VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.






VAF on Twitter:
@VansAirForceNet


Go Back   VAF Forums > Search Forums
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Showing results 1 to 64 of 75
Search took 0.01 seconds.
Search: Posts Made By: idubrov
Forum: RV Building Tips/Techniques 11-16-2022, 04:37 PM
Replies: 14
Views: 792
Posted By idubrov
There are several options (assuming your rivet...

There are several options (assuming your rivet size is AN426AD3). In all cases you need to watch for the edge distance.

1. You can use the next size rivet AN426AD4 if you have edge distance and...
Forum: RV Building Tips/Techniques 11-11-2022, 01:20 PM
Replies: 14
Views: 792
Posted By idubrov
I have an opposite opinion of pneumatic vs...

I have an opposite opinion of pneumatic vs manual.

I've never used a "regular" manual squeezer, only the Cleaveland one (this one...
Forum: Safety 11-09-2022, 10:01 AM
Replies: 11
Views: 1,612
Posted By idubrov
For my education, what is wrong with the wing on...

For my education, what is wrong with the wing on the photo you attached?
Forum: Probable Cause Documents Discussed 10-25-2022, 05:46 PM
Replies: 33
Views: 5,047
Posted By idubrov
The fact that they executed a successful...

The fact that they executed a successful go-around after a bouncy landing is just a cherry on top.
Forum: My RV Build Project 10-25-2022, 12:36 PM
Replies: 13
Views: 3,385
Posted By idubrov
The Dragon: 32769 The Corner of...

The Dragon:

32769

The Corner of Despair:

32770

The deadly Hero:
Forum: Alternative Engines 10-24-2022, 09:35 AM
Replies: 85
Views: 7,196
Posted By idubrov
Reminds me a talk Preventing the Collapse of...

Reminds me a talk Preventing the Collapse of Civilization (https://www.youtube.com/watch?v=pW-SOdj4Kkk).

"We have this idea of technology marching forward, but it goes backward all the time".
Forum: Primers 10-23-2022, 08:29 PM
Replies: 34
Views: 2,930
Posted By idubrov
One thing you can do is to weigh parts before and...

One thing you can do is to weigh parts before and after the primer. This should give you some data on how much actually sticks to the parts versus overspray.
Forum: Tools 10-22-2022, 11:52 AM
Replies: 20
Views: 1,444
Posted By idubrov
Drill press -- very recommended, for much better...

Drill press -- very recommended, for much better precision on critical holes. Also, for scary things like hole saw or a fly cutter.

Band saw -- you can do without it, but would be a quality of life...
Forum: RV General Discussion/News 10-20-2022, 07:51 PM
Replies: 7
Views: 1,041
Posted By idubrov
When you spray the primer as a finish layer, do...

When you spray the primer as a finish layer, do you spray it differently? For example, thicker, to get a smoother finish? More layers? Or do you spray it exactly the same way you would spray it to...
Forum: Fuel Injection Systems 10-17-2022, 10:55 AM
Replies: 31
Views: 2,300
Posted By idubrov
Is this is something that is generally well...

Is this is something that is generally well known? What would be a good reading regarding these kind of issues in fuel supply designs?
Forum: RV Building Tips/Techniques 10-15-2022, 03:41 PM
Replies: 11
Views: 2,671
Posted By idubrov
Thought I will add one caveat with the...

Thought I will add one caveat with the reamers.

They are very good at side-cutting (drills also would do that, but to a lesser extent, in my experience), so if you are using a reamer through a thick...
Forum: RV-7/7A 10-08-2022, 01:38 PM
Replies: 3
Views: 530
Posted By idubrov
Why did you need to get F-711 out? For...

Why did you need to get F-711 out? For convenience or is it impossible to fit WD-409 if F-711 is in place already?
Forum: RV-7/7A 10-07-2022, 03:14 PM
Replies: 3
Views: 530
Posted By idubrov
How much access do I need to fit the tail spring mount?

I am currently working on the aft fuselage and my tailwheel assembly is still on a backorder.

