Downsides to just gluing ebay & coupler to aft body?

[Alan R]

I've just started building my secret santa LOC Iris 2".

It has an ebay section. I don't dual deploy and don't see myself ever using it as such.
I have tracker and altimeter, but those can just be attached to nc or shock cord.

Downside to just glueing coupler and ebay section permanently to body?
Or is there some other good method to attach for future use (screws?)

 

[tsmith1315]

I use screws to facilitate repair, shock cord changes and such. Drill and harden the holes with CA, it'll make decent threads in cardboard.

 

[Alan R]

what do you use for the nuts on the inside?

I use screws to facilitate repair, shock cord changes and such. Drill and harden the holes with CA, it'll make decent threads in cardboard.

 

[bobbyg23]

what do you use for the nuts on the inside?

No nuts needed. Just drill and tap holes for the screws and harden it with CA glue. That is plenty strong.

 

[Alan R]

No nuts needed. Just drill and tap holes for the screws and harden it with CA glue. That is plenty strong.

I was thinking about problems with laundry catching on screws

 

[bobbyg23]

I was thinking about problems with laundry catching on screws

Screws will be inside the upper section where the altimeter is. Laundry will be in the lower section of the rocket.

 

[bobbyg23]

This one is glued in.

 

[bobbyg23]

This one is screwed in. You can see where some of the CA ran down the inner tube when I hardened the holes. Either methed works just fine.

 

[mtnmanak]

If you want to use nuts in the coupler, you would usually use a PEM style nut:

https://www.mcmaster.com/pem/stainless-steel-press-fit-nuts-for-soft-metal-and-plastic-7/
If those are too thick (the "neck" on those is about 1/16" thick), the ones for thin sheet metal have shorter necks (look at the "minimum panel thickness"): https://www.mcmaster.com/pem/steel-press-fit-nuts-for-sheet-metal-8/

I usually use 6-32 nuts/screws on smaller rockets, 8-32 on medium rockets and 1/4"-20 on bigger rockets. Anything smaller than that, just use plastic rivets.

You just epoxy them in:

 

[Alan R]

Screws will be inside the upper section where the altimeter is. Laundry will be in the lower section of the rocket.

Actually what I'm seeing is this: No bulkhead. Altimeter up front, chute behind would have to go thru coupler.

If you want to use nuts in the coupler, you would usually use a PEM style nut:

Ahh thank you @mtnmanak .. I was seeing pointy wood screws in my mind.

 

[tsmith1315]

I was thinking about problems with laundry catching on screws

I typically put the screws low enough that only the last few inches of shock cord could catch. No big deal if that happens.