Working on a 3d printed water rocket launcher. Rockets next!!
The idea here is to pipe air from an off the shelf pressure line fitting to the launch tube, through which the bottle is pressurised.
I was expecting either it would work, or fail catastrophically.
Interestingly it did fail, but his it failed was kind of cool.
If seems the internal printed air duct failed and pressurised the main body from the inside.
The top surface is gently conical and the weak point where the air escapes, is between the stepped layers.
There are 5 top and bottom layers and 4 perimeters.
I would have though it would be enough but there are tiny, evenly spaced air ducts that allow air out.
At 100psi the pressure in the system drops very very slowly as the air finds its way through the print.
I wonder if the concept has any hope.
I figured a 1.5mm duct, even at high pressure wouldn’t have enough power to do any damage if it didn’t work, but pressurising the larger volume of the foot… Increases the risk too much think.