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Search: Posts Made By: rv7charlie
Forum: Electrical Systems Yesterday, 08:17 PM
Replies: 16
Views: 954
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 Yesterday, 05:42 PM
Replies: 16
Views: 954
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 Yesterday, 12:46 PM
Replies: 16
Views: 954
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...
Forum: RV General Discussion/News 09-17-2018, 04:27 PM
Replies: 7
Views: 355
Posted By rv7charlie
Hi Bob, It was likely me that recommended the...

Hi Bob,

It was likely me that recommended the product. I'm a bit mystified at your symptoms. I've used it for several years on my RV-4 tank inspection covers. I've been back into one of them several...
Forum: Electrical Systems 09-17-2018, 12:19 PM
Replies: 16
Views: 954
Posted By rv7charlie
2% of 13.8v is 0.276V (half the drop of the other...

2% of 13.8v is 0.276V (half the drop of the other chart, and waay too conservative), so that's one difference. Another *possible* difference is that some charts/calculators expect you to enter a...
Forum: RV Building Tips/Techniques 09-15-2018, 07:33 AM
Replies: 4
Views: 374
Posted By rv7charlie
Better option is to use each twisted pair for...

Better option is to use each twisted pair for power/ground. The reason pairs are twisted for signal/data use (still an out/return) is that it helps cancel any induced noise. It is possible (though...
Forum: Electrical Systems 09-13-2018, 07:16 PM
Replies: 20
Views: 821
Posted By rv7charlie
Legend has it, waaay back when solid state...

Legend has it, waaay back when solid state avionics 1st came on the scene, they used germanium semiconductors (preceded silicon), which *were* susceptible to brownout/surge failures. The avionics...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 09-13-2018, 06:55 AM
Replies: 13
Views: 964
Posted By rv7charlie
A friend polished the floor of his shop. I must...

A friend polished the floor of his shop. I must say, if you're willing to put in the work (or write the check), it's pretty impressive, and it'll never peel off or lift from moisture....
Forum: Electrical Systems 09-13-2018, 06:42 AM
Replies: 20
Views: 821
Posted By rv7charlie
Steve, have you obtained and read The...

Steve, have you obtained and read The Aeroelectric Connection book? That's step zero, if you're wiring an a/c.

I agree about fuses.

The question about wire size is yes; the questions about...
Forum: Electrical Systems 09-13-2018, 06:23 AM
Replies: 14
Views: 3,649
Posted By rv7charlie
Oh. I thought you were asking about quality...

Oh. I thought you were asking about quality ('good/bad'). I agree that it's a pain to need yet another specialized tool, and it's folly to bet on something else making a reliable crimp (including the...
Forum: Electrical Systems 09-12-2018, 09:05 PM
Replies: 14
Views: 3,649
Posted By rv7charlie
One way to evaluate quality is service...

One way to evaluate quality is service history.
Do you know anyone that's had a wiring problem in a GM car in the last couple of decades?
Forum: RV General Discussion/News 09-10-2018, 08:26 PM
Replies: 9
Views: 895
Posted By rv7charlie
I've posted to that thread (hangar/bedrooms just...

I've posted to that thread (hangar/bedrooms just north of Jackson MS) but I don't show up in the list that's spread across the 1st 3 posts. Perhaps there are others that haven't been added. [ed....
Forum: RV-12 09-09-2018, 09:01 PM
Replies: 14
Views: 1,304
Posted By rv7charlie
Am I required to say, 'Yes, that's why I posted...

Am I required to say, 'Yes, that's why I posted the link?'

;-)
Forum: RV-12 09-09-2018, 06:59 PM
Replies: 14
Views: 1,304
Posted By rv7charlie
I found your problem....

I found your problem.
http://www.facet-purolator.com/cube/

(Scroll down the page.)

Seriously, if you could find the installation instructions on the new 'improved' Facet web site, you'd see that...
Forum: RV General Discussion/News 09-09-2018, 06:33 PM
Replies: 27
Views: 1,917
Posted By rv7charlie
It certainly seems that there would be a large...

