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Search: Posts Made By: scsmith
Forum: RV Ongoing Maintenance Issues 06-08-2021, 07:47 PM
Replies: 11
Views: 1,517
Posted By scsmith
Me too! And I love your alignment pins. I'm...

Me too!

And I love your alignment pins. I'm going to make me a couple.
Forum: Traditional Aircraft Engines 06-07-2021, 01:37 PM
Replies: 32
Views: 2,708
Posted By scsmith
I'm not convinced by the low CHT theory either,...

I'm not convinced by the low CHT theory either, but I am actively running the experiment. My CHTs range from 240--290F on my angle-valve engine. After 600+ hrs, the exhaust valve stems look pretty...
Forum: Traditional Aircraft Engines 06-07-2021, 12:30 AM
Replies: 32
Views: 2,708
Posted By scsmith
Thanks for posting pictures of your homemade...

Thanks for posting pictures of your homemade tools. They look good. It would be even cooler to have a couple of pictures of them installed/mounted on the cylinder so we can visualize how they work...
Forum: RV General Discussion/News 06-06-2021, 12:50 PM
Replies: 46
Views: 9,890
Posted By scsmith
The fuel flow numbers must be ROP. I do quite a...

The fuel flow numbers must be ROP. I do quite a bit better with my -8 than the table data when running LOP. 8 gph gives 195 mph = 24.3 mpg.
Forum: VAF Classifieds (posts in here deleted after 30 days) 06-05-2021, 11:45 AM
Replies: 4
Views: 493
Posted By scsmith
Wow! Bruce, can I ask what it was like when that...

Wow!

Bruce, can I ask what it was like when that broke? Were you airborne? I hear various horror stories of high/violent vibration and other things when an exhaust flange breaks, and I always...
Forum: RV General Discussion/News 06-02-2021, 03:57 PM
Replies: 44
Views: 4,844
Posted By scsmith
just a benchmark to compare:

I'm 64, 750 hrs tailwheel, 900 SEL, 1900 glider.

My RV-8, stated hull value $90K, is $1300/yr through Costello Associates in AZ.
Forum: RV General Discussion/News 05-27-2021, 01:53 AM
Replies: 39
Views: 4,113
Posted By scsmith
It seems like a real bummer that something like a...

It seems like a real bummer that something like a modest difference in density (specific gravity) would be a show-stopper.

On the other hand, the task of doing the engineering to determine whether...
Forum: RV General Discussion/News 05-27-2021, 01:46 AM
Replies: 39
Views: 4,113
Posted By scsmith
Apparently one must register and log into the...

Apparently one must register and log into the Beech forum to read this. :(
Forum: RV General Discussion/News 05-25-2021, 11:43 PM
Replies: 39
Views: 4,113
Posted By scsmith
I find this comment rather disingenuous. My...

I find this comment rather disingenuous. My experience is that federal employees in science-based branches of federal agencies are highly motivated and conscientious at fulfilling their agency...
Forum: RV General Discussion/News 05-20-2021, 12:00 AM
Replies: 68
Views: 7,682
Posted By scsmith
I have found the plastic centering ring broken on...

I have found the plastic centering ring broken on a C-182. Same curious noise inside the spinner. It was a McCauley propeller, and we found the problem while doing a compression check, one of the...
Forum: RV General Discussion/News 05-19-2021, 11:57 PM
Replies: 68
Views: 7,682
Posted By scsmith
I have about 500 hrs in a PIK-20D. I can say...

I have about 500 hrs in a PIK-20D. I can say that this is indeed possible. The PIK-20, like the Libelle, has spar end pins that engage in the root rib of the other wing. The single wing pin only...
Forum: RV General Discussion/News 05-19-2021, 01:49 PM
Replies: 68
Views: 7,682
Posted By scsmith
I co-owned a Citabria that also worked as a tow...

I co-owned a Citabria that also worked as a tow plane at the glider port, so it flew several days a week. One weekend I came out to go do some aerobatics, and I noticed a little bit of oil on the...
Forum: RV General Discussion/News 05-19-2021, 01:42 PM
Replies: 68
Views: 7,682
Posted By scsmith
There was a new Schweizer 1-36 at the gliderport,...

