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Search: Posts Made By: rv7charlie
Forum: Electrical Systems Today, 12:59 PM
Replies: 16
Views: 550
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 Yesterday, 04:30 PM
Replies: 16
Views: 550
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 Yesterday, 07:01 AM
Replies: 16
Views: 550
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: 498
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: 286
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: VAF Classifieds (posts in here deleted after 30 days) 08-15-2018, 07:33 PM
Replies: 3
Views: 563
Posted By rv7charlie
Ed, Wht AHRS comes with the ifly? I might be...

Ed,

Wht AHRS comes with the ifly? I might be interested, if locoengineer wants the radios.

Charlie
mcsophie@gmail.com
Forum: Electrical Systems 08-15-2018, 06:56 PM
Replies: 17
Views: 2,128
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: 12
Views: 417
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)...
Forum: RV General Discussion/News 08-14-2018, 08:58 AM
Replies: 9
Views: 1,821
Posted By rv7charlie
No. And no. And fuses don't protect from...

No. And no. And fuses don't protect from overvoltage, they protect from overcurrent.

The B&C regulators are the only ones I'd trust for built-in OV protection. But it's relatively simple to add...
Forum: RV-7/7A 08-14-2018, 06:37 AM
Replies: 15
Views: 1,563
Posted By rv7charlie
Sure, it's possible. But it's also possible to...

Sure, it's possible. But it's also possible to build a really ugly plane that is perfectly safe and flies great. You should have seen the ragged old Luscombe that taught me to fly. :-)

There are...
Forum: RV Ongoing Maintenance Issues 08-13-2018, 01:33 PM
Replies: 8
Views: 523
Posted By rv7charlie
The stall current for the flap motor in a -7 is...

The stall current for the flap motor in a -7 is 14.49 amps. Now, we hope that the motor will never be fully stalled, but you can bet that the inrush current when you 1st press the button is pretty...
Forum: RV-10 08-13-2018, 08:29 AM
Replies: 3
Views: 270
Posted By rv7charlie
What tool are you using? FWIW, most smart phone...

What tool are you using? FWIW, most smart phone systems have free angle finder apps available that will resolve in tenths of a degree.

Another option is to do the trig calc for that angle over a...
Forum: RV General Discussion/News 08-12-2018, 06:22 PM
Replies: 17
Views: 1,401
Posted By rv7charlie
The lease is the lease. But putting it on the...

The lease is the lease. But putting it on the FAA? I'd be asking for proof.
Forum: Alternative Engines 08-11-2018, 10:58 AM
Replies: 87
Views: 12,169
Posted By rv7charlie
I understood that you were using it to as a...

I understood that you were using it to as a charge cooler. Just wondering why methanol instead of ethanol, given the more corrosive nature of methanol. Is it really that superior to ethanol, as a...
Forum: Alternative Engines 08-11-2018, 06:06 AM
Replies: 87
Views: 12,169
Posted By rv7charlie
Are you actually running methanol mix, and not...

Are you actually running methanol mix, and not ethanol? If so, any issues with materials degradation in the methanol path?
Forum: RV General Discussion/News 08-10-2018, 10:57 AM
Replies: 78
Views: 7,942
Posted By rv7charlie
This...

This it?
https://www.amazon.com/Airtex-E8248-Performance-Multi-Port-Applications/dp/B000DN7VME/ref=sr_1_8?ie=UTF8&qid=1533920211&sr=8-8&keywords=airtex+fuel+pump

Anyone peel off the AFP sticker &...
Forum: RV General Discussion/News 08-09-2018, 08:33 AM
Replies: 18
Views: 1,120
Posted By rv7charlie
Actually, the vast majority of waste is on the...

Actually, the vast majority of waste is on the interior (not-end) ribs, & the stiffeners. The only place the tank can leak is through the rivet holes, so the only sealant that matters is in the hole,...
Forum: Fuel Injection Systems 08-09-2018, 06:12 AM
Replies: 16
Views: 864
Posted By rv7charlie
The common terms for what Dan & Ross are...

The common terms for what Dan & Ross are describing are 'sequential', for electronic systems that time each injector's firing relative to its respective valve timing, and 'batch fire', for electronic...
Forum: RV General Discussion/News 08-08-2018, 10:30 PM
Replies: 18
Views: 1,120
Posted By rv7charlie
Try a short length of pvc pipe as a 'rolling pin'...

Try a short length of pvc pipe as a 'rolling pin' to mix the sealant.
Forum: RV General Discussion/News 08-08-2018, 09:37 PM
Replies: 18
Views: 1,120
Posted By rv7charlie
Quart ziplock bags, one per batch of roughly golf...