It certainly seems that there would be a large (legal) difference between me asking another pilot to, for instance, reposition my plane to another airport, with him using the repositioning flight to...
Forum: Primers 09-08-2018, 09:10 PM
Replies: 23
Views: 1,288
Posted By rv7charlie
See post #10; the op raised the idea as an...

See post #10; the op raised the idea as an alternative to alodine.

Ken,

I'm far from qualified to give you a technical explanation, so I didn't try. But I am aware of the risk, so just wanted to...
Forum: Primers 09-08-2018, 06:02 PM
Replies: 23
Views: 1,288
Posted By rv7charlie
see post #11

see post #11
Forum: Primers 09-07-2018, 03:00 PM
Replies: 23
Views: 1,288
Posted By rv7charlie
Be aware that anodizing reduces aluminum's...

Be aware that anodizing reduces aluminum's fatigue life by a huge amount. Van's allowed for that with the wing spars, but you're rolling the dice with anything else structural.
Forum: Primers 09-06-2018, 06:23 PM
Replies: 23
Views: 1,288
Posted By rv7charlie
Alodine can't do its job without the alumiprep...

Alodine can't do its job without the alumiprep (hint: 'prep') first. My understanding is that alodine is a 'conversion coating', which is effectively another term for a special kind of 'corrosion'...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 09-06-2018, 06:12 PM
Replies: 8
Views: 1,012
Posted By rv7charlie
Nice idea, but on all the one's I've modified, I...

Nice idea, but on all the one's I've modified, I use the 'dykes' (diagonal cutting pliers; the correct name) to go under the metal rivet; not the button on top. Less chance of visible damage. And you...
Forum: VAF Classifieds (posts in here deleted after 30 days) 09-06-2018, 05:44 PM
Replies: 4
Views: 1,988
Posted By rv7charlie
I'd just like to offer a word of encouragement to...

I'd just like to offer a word of encouragement to anyone who's new to RVs and looking for an RV & can't (or is unwilling) to pay premium price for a show plane. I've never met Nate or seen his plane,...
Forum: RV General Discussion/News 09-06-2018, 01:33 PM
Replies: 9
Views: 601
Posted By rv7charlie
IIRC, fatter, rounder trailing edge gives lighter...

IIRC, fatter, rounder trailing edge gives lighter control feel but less effectiveness; sharper gives slightly heavier feel but more effectiveness.

I'd get uncomfortable going smaller on the dowel...
Forum: RV General Discussion/News 09-06-2018, 07:00 AM
Replies: 345
Views: 73,169
Posted By rv7charlie
Do you like the Bearhawk? Want big in a bush...

Do you like the Bearhawk? Want big in a bush plane? Van's needs to talk to this guy:
http://www.homebuiltairplanes.com/forums/showthread.php?t=23776
Forum: RV-9/9A 09-05-2018, 03:33 PM
Replies: 7
Views: 684
Posted By rv7charlie
Sounds like he's looking for a door that opens...

Sounds like he's looking for a door that opens inward, not out, and the spring shuts the door. I've seen them, but would say that you need to be sure the door will clear the fill tube and any other...
Forum: RV General Discussion/News 09-04-2018, 06:30 PM
Replies: 57
Views: 7,709
Posted By rv7charlie
I know of at least one carb'd -4 that started...

I know of at least one carb'd -4 that started life with a gascolator and is now flying without; it's in my hangar. It lost the gascolator after near engine stoppage at ~1k' agl after takeoff on a 100...
Forum: Engine Monitors 09-02-2018, 07:56 PM
Replies: 25
Views: 3,129
Posted By rv7charlie
Willing to roll your own? Can you code in...

Willing to roll your own? Can you code in basic?

http://circuitgizmos.com/gizmo-store/CGCOLORMAX2-Color-Maximite-Retro-Computer-p53819402

This is the processor...
Forum: RV-9/9A 09-02-2018, 07:58 AM
Replies: 18
Views: 2,257
Posted By rv7charlie
As a learning opportunity, what's to be lost by...

