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Search: Posts Made By: idubrov
Forum: RV-10 09-30-2022, 03:19 PM
Replies: 4
Views: 240
Posted By idubrov
Those are NAS1097 rivets. Aircraft Spruce sells a...

Those are NAS1097 rivets. Aircraft Spruce sells a kit which includes both AD4 size ("oops" for a ruined AD3 hole) and AD3 size (small heads for the nutplates).
Forum: RV-7/7A 09-29-2022, 08:34 PM
Replies: 2
Views: 220
Posted By idubrov
Rudder cable fairings -- do I need a skin doubler?

Soliciting some opinions.

This is what my rudder cable fairings and their future attachment spots look like:

3166231663

Looking at all these holes, I wonder if I want a doubler plate here? Maybe,...
Forum: RV-7/7A 09-24-2022, 08:14 PM
Replies: 3
Views: 308
Posted By idubrov
Other uses for the Van's ELT brackets?

Any other uses for the ELT bracket from Vans (https://store.vansaircraft.com/elt-pwr-mount-7-9-r-elt-power-supply-bracket-right-elt-pwr-mount-7-9-r.html)?

I bought both left and right, and now I...
Forum: RV-7/7A 09-24-2022, 02:17 PM
Replies: 17
Views: 1,223
Posted By idubrov
I was able to force the clecos in both rows of...

I was able to force the clecos in both rows of the holes, but clecos were tearing the holes and were not sitting straight. Meaning oval holes after upsizing.
Forum: RV-7/7A 09-24-2022, 01:05 PM
Replies: 17
Views: 1,223
Posted By idubrov
Okay, I guess, I will still need some of your...

Okay, I guess, I will still need some of your advices on fixing the flanges :D

Overall, I am happy how the part turned out, but the edge distance on the flanges under the middle J-channel turned out...
Forum: RV-7/7A 09-21-2022, 08:19 PM
Replies: 17
Views: 1,223
Posted By idubrov
Better! Yet to see if it will actually fit the...

Better! Yet to see if it will actually fit the fuselage...

31331
Forum: RV-7/7A 09-21-2022, 02:31 PM
Replies: 17
Views: 1,223
Posted By idubrov
D'oh, this was stupid. Part turned out okay, but...

D'oh, this was stupid. Part turned out okay, but I bent one tab in the wrong direction!

Well, the second one should take less time to build :D

31314
Forum: RV Building Tips/Techniques 09-19-2022, 08:36 PM
Replies: 31
Views: 3,183
Posted By idubrov
How do I get repeatability with a flow valve...

How do I get repeatability with a flow valve setting? Try it against the wooden block and learn the "feel" of the gun?

If it was just -3 and -4 rivets, it wouldn't be an issue, but same as the...
Forum: RV Building Tips/Techniques 09-19-2022, 06:36 PM
Replies: 14
Views: 1,147
Posted By idubrov
How big is big? Is 10" enough?

How big is big? Is 10" enough?
Forum: Painting your RV 09-19-2022, 12:40 PM
Replies: 23
Views: 1,819
Posted By idubrov
My choice of water-based epoxy primer was...

My choice of water-based epoxy primer was primarily because I didn't want to worry about the fumes. I do keep the door closed so overspray dust don't get outside of the garage, but nothing beyond...
Forum: RV-7/7A 09-17-2022, 08:34 AM
Replies: 17
Views: 1,223
Posted By idubrov
Well, I am into the forming the part already,...

Well, I am into the forming the part already, going to try this puppy first, and see how it goes. Waiting for my 2024-T3 0.032" sheet stock.

31081
Forum: RV-7/7A 09-16-2022, 08:50 AM
Replies: 17
Views: 1,223
Posted By idubrov
Got my answer from Van's support, they think that...

Got my answer from Van's support, they think that I should cleco and drill the holes. I don't completely agree with that, based on my elevator experience, it won't be too terrible, but there will be...
Forum: Painting your RV 09-16-2022, 08:00 AM
Replies: 23
Views: 1,819
Posted By idubrov
I initially made a booth from the PVC pipes, but...

