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Search: Posts Made By: scsmith
Forum: RV General Discussion/News Today, 12:14 PM
Replies: 4
Views: 282
Posted By scsmith
The two ways to change the design to reduce the...

The two ways to change the design to reduce the dutch roll mode have other consequences for handling. The easier of the two is to make the fin and/or rudder bigger. In the case of the RV-7, you...
Forum: VAF Classifieds (posts in here deleted after 30 days) Yesterday, 10:00 PM
Replies: 6
Views: 204
Posted By scsmith
You could just use AN3 bolts. Those are less...

You could just use AN3 bolts. Those are less than $3 each. And WAY stronger than a rivet. A bit heavier though.
Forum: RV Building Tips/Techniques 06-04-2020, 09:59 PM
Replies: 9
Views: 650
Posted By scsmith
I'm pretty sure the RV-14 uses the same ribs as...

I'm pretty sure the RV-14 uses the same ribs as the RV-10. So if you can measure the chord length on a -10, the 14 will be the same. If you want coordinates, I can supply them.

Likewise the...
Forum: Electrical Systems 06-04-2020, 09:49 PM
Replies: 27
Views: 1,069
Posted By scsmith
600 hrs and doing fine. blast tube on electronics...

600 hrs and doing fine.
blast tube on electronics on back end.
I have had an occurrence of the poor regulation from a high resistance connection in the modular plug. (see posts in the archives by...
Forum: RV General Discussion/News 06-03-2020, 08:47 PM
Replies: 20
Views: 4,313
Posted By scsmith
An alternative

I have a different process that has always given great results, and has the added advantage that it is pretty easy to re-open and clean up, then re-seal if needed.

I use the cork (or rubber) gasket,...
Forum: Electronic Ignition Systems 05-31-2020, 11:51 AM
Replies: 101
Views: 10,173
Posted By scsmith
And as an adjunct to Dan's question, in the bench...

And as an adjunct to Dan's question, in the bench test you did, is it safe to assume that the timing was correct when it started sparking again? Is it a sufficient bench test to just verify that it...
Forum: RV-10 05-30-2020, 10:54 PM
Replies: 5
Views: 408
Posted By scsmith
Isn't the same true of the single-bolt rear-spar...

Isn't the same true of the single-bolt rear-spar attachment of the wing? I don't recall any recommendation for anit-seize there. Seems like a very similar assembly. I can't think of any others like...
Forum: RV-14 05-30-2020, 09:58 PM
Replies: 8
Views: 645
Posted By scsmith
The ailerons have a perceived zero load at zero...

The ailerons have a perceived zero load at zero deflection because they are linked together left and right. If you disconnected them, they would both float upward to some angle, maybe -5 degrees or...
Forum: Electronic Ignition Systems 05-30-2020, 05:23 PM
Replies: 101
Views: 10,173
Posted By scsmith
Hi Bill, You have said a couple of times that...

Hi Bill,

You have said a couple of times that "he switched off his ignition" but as I read his story, I believe he only switched off one of them. Why didn't it start on the other one?

(maybe this...
Forum: Safety 05-29-2020, 12:03 AM
Replies: 76
Views: 21,522
Posted By scsmith
Well, I hold the repairman's cert. so no A&P. I...

Well, I hold the repairman's cert. so no A&P. I checked all the AD's at the time of engine install, but I confess I do not routinely look to see if new ones are out. In this case the SB is a...
Forum: Safety 05-28-2020, 10:37 PM
Replies: 76
Views: 21,522
Posted By scsmith
One example of the positive and constructive...

One example of the positive and constructive impact of this thread is the identification of this AD. I was unaware of it. At this moment, I do not know for sure if my engine has two clamps or one...
Forum: Safety 05-28-2020, 10:32 PM
Replies: 76
Views: 21,522
Posted By scsmith
In addition to the absence of the second Adel...

