Hi all,
I'm currently designing a scratch built HPR (38mm motor mount up to J impulse) which will have a transition from 4" to 2.6". I'm looking at the best (and strongest?) method of achieving this. There is no commercially available unit our there which fits the size I need. I am considering a 3D printed unit, but does anyone have experience of 3D printed parts on a J impulse? What materials, infill etc have people successfully used? The print would also have 'couplers' at either end. Is there a general rule for their length. The actual transition will be just over 6" in length.
Alternatively, I was checking out the John Coker videos of a plywood 'frame' and using polystyrene or back-fill it with expanding foam?
The body tubes will be glassed phenolic tube, so I would also glass over the transition once the structure is complete.
My concern is with such a high powered motor, would these materials be sufficient for the stresses of flight?
Thanks very much in advance - forgive the many questions!
I'm currently designing a scratch built HPR (38mm motor mount up to J impulse) which will have a transition from 4" to 2.6". I'm looking at the best (and strongest?) method of achieving this. There is no commercially available unit our there which fits the size I need. I am considering a 3D printed unit, but does anyone have experience of 3D printed parts on a J impulse? What materials, infill etc have people successfully used? The print would also have 'couplers' at either end. Is there a general rule for their length. The actual transition will be just over 6" in length.
Alternatively, I was checking out the John Coker videos of a plywood 'frame' and using polystyrene or back-fill it with expanding foam?
The body tubes will be glassed phenolic tube, so I would also glass over the transition once the structure is complete.
My concern is with such a high powered motor, would these materials be sufficient for the stresses of flight?
Thanks very much in advance - forgive the many questions!