I initially made a booth from the PVC pipes, but disassembled it since then. It was very awkward to use, took too much space outside of it and was too small inside.

31033

Since I am using...
Forum: RV-7/7A 09-15-2022, 04:59 PM
Replies: 17
Views: 1,223
Posted By idubrov
Both sides have the same issue. Port side is...

Both sides have the same issue. Port side is slightly better, but overall has the same problem. In both cases the distance on the skin is shorter; in other words, the flanges are "too long" on both...
Forum: RV-7/7A 09-15-2022, 01:48 PM
Replies: 17
Views: 1,223
Posted By idubrov
For clarity, this is what I am talking...

For clarity, this is what I am talking about:

The bulkhead:

31007

The skin.

31008
Forum: RV-7/7A 09-15-2022, 09:14 AM
Replies: 17
Views: 1,223
Posted By idubrov
Yeah. I had a similar issue with the elevator...

Yeah. I had a similar issue with the elevator ribs, where two ribs (counter-balance rib and the end rib) are riveted back-to-back, same as the F-711 bulkhead.

In my opinion, if two ribs or bulkheads...
Forum: RV-7/7A 09-15-2022, 08:57 AM
Replies: 17
Views: 1,223
Posted By idubrov
F-711A/B holes do not align on the F-773 side skin

I am fitting the F-711 bulkhead to the skin, and two parallel vertical lines of holes on the bulkhead (one line coming from the F-711A, the front part, the other from the F-711B, the aft part) do not...
Forum: RV-12/RV-12iS 09-13-2022, 11:35 AM
Replies: 8
Views: 664
Posted By idubrov
Aluminum, especially the gummy one like 6061-T6,...

Aluminum, especially the gummy one like 6061-T6, generally likes large chips (therefore, larger teeth / lower TPI).

It's soft and gummy, so it clogs the tool, which increases heat, aluminum start...
Forum: RV-14 09-04-2022, 09:41 PM
Replies: 12
Views: 1,302
Posted By idubrov
I had a moderate success with indirect riveting...

I had a moderate success with indirect riveting technique using this bucking bar I made from a masonry chisel:

30518

This is what I got on my rudder:

30519
Forum: My RV Build Project 09-03-2022, 01:31 PM
Replies: 12
Views: 2,388
Posted By idubrov
This was "I cannot be that stupid moment". I was...

This was "I cannot be that stupid moment".

I was about to drill the holes in the F-661EF flap bearing blocks. I measured the blocks and found that even though they are exactly the same dimensions,...
Forum: RV-7/7A 09-02-2022, 10:14 AM
Replies: 3
Views: 1,660
Posted By idubrov
Getting to that part of the fuselage. I don't...

Getting to that part of the fuselage. I don't like it.

I measured the distance between two diagonal prepunched holes (they don't seem to be quite on a rectangle, but close enough), and it is ~1.015,...
Forum: RV-7/7A 08-28-2022, 06:43 PM
Replies: 202
Views: 174,401
Posted By idubrov
Got it. But I see another "gotcha" here: the...

Got it.

But I see another "gotcha" here: the firewall doubler from OP-32 reuses two of the holes on the firewall. Since it goes to the front of the firewall, the firewall (ideally) should not be...
Forum: RV-7/7A 08-28-2022, 09:24 AM
Replies: 202
Views: 174,401
Posted By idubrov
Would like to ask some clarification for "gotcha...

Would like to ask some clarification for "gotcha #14" (redoing the firewall work for the other components to be installed).

1. The gotcha mentions brake reservoir. However, DWG 19 seems to position...
Forum: RV-7/7A 08-27-2022, 12:52 PM
Replies: 0
Views: 273
Posted By idubrov
Oil canning in a section of the firewall

I think, I stretched the stainless firewall sheet while drilling the holes for the brake lines fittings and now it has a bit of oil canning in the area where F-601TD brake plate is located.

Anything...
Forum: RV General Discussion/News 08-25-2022, 07:51 AM
Replies: 13
Views: 2,832
Posted By idubrov
This is what I plan to do, the fuselage before...

