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Search: Posts Made By: scsmith
Forum: RV General Discussion/News Yesterday, 06:53 PM
Replies: 33
Views: 5,138
Posted By scsmith
New tips

I know the OP said he didn't want to change wingtips, but one solution for this lens issue is to switch to the new short wingtips from HP Aircraft LLC. Non-lighted tips are shipping now, and tips...
Forum: Electronic Ignition Systems Yesterday, 12:06 PM
Replies: 35
Views: 3,528
Posted By scsmith
Thanks. Good to know.

Thanks. Good to know.
Forum: Electronic Ignition Systems 12-01-2021, 01:44 PM
Replies: 35
Views: 3,528
Posted By scsmith
Likely. Although, Bob has a cold-air induction...

Likely. Although, Bob has a cold-air induction manifold that is super open and all cylinders have very similar shape and length tubes. I can't attest that they are all the same length though, which...
Forum: Electronic Ignition Systems 12-01-2021, 01:40 PM
Replies: 35
Views: 3,528
Posted By scsmith
Thanks Larry, that is super helpful. I never dug...

Thanks Larry, that is super helpful. I never dug inside one.
Forum: Electronic Ignition Systems 12-01-2021, 12:55 AM
Replies: 35
Views: 3,528
Posted By scsmith
Ross, why is there a difference between AV and PV...

Ross, why is there a difference between AV and PV for the same CR? I'm guessing there is a different combustion chamber shape that goes along with the different valve orientation? And the...
Forum: RV-8/8A 11-25-2021, 10:12 AM
Replies: 19
Views: 8,491
Posted By scsmith
Mostly, but not entirely. Epoxy is pretty much...

Mostly, but not entirely. Epoxy is pretty much liquid-water proof, but not gas-impermeable. So over time in humid environments, enough water vapor can diffuse into the carbon-epoxy laminate to...
Forum: RV General Discussion/News 11-24-2021, 11:52 PM
Replies: 17
Views: 1,300
Posted By scsmith
I guess you know you have been flying a long time...

I guess you know you have been flying a long time when you have to buy your third parachute.
Forum: Safety 11-22-2021, 11:01 PM
Replies: 15
Views: 1,054
Posted By scsmith
We had a three-board set-up at Sky Sailing years...

We had a three-board set-up at Sky Sailing years ago. Pretty much a daytime only thing, but pretty useful. Maybe with enough reflective tape and a pilot-activated flood light it could be seen a...
Forum: Temp / Test / Misc. (posts deleted after 2 weeks) 11-22-2021, 04:37 PM
Replies: 2
Views: 342
Posted By scsmith
Bob Mills' Rocket-6 has an RV-8 vertical tail...

Bob Mills' Rocket-6 has an RV-8 vertical tail (with enhancements). He doesn't have a c.g. problem of course with the 540 on the front.
Forum: RV General Discussion/News 11-21-2021, 10:49 PM
Replies: 10
Views: 1,010
Posted By scsmith
Names for things

So you hit one of my peeves. We use names for things to communicate clearly. It works best when we use the correct names.

plate nut, or nut plate? (Plate nut is correct)

Sorry for the thread...
Forum: Traditional Aircraft Engines 11-21-2021, 10:43 PM
Replies: 4
Views: 525
Posted By scsmith
If you go, ask them about re-grinding crankshafts.

If you go, ask them about re-grinding crankshafts.
Forum: Flight Testing 11-21-2021, 10:04 PM
Replies: 30
Views: 3,422
Posted By scsmith
Bob is correct on both counts. 1) I think at...

Bob is correct on both counts.

1) I think at that altitude, you might find a slightly better performance from zero flap than -3. Someone please try it and report back.

2) I recall from my...
Forum: RV Building Tips/Techniques 11-17-2021, 07:29 PM
Replies: 6
Views: 742
Posted By scsmith
Its a little close, but I think you will be OK. ...

Its a little close, but I think you will be OK. I have just about a 1/2" clearance at the top. You will have to open up the cut-out to maintain 5/8" gap to the tire.
Forum: RV Building Tips/Techniques 11-17-2021, 01:10 PM
Replies: 37
Views: 2,357
Posted By scsmith
There are varying qualities of carbon uni-tape,...

