Check with Bear and Martin
A longbow can shoot arrows at speeds ranging from 150 to 180 feet per second, depending on factors such as the draw weight of the bow and the type of arrow used.
"Draw weight" is a measure of the strength required to draw a bow as well as the force it imparts on the arrows it shoots. It is usually measured in pounds.
the average Draw weight for deer, turcky and hog is between 60 and 70 lb
80 pounds is a very low draw weight for a crossbow and a very high draw weight for a standard bow
The energy transfer in a drawn longbow involves the conversion of potential energy stored in the bowstring as it is pulled back into kinetic energy as the arrow is released. This kinetic energy propels the arrow forward with force and velocity. The efficiency of the energy transfer depends on factors such as the draw weight of the bow, the draw length, and the design of the bow.
The lowest draw weight on a bow, that I've heard of is about 55 pounds. But I've heard of people killing deer with a little less.
The term "draw weight" in archery refers to the amount of force needed to pull back the bowstring to its full draw length. It is measured in pounds and indicates the strength required to shoot an arrow effectively.
Anywhere between 40 and 200 pounds.
150 lbs is 150 pounds of draw weight, in a bow I would say that you'd need a brear of a person to wield it. Fortunately, it is a crossbow you are talking about, but that is still too much for a child to draw. Try using a bow with less draw weight and let them build up strength so they can use a stronger crossbow when they are older.
Draw weight is the power the arrow is loosed at. Bows with more draw weight like long bows require very strong people to handle. The better the draw weight the further/harder the arrow flies eg: Arrows peircing chainmail... Hope this was the answere you were looking for. Enjoy...
The spine of an arrow is not expressed in "weight" - it is the bow's pulling power that is expressed as a weight figure. The arrows must suit this weight.Any bow takes a certain amount of force to draw back to the normal shooting position (usually with the string touching the chin and nose); this force is measured in x number of pounds - my own ash longbow is lighteweight at just 45 pounds draw weight.In order for the arrows to fly true, they must have a certain amount of flexibility ("spine") to match the draw weight of the bow - if they are too flexible they will shoot off to the right, if too stiff they will go left of the target. This is due to the so-called "archer's paradox" where the arrow first bends itself around the bow handle and then continues to fly straight.
A longbow is a type of bow that is tall (roughly equal to the height of the person who uses it); this will allow its user a fairly long draw, at least to the jaw (the average length of the Mary Rose arrowshafts is 75 cm/30 in).