In addition to the absence of the second Adel clamp, the routing of the fuel lines from the spider to the injectors is non-standard, and could easily cause issues. The standard routing is fairly...
Forum: RV-8/8A 05-26-2020, 11:47 PM
Replies: 104
Views: 55,853
Posted By scsmith
Thanks for posting this picture and description. ...

Thanks for posting this picture and description. It is a great addition to the thread (ooh! is that a good pun?) to help people get the right bolts.
Forum: RV Ongoing Maintenance Issues 05-26-2020, 08:35 PM
Replies: 8
Views: 527
Posted By scsmith
the AEIO-320-E2B in my old Citabria 7KCAB went...

the AEIO-320-E2B in my old Citabria 7KCAB went 3200 hrs, most of that time towing gliders with the oil temp in the yellow but the CHT pretty cool. It flew almost every day. When we overhauled it,...
Forum: RV General Discussion/News 05-21-2020, 11:14 PM
Replies: 28
Views: 1,584
Posted By scsmith
iPad Primer

From your title, I can not resist a snarky reply: Use AKZO or any good epoxy primer. I would recommend against the self-etching primers for this application.

But to be more helpful, I just fairly...
Forum: RV General Discussion/News 05-21-2020, 07:46 PM
Replies: 16
Views: 1,481
Posted By scsmith
Bill beat me to it. Taking a sample from the...

Bill beat me to it. Taking a sample from the filter is bound to give results that are out of wack with the rest of the samples.

Seeing your iron (Fe) up in the 30's makes me feel better. Mine...
Forum: RV General Discussion/News 05-21-2020, 11:34 AM
Replies: 16
Views: 1,455
Posted By scsmith
I don't know if Lycon will just do cases? The big...

I don't know if Lycon will just do cases? The big plus with them would be the o-ring seal at the case faces rather than the old silk thread trick. The downside is that unless you are a racer or an...
Forum: RV-8/8A 05-21-2020, 12:34 AM
Replies: 4
Views: 736
Posted By scsmith
Hey be nice. That kind of talk will get you...

Hey be nice. That kind of talk will get you censored quickly here. Was going to give some constructive suggestions, but after that....nah.
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 05-18-2020, 09:20 AM
Replies: 2
Views: 383
Posted By scsmith
Ah! I didn't realize it was a re-run of such an...

Ah! I didn't realize it was a re-run of such an old episode. I understand now.
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 05-17-2020, 08:01 PM
Replies: 2
Views: 383
Posted By scsmith
Nice RV-8 formation aerobatic demo on PBS Midsomer Murders

I don't know how many of you watch PBS Masterpiece Mystery and other PBS dramas, many produced by BBC. There is one called Midsomer Murders. Midsomer is a small country town/region in England that...
Forum: Traditional vs. Alternative Powerplants 05-04-2020, 08:41 PM
Replies: 10
Views: 5,263
Posted By scsmith
What ECU are you using? Most modern automotive...

What ECU are you using? Most modern automotive engines run pretty lean at mid-power. WOT, I'm not sure. Ross could chime in here.
Forum: RV General Discussion/News 05-04-2020, 04:09 PM
Replies: 2
Views: 485
Posted By scsmith
Great. I'm glad it works, and thanks for the...

Great. I'm glad it works, and thanks for the useful data.

What this really does is increase the area at the exit of the flow path of the cooler, so that the exit pressure is set at a larger area....
Forum: RV General Discussion/News 05-04-2020, 01:46 PM
Replies: 27
Views: 3,217
Posted By scsmith
Cool flying hat.

Cool flying hat.
Forum: VAF Classifieds (posts in here deleted after 30 days) 05-04-2020, 12:37 PM
Replies: 0
Views: 159
Posted By scsmith
WTB: Becker radio (AR3201 or 4201)

Anyone have a Becker panel-mount radio they don't need?

Prefer an AR4201 but a AR3201 would be acceptable also.