There are varying qualities of carbon uni-tape, but none have the ridge that woven glass tapes have. They use a cross stitch of polyester thread to hold the unidirectional fiber bundles together. ...
Forum: RV Building Tips/Techniques 11-17-2021, 01:04 PM
Replies: 37
Views: 2,357
Posted By scsmith
Ah good to know, thanks.

Ah good to know, thanks.
Forum: RV Building Tips/Techniques 11-16-2021, 02:00 PM
Replies: 37
Views: 2,357
Posted By scsmith
Its been a long time, but I think I used 0.040"...

Its been a long time, but I think I used 0.040" for the strips. (might be 0.032").

I got everything fit with straight strips, then came back and added scallops afterward. One advantage along the...
Forum: RV-7/7A 11-14-2021, 04:15 PM
Replies: 44
Views: 7,284
Posted By scsmith
Mickey, we generally have one pair of lights...

Mickey, we generally have one pair of lights aimed for flight attitude, and one pair aimed low to hit the ground when taxiing. Controlled by separate circuits
Forum: RV-7/7A 11-10-2021, 10:28 PM
Replies: 44
Views: 7,284
Posted By scsmith
Another wingtip option

And by now hopefully most people are aware that there is yet another option for wingtips for your RV-4,6,7,8.

HP Aircraft LLC is making "minimum wetted area" wingtips that take almost 14 sq ft of...
Forum: RV General Discussion/News 11-10-2021, 12:15 AM
Replies: 17
Views: 1,947
Posted By scsmith
Isn't Milbar supposed to be the top-of-the-line...

Isn't Milbar supposed to be the top-of-the-line brand for safety wire pliers? I was thinking about buying one of the smaller, one-hand operation ones. But if that is a testament to their quality...
Forum: RV General Discussion/News 11-08-2021, 07:00 PM
Replies: 21
Views: 3,312
Posted By scsmith
I finally got around to the project of re-doing...

I finally got around to the project of re-doing my oil cooler air supply. My previous installation was kind of marginal, and would not have supplied enough air as I start to close down the cowl...
Forum: Electrical Systems 11-05-2021, 11:25 PM
Replies: 10
Views: 772
Posted By scsmith
I confess to looking for a zebra in a horse...

I confess to looking for a zebra in a horse corral here, (meaning, a wild obscure idea where there is probably a simpler explanation) :

but is there any chance that the ground path (meaning the...
Forum: RV General Discussion/News 11-04-2021, 05:43 PM
Replies: 53
Views: 5,022
Posted By scsmith
And if a patent was issued, it may have expired...

And if a patent was issued, it may have expired by now?
Forum: RV General Discussion/News 11-04-2021, 05:07 PM
Replies: 6
Views: 529
Posted By scsmith
This type of stacking hangar door system would be...

This type of stacking hangar door system would be pretty easy to DIY. You could probably buy the little trolley wheels and use U-channel for a track.

17846
Forum: VAF Classifieds (posts in here deleted after 30 days) 11-02-2021, 02:46 AM
Replies: 8
Views: 1,779
Posted By scsmith
Is this a rear horizontal induction engine? ...

Is this a rear horizontal induction engine? Looking at the third picture, what is the part that is attached to the back of the sump that has kind of an elbow and four studs?
Forum: RV-8/8A 10-22-2021, 01:50 PM
Replies: 38
Views: 11,883
Posted By scsmith
These are the prettiest extensions I've seen. ...

These are the prettiest extensions I've seen. Very nice finish work. Looks totally professional. Mine are functionally similar, but nowhere near as pretty!
Forum: RV-7/7A 10-21-2021, 07:22 PM
Replies: 47
Views: 8,165
Posted By scsmith
Nice! How did you get the 'before' data? It...

Nice!

