I would also call it as noted by GB a dual coupler. It is becoming more common on some arfs these days primarily the lite 3D types and mostly for two peice elevator although sometimes it can be handy for duel pushrod or rudder/tailwheel.

The common method is a slight bend where the two rods come together for an inch or so and two wheel collors used to lock them together. This provides good adjustablity and its easy to do. It is my preferred method sometimes when doing separate pushrods for a tailwheel.

Here is one of my warbirds that uses dual pushrods for both the rudder and the elevator with 2/56 rod ends in carbon fibre pushrods.

Just added another picture of a typical arf (Magic Extra) that I have not flown in recent years but it is a nice ship and uses the two dual rod coupled with wheel collor technique. It has always been reliable and just one effective method.


John