There was a new Schweizer 1-36 at the gliderport, and it had only flown a few times. I got a quick cockpit checkout, and was going to go up on the ridge. I felt some slop in the aileron linkage...
Forum: Traditional Aircraft Engines 05-18-2021, 01:16 AM
Replies: 33
Views: 2,696
Posted By scsmith
A little bit of thread drift, but.... I can...

A little bit of thread drift, but....
I can attest that the Continental O-470 can have the same problem if left sitting long enough. I have one. The lower position of the cam does not result in the...
Forum: Traditional Aircraft Engines 05-16-2021, 01:02 PM
Replies: 11
Views: 2,010
Posted By scsmith
Had your RV-4 engine run before storage, or was...

Had your RV-4 engine run before storage, or was it a fresh build? Big difference. Key is getting the blow-by moisture from the last time it was run out of it right away and then coat everything...
Forum: Traditional Aircraft Engines 05-16-2021, 12:34 PM
Replies: 11
Views: 2,010
Posted By scsmith
engine is junk

I've had two bad experiences now with engines that sat idle for 3--4 years. Both in California too. (ambient humidity has little to do with it - it is the crankcase blow-by moisture left in the...
Forum: RV General Discussion/News 05-14-2021, 12:49 AM
Replies: 2
Views: 552
Posted By scsmith
I put my cell phone inside the wing thru the...

I put my cell phone inside the wing thru the inspection port and take a picture, then download the picture and zoom in on the computer.
Forum: RV Building Tips/Techniques 05-13-2021, 05:37 PM
Replies: 3
Views: 578
Posted By scsmith
I would not recommend thinning "B" type Proseal...

I would not recommend thinning "B" type Proseal with MEK.

It has not been proven conclusively, but one of the primary hypotheses for the tank rivet blister problem on QB tanks from the shop in the...
Forum: RV Building Tips/Techniques 05-08-2021, 07:24 PM
Replies: 20
Views: 2,148
Posted By scsmith
Yes! it is a great application for Oops rivets. ...

Yes! it is a great application for Oops rivets. One of the uses that made Rick (uhm what was his last name? From St Louis, worked at McDonnell in St Louis?) argue that we shouldn't call them Oops...
Forum: RV Building Tips/Techniques 05-08-2021, 05:29 PM
Replies: 20
Views: 2,148
Posted By scsmith
You can use one as a jig by putting a machine...

You can use one as a jig by putting a machine screw with a hex nut on it through the part and into the threads of the plate nut. Then spin the hex nut down to clamp the plate nut in place, drill...
Forum: RV Building Tips/Techniques 05-08-2021, 03:12 PM
Replies: 20
Views: 2,148
Posted By scsmith
They work on plate nuts too!

They work on plate nuts too!
Forum: West (and Southwest) 04-30-2021, 08:36 PM
Replies: 5
Views: 382
Posted By scsmith
Yes, it used to be that the three most dangerous...

Yes, it used to be that the three most dangerous words in aviation were "hey, watch this." Then came "hold my beer." Now, they seem to be "its a boy."
Forum: RV General Discussion/News 04-30-2021, 08:10 PM
Replies: 67
Views: 10,222
Posted By scsmith
If you pull the dent "mostly" out, can you then...

If you pull the dent "mostly" out, can you then remove the skin and use it as a pattern to match-drill a new skin?

It would seem like as long as the skin can be laid out flat, this would work?
Forum: RV General Discussion/News 04-27-2021, 12:54 AM
Replies: 22
Views: 2,144
Posted By scsmith
Powerlet

When I built my -8, I installed a Powerlet socket in one of the cockpit bulkhead pillars. This is a very high quality socket and plug solution. Way better than a 'cigarette lighter' socket and...
Forum: RV-8/8A 04-26-2021, 11:18 AM
Replies: 26
Views: 2,894
Posted By scsmith
There has been lots of discussion and...

There has been lots of discussion and conversation about this.

First, PLEASE install the NAS1804 nuts, not NAS679 nuts. The NAS679 stamp-formed nuts are not sufficient for this application. Many...
Forum: RV General Discussion/News 04-24-2021, 11:48 AM
Replies: 4
Views: 321
Posted By scsmith
I would really recommend getting a McFarlane...