Quart ziplock bags, one per batch of roughly golf ball size. Mix in the bag, snip a corner, and use like a cake decorating bag.

One quart kit of Flamemaster from Van did two RV-7 main tanks plus two...
Forum: RV Building Tips/Techniques 08-08-2018, 01:45 PM
Replies: 8
Views: 727
Posted By rv7charlie
Wait. For *all* the skin holes, or just one? If...

Wait.

For *all* the skin holes, or just one? If you did them all, you might be better off just using 1/8" rivets. If HS708 gets dimpled, then 1/8" rivets would seem the obvious solution to me; #30...
Forum: RV General Discussion/News 08-07-2018, 07:11 AM
Replies: 14
Views: 1,788
Posted By rv7charlie
Take a look at a few older training a/c. :-)

Take a look at a few older training a/c. :-)
Forum: Safety 08-05-2018, 01:23 PM
Replies: 214
Views: 22,880
Posted By rv7charlie
And we should all be able to afford a Ferrari....

And we should all be able to afford a Ferrari. :-)

There's a long history of 'load dump' issues with both automotive and aviation qualified (FAA blessed) alternators/regulators. I can testify; I've...
Forum: RV General Discussion/News 08-05-2018, 11:09 AM
Replies: 271
Views: 58,708
Posted By rv7charlie
Been done, though with a smaller...

Been done, though with a smaller cockpit.

https://en.wikipedia.org/wiki/Thorp_T-18
(The entry needs a lot of work; virtually no development history is there.)

The as-designed open cockpit didn't...
Forum: RV General Discussion/News 08-05-2018, 09:59 AM
Replies: 271
Views: 58,708
Posted By rv7charlie
Big 4 seat cabin, Double side doors for...

Big 4 seat cabin,
Double side doors for cargo,
Aluminum wing,
Steel tube fuselage,
Semi-STOL ground performance,
1500 lb useful load,
Reasonable cruise (135-145 kts)?

Been done.
Barrows Bearhawk....
Forum: Safety 08-04-2018, 08:07 PM
Replies: 214
Views: 22,880
Posted By rv7charlie
Unless the battery's protection circuit is...

Unless the battery's protection circuit is repeatedly disconnecting/reconnecting, and the regulator isn't quite keeping up with the load of battery charging being switched off & on abruptly.
Forum: RV General Discussion/News 08-03-2018, 08:20 PM
Replies: 5
Views: 386
Posted By rv7charlie
Have you seen the Bower...

Have you seen the Bower intake?
http://www.ramairforhomebuilts.com/products.html
Forum: RV General Discussion/News 08-03-2018, 05:37 PM
Replies: 5
Views: 296
Posted By rv7charlie
Correct. Obviously won't make a perfectly crisp...

Correct. Obviously won't make a perfectly crisp dimple like a springback die, but it will be quite serviceable. Some risk to your mushroom set or squeezer set, but that risk can be minimized with...
Forum: RV General Discussion/News 08-03-2018, 02:34 PM
Replies: 5
Views: 296
Posted By rv7charlie
It's been a long time since I did that step;...

It's been a long time since I did that step; what's the access like? If you have a scrap piece of steel that will fit on the back side, you can make a female die. Drill it #30, countersink to the...
Forum: RV General Discussion/News 08-02-2018, 02:31 PM
Replies: 3
Views: 427
Posted By rv7charlie
I have a pair that came with a -7 kit in 2008,...

I have a pair that came with a -7 kit in 2008, and stayed out of the sun in my workroom inside an 'unconditioned' hangar in MS until last year, when they were installed on my flying -4. They still...
Forum: Tools 08-01-2018, 05:51 PM
Replies: 16
Views: 1,257
Posted By rv7charlie
I've had one of...

I've had one of these
https://www.harborfreight.com/3-16-inch-air-hydraulic-riveter-93458.html
for about 15 years. I haven't built an entire plane with it, but it's served me well building a hangar...
Forum: Traditional Aircraft Engines 08-01-2018, 12:40 PM
Replies: 47
Views: 3,867
Posted By rv7charlie
You might want to read a *lot* more NTSB reports,...

You might want to read a *lot* more NTSB reports, for some perspective, before attaching any real significance to this one. 1st it wasn't an airliner. 2nd, well, it wasn't an airliner. Reservoir of...
Forum: RV General Discussion/News 08-01-2018, 07:50 AM
Replies: 3
Views: 456
Posted By rv7charlie
There must be more money in the rivets than the...

There must be more money in the rivets than the rest of the kit....