How did you get the 'before' data? It does not appear to be the same as the 'before' data you reported on with the original narrow aluminum prototype. Did you remove the first one, fly,...
Forum: RV-8/8A 10-20-2021, 07:31 PM
Replies: 38
Views: 11,883
Posted By scsmith
just another data point

just to add another data point, I made lower extensions similar to what Randy Lervold did. I bent them aft so that it changes the effective angle of the pedal to be less upright.

To me, this...
Forum: RV-8/8A 10-18-2021, 01:11 PM
Replies: 9
Views: 585
Posted By scsmith
Wow!

They are expensive!
Forum: Job Board 10-13-2021, 07:36 PM
Replies: 12
Views: 2,876
Posted By scsmith
Any plan to replace the missing fan blades?

Any plan to replace the missing fan blades?
Forum: Tools 10-09-2021, 06:58 PM
Replies: 10
Views: 1,088
Posted By scsmith
Gee, that is a really strange comment. Every...

Gee, that is a really strange comment. Every device that has a D-sub connector on the back of it gets its power and ground through that connector. Garmin boxes have special longer, heavier pins that...
Forum: Tools 10-08-2021, 08:55 PM
Replies: 10
Views: 1,088
Posted By scsmith
What about crimping the bigger power input and...

What about crimping the bigger power input and ground pins for D-sub? Surely these need a different crimper die? The bigger power and ground pins are like $2 each from Garmin!?!?!
Forum: RV General Discussion/News 10-08-2021, 12:42 PM
Replies: 27
Views: 3,657
Posted By scsmith
Wow! Not the news I expected to find on a Friday...

Wow! Not the news I expected to find on a Friday morning. Kevin, please stay connected to the VAF family regardless of what airplane(s) you end up with. You are one of the mainstays of core...
Forum: RV General Discussion/News 10-04-2021, 05:58 PM
Replies: 11
Views: 2,418
Posted By scsmith
stall speed

There have been quite a few people with questions about the change in stall speed. Comparing the short tips to the Hoerner tips, the change in wing area is 6%, so the change in stall speed will be...
Forum: RV-14 10-04-2021, 01:39 PM
Replies: 6
Views: 1,254
Posted By scsmith
Prop position

Different prop manufactures have different prop 'clocking' apparently, but my Whirl Wind 200RV prop normally stops horizontal, which is exactly between compression strokes. I guess that means all...
Forum: RV-7/7A 10-04-2021, 12:04 PM
Replies: 47
Views: 8,165
Posted By scsmith
It would be difficult to identify any kind of...

It would be difficult to identify any kind of optimum. Too small a radius and the flow may still separate. That depends on a lot of details, such as the distribution of incoming flow. Too big a...
Forum: RV-7/7A 10-03-2021, 07:27 PM
Replies: 47
Views: 8,165
Posted By scsmith
Making it wider is good. You would like to span...

Making it wider is good. You would like to span the full width of the cowl exit opening.

Making it 'longer' is not really necessary. You can accelerate flow happily around a fairly tight radius. ...
Forum: RV General Discussion/News 10-02-2021, 08:24 PM
Replies: 11
Views: 2,418
Posted By scsmith
No doubt the stall speed is increased slightly,...

No doubt the stall speed is increased slightly, but it would be very hard to measure, given the (at least on my RV-8) mushy nature of the stall. Also, no doubt the climb rate will suffer slightly. ...
Forum: RV General Discussion/News 10-01-2021, 03:04 PM
Replies: 11
Views: 2,418
Posted By scsmith
HP Aircraft now offering low-drag wingtips

Showing on today's front page is Bob Kuykendall's announcement that HP Aircraft is now offering short wingtips for RV 4,6,7,8 (and will fit Harmon Rockets too). These tips reduce wing wetted area by...
Forum: RV-8/8A 09-28-2021, 01:31 PM
Replies: 83
Views: 8,653
Posted By scsmith
Alan, are those 37-degree flares? In the photo...

Alan, are those 37-degree flares? In the photo they look kind of like 45-degree flares as would be found on automotive brake systems.
Forum: RV Ongoing Maintenance Issues 09-27-2021, 07:34 PM
Replies: 46
Views: 18,857
Posted By scsmith
I'm really pleased to see this solution from PH...

