Triple Booster for Rocket

Fully functional triple engine bottom for [this rocket](https://www.thingiverse.com/thing:2664829). That rocket prints in three parts, replace the bottom part with this.

Note: you'll need a more powerful controller to launch this. I use the [Estes PS II](https://www.amazon.com/gp/product/B00FU4AX44/ref=oh_aui_search_detailpage?ie=UTF8&psc=1) with a LiPo battery. 6 C-cells did not work for me.

Works with A, B, and C engines. The fins are slightly turned to cause it to spin, hopefully mitigating any slight thrust imbalances.


- [Source onshape file](https://cad.onshape.com/documents/5739e4721329b23d8cb5d8dc/w/384e23a2a41f975eae1a0e1e/e/63894a66e5319d61a88e38b6)
- [Rocket-building CAD tutorial](http://stageoneeducation.com/cad-tutorial/)

Launch video: https://youtu.be/uP0F2TT3WSk