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Search: Posts Made By: scsmith
Forum: VAF Classifieds (posts in here deleted after 30 days) Today, 02:14 AM
Replies: 0
Views: 71
Posted By scsmith
WTB old 600x6 inner tube

I'm looking for a non-airworthy 600x6 inner tube to use for some air ducting. (thanks to Scott McDaniels for the idea)

If you have one that is a throw-away, I will pay for shipping to get it to...
Forum: RV-8/8A Yesterday, 10:35 AM
Replies: 4
Views: 473
Posted By scsmith
Over the years, the drawings have been...

Over the years, the drawings have been renumbered, and sometimes not all the cross references to a given number are found and changed. Likely you have the drawing, but it has a different number.

In...
Forum: VAF Classifieds (posts in here deleted after 30 days) Yesterday, 01:46 AM
Replies: 14
Views: 873
Posted By scsmith
Whatever the OP is willing to pay, I'll double...

Whatever the OP is willing to pay, I'll double it!

Spring "just around the corner" at this point feels kind of like "nuclear fusion - just around the corner". It will never come.
Forum: Safety Yesterday, 01:20 AM
Replies: 22
Views: 1,472
Posted By scsmith
There apparently is a distinction here between...

There apparently is a distinction here between LSA and EAB or other certificated aircraft. It apparently is within the LSA certification process to placard "maximum" conditions, unlike EAB or other...
Forum: RV General Discussion/News Yesterday, 01:08 AM
Replies: 496
Views: 219,280
Posted By scsmith
This is old, but it made me laugh. Hockey...

This is old, but it made me laugh. Hockey goalie, baseball catcher, jousting partner, wild weasel mission pilot, javelin catcher, these are jobs for a certain type of deranged individual who seems...
Forum: RV General Discussion/News Yesterday, 12:52 AM
Replies: 496
Views: 219,280
Posted By scsmith
Cool. And you do that from Ocean City? Either...

Cool. And you do that from Ocean City? Either that, or you have one **** of a commute!
Forum: Propellers 02-16-2019, 01:08 AM
Replies: 19
Views: 479
Posted By scsmith
F=MA. It takes more torque to accelerate it, but...

F=MA.

It takes more torque to accelerate it, but it does not take any more force or torque to keep it moving at a fixed RPM.

It does take a little more lift from the wings to support the added...
Forum: Glass Cockpit 02-14-2019, 05:32 PM
Replies: 20
Views: 641
Posted By scsmith
Well, about $1K for the second radio, but then...

Well, about $1K for the second radio, but then you also need an audio panel, and it all starts to take up a lot of space on an RV-8 panel. The remote helps that some, although the instrument bay...
Forum: Glass Cockpit 02-14-2019, 01:40 PM
Replies: 20
Views: 641
Posted By scsmith
I was considering the GTN 650 as the only radio. ...

I was considering the GTN 650 as the only radio. Do I really need another?
Forum: Glass Cockpit 02-13-2019, 09:47 PM
Replies: 20
Views: 641
Posted By scsmith
How about dual nav/comms? Seems like radios are...

How about dual nav/comms? Seems like radios are so good these days that one would be OK?
Forum: RV General Discussion/News 02-13-2019, 01:10 PM
Replies: 5
Views: 739
Posted By scsmith
I think I figured it out. If I use https:, I get...

I think I figured it out.

If I use https:, I get a notice that a security credential has expired. If I use http:, I get the googley eyes /* * /

Same on iMac, HP-windows, iPad.

If I turn wifi...
Forum: RV General Discussion/News 02-12-2019, 09:46 PM
Replies: 5
Views: 739
Posted By scsmith
This is what I see: /* */ That's it. Otherwise...

This is what I see:

/* */

That's it. Otherwise a plain white page. Tried both Firefox and Safari.
Forum: RV General Discussion/News 02-12-2019, 07:23 PM
Replies: 5
Views: 739
Posted By scsmith
Vetterman Exhaust website?