A lot of them got dumped on the US market after the frequency tolerance was changed...
Forum: RV General Discussion/News 05-03-2020, 08:59 PM
Replies: 27
Views: 3,217
Posted By scsmith
this is one of those posts that makes me wish...

this is one of those posts that makes me wish there was a "like" button. Great news Bill! I'm so looking forward to hearing of your first successful ground-breaking.
Forum: RV General Discussion/News 05-03-2020, 07:08 PM
Replies: 26
Views: 1,532
Posted By scsmith
Plus 1 for Scott's home made strap duplicator. I...

Plus 1 for Scott's home made strap duplicator. I have made a few. I've even made various sizes by just riveting a couple of strips of aluminum together, drilling through both, then fitting a proper...
Forum: RV General Discussion/News 05-03-2020, 06:48 PM
Replies: 27
Views: 3,217
Posted By scsmith
I did a little medical emergency shuttle. A...

I did a little medical emergency shuttle.

A friend recently moved from San Jose to Bend, OR. She hasn't figured out the health care in Oregon yet, and still has her HMO in San Jose. On Friday AM,...
Forum: RV-6/6A 05-01-2020, 11:22 AM
Replies: 15
Views: 1,260
Posted By scsmith
I tried that technique (foot contact on the...

I tried that technique (foot contact on the up-tubes) also. I have fairly large feet, and I found that the contact point was well up on the up-tubes, so fairly close to the rotation pivots. The...
Forum: RV-6/6A 04-30-2020, 08:10 PM
Replies: 15
Views: 1,260
Posted By scsmith
One thing I noticed flying a friend's RV-6 was...

One thing I noticed flying a friend's RV-6 was that the brake pedal part of the rudder pedals was very vertical, and I had to very consciously strain to pull my toes toward me to keep off the brakes...
Forum: RV-12/RV-12iS 04-30-2020, 12:00 AM
Replies: 6
Views: 859
Posted By scsmith
Isn't "manned drone" an oxymoron?

Isn't "manned drone" an oxymoron?
Forum: RV General Discussion/News 04-27-2020, 01:37 PM
Replies: 15
Views: 2,184
Posted By scsmith
The last high-deflection shot was good shootin' ...

The last high-deflection shot was good shootin' ;)
Forum: RV-8/8A 04-27-2020, 01:25 PM
Replies: 8
Views: 707
Posted By scsmith
My wheels and discs are completely stock. I...

My wheels and discs are completely stock. I don't know exactly how much clearance I have with the 380/150-5 tires, but it isn't close enough to be a concern. For sure the tire has never touched the...
Forum: RV Building Tips/Techniques 04-22-2020, 12:24 AM
Replies: 45
Views: 3,140
Posted By scsmith
Most everyone has drilled into a finger. I am...

Most everyone has drilled into a finger. I am surprised that there have been a few exit wounds! Hope I don't join that club.

For those that pine after a high-wing RV, just think of what it is like...
Forum: Traditional Aircraft Engines 04-20-2020, 07:30 PM
Replies: 6
Views: 913
Posted By scsmith
I always use Plastigauge on crank assembly,...

I always use Plastigauge on crank assembly, although I have never assembled a Lycoming.

A good trick is where to buy Plastigage. Try walking into an Auto Zone or O'Reillys and ask for it. You...
Forum: RV-7/7A 04-14-2020, 07:27 PM
Replies: 14
Views: 1,107
Posted By scsmith
It is not a good practice to grind aluminum,...

It is not a good practice to grind aluminum, because it will load up the grind stone.

Instead, use a disc sander or belt sander. Do a little at a time to be sure it doesn't get too hot. If it is...
Forum: RV-8/8A 04-11-2020, 05:15 PM
Replies: 7
Views: 604
Posted By scsmith
I was HOPING to hear that you were changing out...

I was HOPING to hear that you were changing out the **** stamped NAS679 nuts and replacing with the high-strength 12-pt NAS1804 nuts.
Forum: RV General Discussion/News 04-10-2020, 12:35 PM
Replies: 31
Views: 2,910
Posted By scsmith
Keep an eye out for nice used ones. I have two...

Keep an eye out for nice used ones. I have two Bose X and a Lightspeed Zulu, and I haven't paid more than $500 for any of them.

