Replies: 47
Views: 3,851
Posted By hgerhardt
Speaking of durability, one thing you ought to...

Speaking of durability, one thing you ought to consider is adding a locating boss to pick up the 1.5" dia hole in the vacuum pump drive like every other manufacturer does that makes accessories to...
Forum: Traditional Aircraft Engines 04-26-2022, 01:20 PM
Replies: 8
Views: 578
Posted By hgerhardt
When my solenoid got stuck in Death Valley, I was...

When my solenoid got stuck in Death Valley, I was able to use a cowl hinge pin to pry the pinion gear out of the starter into the ring gear, which worked well. Banging on the solenoid did nothing.

I...
Forum: Places To Fly...Things to See...Things to Eat 04-21-2022, 07:56 PM
Replies: 3
Views: 366
Posted By hgerhardt
We flew into MMV about 10 years ago on the way...

We flew into MMV about 10 years ago on the way back from a GTO show in Portland and that museum is definitely worth doing. Funny thing is, I lived 10 miles from where the Spruce Goose was located in...
Forum: RV-14 04-20-2022, 09:06 AM
Replies: 37
Views: 3,187
Posted By hgerhardt
Judging by the dozens of posts on VAF about...

Judging by the dozens of posts on VAF about defective/sticky Skytec solenoids, it looks like that's by far the biggest failure mode of the LS starters.

Here's the Sticky on Skytec solenoids:...
Forum: RV-14 04-12-2022, 11:28 AM
Replies: 37
Views: 3,187
Posted By hgerhardt
Interesting to see what they come up with. The...

Interesting to see what they come up with. The current LS solenoid is an OTS aftermarket unit for Ford PMGR starters, which is what the LS is based on. The solenoid is aftermarket because Ford no...
Forum: Electrical Systems 04-10-2022, 11:41 AM
Replies: 2
Views: 386
Posted By hgerhardt
Assuming it's a Denso-based design with internal...

Assuming it's a Denso-based design with internal regulator and having a round socket, these ought to...
Forum: RV General Discussion/News 04-06-2022, 01:12 PM
Replies: 64
Views: 10,236
Posted By hgerhardt
Yep. I saw my first Van’s booth a year after...

Yep. I saw my first Van’s booth a year after first flight.
Forum: Safety 03-27-2022, 01:53 PM
Replies: 9
Views: 947
Posted By hgerhardt
Actually the compressor most likely wasn't a...

Actually the compressor most likely wasn't a hazard. Compressors have a safety blow-off valve which would vent excess pressure before the tank got to a critical pressure level. And the tank is filled...
Forum: RV-6/6A 03-21-2022, 10:25 AM
Replies: 8
Views: 1,216
Posted By hgerhardt
You could also refer to Van's drawings, which you...

You could also refer to Van's drawings, which you should have a set of anyway. If not, Van's is now nice enough to provide a pdf copy for free if you sign up for an account there with your 6's serial...
Forum: Traditional Aircraft Engines 03-20-2022, 01:44 PM
Replies: 22
Views: 1,590
Posted By hgerhardt
I now have ~940 hours on those hoses and clamps,...

I now have ~940 hours on those hoses and clamps, and still dry. I installed these hoses in 2003, first flight was 2007, and they're still soft and leak-free.

If you go to my original post above,...
Forum: Fuel Injection Systems 03-10-2022, 10:59 AM
Replies: 8
Views: 766
Posted By hgerhardt
One nice thing about the AFP unit is, the pump...

One nice thing about the AFP unit is, the pump itself is an Airtex E2315, available at auto parts stores for around $100.
Forum: Electrical Systems 03-10-2022, 10:55 AM
Replies: 20
Views: 1,630
Posted By hgerhardt
True that, just have to be careful to keep that...

True that, just have to be careful to keep that fusible link away from anything combustible, like a fiberglass inlet duct. My old Silverado is actually wired this way.

Another drawback I see with a...
Forum: Electrical Systems 03-09-2022, 08:58 PM
Replies: 20
Views: 1,630
Posted By hgerhardt
I had thought about saying exactly that but...

