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Search: Posts Made By: rv7charlie
Forum: Electrical Systems Yesterday, 09:40 PM
Replies: 4
Views: 132
Posted By rv7charlie
What Larry said. If you look at the specs for...

What Larry said. If you look at the specs for those lights, they are 12V devices, meaning that each light has its own current limiting device built in. Treat them like regular old 12V lights, and...
Forum: RV General Discussion/News Yesterday, 11:16 AM
Replies: 13
Views: 784
Posted By rv7charlie
I could have given you empirical validation...

I could have given you empirical validation without the math. A former airpark neighbor had a duck put a 8" deep dent in the leading edge of his Debonair wing, inside the prop arc. No blood or damage...
Forum: VAF Classifieds (posts in here deleted after 30 days) 10-21-2018, 06:38 PM
Replies: 20
Views: 880
Posted By rv7charlie
Agreed on the good idea of redundant 'fat wire'...

Agreed on the good idea of redundant 'fat wire' grounds to the engine.

But what's the physics that makes the *braid* of a bunch of strands touching each other, improve electrical performance over...
Forum: VAF Classifieds (posts in here deleted after 30 days) 10-21-2018, 04:33 PM
Replies: 20
Views: 880
Posted By rv7charlie
I've always assumed that it was for flexibility...

I've always assumed that it was for flexibility and fatigue resistance; same principle as using stranded wire instead of solid in a/c, where there's always vibration trying to flex it. If there were...
Forum: VAF Classifieds (posts in here deleted after 30 days) 10-21-2018, 04:28 PM
Replies: 20
Views: 880
Posted By rv7charlie
Are you sure that grounding a tower that feeds RF...

Are you sure that grounding a tower that feeds RF frequencies into the air translates to DC? Skin conduction is a real thing at higher AC frequencies. But if it was true for DC, don't you think we'd...
Forum: VAF Classifieds (posts in here deleted after 30 days) 10-21-2018, 02:15 PM
Replies: 20
Views: 880
Posted By rv7charlie
Or your local welding supply house. Welding cable...

Or your local welding supply house. Welding cable is almost as flexible as ground strap, and they can crimp on whatever ends to whatever length you need. I consider it a bonus that the insulation...
Forum: Traditional Aircraft Engines 10-21-2018, 06:53 AM
Replies: 5
Views: 664
Posted By rv7charlie
I saw a magazine article recently about a guy...

I saw a magazine article recently about a guy doing that with a small Continental, but no idea about a Lyc. I guess it should work, if you can get the mass flow high enough.
Forum: RV General Discussion/News 10-20-2018, 09:57 PM
Replies: 41
Views: 3,636
Posted By rv7charlie
Mine are so light because I wet 3 bays of each...

Mine are so light because I wet 3 bays of each outboard leading edge. Only added weight are the fittings, fuel line, and some scrap aluminum to cover the lightening holes in the nose ribs. Would be a...
Forum: RV General Discussion/News 10-20-2018, 08:44 PM
Replies: 0
Views: 186
Posted By rv7charlie
Annual Slobovia Outernational Pumpkin Drop invitation

Hi all,

It's time to get those hard points functioning, and procure ordinance. Slobovia Outernational's annual Pumpkin Drop is coming up on Nov 3. Cajun food at noon; competition begins at 1:30. If...
Forum: RV General Discussion/News 10-20-2018, 07:45 PM
Replies: 41
Views: 3,636
Posted By rv7charlie
What's the mission? If you're just doing solo...

What's the mission? If you're just doing solo distance record stuff, sure. But if you're doing it to tanker fuel and/or for travel with a friend, then as you said, you lose both baggage volume and...
Forum: Alternative Engines 10-19-2018, 11:48 AM
Replies: 4
Views: 819
Posted By rv7charlie
This...

This one?
http://www.dieselhub.com/halfton/ford-lions-diesel.html

How does a 60 degree V-8 balance? I know that 90 degree V-6's (chopped V-8's, like the old GM V-6 based on the SBC engine) have...
Forum: RV General Discussion/News 10-19-2018, 09:31 AM
Replies: 29
Views: 1,978
Posted By rv7charlie
I took that a step further in my -7 build. The...

