Originally Posted By: paul

EXACTLY , thats how it works.

reactionless propulsion , I rest.

Yes, that's what I've been saying all along, but it's not useful propulsion for a spaceship.

If you want to repeat the process and do another step, you have to have another guy waiting at the bottom of the ladder, and ask him to climb it too. If anybody goes back down, they reverse the movement they caused climbing up.

The maximum possible distance you can travel is the length of the pipe. And even that's only achievable with a massless pipe.