http://www.movdata.net/batman-symbol.html
The grappling hook
is another one of Batman's famous gadgets he uses to sneak
up on unsuspecting criminals or to save a the girl that is
falling to her death by jumping down and grappling to stop
his momentum and keep himself and the girl from hitting the
ground. It is a very cool idea
and is actually possible to make a grappling hook that can
do this, but the size that batman needs for his utility belt
is what makes it not very plausible that he can use it like
he does. In order for Batman to be able to hold
himself and create a force pulling him at at high speeds he
would need a very strong rope. Granted there are ropes
out there strong enough to do this but they are not that
small. Scientist would have to develop a small rope
that could carry a 90kg man up a wall at fast speeds while
being super light and portable. So
with billions of dollars in research Batman could possibly
come up with the capabilities to have scientist research
this and have one in real life. So far the closest
anyone has come was a MIT student who created a grappling
hook that can ascend a 250 pound man 50 feet in the air in
five seconds or less. The only downfall to this is
that the device weighs over 20 pounds.