I bought the Lightspeed Zulu when we got the Cessna 182 towplane,...
Forum: RV General Discussion/News 04-08-2020, 01:57 PM
Replies: 28
Views: 1,842
Posted By scsmith
Yes, WD-40 is good for machining aluminum. I...

Yes, WD-40 is good for machining aluminum. I would not call it a lubricant though. It somehow removes aluminum's affinity to stick to itself. An old-school model-maker at IBM taught me that when I...
Forum: RV-14 04-08-2020, 11:30 AM
Replies: 15
Views: 1,808
Posted By scsmith
Mehrdad, The idea would be to send samples to...

Mehrdad,

The idea would be to send samples to Don Rivera at Air Flow Performance and have him test them on the flow bench. He would measure the pressure drop across various snorkel configurations. ...
Forum: RV General Discussion/News 04-07-2020, 09:53 PM
Replies: 28
Views: 1,842
Posted By scsmith
Some others have mentioned it a little bit...

Some others have mentioned it a little bit gently, but I would not let bar soap anywhere near an aluminum airplane. In short order, you will have a very corroded mess.

By 'short order' I mean a few...
Forum: RV General Discussion/News 04-07-2020, 07:43 PM
Replies: 13
Views: 1,695
Posted By scsmith
It is about the right outside diameter for a fuel...

It is about the right outside diameter for a fuel drain o-ring, but too thick. (too small an inside diameter).

Somehow I don't think that came from your airplane, but it does nag at you, doesn't it?
Forum: RV General Discussion/News 04-05-2020, 10:40 PM
Replies: 77
Views: 11,574
Posted By scsmith
The holy hand grenade from Monty Python

...And the count shall be to three, and never to five, and not to two, except on the way to three...
Forum: RV Ongoing Maintenance Issues 04-05-2020, 10:33 PM
Replies: 8
Views: 892
Posted By scsmith
I installed the wing walk strip that Van sells. ...

I installed the wing walk strip that Van sells. Just one side only - I always board the -8 from the left wing. After 10 years and 600 hrs, mostly hangared, it still looks and feels like new. In...
Forum: RV-14 04-05-2020, 12:27 PM
Replies: 15
Views: 1,808
Posted By scsmith
Ken, with composites, there are lots of ways to...

Ken, with composites, there are lots of ways to skin a cat. The approach you describe will work, but grinding out all that flocked resin (we call it schmoo) will not be fun. It is hard, durable...
Forum: RV-14 04-05-2020, 12:02 PM
Replies: 15
Views: 1,808
Posted By scsmith
All that said, it would be cool to have Don test...

All that said, it would be cool to have Don test a couple of snorkel-filter arrangements compared to a bower type ram intake.

Dan H and others have emphasized the need for a large enough air filter....
Forum: RV-14 04-04-2020, 07:55 PM
Replies: 15
Views: 1,808
Posted By scsmith
Rather than bothering to test the undersized...

Rather than bothering to test the undersized snorkel to get hard numbers, if I were in this situation I would just focus on modifying the snorkel to provide a transition to the proper diameter at the...
Forum: RV General Discussion/News 04-03-2020, 10:02 PM
Replies: 77
Views: 11,574
Posted By scsmith
Lots of these posts make me wish this forum had a...

Lots of these posts make me wish this forum had a 'like' button!
Forum: RV General Discussion/News 04-02-2020, 08:13 PM
Replies: 77
Views: 11,574
Posted By scsmith
Lucky you have an "A". On the other hand, with a...

Lucky you have an "A". On the other hand, with a tailwheel airplane, that mistake is much less likely - you would figure it out as soon as you taxi.
Forum: RV General Discussion/News 04-02-2020, 05:39 PM
Replies: 77
Views: 11,574
Posted By scsmith
Taking off on a contest launch in my glider and...

Taking off on a contest launch in my glider and realizing I forgot to turn my oxygen on.....

In the RV, once all strapped in, started up, and then realized I left the wheel chocks in.

