- Oct 18, 2003
- Saline Michigan
Back to metal ends on composite tubes, and now you have clearance at each pin in a hole.A cluster or node is easily constructed out of carbon fiber with the introduction of the simple PIN JOINT. Totally changes the node into a much simpler fiber path.
With carbon fiber you gotta think outside the box, and this method requires the introduction of alum or 4130.
you could disassemble the fuselage and make changes as each tube is connected with the pins
First issue is that hard points always add a bunch of weight to composite structures - with this scheme it is the metal connections at both ends of every tube. That is why we generally work to avoid hard points, not put in dozens of 'em.
Second issue is all the slack that will be built into the airplane everytime there is a reversal of roll or pitch loading. It will sound like train changing direction but fast. A cascade of clunks. This effect might not be too bad if the longerons are solid, but still, all of those uprights and cross pieces and diagonals crashing back and forth through the lash in the system.
That was part of why so many early fuselages were wood and wires and turnbuckles.
Now, none of this is to say that it cannot work, just that it might be heavy and have some odd control tesponses.