I would really recommend getting a McFarlane cable. They are beautifully smooth, and will last the life of your airplane. Many of us have had to change out the green cables after 400--500 hrs. It...
Forum: West (and Southwest) 04-20-2021, 07:59 PM
Replies: 12
Views: 1,343
Posted By scsmith
The main difference is the "clutching hand"...

The main difference is the "clutching hand" effect of the wind coming up the face of the mesa, curling around, then at the downwind edge (the approach end) it trips over the edge with massive sink...
Forum: International 04-14-2021, 02:43 PM
Replies: 19
Views: 3,583
Posted By scsmith
Ah, the lifting lugs look good. Nice to be able...

Ah, the lifting lugs look good. Nice to be able to pull a wheel off too! (can't do that with the 'shoe' type).
Forum: International 04-14-2021, 12:15 PM
Replies: 19
Views: 3,583
Posted By scsmith
When I pick up my tailwheel with a grunt because...

When I pick up my tailwheel with a grunt because it is so heavy, I would be really concerned about lifting the back end of the airplane with a sling under the belly, which would 'feel' even more...
Forum: RV General Discussion/News 04-14-2021, 11:26 AM
Replies: 4
Views: 831
Posted By scsmith
It does seem like there are a few very common...

It does seem like there are a few very common combinations that would lead to two or three "standard" models.

This does seem like a good idea. Even if the net business was just about the same, it...
Forum: California 04-13-2021, 07:04 PM
Replies: 2
Views: 316
Posted By scsmith
Or use the self-serve pump that is about 150 yds...

Or use the self-serve pump that is about 150 yds west of the transient parking in front of the terminal.

There are several RVs on the field, but all quietly tucked in their hangars, so you won't see...
Forum: RV General Discussion/News 04-12-2021, 09:20 PM
Replies: 226
Views: 162,988
Posted By scsmith
Woods? Vlad - you have woods where you live?

Woods? Vlad - you have woods where you live?
Forum: Traditional Aircraft Engines 04-12-2021, 09:17 PM
Replies: 6
Views: 826
Posted By scsmith
Note that these seals are for the connection of...

Note that these seals are for the connection of the induction tubes to the cylinder, not the connection of the induction tubes to the sump, which is what I thought the OP was asking about.
Forum: California 04-10-2021, 12:45 AM
Replies: 4
Views: 539
Posted By scsmith
On the way in, work with Travis Approach and they...

On the way in, work with Travis Approach and they will hand you off to the tower.
Years ago, I used to park at the Sheraton. I guess it is the Crowne Plaza now. If you will be there during normal...
Forum: RV General Discussion/News 04-02-2021, 06:09 PM
Replies: 5
Views: 794
Posted By scsmith
Wet sand with water

Wet sand with water
Forum: California 04-02-2021, 12:20 PM
Replies: 21
Views: 1,489
Posted By scsmith
Half Moon Bay has several restaurants just a...

Half Moon Bay has several restaurants just a short walk into Princeton By the Sea, off the south end of the runway. Mezza Luna, Half Moon Bay Brewing Company, and a crab shack among them.

Petaluma...
Forum: RV General Discussion/News 04-01-2021, 04:22 PM
Replies: 5
Views: 794
Posted By scsmith
Canopy restoration

I just spent two afternoons rehabilitating the canopy on my old LS6 sailplane. The canopy is 28 years old and has been poorly cared for. It was so scratched up with fine scratches and swirl marks...
Forum: Fiberglass 03-29-2021, 11:46 AM
Replies: 7
Views: 1,457
Posted By scsmith
One feature that will often yield a lighter part...

One feature that will often yield a lighter part in carbon is to not match the full properties of the aluminum part. Often the aluminum part is built with minimum gauge constraints that make it...
Forum: RV-8/8A 03-29-2021, 10:53 AM
Replies: 10
Views: 1,467
Posted By scsmith
Plus one on making a stainless steel ramp. Carl...

Plus one on making a stainless steel ramp. Carl meant 0.015”.

