This Engine MountKit allows you to design or convert most any BT80 based model rocket for cluster flights using seven 18mm! All FlisKits engine mount kits come with highly detailed instructions to allow for easy construction, super strong mounts and long life.
This engine mount uses SEVEN BT-20-0275 engine tubes, with engine blocks for each tube, centered in a round pattern with rings designed to fit standard BT-80 body tubes with a 0.021" wall thickness. Thicker walled body tubes can be used by lightly sanding the centering rings to fit, after assembly is complete. This mount does NOT include engine hooks but engine hooks can be added to the mount if desired.
IMPORTANT: Anytime you are designing a cluster model or converting a model from single motor to cluster motor use you need to verify the stability of your model before flight. Adding more motors to the model increases the weight in the rear of the model moving the Center of Gravity (CG) further back and may cause instability in your model. If you are converting a known stable model, the easiest method to assure stability is to fully load the unmodified model for flight (motor installed, recovery device, etc) and balance this model on your finger. This balance point is the CG of your model and you should mark this. Then install the cluster engine mount and prep your model for flight again. You will note that the CG has moved towards the back of the model. Add nose weight to the nose cone until you have moved the CG back to its original point. If you are designing your own model you should make yourself aware of model rocket stability and the relationships between the Center of Gravity and the Center of Pressure and how to measure both.
