Do yourself an favor and get one of these.
http://fourdog.com/bobs-quick-buck-saw-21/They come in 21", 24", and 30" blade lengths and it folds into itself. Fast, strong, and works like an real bucksaw.
I personally have the 24" version and also have an Pole and Paddle takedown wood bucksaw, and the Sven. If you like the Sven you'll like the Bob's saw a lot better for serious wood gathering work.