This is what I plan to do, the fuselage before the wings. For what it worth, the first several steps in the fuselage seem to be relatively flat bulkheads. Also, you'll get to hold a firewall in front...
Forum: Primers 08-24-2022, 12:08 PM
Replies: 36
Views: 16,571
Posted By idubrov
To avoid creating a separate topic, any reports...

To avoid creating a separate topic, any reports on using Stewart Systems EkoPoxy without their EkoEtch etching?

How would I know that I get enough primer bonding? Is scratch / peel test few days...
Forum: My RV Build Project 08-20-2022, 08:27 AM
Replies: 12
Views: 2,388
Posted By idubrov
I guess, I am in a F-605C "extra hole" club...

I guess, I am in a F-605C "extra hole" club now.
Forum: RV-7/7A 08-18-2022, 10:13 PM
Replies: 10
Views: 2,744
Posted By idubrov
Same thing. I am not installing it any time...

Same thing.

I am not installing it any time soon, but I just don't see a way to force these holes without cutting a slot in the flange so it is more flexible.

Will see once I get there, but one...
Forum: My RV Build Project 08-17-2022, 08:36 AM
Replies: 12
Views: 2,388
Posted By idubrov
Yes, this is what I want to do. Add a nutplate...

Yes, this is what I want to do. Add a nutplate and use a bolt with a stack of washers for the weight. I wanted to put it inside the fairing, for a bit of extra safety. However, now that I think about...
Forum: RV Building Tips/Techniques 08-10-2022, 12:00 PM
Replies: 10
Views: 1,155
Posted By idubrov
That is true, but also I think it would be...

That is true, but also I think it would be helpful to understand what is (structurally) wrong with MK-319-BS where. I don't have RV-8 plans, and I might be misunderstanding which part we are talking...
Forum: RV Building Tips/Techniques 08-09-2022, 05:58 PM
Replies: 10
Views: 1,155
Posted By idubrov
Not sure why you cannot use MK319BS there. It is...

Not sure why you cannot use MK319BS there. It is similar in strength to AD3 (a bit stronger in tensile and much stronger in shear). At least, superficially, based on the numbers I got from random...
Forum: Autopilots 08-09-2022, 10:00 AM
Replies: 1
Views: 313
Posted By idubrov
Based on the specifications...

Based on the specifications (http://www.ppp-ss.com/download/ppp-ss_com/SUPERIOR%20ELECTRIC%20SLO-SYN%20MOTOR_PPP-ss.pdf), looks like a regular NEMA 23 stepper motor to me, the ones which are used in...
Forum: My RV Build Project 08-03-2022, 05:40 PM
Replies: 12
Views: 2,388
Posted By idubrov
I know, I was being a bit sarcastic, given all...

I know, I was being a bit sarcastic, given all the discussions about "crisp dimples" I've seen. I primarily use DRDT-2 which I think I set up properly (lots of pressure).

I'll try more pressure (or...
Forum: My RV Build Project 08-03-2022, 03:12 PM
Replies: 12
Views: 2,388
Posted By idubrov
Okay, so the empennage parts are somewhat...

Okay, so the empennage parts are somewhat complete (except for the fiberglass and fitting parts together).

Still debating if I want all fairings to be removable or just the rudder bottom one (and...
Forum: Primers 08-03-2022, 03:05 PM
Replies: 36
Views: 16,571
Posted By idubrov
I was curious how much weight do I add, so I...

I was curious how much weight do I add, so I weighted couple of random parts I sprayed with EkoPoxy. Two ribs and a small spar from the elevator, all fully covered.

The total weight increase was...
Forum: Painting your RV 07-11-2022, 05:49 PM
Replies: 22
Views: 2,538
Posted By idubrov
I wonder how well it would it work with Steward...

I wonder how well it would it work with Steward Systems EkoPoxy. Etching is the step that I don't particularly like right now.

