Forces exerted on support rollers?

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The discussion focuses on the forces exerted on support rollers for a rotating steel tube assembly. The assembly includes a 49" diameter tube with a welded 6" diameter steel ring, rotating at approximately 27 RPM, and is supported by two bearing-mounted rollers positioned at 36 degrees from vertical. The question posed is whether moving the rollers closer together to 60 degrees apart would increase or decrease the force required to rotate the unit. The total weight of the assembly is 10,000 lbs, and the distance between the shaft support and the rollers is 78 inches. The inquiry seeks insights into the impact of roller positioning on rotational force requirements.
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A 49" dia. steel tube (shell) with a 6" x 57.5" dia. steel ring (Tire) welded to the tube rotates horizontally at ~ 27 RPM. Inside of the shell are 42 - 2.5"dia x 6' long solid steel rods. It is held at one end by a 5" dia. bearing mounted shaft, at the other end the Tire sits on 2 bearing mounted 14" dia. rollers. The shaft support and the support rollers are 78" appart(from center of bearing to center of roller). The total wieght of this unit is 10,000lbs. The support rollers sit at 36deg from vertical or 72deg from each other. Is the force required to rotate the entire unit increased or decreased if the rollers are moved closer together so they were say 60deg apart? I have attached a quick sketch for clarity.
assem1.jpg


assem2.jpg


I hope I didn't miss something. Any help would be really great guys...Thanks in advance.
 
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Wow! I would have thought at least one of you "Master of statics" would have attempted to tackle this.
 
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