As a learning opportunity, what's to be lost by drilling out the affected rivets and playing around with straightening? Find an A&P in your EAA chapter who's done 'body work' on certified planes to...
Forum: RV-4 09-01-2018, 08:09 PM
Replies: 33
Views: 4,014
Posted By rv7charlie
Bummer. Glad you're OK, though. Don't give up on...

Bummer. Glad you're OK, though. Don't give up on finding it. A friend once had a canopy depart a One Design; found it in a field, undamaged. One of my neighbors has an undamaged canopy off a Soviet...
Forum: COMM 09-01-2018, 05:24 PM
Replies: 6
Views: 398
Posted By rv7charlie
What Bob said. If problem disappears, look at...

What Bob said.

If problem disappears, look at antenna feedline/connnections/grounding.

If problem remains, look at ground paths.
Forum: Engine Monitors 08-30-2018, 05:30 PM
Replies: 25
Views: 3,129
Posted By rv7charlie
Don't know, but given JPI's business practices,...

Don't know, but given JPI's business practices, I'd bet it's almost certainly correct.

FWIW, I ran into the same problem with GRT's EIS a number of years ago. Bought a used one, and I already had a...
Forum: Electrical Systems 08-27-2018, 06:48 PM
Replies: 14
Views: 758
Posted By rv7charlie
Glad you could solve it without injecting money....

Glad you could solve it without injecting money. :-)

If you have data history from the efis, I'd still check the system voltage history. If the regulator's set point is drifting upward slightly,...
Forum: Electrical Systems 08-27-2018, 02:25 PM
Replies: 14
Views: 758
Posted By rv7charlie
If your efis has data logging, look at the system...

If your efis has data logging, look at the system voltage track over the period you've been having the overcurrent notices. If the alternator is going out of spec, you should see it in the history,...
Forum: Electrical Systems 08-27-2018, 11:30 AM
Replies: 14
Views: 758
Posted By rv7charlie
Plus component tolerance drift in the vpx and/or...

Plus component tolerance drift in the vpx and/or the transponder. None of us have any way of knowing how close to the edge the vpx was operating for those years.
Forum: Electrical Systems 08-27-2018, 07:49 AM
Replies: 14
Views: 758
Posted By rv7charlie
Transponders are 250 watt+ transmitters....

Transponders are 250 watt+ transmitters. 250W/14V=17.8 amps. Duration is very, very short, so you can get away with the recommended *circuit breaker*, which is typically very slow acting. The VPX's...
Forum: Midwest 08-26-2018, 06:06 PM
Replies: 15
Views: 830
Posted By rv7charlie
It's been many years since I flew up there, but I...

It's been many years since I flew up there, but I visited several airports 'back in the day'. I've tied down at Westheimer in Norman & was happy, except when the tornado ate my Thorp.

I had a couple...
Forum: Traditional Aircraft Engines 08-26-2018, 07:30 AM
Replies: 11
Views: 1,483
Posted By rv7charlie
My dad ran water vapor 'injection' on a '59...

My dad ran water vapor 'injection' on a '59 Studebaker Lark 6 cylinder. (Newer technology than a Lyc, but only by a little bit).

He always claimed that it improved the gas mileage and performance....
Forum: RV-8/8A 08-25-2018, 08:49 PM
Replies: 15
Views: 2,698
Posted By rv7charlie
Will the lowered roll bar provide adequate...

Will the lowered roll bar provide adequate head/neck protection if it ends up on its back?
Forum: Fuel Injection Systems 08-25-2018, 09:13 AM
Replies: 94
Views: 5,542
Posted By rv7charlie
I think we have a 'failure to communicate'....

I think we have a 'failure to communicate'. :-)

If you're not splitting the fuel line until it gets to the engine by my definition I'd say that the distribution block is on the engine.

If I were...
Forum: RV-7/7A 08-25-2018, 08:38 AM
Replies: 10
Views: 1,310
Posted By rv7charlie
Van's said they've never heard a complaint like...

