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Search: Posts Made By: idubrov
Forum: RV Building Tips/Techniques 08-10-2022, 12:00 PM
Replies: 10
Views: 697
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: 697
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: 160
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: 7
Views: 1,548
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: 7
Views: 1,548
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: 32
Views: 15,651
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: 1,935
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: 32
Views: 15,651
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: 460
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: 32
Views: 15,651
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: 4,031
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: 761
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: 761
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: 644
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: 644
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: 644
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: 484
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: 609
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: 609
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: 1,492
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: 1,492
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: 779
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: 779
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: 7
Views: 1,548
Posted By idubrov
...and vertical stabilizer is finally complete,...

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

https://ivans-rv.idubrov.name/images/vs-complete.jpeg

Some random rivets inside the vertical...
Forum: Tools 05-22-2022, 12:06 PM
Replies: 9
Views: 884
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: 7
Views: 1,548
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: 7
Views: 1,548
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://ivans-rv.idubrov.name/images/hs-nose-rib.jpeg

Looks good to me. Couple...
Forum: RV-7/7A 05-13-2022, 05:47 PM
Replies: 14
Views: 5,451
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: 32
Views: 15,651
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: 430
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: 7
Views: 1,548
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...
Showing results 1 to 31 of 31

 
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