I took that a step further in my -7 build. The switches are on a pair of subpanels (strips on either side of the throttle array) that screw to the bottom of the main instrument panel. All wires go to...
Forum: RV General Discussion/News 10-19-2018, 06:29 AM
Replies: 29
Views: 1,978
Posted By rv7charlie
And while this is personal preference, the ring...

And while this is personal preference, the ring terminal thing is a major negative for me. I've been tinkering behind instrument panels since my 1st homebuilt almost 30 years ago, and messing with an...
Forum: RV General Discussion/News 10-18-2018, 09:26 PM
Replies: 29
Views: 1,978
Posted By rv7charlie
I'll take a swing at it. FWIW, my opinion is that...

I'll take a swing at it. FWIW, my opinion is that it's the question of whether 'better is the enemy of good enough'. Many thousands of Carling switches are flying successfully in homebuilts. I'm...
Forum: Southeast 10-18-2018, 08:07 PM
Replies: 3
Views: 248
Posted By rv7charlie
Airnav says 'Private use. Permission required...

Airnav says 'Private use. Permission required prior to landing'. Of course, it also says that pattern altitude is 4200' AGL...

https://www.airnav.com/airport/NC14

Charlie
Forum: Alternative Engines 10-18-2018, 05:47 PM
Replies: 4
Views: 819
Posted By rv7charlie
I'd bet you can buy the core engine now. Read the...

I'd bet you can buy the core engine now. Read the notes in your last pic.
Forum: RV General Discussion/News 10-17-2018, 11:46 AM
Replies: 4
Views: 929
Posted By rv7charlie
How are you going to use it? (strictly...

How are you going to use it? (strictly recreational, or commercial) If recreational, and open for public use, what are your state's recreational use laws like?

A resource:
https://theraf.org/
Forum: RV General Discussion/News 10-16-2018, 11:50 AM
Replies: 41
Views: 3,636
Posted By rv7charlie
Don't recall that particular thread, but there...

Don't recall that particular thread, but there are multiple issues; not just wing bending moment/gross weight. Yes, spreading the load out along the wing can reduce the bending moment at the root,...
Forum: RV-4 10-16-2018, 08:51 AM
Replies: 12
Views: 793
Posted By rv7charlie
You can recline the seat back a fair amount by...

You can recline the seat back a fair amount by moving the rails to behind the rollbar crossmember. I notched the angles to snug them against the back of the crossmember, and used a pair of adel clamp...
Forum: RV General Discussion/News 10-15-2018, 08:53 AM
Replies: 3
Views: 459
Posted By rv7charlie
In-ear ANR (noise cancelling) headphones are...

In-ear ANR (noise cancelling) headphones are getting to be more common in the consumer arena. Try googling that. Only caution I'd have is whether consumer devices can handle the really high sound...
Forum: RV-7/7A 10-14-2018, 02:53 PM
Replies: 9
Views: 318
Posted By rv7charlie
The DDRT2 is no guarantee of a proper dimple....

The DDRT2 is no guarantee of a proper dimple. Have you done the 'straightedge' test on the skin after dimpling? If it's underdimpled, the skin won't be flat around the dimple after dimpling. Fully...
Forum: RV-7/7A 10-14-2018, 11:56 AM
Replies: 9
Views: 318
Posted By rv7charlie
Try re- dimpling in the 'skin' piece, using a lot...

Try re- dimpling in the 'skin' piece, using a lot heavier hand on the mallet. If you don't have nice crisp 'corners' on the dimple, the underside will have a rounded corner at the top of the dimple...
Forum: RV General Discussion/News 10-14-2018, 10:00 AM
Replies: 41
Views: 3,636
Posted By rv7charlie
The tip is quite floppy until it's screwed to the...

The tip is quite floppy until it's screwed to the wing, and as strange as it sounds, it can be 'rotated' around the end rib quite a bit while fitting it (see the many threads on lining up the tip...
Forum: RV-4 10-14-2018, 09:14 AM
Replies: 8
Views: 516
Posted By rv7charlie
You need to ask the mfgrs about suitability of...

You need to ask the mfgrs about suitability of each prop for your engine/airframe. No two mfgrs rate their pitch measurements the same.

Having said that... Given equal blade count, a...
Forum: RV General Discussion/News 10-13-2018, 10:08 PM
Replies: 41
Views: 3,636
Posted By rv7charlie
I wouldn't pay that much. On the other hand, I...