Van's said they've never heard a complaint like that, right?

Yeah, they have, from me, about a decade ago. So you're not alone in your frustration.

Charlie
Forum: RV Building Tips/Techniques 08-25-2018, 06:51 AM
Replies: 12
Views: 1,085
Posted By rv7charlie
I mark crosshairs through the center, extending...

I mark crosshairs through the center, extending well outside the finished hole size. On larger holes, it helps me keep the hole 'in the right spot', since the bit will walk the hole sideways with...
Forum: Fuel Injection Systems 08-24-2018, 03:01 PM
Replies: 94
Views: 5,542
Posted By rv7charlie
One thing I should have mentioned is that the...

One thing I should have mentioned is that the system I described still has a manifold pressure line to control the regulator. The regulator is on the cold side of the firewall, and a single fuel line...
Forum: Fuel Injection Systems 08-24-2018, 02:24 PM
Replies: 94
Views: 5,542
Posted By rv7charlie
Hi Mark, If you're using Ross' system you need...

Hi Mark,

If you're using Ross' system you need to plumb it to his specs.

Having said that, I can tell you that what you described earlier is often called a 'dead head' system with...
Forum: Alternative Engines 08-24-2018, 05:57 AM
Replies: 50
Views: 17,367
Posted By rv7charlie
In the quote from post #32, he said to email him...

In the quote from post #32, he said to email him if we had questions, but I didn't see an address.

One reason to shoot for 2700 at the prop is that if you're using a fixed pitch wood prop (all some...
Forum: RV General Discussion/News 08-23-2018, 06:47 PM
Replies: 18
Views: 1,341
Posted By rv7charlie
That's a fairly common practice. To really...

That's a fairly common practice. To really eliminate the risk of ground loops, some of us isolate that 2nd ground block from the airframe and run a fat ground wire back to the primary forest of tabs....
Forum: Fuel Injection Systems 08-23-2018, 12:19 PM
Replies: 94
Views: 5,542
Posted By rv7charlie
+1! I've thought about using a mega/micro squirt...

+1! I've thought about using a mega/micro squirt for years, but I've been too lazy to install the injectors and a bit leery about dialing in the fuel & ignition maps for a Lyc. I'd be grateful for...
Forum: RV Ongoing Maintenance Issues 08-22-2018, 09:46 PM
Replies: 21
Views: 2,297
Posted By rv7charlie
Thanks, but Lubriplate seems to make hundreds of...

Thanks, but Lubriplate seems to make hundreds of products. Can you narrow it down a bit?

The valves sold with the older kits do seem to need lubrication; at least the ones I've used had fuel lube in...
Forum: RV-8/8A 08-22-2018, 01:48 PM
Replies: 9
Views: 739
Posted By rv7charlie
Got it. Mine's a -7 tipup (obviously aluminum...

Got it. Mine's a -7 tipup (obviously aluminum frame), and I just used the Sika to fair in the windshield area instead of using fiberglass. Would the -7 tipup guys have the same issue you describe, if...
Forum: RV-8/8A 08-22-2018, 12:40 PM
Replies: 9
Views: 739
Posted By rv7charlie
Dan, Sika 295 UV is marketed as a plexi/lexan...

Dan,

Sika 295 UV is marketed as a plexi/lexan bonding agent for use in marine applications, with 'GRP' being the 1st substrate listed in the installation...
Forum: RV Ongoing Maintenance Issues 08-22-2018, 08:54 AM
Replies: 21
Views: 2,297
Posted By rv7charlie
speaking of fuel lube/e z turn...

Anyone know of a similar product, usable in the old brass cone fuel valves, that can be purchased from local vendors or a free shipping source like Amazon Prime? I really don't need anything else...
Forum: RV-12 08-21-2018, 08:15 PM
Replies: 14
Views: 1,619
Posted By rv7charlie
I thought the -12 had the holes punched to full...