I had thought about saying exactly that but figured the peanut gallery would shoot it down, as they have in the past. I wired my -6 like that. The only drawback of doing it this way is you have a hot...
Forum: Tools 03-07-2022, 02:35 PM
Replies: 22
Views: 2,167
Posted By hgerhardt
I originally used a consumer-grade label maker...

I originally used a consumer-grade label maker when I built my -6 but after a few years a bunch peeled off. When I redid my panel in '13, I used an Ultra Fine Sharpie on white heat shrink tubing....
Forum: Traditional Aircraft Engines 03-03-2022, 09:59 AM
Replies: 6
Views: 502
Posted By hgerhardt
If it came with the engine, it's probably a...

If it came with the engine, it's probably a Sky-Tec LS. Why not just keep it for now and see how it works with your new EarthX battery?

The common failure point of these is the solenoid, which is...
Forum: RV General Discussion/News 02-22-2022, 12:26 PM
Replies: 84
Views: 15,480
Posted By hgerhardt
They do indeed suck, but some airports in the LA...

They do indeed suck, but some airports in the LA area have 100LL at significantly less than premium mogas! Last week, I paid 4.82USD/gal for 100LL and 5.09USD/gal for 91 octane for my car!
Forum: RV-7/7A 02-17-2022, 02:15 PM
Replies: 50
Views: 7,003
Posted By hgerhardt
So much easier to have a bellmouth grown from...

So much easier to have a bellmouth grown from HP-MJF using nylon-12. Send me your email via PM and I'll send you STL's for these parts. I've had this setup installed in my -6 for 1.5 years or so and...
Forum: Traditional Aircraft Engines 02-17-2022, 11:37 AM
Replies: 10
Views: 1,296
Posted By hgerhardt
Looks like steel shot to me too. Hopefully that...

Looks like steel shot to me too. Hopefully that was the only one.

Before you reassemble, take a razor blade and shave off the paint remnants where the copper sealing ring contacts the crankcase. The...
Forum: Traditional Aircraft Engines 02-11-2022, 05:34 PM
Replies: 12
Views: 1,055
Posted By hgerhardt
You may already know this, but Lycoming has a...

You may already know this, but Lycoming has a service bulletin describing the black steel adapter plate and how to bond the rubber seal to it, as well as proper part numbers for the plate, adhesive,...
Forum: Traditional Aircraft Engines 02-11-2022, 05:28 PM
Replies: 39
Views: 13,073
Posted By hgerhardt
We’re up to 930 hours with the same hoses and...

We’re up to 930 hours with the same hoses and clamps. They were first installed in 2008. And they’re still dry.
Forum: Alternative Engines 02-09-2022, 12:54 PM
Replies: 74
Views: 8,159
Posted By hgerhardt
Lycoming does still build that iE2 engine, don't...

Lycoming does still build that iE2 engine, don't they? But I suppose you mean "dropping the plan" as not applying that tech to any of their other engines, like...
Forum: Traditional Aircraft Engines 02-07-2022, 09:53 AM
Replies: 6
Views: 597
Posted By hgerhardt
Depends on whether you have a 149-tooth ring gear...

Depends on whether you have a 149-tooth ring gear or a 122-tooth. See this article to identify yours (so you don't have to count teeth!): https://skytec.aero/aircraft-starter-installation-issues/

As...
Forum: RV Building Tips/Techniques 02-06-2022, 12:47 PM
Replies: 27
Views: 3,433
Posted By hgerhardt
x4 for a zip tie gun! As much as we spend on...

x4 for a zip tie gun! As much as we spend on these airplanes, a good zip tie gun is a tiny investment. And I mean get a good one, like a Panduit.

I'm also convinced that installing zip ties too...
Forum: Traditional Aircraft Engines 02-02-2022, 08:33 AM
Replies: 12
Views: 1,055
Posted By hgerhardt
Can you post some pics of the back side of this...

