Does the length of the wing affect the speed of the paper airplane?

It's generally area that matters, as area produces lift.

So regardless of length, a wing with smaller area will need to travel faster than one with a large area, to support the same weight.

An aircraft in level flight must have lift equal to weight, so a small wing would need to travel faster. But a paper glider has no propulsion, so gravity must provide speed and lift. For this to happen, weight will need to exceed lift.

Generally speaking, a long narrow wing (high aspect ratio) is more efficient, but in paper, this is impractical. A delta configuration is more practical in paper.

the perfect few were given the ideal answer. As an avid reloader and marksman, there are speed reward with longer barrels. Like before reported, assume the load is optimum, there'll be acceleration unitl the bullet leaves the barrel. In my testing of different lots and guns, I easily have got here across that previous a 24" barrel you may figure about 50 fps income in muzzle speed. of route it has to offer up accelerating someplace notwithstanding the point is this is going to till all poweder is burnt or the bullets exits. I easily have got here across that maximum objective guns use a 26"-30" barrel. So in ultimate, length of the barrel impacts accuracy and speed, yet more advantageous importantly is optimizing you load for the fireplace arm.

In general the faster the plane is thrown the shorter the wings can be (think about how a dart is thrown)