vineri, 27 iulie 2007

bushcraft - [p3]


[ BACKPACKS ]

EXTERNAL FRAME BACKPACK

External frame backpacks are constructed with a bag attached to a visible metal or resin frame. Some external frame packs offer a frame that adjusts in length, however most are not adjustable. It is important to choose a frame that is the correct size. Try the pack on and ensure the hip pads and hip belt rest snugly on your hips – the shoulder straps should connect to the harness at the same level as your shoulders.

External frame packs have the advantages of:

a. adaptability of components – bags can interchange and you can add objects from one person’s pack onto another’s (great if one of your teammates is having trouble and you want to help carry some of their kit);
b. you can carry large and awkwardly shaped objects;
c. the bag and cargo does not press against your back, offering ventilation and a comfortable carry;
d. frames can be used to make an emergency stretcher; and
e. heavy objects are easily attached close to the shoulders.

The disadvantage of this frame is that the pack is very rigid and the load is held higher up your back, raising your centre of gravity.

These characteristics make an external frame pack great for novice trekkers, and for carrying heavy loads over worn trails and fairly level terrain.