I wouldn't pay that much. On the other hand, I did pay almost 20 grand for a few thousand dollars worth of parts when I bought my -7 kit. What's your time worth, and do you have the skills/tools to...
Forum: RV General Discussion/News 10-13-2018, 10:03 PM
Replies: 41
Views: 3,636
Posted By rv7charlie
It's not always about long legs. For me, it's the...

It's not always about long legs. For me, it's the ability to tanker cheap fuel for round trip range.
Forum: RV General Discussion/News 10-13-2018, 04:20 PM
Replies: 29
Views: 1,978
Posted By rv7charlie
The DPDT (larger than their SPST & SPDT) switches...

The DPDT (larger than their SPST & SPDT) switches sold by B&C are ~1.33" tall.
Forum: RV General Discussion/News 10-12-2018, 08:00 PM
Replies: 3
Views: 291
Posted By rv7charlie
I thought I had a copy of it, but no joy. Mod is...

I thought I had a copy of it, but no joy. Mod is very simple, though. The attach brackets are more or less parabolic curve mirror images of each other, with the tips overlapped. There's a hole...
Forum: Electrical Systems 10-12-2018, 06:33 PM
Replies: 7
Views: 413
Posted By rv7charlie
Everything's a compromise. Connectors make it...

Everything's a compromise. Connectors make it easy to change out the link. But what are the odds of needing to change one? The only way a properly sized link will 'blow' is a catastrophic fault to...
Forum: RV-10 10-12-2018, 12:55 PM
Replies: 13
Views: 737
Posted By rv7charlie
If it were me, I'd do the same trick, but with an...

If it were me, I'd do the same trick, but with an aluminum 'shim'. Cut to fit, drill slightly oversize hole, slide into place, screw in the tiedown, and proseal or RTV around the edges to the skin...
Forum: RV General Discussion/News 10-11-2018, 10:20 PM
Replies: 7
Views: 392
Posted By rv7charlie
IIRC, I had to fax my request, with proposed test...

IIRC, I had to fax my request, with proposed test area. Response was quick,; maybe a day or two at most.
Forum: RV General Discussion/News 10-11-2018, 08:34 AM
Replies: 41
Views: 3,636
Posted By rv7charlie
My point was, that if it's an acro-capable a/c, I...

My point was, that if it's an acro-capable a/c, I want to keep it as close to 'stock' configuration as I can for acro. By keeping the aux fuel in separate tanks, with minimum achievable weight gain...
Forum: RV General Discussion/News 10-11-2018, 07:23 AM
Replies: 41
Views: 3,636
Posted By rv7charlie
Romanov, Couple of thoughts. Some have mentioned...

Romanov,

Couple of thoughts. Some have mentioned just building bigger tanks. I like that idea, if the plane is not aerobatic (or you don't intend to do acro), but... If you plan on acro, there'd be...
Forum: RV General Discussion/News 10-08-2018, 08:53 PM
Replies: 8
Views: 952
Posted By rv7charlie
Might be worth checking the rated tension load of...

Might be worth checking the rated tension load of anything that clicks in place. A decent storm can blow hard enough to make the plane 'fly', and if the tiedown lines are loose the impulse load can...
Forum: RV Ongoing Maintenance Issues 10-08-2018, 08:46 PM
Replies: 7
Views: 520
Posted By rv7charlie
I had to cut one access hole in one of my -4's...

I had to cut one access hole in one of my -4's tanks. I cut a fairly large rectangle in the back; I think I left about 1" around the outside of the bay. Made it a lot easier to get my hand in there...
Forum: RV General Discussion/News 10-08-2018, 08:35 PM
Replies: 13
Views: 859
Posted By rv7charlie
I doubt the previous owner did anything 'wrong'. ...

I doubt the previous owner did anything 'wrong'. The symptom has been discussed before; I've had it in my 1991 RV-4's tanks. I initially thought it was my use of E-free mogas that was causing it,...
Forum: RV-4 10-08-2018, 05:19 PM
Replies: 2
Views: 350
Posted By rv7charlie
I'd recommend calling the factory before...

I'd recommend calling the factory before proceeding. I don't think you want toe in; certainly not with any weight on the wheels.

