BT-55 to 24mm Boat Tail 3D Model
 

I designed a BT-55 to 24mm boat tail. You can download it from Thingiverse for free and print it. There are two versions - one that allows for an engine hook and one that doesn't.

https://www.thingiverse.com/thing:4029435

Is there a chance of a BT-60 to a BT-55 boattail possible in the future? It would be nice to have this for an X-15 model.

Sure. They are pretty easy to design. How long does it need to be? Does it need a channel for an engine hook?

This would be great. The length 1" inch and engine Chanel not needed. Thanks in advance.

Here ya go! I ended making to versions - one with and one without an engine hook channel.

https://www.thingiverse.com/thing:4031312

Thanks, Jack, I wish I had the ability to draw this kind of thing. Thanks again. I'll be printing up a few this week.

Let me know if I need to make any changes to it.

Jack, just a couple pictures to let you know the BT-60 to BT-55 boattail turned out great and fits good also. Thanks again.

That looks really good! I'm glad to see the dims I used worked correctly.

What kind of printer did you use and what kind of plastic did you use to print with?

I have a Creality CR-10mini. The plastic was PLA. I have only been printing for about 2 months.
I use Ultimaker Cura to turn STL into a slier code. Thanks again, Jack.

I ended up also designing a BT-60 to BT-55 boat tail per another's request.
https://www.thingiverse.com/thing:4031312

That looks really good - far smoother than some 3D parts I've had to deal with.

I was really satisfied with the print. I have my printer set on the finest printing setting it has or should I say the finest setting Cura allows me to set my printer at. It takes longer to print things but it's worth it. I still have to sand pieces but not as much.

At the moment I'm working on the X-15 found on Thingiverse resize to a BT-60 size and to fly on a D size engine. https://www.thingiverse.com/thing:3048552 I may try to do a build thread here when I get everything printed up and the assembly figured out. I find the printer really handy.

PLA is not the best choice for 3D printed model rocket parts. I have had to reprint almost all of the parts I made from PLA in either ABS or some other higher temperature filament like Nylon or PETG. I have two Creality Ender 2 printers and now an Ender 3. I built enclosures out of Styrofoam for the Ender 2 printers that allow me to print with ABS filament. I also use the CURA slicer software that comes with the Creality printers. I have owned 3D printers for about 2 years and have printed thousands of model rocket parts. After about 3 to 6 months I noticed all of the PLA nosecones I made were very loose fitting, much more so than when they were originally 3D printed. All the tail cones I made and flew in model rockets curled and wrinkled at the bottom where they were either exposed to hot exhaust and/or the motor mount tube. All the fins on the fin cans I 3D printed with PLA warped and looked liked Lasagna noodles! The full rockets I printed in PLA now have a distinct bend in them. There is a good reason Additive Aerospace only uses PET plastic for the parts they sell: https://www.additiveaerospace.com/

Thanks. for the advice.