LOC 4" Black Brant X / Questions Feedback Comments

[Aeva]

(Build Log: https://www.rocketryforum.com/threads/loc-4-black-brant-x.187792/#post-2619370)

So one thing I don’t like about the build log stuff is the inability to get feedback.. I’m basically posting two threads for the same rocket.

Anyway, what are you thoughts on adding any reinforcements to the MMT and find on this assembly? (https://www.rocketryforum.com/threads/loc-4-black-brant-x.187792/#post-2623220)

I’m comfortable leaving it as is… I doubt the motor mount or fins will be the weakest link on this rocket if anything.

 

[-Slick-Ice]

I put a fillet of epoxy on the motor tube, centering rings, and fins. A lot of it depends on what you want to do to your rocket.

 

[Aeva]

LOC leaves a lot to be desired when it comes to instruction... included in the kit is a stiffer tube ( a "stiffy"?) but it seems omitted from the steps (or is in the elusive step 5 missing from the instructions lmao: https://cdn.shopify.com/s/files/1/0568/7489/3503/files/LC-BBX4.pdf?v=1623649076). Anyway, I think I can safely assume this is to reinforce one of the couplers, but I'm unsure is whether it should be used with the forward/payload coupler (I plan to make that the AVBay and removable so that's reasonable it would need a little more rigidity than the bottom coupler which will be glued in place). It fits perfectly inside the baffle with the bulkheads though, so I really am not too confident about either answer.

Which coupler (if it should be in a coupler) should that stiff/thick tube be used in? If no one knows... I'll bug the loc guys like I probably should.

 

[-Slick-Ice]

Greetings. The stiffy should be used inside of the electronics bay. The two bulkheads (Ones for the eyebolt in the center) use threaded to pull against this coupler. There should have been separate instructions for the electronics bay.. Let me see if I have the instructions or a picture somewhere.

 

[-Slick-Ice]

https://cdn.shopify.com/s/files/1/0568/7489/3503/files/EB2-4Instructions1.pdf?v=1623655634

https://locprecision.com/collections/rocket-components/products/electronics-bays-dual-deployment

It's the 2.56-4 instructions.

I also just noticed they don't include the baffle system any more and that is an older picture. Can you include a picture of what you received?

 

[Aeva]

That make sense... but also, the playload section didn't come with all of an AVBay assembly. I do have extra BA-3.9 bulkheads and a custom sled, so it's nbd, but it wasn't very clear.

 

[loopy]

Unless the description explicitly states it comes with an av bay, it will only come with couplers and not an av bay. I just checked, and this one mentions an "optional electronics bay", so it didn't come with one by default. That being said, it should be fairly simple to create an alt bay with the pieces you have.

LOC has never really had much in the way of instructions. Basic thinking is that if you're at the point where you're buying something that big, you already know what you're doing as far as construction is concerned.

Should be a fun build, though!

 

[Aeva]

Unless the description explicitly states it comes with an av bay, it will only come with couplers and not an av bay. I just checked, and this one mentions an "optional electronics bay", so it didn't come with one by default. That being said, it should be fairly simple to create an alt bay with the pieces you have.

LOC has never really had much in the way of instructions. Basic thinking is that if you're at the point where you're buying something that big, you already know what you're doing as far as construction is concerned.

Should be a fun build, though!

Yeah, that's what I've been told, but their published instructions always have mistakes that could be caught with a quick review. This will be the 3rd 4in LOC rocket I've built (EZI65, V2, and now BBX). This one has mostly been straightforward, just never got a kit with a stiffy. I think it was just really unclear which coupler it would be in.

So far it has been! I just like BIG rockets lol.... Had to stop for a moment because I needed to rebuild my AVBay for my EZI to make it more user friendly. I want to get the baffle and booster finished tonight on the BBX. The AVBay will be a little more work since I have to choose if I want the 1in ring (I do) and adjust the tubes so I might get that done over the course of the week because I'd like to make a tool to keep the cut clean.

 

[SolarYellow]

Unless the description explicitly states it comes with an av bay, it will only come with couplers and not an av bay. I just checked, and this one mentions an "optional electronics bay", so it didn't come with one by default. That being said, it should be fairly simple to create an alt bay with the pieces you have.

LOC has never really had much in the way of instructions. Basic thinking is that if you're at the point where you're buying something that big, you already know what you're doing as far as construction is concerned.

Should be a fun build, though!

You could also just cut a ring of regular coupler or airframe and fit a gap (like gapping piston rings) so it's still a snug fit in the coupler and have the end plate bear against that.

 

[soupmanrmc]

(Build Log: https://www.rocketryforum.com/threads/loc-4-black-brant-x.187792/#post-2619370)

So one thing I don’t like about the build log stuff is the inability to get feedback.. I’m basically posting two threads for the same rocket.

Anyway, what are you thoughts on adding any reinforcements to the MMT and find on this assembly? (https://www.rocketryforum.com/threads/loc-4-black-brant-x.187792/#post-2623220)

I’m comfortable leaving it as is… I doubt the motor mount or fins will be the weakest link on this rocket if anything.

With the aft CR, did you fill in the holes, and if so did you just epoxy them?

 

[Aeva]

With the aft CR, did you fill in the holes, and if so did you just epoxy them?

nah, just left them as is. I could still fill them, but I'm not worry about it.