What happened to Vetterman's website?
Forum: RV General Discussion/News 02-11-2019, 01:41 PM
Replies: 15
Views: 859
Posted By scsmith
Well, actually, no. The rocket is air-launched...

Well, actually, no. The rocket is air-launched from a carrier aircraft at about 40,000 ft.

When it comes back down to earth, it is not a rocket, it is a glider. So maybe it should have a glider...
Forum: RV General Discussion/News 02-10-2019, 06:22 PM
Replies: 15
Views: 859
Posted By scsmith
Yeah, I know. I always think of him though. I...

Yeah, I know. I always think of him though. I helped take the (then) new PIK-20E self-launch glider on a marketing tour through the southwest to show it off. Summer of 1978 or 79. We spent a...
Forum: RV General Discussion/News 02-10-2019, 03:23 PM
Replies: 15
Views: 859
Posted By scsmith
I guess the Virgin Galactic guys fly out of...

I guess the Virgin Galactic guys fly out of Mohave, so that kind of makes sense, although it all happens up so high I don't see why it would be important for VFR charts.

But what is at Midland? ...
Forum: RV General Discussion/News 02-10-2019, 03:02 PM
Replies: 15
Views: 859
Posted By scsmith
OT fun sectional markings

This is kinda off topic, but may be of general interest, and maybe someone that lives in the area can help.

For some reason, I happened to pull up a Sectional for Midland-Odessa area of Texas. ...
Forum: RV General Discussion/News 02-10-2019, 12:26 AM
Replies: 107
Views: 24,883
Posted By scsmith
Wow! This is the first I have seen of this whole...

Wow!
This is the first I have seen of this whole thread. What a saga. How blessed you and Pi are to have come through this all. The best hope that she continues to improve and live a totally...
Forum: RV General Discussion/News 02-09-2019, 07:59 PM
Replies: 59
Views: 4,431
Posted By scsmith
Dave, the upper cowl is essentially stopped flow,...

Dave, the upper cowl is essentially stopped flow, just mixing around with fairly low velocity. Where the flow rushes into the cooler, it has to turn around a corner along the edges, and a separation...
Forum: RV General Discussion/News 02-09-2019, 01:30 PM
Replies: 59
Views: 4,431
Posted By scsmith
All looks really good Scott. Very clever using...

All looks really good Scott. Very clever using an inner tube. What is the diameter of the tube?

In thinking about mounting the cooler on the firewall with two angles like that, I've been concerned...
Forum: RV General Discussion/News 02-09-2019, 12:23 PM
Replies: 12
Views: 1,355
Posted By scsmith
Tools? Just imagine what your camshaft looks...

Tools? Just imagine what your camshaft looks like.
Forum: RV General Discussion/News 02-08-2019, 02:31 PM
Replies: 59
Views: 4,431
Posted By scsmith
That looks like a great way to do it with the hub...

That looks like a great way to do it with the hub Dave has.
It looks like you cut off the normal flange on the cowl that extends back toward the flywheel at 45 or so.

My hub does not have a round...
Forum: RV General Discussion/News 02-08-2019, 01:26 AM
Replies: 59
Views: 4,431
Posted By scsmith
In hindsight, you are probably right. At the...

In hindsight, you are probably right. At the time, my thinking was that the velocity coming into the plenum box thru the SCAT hose is rather low, and so any loss is very small. However, I also used...
Forum: Propellers 02-08-2019, 01:15 AM
Replies: 71
Views: 12,077
Posted By scsmith
Metal spar!

Mark, you said something that raised a flag for me. Metal spar, carbon skin.

Have you exposed it to unusually high temperatures?
There is a big mismatch in thermal expansion coefficient between...
Forum: RV General Discussion/News 02-06-2019, 07:13 PM
Replies: 7
Views: 736
Posted By scsmith
Thanks Kahuna, this is exactly the info I was...