Having said that, I'd want the pants to be aligned with airflow in...
Forum: RV General Discussion/News 10-08-2018, 07:27 AM
Replies: 14
Views: 1,171
Posted By rv7charlie
I tried to avoid putting flight-critical switches...

I tried to avoid putting flight-critical switches too near the throttle/mixture. Probably overthinking it, but didn't want to risk tripping one when reaching for a control. No doubt guarded switches,...
Forum: RV General Discussion/News 10-07-2018, 06:46 AM
Replies: 12
Views: 794
Posted By rv7charlie
Something to consider: After you get the flaps...

Something to consider: After you get the flaps off, take a look at the underside of the top wing skin above the tape location. If you see any scratching, that's what you'll eventually see on the flap...
Forum: Electrical Systems 10-06-2018, 11:14 AM
Replies: 13
Views: 790
Posted By rv7charlie
Or, see post #4 edit: Should have been more...

Or, see post #4

edit: Should have been more specific; paralleling contacts will not cause them to share the load equally, unless you include 'ballast' leads on both sides of each contact. Running...
Forum: Electrical Systems 10-05-2018, 03:43 PM
Replies: 13
Views: 790
Posted By rv7charlie
Nope. In this case, the amp rating would likely...

Nope. In this case, the amp rating would likely stay the same for the switch, but it would likely handle a couple more amps when the voltage drops from 28 to 14. The *power* the switch is handling...
Forum: Electrical Systems 10-05-2018, 01:53 PM
Replies: 13
Views: 790
Posted By rv7charlie
Good advice to exercise care in selection, but no...

Good advice to exercise care in selection, but no reason to reject all possibilities out of hand. It's fairly easy to find the DC ratings, and, at least with my TruTrak servos, it's simple to power...
Forum: RV General Discussion/News 10-05-2018, 07:37 AM
Replies: 4
Views: 563
Posted By rv7charlie
FWIW, my neighbor (multi-builder of tube/fabric +...

FWIW, my neighbor (multi-builder of tube/fabric + RV, CFI, A&P/IA, etc) installed one in a Tailwind for instrument flying.
Forum: RV General Discussion/News 10-03-2018, 02:18 PM
Replies: 43
Views: 6,893
Posted By rv7charlie
uh huh. And what's the standard of living for the...

uh huh. And what's the standard of living for the average person in Saudi Arabia, and the other Gulf states?
Forum: RV General Discussion/News 10-03-2018, 08:11 AM
Replies: 43
Views: 6,893
Posted By rv7charlie
If you follow the news about the effects, *many*...

If you follow the news about the effects, *many* more domestic jobs are lost due to tariffs than are gained. I'm afraid to quote actual numbers from memory, but the ratio was something in excess of...
Forum: Electrical Systems 10-02-2018, 06:44 AM
Replies: 26
Views: 986
Posted By rv7charlie
I do understand the desire to build it yourself,...

I do understand the desire to build it yourself, and potentially the need for custom fitting. But have you looked around at the dozens (hundreds?) of options that are pre-packaged and ready to...
Forum: RV General Discussion/News 09-30-2018, 01:48 PM
Replies: 10
Views: 593
Posted By rv7charlie
I've seen a technique to change the rotation of...

I've seen a technique to change the rotation of the leg in its socket. It involves making a fixture, attached to the leg below the socket that will align the drill bit with the hole in the leg....
Forum: RV-6/6A 09-29-2018, 09:11 AM
Replies: 21
Views: 2,373
Posted By rv7charlie
Hi Ron, To modify an old joke about high dollar...

Hi Ron,

To modify an old joke about high dollar purchases, "If you gotta ask, don't."

Seriously, don't try to teach yourself acro in an RV. At minimum, get someone who has experience to fly with...
Forum: RV-10 09-28-2018, 06:52 AM
Replies: 31
Views: 1,729
Posted By rv7charlie
Here's a quick link to some insulation...

Here's a quick link to some insulation properties:
https://www.performancewire.com/insulated-wire-protection/

All the current (pardon the pun) welding cable I've been able to find has EPDM...
Forum: RV-10 09-27-2018, 09:49 PM
Replies: 31
Views: 1,729
Posted By rv7charlie
Aaand... what does pvc have in common with...

