Thats simply not practical. You need a special lever to lock the spring. I can measure the speed of the arrow.
I would really appreciate it if someone could help me how to calculate the time needed to propel the arrow by the spring in an idealized environment.
Despite the picture, quite some assumptions need to made: no recoil for example.
If you would assume that the propulsion is coming only from a mass less rubber spring, no friction exists, how would you calculate the time it would take for the arrow to cross the 17.5 cm (knowing the final speed)...
The rubberband has a round shape (rod shape) with a diameter of about 5 mm. I will post a picture of the actual bow later today.
I have no equipment to measure extensions under different loads, so I don't have or can easily collect that information.
This is the set-up:
I can measure the velocity of the departing arrow. The mass of the rubberband spring is unknown and not practical to measure.
I would be interested to use the velocity and the other known parameters to calculate bow characteristics including the power of the bow.
Let me...
@ Dr D, I was trying to show how I could correct for the fact that the path of the arrow is not the same as the extension of the spring. I calculated for each cm along the path of the arrow, the length of the spring and from that the extension of the spring. As you can see there is a polynomial...