Modular Rocket

Discussions for scratch builders. For the enthusiast that builds from the ground up. Tell us what you've built and what projects you working on in the space race.

Moderator: Moderators

Rocket Onlooker
Rocket Onlooker
Posts: 1
Joined: Mon Nov 04, 2019 9:53 pm

Modular Rocket

Postby Jim-K » Sat Nov 16, 2019 12:08 am

With the summer warming up and no flying until April/May, I have started to tinker with a modular rocket design. My aim is to make different sections that can be stuck together to mix and match different motors, recovery, staging etc.

So far, I have 3D printed some ends and tried our a few prototype sections. It all seems to work, but once I set forth with a particular interface, its going to be hard to change. Happy to listen to opinions on features to add or remove.

The basic structure is based upon BT-70 & 80 tubes. This gives plenty of room to fit stuff into the airframe later. 3D printed ends are bonded in with some balsa stringers running longitudinally and a bit of PU foam.

Here are some illustrations:



I built a short section - about 120mm long - to check the longitudinal strength. About 2kN, which should be sufficient for anything I am likely to put in the back end.


The features so far are:
- Each section joined by 6 off M1.6 fasteners.
- Four pairs of balsa stringers to assist with longitudinal load.
- Two longitudinal tubes to assist with running communications.
- Radial hard points. Initially closed, but can be fitted with an M2 ‘helicoil’ as necessary.

First up I will build a tail section, a mid section with parachute and a nose section. Fly it with a 24 mm diameter E or F category, and see how we go.

316C85F5-AD01-497A-9B8B-11DD85DB0C4A.jpeg (22.88 KiB) Viewed 267 times

Ideally there will be time for bigger, faster, higher etc later.

User avatar
Posts: 2203
Joined: Mon Dec 15, 2008 9:56 pm
Location: Brisbane

Re: Modular Rocket

Postby SpaceManMat » Sat Nov 16, 2019 7:48 am

Neat idea. It will be interesting to see how this comes together.
QRS: 124
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing

Posts: 981
Joined: Thu Oct 02, 2008 7:37 am
Location: Central Tablelands, NSW

Re: Modular Rocket

Postby strud » Sat Nov 16, 2019 11:54 am

I like modular approaches, reuse saves time and reduces risk in new projects.... theoretically.

M1.6 fasteners, wow didn't know they existed!

Return to “Scratch Built”

Who is online

Users browsing this forum: No registered users and 4 guests