Trust us; that is too short a string for the Ripcord, unless you use a very thick string. Try to throw almost level, instead of down, and you will be able to throw with much longer string than you think. When you get to trapeze you can throw side mount instead of the straight down.
If you can, get a Spintastics Sidewinder as they are more forgiving on the throw. Or if you find a YYJ Bulldog somewhere, those can use short strings.