Thanks Kahuna, this is exactly the info I was looking for. I was not advocating being dishonest or fraudulent by withholding information. As Toobuilder said, if they ask what engine, I would tell...
Forum: RV General Discussion/News 02-05-2019, 11:04 PM
Replies: 7
Views: 736
Posted By scsmith
Insurance: Rocket vs RV-8 vs Super-8

It is often stated that a Rocket has higher insurance cost than an RV-8. Some say as much as 3x the rate of an RV-8 for the Rocket.

Here is a question:

If I build a Super-8, I imagine that I just...
Forum: RV General Discussion/News 02-05-2019, 06:40 PM
Replies: 59
Views: 4,431
Posted By scsmith
Long gradual (high fineness) shapes are best for...

Long gradual (high fineness) shapes are best for preventing flow separation, but long passageways with high velocities have a lot of skin friction loss. A really good augmentor (you mentioned Andy...
Forum: RV-4 02-05-2019, 06:19 PM
Replies: 3
Views: 362
Posted By scsmith
The easiest way is to add a bump to either the...

The easiest way is to add a bump to either the belly or the inside of the cowl. A belly bump should be fairly rounded on the front and extend just inside the cowl, and very gradually sloped to blend...
Forum: RV General Discussion/News 02-05-2019, 04:05 PM
Replies: 29
Views: 2,069
Posted By scsmith
Sorry for the thread drift, but I am interested...

Sorry for the thread drift, but I am interested in your oil cooler mount. It looks like it is just hovering in space there. Can you tell us about your mount?
Forum: RV General Discussion/News 02-05-2019, 02:17 PM
Replies: 59
Views: 4,431
Posted By scsmith
HI Charlie, lets see if this helps: The oil...

HI Charlie, lets see if this helps:
The oil cooler is dumping its flow into the lower cowl plenum, and as always with subsonic flow exits, the pressure in the oil cooler flow at the exit must match...
Forum: RV General Discussion/News 02-05-2019, 02:05 PM
Replies: 59
Views: 4,431
Posted By scsmith
Sometimes I wish this forum had a "like" button! ...

Sometimes I wish this forum had a "like" button! Made me smile..... a lot!
Forum: RV General Discussion/News 02-05-2019, 01:48 AM
Replies: 59
Views: 4,431
Posted By scsmith
Thanks Dan, All pretty good ideas. Certainly...

Thanks Dan,

All pretty good ideas. Certainly would have been tons easier to do all this while building. On a finished airplane, ARRGH!

So either one buys several of the manometers, or you sit and...
Forum: RV General Discussion/News 02-04-2019, 07:56 PM
Replies: 59
Views: 4,431
Posted By scsmith
I guess since you have mentioned it, I can't...

I guess since you have mentioned it, I can't resist satisfying my academic interest too. My original plan for the diffuser and the cowl nose seal was just to do what I know would make it "better"...
Forum: RV General Discussion/News 02-04-2019, 07:11 PM
Replies: 59
Views: 4,431
Posted By scsmith
Charlie, I guess the original info on an exit...

Charlie, I guess the original info on an exit diffuser increasing the velocity through the heat exchanger is Bernoulli's Equation.

And yes, we all have a very nice diffuser on the inlet side, it...
Forum: RV General Discussion/News 02-04-2019, 07:02 PM
Replies: 59
Views: 4,431
Posted By scsmith
Ross, it is a gross simplification to state one...

Ross, it is a gross simplification to state one pressure for the spinner gap. If you go back and look at your CFD results, you should see that the pressure along the bottom of the spinner where it...
Forum: RV General Discussion/News 02-04-2019, 06:12 PM
Replies: 59
Views: 4,431
Posted By scsmith
Thanks. Thats a pretty good idea. It would...

Thanks. Thats a pretty good idea. It would actually help with the diffusion too.
Forum: RV General Discussion/News 02-04-2019, 06:12 PM
Replies: 59
Views: 4,431
Posted By scsmith
Thats a pretty good idea!