Didn't do my...
Forum: RV General Discussion/News 04-02-2020, 05:35 PM
Replies: 77
Views: 11,574
Posted By scsmith
Was he a former Marines pilot?

Was he a former Marines pilot?
Forum: RV-10 04-02-2020, 12:50 PM
Replies: 14
Views: 1,903
Posted By scsmith
As often the case, it is the PSRU I would worry...

As often the case, it is the PSRU I would worry about. Maybe it is really good? How could we know?
Forum: RV General Discussion/News 04-01-2020, 05:11 PM
Replies: 15
Views: 957
Posted By scsmith
Its never too late. And, there is something to be...

Its never too late.
And, there is something to be said for putting your mark on your new airplane, doing some building/modifications can make you feel more connected.

Aside from the tedium of...
Forum: RV General Discussion/News 04-01-2020, 01:38 PM
Replies: 15
Views: 957
Posted By scsmith
All this reminds me how grateful I am that I put...

All this reminds me how grateful I am that I put in the extra work to make my floorboards removable with screws rather than pop rivets. Also made cut-outs and under supports around the flap blocks...
Forum: RV-12/RV-12iS 03-31-2020, 11:55 AM
Replies: 26
Views: 3,274
Posted By scsmith
Does anyone else find this kinda disturbing that...

Does anyone else find this kinda disturbing that this came out of Synergy?
Forum: RV-10 03-30-2020, 05:42 PM
Replies: 10
Views: 1,677
Posted By scsmith
I think I agree. It is one thing to reverse a...

I think I agree. It is one thing to reverse a dimple on just one or two holes. Lots of margin in most places in riveted structures.

But if a whole skin is dimpled the wrong way, it may be a...
Forum: Traditional Aircraft Engines 03-30-2020, 12:28 PM
Replies: 14
Views: 1,423
Posted By scsmith
The benefit of using the proper pin is that it...

The benefit of using the proper pin is that it has several stepped diameters and absolutely only fits in one place all the way in. Using a 1/16" drill rod can work, but I think there may be other...
Forum: Traditional Aircraft Engines 03-29-2020, 12:02 PM
Replies: 14
Views: 1,423
Posted By scsmith
Before you remove it, set the prop at 25 degrees...

Before you remove it, set the prop at 25 degrees BTDC on #1 (or whatever your timing says). Be sure it is #1 firing stroke, not #1 exhaust stroke by putting a finger over the spark-plug hole and...
Forum: RV-14 03-29-2020, 12:51 AM
Replies: 11
Views: 1,024
Posted By scsmith
Leaks like that cause drag. I would not leave a...

Leaks like that cause drag. I would not leave a gap.

What I did was after final assembly including final paint, I put a strip of vinyl tape along the edge that was a pretty close color match to the...
Forum: RV-14 03-28-2020, 12:24 PM
Replies: 22
Views: 5,450
Posted By scsmith
This is fairly important and it doesn't seem like...

This is fairly important and it doesn't seem like a lot of the builders here are doing anything about it. I am not intimately familiar with this set-up, so forgive me if I am talking out of school. ...
Forum: RV-8/8A 03-25-2020, 09:29 PM
Replies: 104
Views: 55,853
Posted By scsmith
Yes, just the four outboard gear bolts that go...

Yes, just the four outboard gear bolts that go through the U803 saddles.

Not 240 ft-lbs of torque though! 8^O
Forum: RV General Discussion/News 03-25-2020, 09:25 PM
Replies: 5
Views: 1,368
Posted By scsmith
That is fantastic. So she will probably fly P-3s...

That is fantastic. So she will probably fly P-3s and C-130s?
Forum: RV General Discussion/News 03-24-2020, 12:13 AM
Replies: 25
Views: 2,436
Posted By scsmith
Evan, As you experiment back and forth with the...

Evan,

As you experiment back and forth with the different angles, please be absolutely sure that the attachment block is not able to twist within bolt clearance, allowing the wheel to rock to the...
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