Aaand... what does pvc have in common with welding cable?
Forum: Alternative Engines 09-27-2018, 02:30 PM
Replies: 19
Views: 2,772
Posted By rv7charlie
I have several hours of passenger time in Tracy...

I have several hours of passenger time in Tracy Crook's Mazda Renesis powered RV-4, and a bit under an hour in a Mazda 13B powered RV-6. I can say that while rotaries can be painfully loud, some...
Forum: Electrical Systems 09-27-2018, 11:59 AM
Replies: 29
Views: 3,627
Posted By rv7charlie
Paul, since that post, I've replaced the battery...

Paul, since that post, I've replaced the battery in my -4. I need to make a slight correction to my story.

The one I bought in anticipation of my annual last year is very similar to, or the same...
Forum: Electrical Systems 09-27-2018, 11:21 AM
Replies: 29
Views: 3,627
Posted By rv7charlie
Sam, my -7 plans sheet for the firewall has...

Sam, my -7 plans sheet for the firewall has drawing details for the installation of either the pc680 style battery (on the passenger side of the governor recess) or a 'standard' a/c battery (on the...
Forum: RV-4 09-27-2018, 07:43 AM
Replies: 41
Views: 5,718
Posted By rv7charlie
What kept it attached? The per-plans pop rivets...

What kept it attached? The per-plans pop rivets will 'unzip' as soon as the canopy goes open far enough to stress the ones at the front end of the hinge. I discovered that fact right after purchasing...
Forum: RV-10 09-26-2018, 07:08 AM
Replies: 31
Views: 1,729
Posted By rv7charlie
Sarcasm is more fun if there's a point to it. I...

Sarcasm is more fun if there's a point to it.

I too will be using an alternative engine controller (that controls an alternative engine, which is a risk I'm assuming you're *not* taking). I, too,...
Forum: RV-10 09-25-2018, 08:22 PM
Replies: 31
Views: 1,729
Posted By rv7charlie
Here are a few things to think about. First, the...

Here are a few things to think about. First, the technique described in the Aeroelectric book is approved for/used in certified a/c, so it must do a pretty good job of fire and CO protection. (Using...
Forum: RV General Discussion/News 09-24-2018, 12:10 PM
Replies: 3
Views: 418
Posted By rv7charlie
Thanks for posting the question; I'd never heard...

Thanks for posting the question; I'd never heard of Simmonds brand injection before. Sounds like it works like the 'Continental' system; is that the actual brand used on the medium/large Continentals?
Forum: RV General Discussion/News 09-24-2018, 11:41 AM
Replies: 52
Views: 11,552
Posted By rv7charlie
Be aware that limit switches can fail 'not-safe'....

Be aware that limit switches can fail 'not-safe'. The advantage of an actuator that can't physically extend beyond expected length is that it can't damage structure. Even a 35-40 lb actuator could...
Forum: VAF Classifieds (posts in here deleted after 30 days) 09-23-2018, 03:01 PM
Replies: 5
Views: 578
Posted By rv7charlie
Would an EIS2000 be good enough? I've got one of...

Would an EIS2000 be good enough? I've got one of each; the 2- connector and the single connector versions.

Charlie
mcsophie@gmail.com
Forum: Electrical Systems 09-18-2018, 08:17 PM
Replies: 16
Views: 1,326
Posted By rv7charlie
This subject might eventually rise to 'primer...

This subject might eventually rise to 'primer wars' levels, so I'll leave it with a point I hinted at earlier. Very few (if any) devices will be protected from damage by a circuit breaker or fuse....
Forum: Electrical Systems 09-18-2018, 05:42 PM
Replies: 16
Views: 1,326
Posted By rv7charlie
That's one of those cases where it could just be...

That's one of those cases where it could just be FAA-speak semantics, but it's either deceptive or wrong (it's probably both).

Take a look at virtually any certified a/c, and you'll see one...
Forum: Electrical Systems 09-18-2018, 12:46 PM
Replies: 16
Views: 1,326
Posted By rv7charlie
Respectfully, that's backward. Size the *wire*...

Respectfully, that's backward. Size the *wire* for the load, with acceptable voltage drop and heat rise. Then size the circuit protection to protect the wire. If that doesn't make sense, look at your...
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