Nerf speed

Recently I built my own Chronobarrel, I designed the attaching barrel and used the Ammocounter box that can be found in Thingiverse. 

The measurement is quite simple. For example, measuring the speed of the Nerf Fortnite SP-L, if the dart is 72mm long and it takes 1904 microseconds passing throw the IR sensor. The dart speed is; 0,072/0,001904 = 37,8 meters in a second.

You should have in mind that the cap of some darts are transparent for the infrared light, not only the darts with semi transparent caps. For example, I realized that the chinese in the copy of the typical Elite dart (blue body and orange cap) the cap was not detected by the IR beam (but yes in the original darts). Of course this means that these darts would seemed to be quicker than the others. 

I have measured some of my nerf.

Nerf Fortnite SP-L
#1- 37.82 m/s, 136 k/h.
#2- 35,36 m/s. 127 k/h.
#3- 36.36m/s. 130 k/h.

Nerf Stryfe
#1- 34,88 m/s, 125 k/h.
#2- 36,07 m/s,129 k/h.
#3- 36.81 m/s,132 k/h.

Nerf Pockedstrike
#1- 28.39m/s, 102 k/h.
#2- 30.51m/s, 109 k/h.
#3- 29.9m/s, 107 k/h.

Nerf Infinus
#1- 59.21m/s, 213 k/h.
#2- 48 m/s, 172 k/h.
#3- 56.6 m/s, 203 k/h.

Nerf Disruptor
#1- 37,11 m/s, 133 k/h.
#2- 39.22 m/s, 141 k/h.
#3- 37.34 m/s, 134 k/h.

Nerf Barricade RV-10 (old gun)
#1- 71 k/h.
#2- 74 k/h.
#3- 72 k/h.

New additions - 21/09/2019

Nerf Jolt
#1- 96 k/h.
#2- 97 k/h.
#3- 93 k/h.

Nerf Hammershot
#1- 137 k/h.
#2- 136 k/h.
#3- 130 k/h.