I'm really pleased to see this solution from PH Aviation. It looks like the extent of modification required for an RV-8 is simply moving the upper attachment bracket. It would also allow me to...
Forum: RV General Discussion/News 09-24-2021, 12:24 PM
Replies: 12
Views: 1,413
Posted By scsmith
You are correct, it is not a lubrication problem,...

You are correct, it is not a lubrication problem, it is a temperature problem. The McFarlane cables solve the problem.
Forum: RV General Discussion/News 09-23-2021, 12:55 PM
Replies: 12
Views: 1,413
Posted By scsmith
One thought I had is that the cable you show with...

One thought I had is that the cable you show with the segmented outer sleeve is that it is primarily used only to pull. Common on bicycle brake cables. It may not be well-suited to an application...
Forum: RV General Discussion/News 09-22-2021, 06:44 PM
Replies: 11
Views: 1,208
Posted By scsmith
The lowest-stress way is to go east along the...

The lowest-stress way is to go east along the I-80 corridor until you get to the plains, then go direct. Lots of landing options, less chance of bumpy weather, especially in the fall when mountain...
Forum: Traditional Aircraft Engines 09-22-2021, 01:17 PM
Replies: 56
Views: 16,676
Posted By scsmith
Here is a picture of Bob Mills' Rocket 6 on...

Here is a picture of Bob Mills' Rocket 6 on Saturday. You can see that there was mountain wave working everywhere, all nicely marked out by streets of lenticulars. I could have done lap races from...
Forum: Traditional Aircraft Engines 09-20-2021, 08:18 PM
Replies: 56
Views: 16,676
Posted By scsmith
Bob Mills won the 'bronze' heat on Saturday and...

Bob Mills won the 'bronze' heat on Saturday and was gridded #7 in Silver for Sunday with a RV-6S (Rocket-6). So fixed gear can get you into Silver.

He has a Lycon IO-540 (parallel valve) with...
Forum: Traditional Aircraft Engines 09-20-2021, 01:05 PM
Replies: 56
Views: 16,676
Posted By scsmith
This whole thread seems to ignore the...

This whole thread seems to ignore the demonstrated experience of many at Reno. Adding 50 Hp with a wet N2O system is pretty straightforward, with a couple of bottles it lasts for the duration of a...
Forum: RV-8/8A 09-01-2021, 07:23 PM
Replies: 17
Views: 2,206
Posted By scsmith
They are #8-32 I believe. So hex head bolts are...

They are #8-32 I believe. So hex head bolts are not readily available. I use Torx.
Forum: RV-8/8A 09-01-2021, 02:10 PM
Replies: 13
Views: 2,589
Posted By scsmith
There is the new, improved nosewheel system now...

There is the new, improved nosewheel system now from Vans. A switch to that would be a big improvement in ruggedness of any tricycle gear RV-6,7,8,9. (EDIT: Sorry, it appears the new improved nose...
Forum: COMM 09-01-2021, 01:49 PM
Replies: 6
Views: 1,205
Posted By scsmith
I have had a similar problem with my SL-40. At...

I have had a similar problem with my SL-40. At some locations, I regularly have terrible static on 132.2 Oakland Center. This is at 10.5K, so doubt it is something on the ground. One time I had a...
Forum: RV-8/8A 09-01-2021, 01:43 PM
Replies: 13
Views: 2,589
Posted By scsmith
I pretty routinely fly my RV-8 off of dirt and...

I pretty routinely fly my RV-8 off of dirt and grass strips. Some rougher than the Alvord desert. I'm very confident that the -8 would land there just fine.

I do use bigger tires than standard. ...
Forum: COMM 09-01-2021, 02:56 AM
Replies: 6
Views: 695
Posted By scsmith
I have owned several Becker radios in my gliders...

I have owned several Becker radios in my gliders and they are great radios.

They are normally configured for use with a dynamic mic, I think there might be a jumper you can reposition to use a...
Forum: RV-8/8A 08-29-2021, 02:18 PM
Replies: 17
Views: 2,206
Posted By scsmith
The answer is yes. I would not fly with the...