I thought the -12 had the holes punched to full size, with no need to final drill. Is that not correct? Obviously, surface burrs left by the punch/die still need to be removed.
Forum: Electrical Systems 08-21-2018, 04:56 PM
Replies: 158
Views: 35,579
Posted By rv7charlie
OK, you win. It's a...

OK, you win. It's a myth.

https://www.google.com/search?q=alternator+load+dump&oq=alternator+load+dump&aqs=chrome..69i57j0l5.3949j0j7&sourceid=chrome&ie=UTF-8
Forum: Electrical Systems 08-21-2018, 04:00 PM
Replies: 158
Views: 35,579
Posted By rv7charlie
Hi Ross, I'm not sure we're talking about the...

Hi Ross,

I'm not sure we're talking about the same thing. Yours has a control terminal that actually tells the regulator to shut down; not all alternators from that era will shut down when power is...
Forum: Electrical Systems 08-21-2018, 02:58 PM
Replies: 158
Views: 35,579
Posted By rv7charlie
One driver of IR alternator failure rates in...

One driver of IR alternator failure rates in homebuilts is this:

The alternators typically used by homebuilders are designs originating in the 1970s through the 1990s. Few if any of these...
Forum: RV General Discussion/News 08-21-2018, 08:21 AM
Replies: 17
Views: 1,670
Posted By rv7charlie
I'd submit that you ignored the most significant...

I'd submit that you ignored the most significant factor for economy: maintenance costs (including compliance with ADs). Any mid-$teens certified a/c is quite likely to cost more in required...
Forum: Fiberglass 08-18-2018, 08:08 PM
Replies: 8
Views: 651
Posted By rv7charlie
Look for painter's plastic drop cloth.

Look for painter's plastic drop cloth.
Forum: Electrical Systems 08-18-2018, 12:59 PM
Replies: 16
Views: 1,014
Posted By rv7charlie
The op asked about installing a transponder. How...

The op asked about installing a transponder. How far do you stretch the definition of 'structure'?
Forum: Electrical Systems 08-17-2018, 04:30 PM
Replies: 16
Views: 1,014
Posted By rv7charlie
Not to speak for John, but I doubt that's what he...

Not to speak for John, but I doubt that's what he meant. You just can't measure resistances lower than an ohm or two accurately with a regular ohm meter. But a 1/2 ohm reading on a joint that was...
Forum: Electrical Systems 08-17-2018, 07:01 AM
Replies: 16
Views: 1,014
Posted By rv7charlie
You're not going to measure that with a regular...

You're not going to measure that with a regular ohm meter. The simplest way to ensure a good connection is to just use a 'star washer' or internal tooth lock washer under the screw head and the nut.
Forum: RV-14 08-16-2018, 06:18 AM
Replies: 6
Views: 763
Posted By rv7charlie
Stall current for a -7 flap motor is around 14.5...

Stall current for a -7 flap motor is around 14.5 amps. Peak inrush current will likely be close to that. Wire (and the breaker, which protects *the wire*) probably can be sized a bit smaller than...
Forum: RV-6/6A 08-15-2018, 08:26 PM
Replies: 5
Views: 598
Posted By rv7charlie
Did it fly straight prior to the incident? Have...

Did it fly straight prior to the incident?

Have you researched 'heavy wing', 'squeeze aileron trailing edge', etc?
Forum: Electrical Systems 08-15-2018, 06:56 PM
Replies: 17
Views: 2,516
Posted By rv7charlie
For making a link, you can use clear silicone...

For making a link, you can use clear silicone tubing as the thermal barrier on the small gauge stuff.

On the subject of wire designed to burn, that's kinda what a fuse usually is, isn't it? If...
Forum: COMM 08-14-2018, 11:50 AM
Replies: 13
Views: 806
Posted By rv7charlie
Do your checks with the radio *off*. If the radio...

Do your checks with the radio *off*. If the radio is breaking (RF) squelch, it'll muddy the waters in your troubleshooting. Turning it off will either eliminate it as the problem, or (potentially)...
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