Helicopter lift lines?

You don't say what scale or what aircraft you are trying to lift but most if not all cargo/recovery lines are flat straps not round ropes.  I would look at a still metal strap like is used to band pallets of fish electrical lines through walls.  Cut into shorter sections it should be stiff enough if you used four of them (four point lift).  The hard thing will be to make sure the helo's center of gravity is right over where the four lines come together at the bottom of the helo.  I think 47's have an option of lifting from one, two, or even three lift point at once.  Using more then one would help you with fore and aft balance but lateral balance would still be an issue.

Cobra is correct about the gear used to lift under slung loads in that it is not round. . I am only familiar with the modern British under slung load equipment, I know the modern American equipment is different to what we use.  You are right that the Chinook has 3 lift points, for a load like this it would use 2, fore and aft.

Not all lifting straps are the same each one has different weight requirements and different methods of attaching to the lifting points. The lighter load lifting straps you can hook directly onto the strap itself and are rated for loads under 10 tons. Now for loads 10 tons and higher you would need a beefier lifting strap these are usually visibly thicker and have hooks and rings on each end and these are rated for 10 to maybe 30 tons and are used for lifting tanks and aircraft.

supercobra

You don't say what scale or what aircraft you are trying to lift but most if not all cargo/recovery lines are flat straps not round ropes.  I would look at a still metal strap like is used to band pallets of fish electrical lines through walls.  Cut into shorter sections it should be stiff enough if you used four of them (four point lift).  The hard thing will be to make sure the helo's center of gravity is right over where the four lines come together at the bottom of the helo.  I think 47's have an option of lifting from one, two, or even three lift point at once.  Using more then one would help you with fore and aft balance but lateral balance would still be an issue.

Thanks.  I didn't know that implied they were all the same.

sorry for forgetting about this post for a while guys, ill take a look into the metal strap idea.

Thanks!