As a datapoint, I have a vetterman crossover exhaust with downturns.( or should I say turn-downs? ;) ) I pop-riveted external...
Forum: RV General Discussion/News 03-29-2021, 10:36 AM
Replies: 59
Views: 3,915
Posted By scsmith
I’m really glad everyone is taking this in the...

I’m really glad everyone is taking this in the spirit intended
Forum: RV General Discussion/News 03-29-2021, 10:35 AM
Replies: 59
Views: 3,915
Posted By scsmith
Ive always found that terminology strange as well...

Ive always found that terminology strange as well but isn’t that the preferred/expected terminology? Maybe a question for Ed Wischmeier (apologies if I misspell his name)
Forum: RV General Discussion/News 03-28-2021, 09:36 PM
Replies: 59
Views: 3,915
Posted By scsmith
nutplate vs plate nut

I really hate to be a nag, but the proper name for a blind anchor nut is a "plate nut". They are nuts. They happen to be formed so that they can be riveted onto a plate. The "official" GSA...
Forum: RV Building Tips/Techniques 03-28-2021, 08:40 PM
Replies: 19
Views: 1,481
Posted By scsmith
I really hate to be a nag, but the proper name...

I really hate to be a nag, but the proper name for a blind anchor nut is a "plate nut". They are nuts. They happen to be formed so that they can be riveted onto a plate. The "official" GSA...
Forum: RV Ongoing Maintenance Issues 03-22-2021, 08:16 PM
Replies: 26
Views: 2,283
Posted By scsmith
The threaded fitting is not very long - it only...

The threaded fitting is not very long - it only goes a short distance up into the filter before it meets up with the perforated tube that runs to the end of the filter, right? So you are correct,...
Forum: RV Ongoing Maintenance Issues 03-22-2021, 06:13 PM
Replies: 26
Views: 2,283
Posted By scsmith
I don't understand this. I am talking about next...

I don't understand this. I am talking about next time I change my oil (dirty oil) I will pull the filter without draining it and see if the level of metal is different. I typically get a little...
Forum: RV Ongoing Maintenance Issues 03-22-2021, 06:07 PM
Replies: 26
Views: 2,283
Posted By scsmith
Yes, I have occasionally wondered about that. ...

Yes, I have occasionally wondered about that. Maybe not every oil change, but once in a while, it would seem like a good idea to drain the cooler.
Forum: RV Ongoing Maintenance Issues 03-22-2021, 06:06 PM
Replies: 26
Views: 2,283
Posted By scsmith
I don't understand why you say this. My filter...

I don't understand why you say this. My filter sits up almost vertical, with the mounting face at the bottom. It is not uphill to anything for the oil in the center area of the filter to drain down...
Forum: RV Ongoing Maintenance Issues 03-22-2021, 01:37 PM
Replies: 26
Views: 2,283
Posted By scsmith
The VAST majority of the drain-back oil is from...

The VAST majority of the drain-back oil is from inside the filter element, so it has already been filtered. The small volume of oil around the outside of the filter element drains back through one...
Forum: Propellers 03-18-2021, 12:42 PM
Replies: 16
Views: 1,462
Posted By scsmith
I don't know about 'most'. Some models do. Some...

I don't know about 'most'. Some models do. Some models don't. Mine does not.
Forum: RV Ongoing Maintenance Issues 03-18-2021, 01:08 AM
Replies: 26
Views: 2,283
Posted By scsmith
My accessory case is my catch pan. The very first...

My accessory case is my catch pan. The very first step I do for an oil change is that I take a drift punch and put a hole in the top of the oil filter. Then I set up to drain the oil sump, take my...
Forum: Alternative Engines 03-17-2021, 09:36 PM
Replies: 58
Views: 8,136
Posted By scsmith
This is true! There is a technical paper that...

This is true! There is a technical paper that recounts the history of the R-2800 development, which boiled down to running it on a stand until the crank broke, then trying something else, repeat,...
Forum: RV-8/8A 03-16-2021, 01:02 PM
Replies: 19
Views: 2,859
Posted By scsmith
And yet, it is amazing how often I see airplanes...