Thats a pretty good idea!
Forum: RV General Discussion/News 02-04-2019, 06:10 PM
Replies: 5
Views: 569
Posted By scsmith
Also wondering about the attach hole alignment. ...

Also wondering about the attach hole alignment. Mine have been reamed for taper pins. So as long as the holes line up, I can ream the holes to match.
Forum: RV General Discussion/News 02-04-2019, 06:09 PM
Replies: 5
Views: 569
Posted By scsmith
That is good looking. A little less drag and...

That is good looking. A little less drag and maybe easier to install a fairing too.
Does it have the same ground clearance as the Bell fork?
Forum: RV General Discussion/News 02-04-2019, 03:12 PM
Replies: 5
Views: 569
Posted By scsmith
Bob, if you check carefully, you will see that...

Bob, if you check carefully, you will see that you have a different tail wheel deflection for the same rudder deflection left and right. It is 5 degrees or more different from left to right. So you...
Forum: RV General Discussion/News 02-04-2019, 02:56 PM
Replies: 59
Views: 4,431
Posted By scsmith
Exit diffuser on oil cooler to increase flow through oil cooler

I want to do some cowl work to reduce my cooling exit flow area and at the same time reduce overall frontal area.

But before I can do that, I have to do two other things. One is make a seal around...
Forum: RV General Discussion/News 02-04-2019, 02:35 PM
Replies: 5
Views: 569
Posted By scsmith
New steering link geometry

Some of you will have seen the thread that I started several years ago after a surprise groundloop occurred in a strong starboard cross wind when the steering link unexpectedly and suddenly released....
Forum: RV General Discussion/News 01-28-2019, 08:31 PM
Replies: 23
Views: 1,593
Posted By scsmith
Here are a...

Here are a couple:

https://www.aircraftspruce.com/catalog/elpages/qp-104.php?clickkey=84672

https://www.aircraftspruce.com/catalog/elpages/stratuspower11-14946.php?clickkey=84672

Yes, it does seem...
Forum: RV General Discussion/News 01-28-2019, 01:24 PM
Replies: 23
Views: 1,593
Posted By scsmith
So none of the replies here explain what is...

So none of the replies here explain what is different about the $300+ units.
Forum: Propellers 01-28-2019, 12:06 PM
Replies: 71
Views: 12,077
Posted By scsmith
I'll be darned! Well that is pretty disturbing. ...

I'll be darned! Well that is pretty disturbing. It sounds like Mark is going to get good customer service from Sensenich, but with the type of fabrication described in the link it is hard to...
Forum: RV General Discussion/News 01-27-2019, 10:08 PM
Replies: 23
Views: 1,593
Posted By scsmith
How about this...

How about this one?
https://www.aircraftspruce.com/catalog/pspages/usb-adapter.php
If not, why not?
Forum: RV General Discussion/News 01-27-2019, 08:20 PM
Replies: 23
Views: 1,593
Posted By scsmith
USB port on panel for iPad power supply

I decided I wanted to put a USB power port in my panel to plug the iPad into. So I went shopping. Several brands available in the $30-$40 range. But there are also some that are in the $300 range....
Forum: Propellers 01-27-2019, 08:09 PM
Replies: 71
Views: 12,077
Posted By scsmith
Mark I know exactly what you mean. On my WW...

Mark I know exactly what you mean. On my WW 200RV I check the metal leading edge, and otherwise just run my palm for smoothness. It would not find a crack unless the edge of the crack was ragged or...
Forum: Propellers 01-27-2019, 03:18 PM
Replies: 71
Views: 12,077
Posted By scsmith
I'm sorry -- I really was not trying to be...

I'm sorry -- I really was not trying to be critical, just cautionary to others. It was a good catch to find it. The prop is one of the things that is easy to look at every time you fly, and can have...
Forum: RV-3 01-27-2019, 01:44 PM
Replies: 13
Views: 1,673
Posted By scsmith
That Bow is a life-saver in an overturn event. ...