One issue with Steward Systems EkoEtch is that I need to carefully...
Forum: Primers 07-09-2022, 11:29 PM
Replies: 36
Views: 16,571
Posted By idubrov
I agree. I just don't have any extensive...

I agree. I just don't have any extensive experience with primers or paint, so I don't know what is normal and what is not.

I am at the empennage stage, so at this point I mostly care that it does...
Forum: RV General Discussion/News 07-09-2022, 08:57 PM
Replies: 6
Views: 524
Posted By idubrov
Alternatively, you can use special angled dimple...

Alternatively, you can use special angled dimple dies. They are not without their quirks, though. In my experience of doing an RV-7 rudder (which is different from RV-10, though!), they tend to slip...
Forum: Primers 07-09-2022, 08:51 PM
Replies: 36
Views: 16,571
Posted By idubrov
Correction: it works fine, but only with quart...

Correction: it works fine, but only with quart lid. I tried the same on the gallon lid, and you need to go extremely slow at first or you risk breaking off the mixing blades.

I think, it is still...
Forum: RV General Discussion/News 06-25-2022, 12:19 PM
Replies: 22
Views: 4,450
Posted By idubrov
Ordered RV-7 wings (slow build) March, 30th,...

Ordered RV-7 wings (slow build) March, 30th, 2022. Crating date is currently Aug 12 2022 - Sep 2 2022.
Ordered RV-7 fuselage (slow build) May, 26th, 2022. Crating date is currently Aug 5 2022 - Aug...
Forum: RV Building Tips/Techniques 06-17-2022, 08:59 PM
Replies: 6
Views: 987
Posted By idubrov
I guess, you are right. Maybe, I don't need them...

I guess, you are right. Maybe, I don't need them removable after all.

Thanks!
Forum: RV Building Tips/Techniques 06-17-2022, 04:16 PM
Replies: 6
Views: 987
Posted By idubrov
Removable rudder tip for RV-7

I am currently building an RV-7 rudder, and I am considering changing the plan to make rudder top tip removable.

I have already drilled and dimpled the last three holes on the trailing edge on both...
Forum: RV-7/7A 06-13-2022, 06:15 PM
Replies: 6
Views: 795
Posted By idubrov
Yeah, I decided to replace it. The strip actually...

Yeah, I decided to replace it. The strip actually started to crack, so I am glad I did.

Also, I got that satisfying click at 25 lbf*in (I estimated nut plate friction to be less than 5lbf*in, so...
Forum: RV-7/7A 06-13-2022, 04:06 PM
Replies: 6
Views: 795
Posted By idubrov
Right. This is what I have, 20-25 lbf*in (pound...

Right. This is what I have, 20-25 lbf*in (pound force * inch). It's a torque screwdriver, I don't think it can deliver 20-25 lbf*ft.

P.S. The actual torque I got (before I stopped) is about 18...
Forum: RV-7/7A 06-13-2022, 03:54 PM
Replies: 6
Views: 795
Posted By idubrov
Rudder counterbalance torqueing

I was a bit overzealous torqueing the rudder counterbalance screws, which caused nutplate strip to bend a bit. The torque value was relatively low, less than 20-25 lbf*in that should be used for #10...
Forum: RV General Discussion/News 06-06-2022, 10:12 AM
Replies: 4
Views: 526
Posted By idubrov
Stiffener tapering guide hole

When tapering stiffeners (rudder, elevator, practice kit), you are told to cut between the centers of the guide holes.

If you follow that literally, you get a small notch on the stiffener where it...
Forum: RV-7/7A 06-04-2022, 10:06 PM
Replies: 5
Views: 651
Posted By idubrov
Yes, I had the same line of thought. This bottom...

Yes, I had the same line of thought. This bottom rib indeed does look important.

Also, I don't think there is much reason for oops rivets here. Since it is the whole row, I think, aesthetically it...
Forum: RV-7/7A 06-04-2022, 08:38 PM
Replies: 5
Views: 651
Posted By idubrov
Oblong holes in the rudder skin

I was drilling holes in the bottom rudder fairing attach strip (R-918) through the R-901 skins and R-904 bottom rib.