IIRC, true cherrymax rivets are supposed to be the structural equivalent of a driven rivet. Relatively easy to look up the milspec...
Forum: RV General Discussion/News 07-31-2018, 10:45 AM
Replies: 255
Views: 34,561
Posted By rv7charlie
It happened for me over a decade ago. :-)

It happened for me over a decade ago. :-)
Forum: RV General Discussion/News 07-31-2018, 10:17 AM
Replies: 255
Views: 34,561
Posted By rv7charlie
When I was still attending (admittedly, a decade...

When I was still attending (admittedly, a decade ago), the controllers were fighting to get a chance to work OSH. It was a badge honor, driving competition and waiting lists like some of you...
Forum: Alternative Engines 07-31-2018, 06:56 AM
Replies: 43
Views: 15,769
Posted By rv7charlie
Fuel burn numbers in that cruise config?

Fuel burn numbers in that cruise config?
Forum: RV General Discussion/News 07-30-2018, 09:34 AM
Replies: 10
Views: 780
Posted By rv7charlie
No reason to use one, unless you have one on hand...

No reason to use one, unless you have one on hand & don't want to spend the money on another.

It won't perform as well, but whether you can tell the difference if you're not on an antenna test...
Forum: RV-10 07-30-2018, 09:31 AM
Replies: 7
Views: 669
Posted By rv7charlie
Step one: disconnect the wire at the pump, and...

Step one: disconnect the wire at the pump, and measure from positive to ground with an ohm meter to see if there really is a dead short. (Could be a bad pump.)

Step two: with the wire held away from...
Forum: COMM 07-29-2018, 03:45 PM
Replies: 5
Views: 315
Posted By rv7charlie
Most modern transceivers have 'suppression'...

Most modern transceivers have 'suppression' interlock terminals. When wired together, each radio can suppress the other's receiver when it transmits.
Forum: COMM 07-29-2018, 08:59 AM
Replies: 5
Views: 315
Posted By rv7charlie
You might try this...

You might try this thread:
http://www.vansairforce.com/community/showthread.php?t=3831

Most use a single PTT with a selector switch to pick which radio transmits, but separate PTTs will work. Audio...
Forum: RV-6/6A 07-29-2018, 08:08 AM
Replies: 9
Views: 826
Posted By rv7charlie
Sorry; no. A trike has cg forward of the mains; a...

Sorry; no. A trike has cg forward of the mains; a t/w a/c has it aft of the mains. You think it's stable because you don't think about correcting for the instability.
Forum: COMM 07-29-2018, 07:57 AM
Replies: 10
Views: 742
Posted By rv7charlie
I'll try again. If the buzzer is switched by an...

I'll try again. If the buzzer is switched by an efis or engine monitor, the 'clock' noise from the driver's computer could be riding on the switched line. Getting it really close to a mic line might...
Forum: RV-6/6A 07-29-2018, 07:47 AM
Replies: 9
Views: 826
Posted By rv7charlie
Ahh, the (original) 8A. Mine had been metalized....

Ahh, the (original) 8A. Mine had been metalized. I learned to fly in it; a great teacher. Went straight from the Luscombe to a Thorp T-18, & had no problem at all. (For the uninitiated, the T-18 is a...
Forum: COMM 07-28-2018, 02:50 PM
Replies: 10
Views: 742
Posted By rv7charlie
Ross, What drives the buzzer? Is it a simple...

Ross,

What drives the buzzer? Is it a simple switch (like an oil pressure switch), or is it driven by an EFIS/electronic engine monitor? (hint...)

Charlie
Forum: Traditional Aircraft Engines 07-28-2018, 01:04 PM
Replies: 18
Views: 2,380
Posted By rv7charlie
Also, how tightly are we defining 'vapor lock'?...

Also, how tightly are we defining 'vapor lock'? Remember, if you have a carb'd engine, fuel can boil in the float bowl. If the fuel in the tank has heat soaked in really high temps (as was the case...
Forum: RV General Discussion/News 07-27-2018, 03:29 PM
Replies: 255
Views: 34,561
Posted By rv7charlie
As I said in my earlier post, I've had my gripes...

As I said in my earlier post, I've had my gripes with EAA's posture in the (now distant) past. But just listening to the 'data' (personal testimonials) being supplied in this thread, I doubt much of...
Forum: Alternative Engines 07-26-2018, 09:07 PM
Replies: 87
Views: 12,169
Posted By rv7charlie
Please keep posting. I'm certainly interested,...

Please keep posting. I'm certainly interested, and posting updates may well offer useful info to others who are working on alternative powerplants.
Forum: RV General Discussion/News 07-26-2018, 02:01 PM
Replies: 255
Views: 34,561
Posted By rv7charlie
I know you've been around long enough to know...