Can you post some pics of the back side of this engine? Would be interesting to see the differences between your 6D variant and the other typical single-drive dual-mag engines. Below is my...
Forum: Traditional Aircraft Engines 02-01-2022, 09:56 PM
Replies: 12
Views: 1,055
Posted By hgerhardt
May I ask what's motivating your desire for a...

May I ask what's motivating your desire for a 90-deg adapter? I have a Dual-Mag IO-360 in my -6 and the filter access/clearance is quite good-- and allows use of the longer filter (CH48104). Even...
Forum: RV Building Tips/Techniques 01-27-2022, 04:03 PM
Replies: 4
Views: 750
Posted By hgerhardt
10 years ago I used a nibbler which sprayed tiny...

10 years ago I used a nibbler which sprayed tiny chunks of metal everywhere.

Today I'd use an OMT -- oscillating multi tool with a curved-tooth bimetal blade. And definitely drill holes in the...
Forum: California 01-25-2022, 06:30 PM
Replies: 3
Views: 460
Posted By hgerhardt
D and G Aero Greg Bloomstadt 3409 Airport Dr. #D...

D and G Aero

Greg Bloomstadt
3409 Airport Dr. #D
Torrance, CA 90505
Phone: (310) 463-8506
Aircraft avionics, electrical installation, and troubleshooting. Licensed FCC and A+P.

He's also a Garmin...
Forum: RV General Discussion/News 01-18-2022, 03:30 PM
Replies: 2
Views: 599
Posted By hgerhardt
2" hose is needed.

2" hose is needed.
Forum: Propellers 01-17-2022, 05:20 PM
Replies: 6
Views: 1,365
Posted By hgerhardt
Paul, was looking at your Kitplanes July '21 prop...

Paul, was looking at your Kitplanes July '21 prop article and also the referenced January '21 story. Each article compared your BA Hartzell with the WW300 3-blade, but there's a pretty big...
Forum: Alternative Engines 12-31-2021, 10:36 AM
Replies: 803
Views: 237,674
Posted By hgerhardt
IIRC less than 1" H2O, but not the same amount of...

IIRC less than 1" H2O, but not the same amount of drift between the two, which of course contaminates the deltaP measurement as well as the two static pressures.

But, 15 minutes is plenty of time...
Forum: Alternative Engines 12-30-2021, 10:09 PM
Replies: 803
Views: 237,674
Posted By hgerhardt
As I wrote last year in this thread...

As I wrote last year in this thread (https://vansairforce.net/community/showthread.php?t=188113), I had good success with Bluetooth manometers...
Forum: RV Building Tips/Techniques 12-01-2021, 09:26 PM
Replies: 4
Views: 938
Posted By hgerhardt
Definitely remove the canopy and the rear pin...

Definitely remove the canopy and the rear pin receiver blocks and the slider tracks. Also, measure the width of the fuselage near the existing seatback cross brace before you cut it out. Make a...
Forum: RV General Discussion/News 11-21-2021, 06:46 PM
Replies: 27
Views: 4,895
Posted By hgerhardt
The NACA scoop is cut into the cowl exit and has...

The NACA scoop is cut into the cowl exit and has a 6" x 2" outlet. The condenser housing tapers outward to the width of the condenser, which is 12" wide and 20" long. I also added turning vanes to...
Forum: RV General Discussion/News 11-21-2021, 11:03 AM
Replies: 27
Views: 4,895
Posted By hgerhardt
To add to Radioflyer's comment: the compressor is...

To add to Radioflyer's comment: the compressor is an axial 5-cylinder with a variable swashplate, controlled by a PWM signal. PWM width determines swashplate angle, which determines the actual...
Forum: RV General Discussion/News 11-20-2021, 12:45 PM
Replies: 27
Views: 4,895
Posted By hgerhardt
Just leave 4 gallons of gas at home and you'll be...

Just leave 4 gallons of gas at home and you'll be back to original weight.


Sorry, CG only moves 0.15" forward.


