Here's an overview of how we're fitting that bracket on the cantilever so as to mount the motors... note the overhang at the far end which will allow the outermost motor to be mounted inverted.
I've also managed to locate 20mm conduit clips with which to secure and we'll double down on them with a rivet fired into either side.
The world of furniture and buildings (what the French call movables and immovables) is essentially a square one and eminently suit the square sections we used to build the suspended space-frame. When it comes to the machinery of life, however, tubular sections of a round profile generally dominate and for good reasons.
In Europe they focus at this scale on 20mm and 22mm fittings designed for electrical and plumbing installations respectively. Carbon fibre tubing, which we'll use when the time is right, is happily provided at 20mm gauge too.
Am still agonising over whether the drone itself should be complete and independent of the passenger frame if only for transportation purposes, but I shall persevere with the current solution where the space-frame includes the flight controller and the four cantilevers are removable.
If nothing else this provides for separate transportation of the space-frame and the cantilevers prior to final assembly... which is not unlike the way the the wings of the giant Airbus 380 arrive in Toulouse from the UK under separate cover, to be married permanently to the fuselage.