I know you've been around long enough to know better than to make that comment (unless you're just trolling me). I guess 1984 has finally arrived, and revisionist history is now the rule of the day...
Forum: Florida (North) 07-26-2018, 07:27 AM
Replies: 9
Views: 666
Posted By rv7charlie
Anyone flown in and either rented a car or were...

Anyone flown in and either rented a car or were able to get an Uber to the NAS museum? It's been a while since we visited, & I've always driven in the past. Easy & inexpensive, or hard &...
Forum: RV General Discussion/News 07-26-2018, 07:22 AM
Replies: 255
Views: 34,561
Posted By rv7charlie
I have to say that I gave up on OSH over a decade...

I have to say that I gave up on OSH over a decade ago, the year that I walked up to Homebuilt Headquarters to register and pick up my 'I flew my homebuilt to OSH' ID pin, and the volunteer told me...
Forum: RV General Discussion/News 07-23-2018, 11:35 AM
Replies: 18
Views: 897
Posted By rv7charlie
I currently have a dual, 3 cylinder, 3 phase...

I currently have a dual, 3 cylinder, 3 phase model with a tank big enough for a family to camp in. Nothing smaller will do.

-------

Now for the reality of what you actually *need*. I *built the...
Forum: RV-9/9A 07-23-2018, 06:39 AM
Replies: 9
Views: 1,734
Posted By rv7charlie
No mention of what kind of boost pump (Facet vs...

No mention of what kind of boost pump (Facet vs one of the exp injection boost pumps using an auto injection pump).

Note that if it's an auto injection pump designed for in-line use (Walbro GSL393,...
Forum: RV General Discussion/News 07-21-2018, 08:33 PM
Replies: 11
Views: 1,129
Posted By rv7charlie
To the original request,

If you're still looking for a CFI to ferry the plane with you, PM me for a name. My neighbor (near Jackson MS) is a high time pilot/CFII, and builder of around a half dozen planes including an RV-8....
Forum: RV General Discussion/News 07-21-2018, 01:01 PM
Replies: 8
Views: 525
Posted By rv7charlie
Raid your wife's nail polish stash. edit: or...

Raid your wife's nail polish stash.

edit:
or yours; there's nothing wrong with that....
Forum: RV Photo/Video URLs 07-18-2018, 11:58 AM
Replies: 82
Views: 9,309
Posted By rv7charlie
Feel free to email me off-list, for a secure...

Feel free to email me off-list, for a secure image hosting site.

Charlie
mcsophie@gmail.com
Forum: Tools 07-16-2018, 10:59 AM
Replies: 19
Views: 1,860
Posted By rv7charlie
If you know the length, you can buy virtually any...

If you know the length, you can buy virtually any blade pitch/profile/material/etc you can imagine, from a local machine shop supplier, or from a vendor like McMaster-Carr. Either will weld you a...
Forum: Traditional Aircraft Engines 07-15-2018, 03:30 PM
Replies: 9
Views: 975
Posted By rv7charlie
Did you read post #6?

Did you read post #6?
Forum: Traditional Aircraft Engines 07-14-2018, 06:31 PM
Replies: 9
Views: 975
Posted By rv7charlie
If it's a key switch & not individual switches,...

If it's a key switch & not individual switches, it's possible for the switch to ground both mags in the 'off' position, but *not* ground one or the other when in Left or Right positions.

Just a...
Forum: RV General Discussion/News 07-14-2018, 03:20 PM
Replies: 21
Views: 1,495
Posted By rv7charlie
Can't speak to FedEx (don't want to, either), but...

Can't speak to FedEx (don't want to, either), but several years ago I shipped a prop from MS to the west coast via UPS. Walking in to the intake office at the UPS distribution center, they wanted to...
Forum: RV General Discussion/News 07-13-2018, 06:24 AM
Replies: 21
Views: 1,495
Posted By rv7charlie
Can you use USPS (Postal Service) to ship to that...

Can you use USPS (Postal Service) to ship to that location?
Unless you have a commercial account with UPS, USPS Priority is almost always cheaper than UPS ground, and anywhere from 3 days to a week...
Forum: RV General Discussion/News 07-11-2018, 09:17 PM
Replies: 697
Views: 134,455
Posted By rv7charlie
If you're talking inlet/core area ratio, the K&W...

If you're talking inlet/core area ratio, the K&W ratios go beyond 3-1 with fairly short duct length. The example in the book has a rectangular inlet the same width as the core, with a flair on only...
Forum: RV General Discussion/News 07-11-2018, 08:43 PM
Replies: 697
Views: 134,455
Posted By rv7charlie
Sorry; my posts are purely about diffuser...

Sorry; my posts are purely about diffuser efficiency. The requesters may have specific needs when it comes to duct positioning.

If installation needs allow it, and you try the shape changes, you...
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