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Length effect on the CG of a craft.
To Gene and all other pilots, I readdress the advantage of the longer rotor shaft on a Robinson Helicopter.
Center of Gravity relative change with regards to vehicle’s length. Additional added passenger weight effects the CG less with a longer distance between a helicopter ‘s cabin seats to the rotor hub, and also a boat’s longer hull length.
Another way of looking at length + angle + force is a man trying to bend a treetop over, by his force pulling down on the attached rope. The man has less effect on bending the taller (longer) tree, then the shorter tree within the same measured distance from the tree’s trunk (only the rope’s angle changes). The man’s force (like an occupant’s weight inside a Robinson helicopter cabin) is pulling at a different angle.
This is why the Robinson Helicopters have a longer rotor shaft (distance between cabin and the rotor hub). Adding additional passengers has less movement of the CG, and therefore, on the piloting adjustment by the R.H. pilot.
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