How much is recurve bow's 28kg pulling force?

Recurve bow's pulling force of 28 kg is about 25-35 kg.

Recurve bow bow is relatively long, and its relative deformation is very small, and its tension changes regularly. In the actual traction distance, the tension changes evenly, while the tension of the compound bow changes sharply because of the pulley.

Recurve bow's long bow piece also determines that the included angle between the bow and the string is very small after opening the bow, which makes the arrow-catching point fluctuate up and down very little during the movement, while the included angle between the bow and the string of the compound bow is very small, and the small unsynchronization between the upper and lower bow pieces and the pulley will amplify into the big fluctuation of the arrow-catching point.

Bow tension generally refers to the maximum tension, so different types of bows have the same tension and different energy. For example, a 50-pound compound bow is usually more energetic than a 50-pound recurve bow. Moreover, there is another parameter that you haven't given, that is, the pulling distance. There is no way to calculate the tension without calculating the distance.

Recurve bow, bow 8 inches, pull 28 inches, and the tension curve is straight. So the average pulling force is 25 pounds. The working distance is 20 inches. A force of 25 pounds is about 1 1 kg,11Newton. 20 inches is about 0.5 meters. Therefore, the bow is fully stretched and does about 55.5 joules of work.