All your doing is trying to confuse the facts.
you know as well as I do that the mass will not and cannot impart more momentum than it has due to its movement to the pipe itself.

Quote:
if the accelerator imparts +1 unit of impulse, then the 1st turn will give -2, not -1.


Im talking about the pipes momentum.
not the amount of change in the momentum of the mass as you are.

the mass will still have the same speed as it leaves the first turn.

http://www.youtube.com/watch?v=L2mdAvdPhT4

as the mass passes through the 1st turn , the mass will impart only -1 to the pipe , but the change in the masses momentum would not be -2 as you say.

the mass momentum would go from a (-1) to zero then to a (+1)

however you cannot use the change in the mass momentum to determine any change in the pipe speed.

the mass with a +1 momentum then passes through the 2nd turn and imparts a +1 momentum to the pipe.

thus the pipe has +1 momentum after the 1st cycle of 3 events.

1) acceleration = -1 mass momentum, +1 pipe momentum action , reaction
2) 1st turn = +1 mass momentum, -1 pipe momentum action , reaction
3) 2nd turn = -1 mass momentum, +1 pipe momentum action , reaction

result = +1 pipe momentum

1) acceleration = -1 mass momentum, +2 pipe momentum action , reaction
2) 1st turn = +2 mass momentum, -2 pipe momentum action , reaction
3) 2nd turn = -2 mass momentum, +2 pipe momentum action , reaction

result = +2 pipe momentum

etc . etc , etc

this is what you claim you were never capable of understanding so we never did get past this point.

you would need to have several of these timed to achieve constant forward movement.

but you were only interested in stalling the discussion because I can tell your not that stupid.

the cars and motorcycles in the below video are driving around in a circle inside a large barrel , the vehicles are undergoing a constant change in momentum.

http://www.youtube.com/watch?v=hZOekFFSoWI&feature=related

but you wouldnt use the change in momentum to determine the speed at which the vehicles need to travel in the barrell to keep from falling.

change in momentum is like change in direction.
you are trying to lead the discussion in your favor using change in momentum of the mass which is very misleading dishonest on your part.

we should not be using change in momentum of the mass at all when determining the movement of the pipe itself.







3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.