Cable telescopic mast 2 

No, I haven't seen it.

Please read the video description. STEP files only contain information about the shape, size, and location of parts, but not assembly and simulation information.

The following illustrates your idea: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yInMEfrQWwA.html

@@thang010146 wow you already have it😂 nice

But, the pulley system is made 10 years ago. This is 2 years ago. Can i say that this system is better than the pulley ?

All videos in this channel are made in Autodesk Inventor, Dynamic Simulation.

@@thang010146 How do you define the initial movement of the telescopic in the dynamic simulation model?

All videos in this channel are made in Autodesk Inventor, Dynamic Simulation.

Yes, I will do that. However, have you watched all 3800 of my published videos?

Autodesk Inventor.

Y B will not move unless pulleys are self starting.....

@@kalpeshwani8520 When the green block is lifted, the pulley attached to the green lifts with it. One end of the green pulley's rope is attached to the base, meaning if you switch the perspective to be locked on the green block, it will appear as if the gray base is moving down and away, which is effectively the same as just pulling down on the string, which in turn lifts the yellow block. Rinse and repeat the same process with the blue block. So in a way, yes. the pulleys moving the yellow and blue blocks _are_ self-starting but that's simply because of the nature of its kinematics. There's no automagical actuation happening with the green and yellow pulleys.

Almost every mobile crane in the world uses this principle to extend its boom so yea its feasible.

Chortle- this mechanism is everywhere!