Ain't nothing happened... yet. Maybe kits someday if I can get the needed...
Forum: RV General Discussion/News 11-20-2021, 11:49 AM
Replies: 27
Views: 4,895
Posted By hgerhardt
I'm glad you enjoyed your experience! And the...

I'm glad you enjoyed your experience! And the pleasure was all mine to introduce you to my RV-6 and I hope you find a decent one to buy someday. And it looks like the cat's out of the bag now too...
Forum: RV General Discussion/News 11-14-2021, 09:56 PM
Replies: 13
Views: 3,144
Posted By hgerhardt
Flew in the 90F heat that is SoCal with 42F A/C...

Flew in the 90F heat that is SoCal with 42F A/C blowing in my face. It was lovely!
Forum: Electrical Systems 11-14-2021, 11:15 AM
Replies: 8
Views: 1,805
Posted By hgerhardt
Which engine and prop and ignition system do you...

Which engine and prop and ignition system do you have?
And how long (hours & years) have you had a vacuum pump flange-mounted alternator?
Forum: RV General Discussion/News 11-12-2021, 12:08 PM
Replies: 39
Views: 4,795
Posted By hgerhardt
I have exactly the same experience with...

I have exactly the same experience with stainless-on-stainless galling. Both with screws and threaded fluid fittings. At work, had a project assembling stainless AN fittings for an oxygen system. Of...
Forum: RV-12/RV-12iS 11-11-2021, 09:18 AM
Replies: 6
Views: 1,177
Posted By hgerhardt
There is a much better way: use Google. In the...

There is a much better way: use Google. In the search bar, put "site:vansairforce.net" without the quotes and then your search term. I did this one just now; as you can see, VAF could not find my...
Forum: RV General Discussion/News 11-09-2021, 10:26 AM
Replies: 9
Views: 1,530
Posted By hgerhardt
The 2nd pic shows evidence it got hot in the...

The 2nd pic shows evidence it got hot in the center, which could have been caused by high resistance from the assembly loosening before it fell apart, so I'd vote for B-lead output on the (previous?)...
Forum: Electrical Systems 11-05-2021, 10:59 PM
Replies: 10
Views: 1,471
Posted By hgerhardt
On the (defective) firewall start solenoid check...

On the (defective) firewall start solenoid check continuity from the I terminal to the battery stud. If there is continuity, it's defective, and that would send power to the starter-mounted solenoid...
Forum: California 11-01-2021, 10:17 PM
Replies: 2
Views: 589
Posted By hgerhardt
If you'll settle for a non-A -6, we can go for a...

If you'll settle for a non-A -6, we can go for a ride out of TOA. PM me your phone number if interested.
Forum: Reviews 10-29-2021, 02:19 PM
Replies: 3
Views: 1,038
Posted By hgerhardt
I've had good experiences with both of those...

I've had good experiences with both of those vendors too.

Just FYI: the pump itself is an Airtex E2315, available at most auto parts stores for around $100.
Forum: Traditional Aircraft Engines 10-26-2021, 08:48 AM
Replies: 19
Views: 4,792
Posted By hgerhardt
For those with cracked solder joints, it would be...

For those with cracked solder joints, it would be a good idea to flow a piece of shielding braid from a multi-conductor cable into the solder pool to help reinforce it. This is the same idea as...
Forum: RV Ongoing Maintenance Issues 10-15-2021, 11:29 AM
Replies: 8
Views: 1,784
Posted By hgerhardt
Looks like plain old aluminum extrusion. You can...

Looks like plain old aluminum extrusion. You can get a piece from McMaster and make a new one, using your old one as a pattern. (verify that a 3" leg length is adequate; get longer/shorter if...
Forum: RV General Discussion/News 10-05-2021, 12:00 AM
Replies: 10
Views: 1,837
Posted By hgerhardt
For the "winglets" in particular, are there any...