Since I don't have WD-409 Tail Spring Mount part, I cannot fit it to the F-711 / F-712 bulkheads and the...
Forum: RV General Discussion/News 10-06-2022, 03:20 PM
Replies: 42
Views: 4,956
Posted By idubrov
I use stacking tilt bins...

I use stacking tilt bins (https://www.harborfreight.com/4-in-stacking-tilt-bin-56327.html) for the rivets:

31915

They are removable, so I can bring them to where I work. Haven't had a major rivet...
Forum: Primers 10-04-2022, 04:47 PM
Replies: 34
Views: 2,930
Posted By idubrov
PreKote + Stewart Systems EkoPoxy. I chose it...

PreKote + Stewart Systems EkoPoxy.

I chose it due to a low(-er) toxicity / health hazards. Personal protection is an individual choice, but I wanted a primer that I thought could be relatively...
Forum: RV-10 09-30-2022, 04:19 PM
Replies: 4
Views: 518
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, 09:34 PM
Replies: 2
Views: 489
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, 09:14 PM
Replies: 3
Views: 514
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, 03:17 PM
Replies: 17
Views: 1,683
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, 02:05 PM
Replies: 17
Views: 1,683
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, 09:19 PM
Replies: 17
Views: 1,683
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, 03:31 PM
Replies: 17
Views: 1,683
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, 09:36 PM
Replies: 33
Views: 4,640
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, 07:36 PM
Replies: 14
Views: 1,682
Posted By idubrov
How big is big? Is 10" enough?

How big is big? Is 10" enough?
Forum: Painting your RV 09-19-2022, 01:40 PM
Replies: 23
Views: 2,571
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, 09:34 AM
Replies: 17
Views: 1,683
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, 09:50 AM
Replies: 17
Views: 1,683
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, 09:00 AM
Replies: 23
Views: 2,571
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, 05:59 PM
Replies: 17
Views: 1,683
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, 02:48 PM
Replies: 17
Views: 1,683
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, 10:14 AM
Replies: 17
Views: 1,683
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, 09:57 AM
Replies: 17
Views: 1,683
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, 12:35 PM
Replies: 8
Views: 984
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, 10:41 PM
Replies: 12
Views: 1,960
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, 02:31 PM
Replies: 13
Views: 3,385
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, 11:14 AM
Replies: 3
Views: 1,714
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, 07:43 PM
Replies: 202
Views: 178,145
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, 10:24 AM
Replies: 202
Views: 178,145
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, 01:52 PM
Replies: 0
Views: 390
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, 08:51 AM
Replies: 13
Views: 3,318
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, 01:08 PM
Replies: 36
Views: 17,346
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, 09:27 AM
Replies: 13
Views: 3,385
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, 11:13 PM
Replies: 10
Views: 2,853
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, 09:36 AM
Replies: 13
Views: 3,385
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, 01:00 PM
Replies: 10
Views: 1,450
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, 06:58 PM
Replies: 10
Views: 1,450
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, 11:00 AM
Replies: 1
Views: 396
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, 06:40 PM
Replies: 13
Views: 3,385
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, 04:12 PM
Replies: 13
Views: 3,385
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, 04:05 PM
Replies: 36
Views: 17,346
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, 06:49 PM
Replies: 23
Views: 3,441
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 07-10-2022, 12:29 AM
Replies: 36
Views: 17,346
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, 09:57 PM
Replies: 6
Views: 599
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, 09:51 PM
Replies: 36
Views: 17,346
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, 01:19 PM
Replies: 22
Views: 4,905
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, 09:59 PM
Replies: 6
Views: 1,201
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, 05:16 PM
Replies: 6
Views: 1,201
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, 07:15 PM
Replies: 6
Views: 986
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, 05:06 PM
Replies: 6
Views: 986
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, 04:54 PM
Replies: 6
Views: 986
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, 11:12 AM
Replies: 4
Views: 578
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, 11:06 PM
Replies: 5
Views: 715
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, 09:38 PM
Replies: 5
Views: 715
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, 12:27 PM
Replies: 12
Views: 1,820
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...
Showing results 1 to 64 of 75

 
Forum Jump

All times are GMT -6. The time now is 09:37 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.