That Bow is a life-saver in an overturn event. If you go tip-over, be sure to have a VERY STURDY bow behind your head.
Forum: Propellers 01-26-2019, 02:13 PM
Replies: 71
Views: 12,077
Posted By scsmith
That would probably be found on a good...

That would probably be found on a good pre-flight. Don't wait until condition inspection to give your prop a close looking-over.
Forum: RV Photo/Video URLs 01-26-2019, 01:02 AM
Replies: 9
Views: 1,423
Posted By scsmith
A lot less fun and a lot less pretty, but a check...

A lot less fun and a lot less pretty, but a check of the METAR for Richland would have saved you some avgas.
Forum: RV Ongoing Maintenance Issues 01-24-2019, 08:12 PM
Replies: 22
Views: 4,497
Posted By scsmith
The one concern I would have on Bob's suggestion...

The one concern I would have on Bob's suggestion here is that if you do have a bad front bearing, it may do something bad while you are flying. I don't really know -- maybe Bob can comment on that...
Forum: RV-8/8A 01-19-2019, 08:09 PM
Replies: 17
Views: 1,160
Posted By scsmith
My drawing shows the fin spar joiner (F-681)...

My drawing shows the fin spar joiner (F-681) mounting the aft face of the stabilizer spar, and then the fin spar goes on the front face of the joiner, with a spacer. Yours will probably want to have...
Forum: RV-8/8A 01-19-2019, 12:48 PM
Replies: 17
Views: 1,160
Posted By scsmith
Drawing 27 and 27A

It is drawing 27 and 27A in my set of drawings, but they are for the older (not match-drilled) fuselage, so the numbering may have changed.

In any case, the rear spar of the horizontal stabilizer is...
Forum: Electronic Ignition Systems 01-17-2019, 09:06 PM
Replies: 17
Views: 2,707
Posted By scsmith
LOL in college I had a roommate that raced dirt...

LOL

in college I had a roommate that raced dirt bikes. I tagged along one time to watch. before a race he decided to change the spark plug. he pulled out an old Champion that had been scraped...
Forum: RV General Discussion/News 01-13-2019, 07:44 PM
Replies: 883
Views: 188,222
Posted By scsmith
I've had great luck with first designs working...

I've had great luck with first designs working well out of the box, but all your points here are spot-on.
Forum: Fuel Injection Systems 01-13-2019, 01:54 AM
Replies: 116
Views: 19,904
Posted By scsmith
I came back to this thread thinking about asking...

I came back to this thread thinking about asking if anyone would be willing to weld my intake pipes for me. I stumbled on Grubbat's thread from September that Clint at Vetterman will do it. Yippy! ...
Forum: RV-8/8A 01-09-2019, 02:24 PM
Replies: 8
Views: 2,873
Posted By scsmith
I think this is a pretty good idea, actually. I...

I think this is a pretty good idea, actually.

I have a slot in the bulkhead aft of the door, and I think it is true that the panel would have to come off to get the pin out. Maybe not.
Forum: Nosewheel vs. Tailwheel 01-09-2019, 02:16 PM
Replies: 9
Views: 1,729
Posted By scsmith
Ah. Just so.

Ah. Just so.
Forum: Safety 01-08-2019, 06:14 PM
Replies: 74
Views: 5,994
Posted By scsmith
Well, yes of course, having a higher CL-max will...

Well, yes of course, having a higher CL-max will allow you to fly farther into the back-side. But by the way, the wing span is also a squared term. The dimensional induced drag is Lift^2/(pi * q *...
Forum: RV-10 01-08-2019, 05:58 PM
Replies: 7
Views: 898
Posted By scsmith
Normally it is structural. There are cases where...

Normally it is structural. There are cases where take off weight is adjusted for altitude or temperature, but not usually for general aviation aircraft, because it is important to keep things...
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