And yet, it is amazing how often I see airplanes that 'got away with it'.
Forum: Propellers 03-13-2021, 06:47 PM
Replies: 16
Views: 1,462
Posted By scsmith
I'm not sure if the info I can share is...

I'm not sure if the info I can share is applicable or not.

I have a angle-valve IO-360, so 8.7 compression. (not too different from 9:1)
I also have one Light Speed ignition that runs fairly...
Forum: Traditional Aircraft Engines 03-08-2021, 06:10 PM
Replies: 243
Views: 54,626
Posted By scsmith
True, but you don't expect to see bearings wiped...

True, but you don't expect to see bearings wiped on a fresh engine. Something wasn't right.
Forum: RV-4 03-06-2021, 11:54 AM
Replies: 10
Views: 1,142
Posted By scsmith
When I originally fit my PR wheel fairings, I fit...

When I originally fit my PR wheel fairings, I fit them to 500-5 tires, but anticipated going to the 380-150x5 later, so I set the wheel fairing a little high. I didn't note the actual height in my...
Forum: RV-8/8A 03-04-2021, 07:36 PM
Replies: 22
Views: 2,942
Posted By scsmith
The gear tower mod is something you do yourself -...

The gear tower mod is something you do yourself - not a kit someone sells. You can search the forum and find lots of pictures, and discussion -- a few different variations.

IIRC the showplanes...
Forum: Fuel Injection Systems 03-04-2021, 04:33 PM
Replies: 91
Views: 9,922
Posted By scsmith
Thanks, this is helpful. I rarely get enough...

Thanks, this is helpful. I rarely get enough heat soak to have a prolonged rough running. Usually a quick run-up clears it. Once in a while when it is really hot, it coughs and barks until take-off...
Forum: Fiberglass 03-04-2021, 11:32 AM
Replies: 27
Views: 4,581
Posted By scsmith
Let us know how the flange and valve body fit...

Let us know how the flange and valve body fit together. I assumed they were the same diameter, not one a slip fit over the other. But I am curious.

You could trim the butterfly valve tube back...
Forum: Fuel Injection Systems 03-04-2021, 11:25 AM
Replies: 91
Views: 9,922
Posted By scsmith
I am curious how and to what degree a purge valve...

I am curious how and to what degree a purge valve helps hot starting on a mechanical FI. My hypothesis has always been that fuel boiling occurs in the fine stainless steel 'spider' lines that run...
Forum: Fiberglass 03-04-2021, 10:54 AM
Replies: 27
Views: 4,581
Posted By scsmith
Larry, If you have a parallel valve engine...

Larry, If you have a parallel valve engine without piston oil squirters, then Jereme is probably right. If you do a good job with the cooler air supply, you will probably have way too much cooling. ...
Forum: Fuel Injection Systems 03-04-2021, 12:04 AM
Replies: 91
Views: 9,922
Posted By scsmith
My experience with a Bendix RSA-5 and balanced...

My experience with a Bendix RSA-5 and balanced injectors is that this statement is not true. I have essentially zero GAMI spread over a reasonable range of RPM and MAP. The balance does not "fall...
Forum: Fiberglass 03-03-2021, 10:44 PM
Replies: 27
Views: 4,581
Posted By scsmith
Larry, My concern for the shutters is that when...

Larry,

My concern for the shutters is that when 'wide open' they still present a fairly significant obstruction to the flow into the cooler. For the parallel-valve 360 engines this seems to be fine...
Forum: Fiberglass 03-03-2021, 09:13 PM
Replies: 27
Views: 4,581
Posted By scsmith
You would like to keep the diffusion angles...

You would like to keep the diffusion angles shallow and the shape smooth. Brian Decker's is a very good shape.

The Anti-splat is much too abrupt a diffuser with sharp corners and big angle change....
Forum: RV General Discussion/News 03-03-2021, 11:34 AM
Replies: 38
Views: 5,283
Posted By scsmith
Wednesday was a beautiful spring day in southern...

Wednesday was a beautiful spring day in southern Oregon. We flew over to Gold Beach, had lunch, walked to the local fish market and picked up some very fresh crab to bring home for dinner.

Sunday...
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