
Update on progress
I connected the turret motor as per the diagram and that works
I connected the barrel elevation (bloc lever baisser canon) and it moved briefly, then stopped.
I connected the gun unit (without a barrel) direct to a battery to see if that worked, and yep it fired a pellet, but when I connected the barrel, if failed to shoot out of it just didn't go down
I may have a look at the transmitter and see if any of the contacts are dirty or broken
Thanks again Jofaur86 for your help