For the "winglets" in particular, are there any benefits besides cosmetic and good lighting?

https://www.aveoengineering.com/wp-content/uploads/2020/08/AveoZipTipsPremiere-01-1024x567.jpg
Forum: RV-10 10-02-2021, 05:56 AM
Replies: 11
Views: 1,656
Posted By hgerhardt
watch those spacers

Re: those backup alt spacers: Need to be careful that the overhang moment isn't exceeded of the vacuum pump pad. The Lycoming TCDS only allows a max of 25 in-lb and if a 1" spacer is used with that...
Forum: RV Ongoing Maintenance Issues 09-27-2021, 03:36 PM
Replies: 0
Views: 504
Posted By hgerhardt
Michelin Pilot balance weight pirep

First time using the newer Michelin Pilot tires (5.00-5) on my -6. They are heavier than the typical McCreary's (or whatever they're called now) but they land just fine and definitely do last longer,...
Forum: Traditional Aircraft Engines 09-23-2021, 11:56 AM
Replies: 6
Views: 1,235
Posted By hgerhardt
You could use our own Vern's Arduino-based...

You could use our own Vern's Arduino-based controller (https://vansairforce.net/community/showthread.php?t=151119) to operate the servo, and provide status to your EFIS (temp and/or shutter position).
Forum: RV Photo/Video URLs 09-23-2021, 11:48 AM
Replies: 18
Views: 4,442
Posted By hgerhardt
That was an awesome race! The video doesn't...

That was an awesome race! The video doesn't really convey just how close the finish was: 2nd place was only 0.228 seconds behind... and 3rd was 0.569 seconds behind 2nd. So less than 0.8 seconds...
Forum: RV-10 09-14-2021, 10:32 PM
Replies: 59
Views: 14,315
Posted By hgerhardt
Yeah, you need about 1.5 tons of refrigeration...

Yeah, you need about 1.5 tons of refrigeration capacity, which is 18,000 BTU’s. This is what a typical compact car can do.

I have this much capacity in my -6 and on very hot days it needs every bit...
Forum: RV-7/7A 09-09-2021, 08:41 PM
Replies: 15
Views: 3,041
Posted By hgerhardt
Remember the 2nd prototype RV-10 had a Conti...

Remember the 2nd prototype RV-10 had a Conti IO-360, so you might be able to get an engine mount for that from Van's. Not sure if the mods needed to fit that mount into a -7 would be worth it, but it...
Forum: RV General Discussion/News 09-05-2021, 11:29 PM
Replies: 18
Views: 2,663
Posted By hgerhardt
I have a -6. I get gear shimmy from 30-35 psi but...

I have a -6. I get gear shimmy from 30-35 psi but not at 40, so that's what I use. Best if you experiment to see what YOUR airplane likes.
Forum: RV Building Tips/Techniques 09-02-2021, 09:34 AM
Replies: 15
Views: 1,935
Posted By hgerhardt
+1 for Coleman fuel. It's mostly naphtha with...

+1 for Coleman fuel. It's mostly naphtha with stabilizer and some smell-good stuff.

Nice thing about Coleman fuel is it doesn't evaporate as quickly as acetone, so it sits longer on the surface to...
Forum: RV-4 08-18-2021, 02:36 PM
Replies: 19
Views: 4,165
Posted By hgerhardt
Here's a drawing of the axle spacer needed to...

Here's a drawing of the axle spacer needed to adapt either of Matco's 6" or 7" wheels to a stock Van's fork. Make from 3/4" dia. 6061-T6 aluminum round stock. You'll have to disassemble the tailwheel...
Forum: RV-4 08-18-2021, 02:29 PM
Replies: 19
Views: 4,165
Posted By hgerhardt
I'm not Northernliving, but I think you...

I'm not Northernliving, but I think you misinterpreted Matco's email. George said he no longer had the 7" tires to fit on the WHLTW37 wheel. He did say his 8" (200x50) tire fits the same wheel. So, I...
Forum: RV-4 08-17-2021, 04:08 PM
Replies: 19
Views: 4,165
Posted By hgerhardt
Interesting info! That gives another option for...

Interesting info! That gives another option for that WHLTW37 wheel. It also means that the Flyboy Condor 2 wheel mentioned above will also take the 7" x 1-3/4" tire. Unfortunately the 8" tire does...
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