The answer is yes. I would not fly with the baggage floor out. The reason is that the baggage access door removes the torsional stiffness of the forward fuselage. The baggage floor provides the...
Forum: RV-8/8A 08-25-2021, 11:28 AM
Replies: 46
Views: 6,367
Posted By scsmith
The behavior of curved beams is much more...

The behavior of curved beams is much more complicated than what is predicted from simple linear stability analysis. So, while the deflection still goes to infinity at the same value of P_cr, the...
Forum: RV-8/8A 08-25-2021, 10:32 AM
Replies: 46
Views: 6,367
Posted By scsmith
My spacers ended up something like 3/16". Going...

My spacers ended up something like 3/16". Going from memory here. I trial fit with washers, then when I had the thickness right, I turned a piece of steel tube to the right length to slip over the...
Forum: Alternative Engines 08-24-2021, 08:48 PM
Replies: 16
Views: 3,103
Posted By scsmith
Retire? Please Nooooooooooo!

Retire? Please Nooooooooooo!
Forum: Alternative Engines 08-24-2021, 11:28 AM
Replies: 16
Views: 3,103
Posted By scsmith
I've been similarly day-dreaming about a Mercedes...

I've been similarly day-dreaming about a Mercedes Benz M-275 6 liter V-12. It would be perfect for a 75% scale Spitfire. As usual, the biggest challenge is a good PSRU and integration of a...
Forum: RV-8/8A 08-23-2021, 11:30 PM
Replies: 46
Views: 6,367
Posted By scsmith
An interesting wrinkle to this point is that,...

An interesting wrinkle to this point is that, believe it or not, the critical compressive load for buckling of a curved (bent) tube is the SAME as a straight tube! Strange but true.

However, with...
Forum: Engine Monitors 08-19-2021, 01:16 AM
Replies: 6
Views: 1,944
Posted By scsmith
I also have the original Kavlico sensors with my...

I also have the original Kavlico sensors with my Dynon EMS-D120. I have not had any problems with them, up until the morning of departure at OSH. When I started up, the oil pressure read "---" in...
Forum: RV Ongoing Maintenance Issues 08-18-2021, 01:58 PM
Replies: 10
Views: 2,077
Posted By scsmith
I'm wondering if there is a less-than-subtle hint...

I'm wondering if there is a less-than-subtle hint as to which FBO it was by posing his airplane with the FBO in the background in the OP picture?

So, if it is NOT the FBO in the picture, probably...
Forum: RV-8/8A 08-18-2021, 01:51 PM
Replies: 19
Views: 2,221
Posted By scsmith
Even if he has no interest in resuming making...

Even if he has no interest in resuming making parts, a set of plans would be very helpful.
Forum: RV Building Tips/Techniques 08-18-2021, 01:43 PM
Replies: 59
Views: 9,342
Posted By scsmith
Based on your pictures and BillL's comments...

Based on your pictures and BillL's comments above, it looks like this plenum is for the RV-4 with the hump in the middle. This is not a very good starting point for your application. I would see if...
Forum: RV Ongoing Maintenance Issues 08-17-2021, 11:44 PM
Replies: 10
Views: 2,077
Posted By scsmith
There are enough builders at CCR and surrounding...

There are enough builders at CCR and surrounding airports that I bet you can find someone to help you to tackle the job yourself to fit a new canopy. It will enhance your enjoyment and appreciation...
Forum: RV-8/8A 08-17-2021, 07:42 PM
Replies: 19
Views: 2,221
Posted By scsmith
I'd like to know too. Even if it was just an old...

I'd like to know too. Even if it was just an old drawing set that could be copied.

Otherwise, we would just have to roll our own.
Forum: RV-12/RV-12iS 08-16-2021, 06:09 PM
Replies: 26
Views: 4,234
Posted By scsmith
Steel is ductile enough that you can bend that...

Steel is ductile enough that you can bend that plate flat without causing undue stress on the weld. The plate will yield locally just out away from the weld.

I might try to set up a series of wood...
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