BT-55 model rocket parts

thingiverse

Some miscellaneous parts for working with BT-55 body tube sized rockets. The BT-55 file is a body tube itself. I do NOT recommend using this as a body tube without either 1) Lining the inside down by the motor with cardboard or some form of insulation or 2) using a piece of actual cardboard BT-55 down by the motor. When printed with PLA, this body tube will deform from the heat near the motor after one or two launches. It is suitable for a payload tube, or body tube more than 3 or 4 inches from the motor (or insulated). It can also be used to built static display rockets. The coupler allows you to couple two BT-55 tubes. This is a pass through design that will allow engine gasses to blow through. Use tinkercad or some other tool to add a bottom or top bulk head if you want to make something sealed. The shock mount is a coupler with an integrated shock cord mount. It's also pass through. I used this in conjunction with two of the 3d Printed BT-55 tubes to make a single tube long enough for a rocket. It worked, but as I mentioned, the bottom tube near the motor deformed after a couple launches due to the ejection gas heat. Generally speaking, 3D printed body tubes won't be as strong as the cardboard variety. They still work for model rockets because the stress on rockets press down from the top, not in from the sides. That said, use these in actual rockets at your own risk. I designed the tube mainly to test fit when I didn't have an actual tube available.