Originally Posted by RENATOA
First serious design flaw revealed. A fellow Xeno engine axis broke at second launch, due to excessive acceleration.
He expected this thing, because there is a * known fact * that carbon fibers does not handle well longitudinal torsion, so he had ready the replacement: a brass tube same diameter, with a 2mm carbon rod glued inside.
The brass will provide anti torsion strength, while carbon will keep it straight.
While a carbon shaft is probably not the ideal solution to transfer torsional loads, it has to be a viable option, as there are even companies producing solid shafts from 4-12mm:
Did the failure occur with the original Xeno Drive Set? Any previous damage due to turning the motor on, while the model was on the ground?