Seem a large mobile crane going Nth from here other day, didn't get a real good look at it, but prolly one of those Leibherr L/H drive jobs or similar.
Big bugger, either 10 or 12 axle job, wide enough for an escort, was towing a tri axle "pig trailer" affair with the crane boom facing backwards, instead of the usual overhang forward.
Ungainly looking setup, wondering how they go steering them on the road, if the swivel point was locked rigidly they would tend to be a pig of a thing to steer?
You would think that the boom would be trying to steer the p/mover.
So, how do they set them up for travel?
Must be some sort of turntable on the triaxle pig and the boom allowed to travel or swing on it's own turntable?
Which I thought would be a no-no as normally a mobile crane , you would think, wouldn't be allowed to travel on the road without being locked down?
Dont know if the "pig trailer" was actually hooked up to the P/ mover by a conventional "ringfeeder" type hitch, or was simply secured to the boom somehow as in similar set up to those remote mounted steerable rear hitches as in long extendables?