all right ill start with a termodinamics problem that can lead to free energy or even the amazing selfstanding umbrella
http://i40.photobucket.com/albums/e222/raaaid/palanca.jpg
imagine a cilinder 2 m long 1 m2 surface that has a 10000 kg piston in the midle
when vertical pressure is 1 bar or atm, 10000 kg/m2, the downforce of the piston
leaned 30º pressure will be downforce of the piston again which will be 10000*sin30. so 5000 kg/m2 or 0.5 bar
so the piston moves 1m away since half the pressure double the volume, now height of the piston will be the initial 1 meter plus the 1 m which displaces*sin30 which give us a height of 1 m
so the piston has an altitude of 1 m vertical as leaned 30º so hoewver much you lean it the piston will always have the same altitude
which means that if the tube is weightless the center of gravity will remain at the same altitude however leaned or vertical
so in my opinion taking the tube from verticality to leaned 30º and back will take as much effort as displacing the 10000 kg horizontally which in the case of there no being friction it will be 0
now connect the piston to a generator and have free energy, a little girl could use this as leverer and rise tons
now exist the posiblity that entropy or something acts so what do you think
now for those whos gonna say the piston falls over:
if the cog doesnt move gravity doesnt move it, for movement to occur potential energy must be spent by lowering the cog