Since fairing attach strips did not have any holes, I used cleco clamps to clamp...
Forum: Electrical Systems 05-26-2022, 11:27 AM
Replies: 12
Views: 1,615
Posted By idubrov
I would add a bit of caution here: it depends on...

I would add a bit of caution here: it depends on the type of the soldering iron tip. Check your manual, if you have one.

"Older" soldering irons used to have a solid copper tips, which you would...
Forum: Electrical Systems 05-26-2022, 06:19 AM
Replies: 12
Views: 1,615
Posted By idubrov
Big yes! Also, cheap / no-name solder might say...

Big yes! Also, cheap / no-name solder might say on its label it is good ol' 60/40, but what it actually is, nobody knows. I thought I cannot solder until I bought Kester, it worked so much better. My...
Forum: RV-7/7A 05-25-2022, 04:06 PM
Replies: 10
Views: 834
Posted By idubrov
Yes, I've just started building an empennage for...

Yes, I've just started building an empennage for the 7.

Looking at the service bulletin, page 14 shows exactly all the same rivets on HS-00001 doubler I have. So I hope I got it right :D

I had the...
Forum: RV-7/7A 05-25-2022, 03:35 PM
Replies: 10
Views: 834
Posted By idubrov
Check VIEW A-A on the plans, I believe they are...

Check VIEW A-A on the plans, I believe they are visible on the plans from the HS-710 / HS-714 side (meaning you need to drill them).

This is what my part turned out to be:...
Forum: My RV Build Project 05-24-2022, 10:15 PM
Replies: 12
Views: 2,388
Posted By idubrov
...and vertical stabilizer is finally complete,...

...and vertical stabilizer is finally complete, too (after rebuilding the whole front spar assembly).

https://ivan.aero/images/vs-complete.jpeg

Some random rivets inside the vertical stabilizer (I...
Forum: Tools 05-22-2022, 12:06 PM
Replies: 9
Views: 951
Posted By idubrov
Mine were very tight, too, but after a few...

Mine were very tight, too, but after a few removals, I was able to push them with my finger. Then I use my cleco pliers to pull them...
Forum: My RV Build Project 05-21-2022, 11:19 PM
Replies: 12
Views: 2,388
Posted By idubrov
Welcome-welcome! Meanwhile, horizontal...

Welcome-welcome!

Meanwhile, horizontal stabilizer is complete! Turned out, I was intimidated by the rivet gun for no reason. Running 3/32" rivets with the mushroom set is nothing to be scared of (I...
Forum: My RV Build Project 05-21-2022, 10:48 AM
Replies: 12
Views: 2,388
Posted By idubrov
After many working sessions, getting to the point...

After many working sessions, getting to the point of no return: this nose rib is going to be hidden inside the part!

https://ivan.aero/images/hs-nose-rib.jpeg

Looks good to me. Couple of rivets are...
Forum: RV-7/7A 05-13-2022, 05:47 PM
Replies: 14
Views: 5,571
Posted By idubrov
Well, I got into the same pickle. The most...

Well, I got into the same pickle. The most embarrassing thing is that I knew there are a lot of edge distance issues in these parts, I've read all these topics. I was just not looking where I should...
Forum: Primers 05-12-2022, 07:24 PM
Replies: 36
Views: 16,571
Posted By idubrov
Okay, very late answer, but maybe it will be...

Okay, very late answer, but maybe it will be helpful to someone.

I used it with the mate paint lid -- works fine so far. It was extremely thick when I got it, I basically had to "screw" the lid into...
Forum: RV-7/7A 05-11-2022, 05:21 PM
Replies: 4
Views: 535
Posted By idubrov
Figure 6-6 in empennage section

The instructions say:



But I don't see Figure 6-6 anywhere. Where is it?
Forum: My RV Build Project 05-10-2022, 11:10 PM
Replies: 12
Views: 2,388
Posted By idubrov
RV-7 #75069

Started building an empennage kit of RV-7. Made some progress working on the vertical stabilizer.

And this is my damaged front spar assembly for the vertical...
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