http://www.youtube.com/watch?v=LfnQ884zFlM&feature=youtube_gdata_player Has anyone tried this? You download it to your iphone or ipad. It is called Achrono. Did you find the readings accurate?
Here is what I got. What do you think?
I tried it out tonight. I have never chronographed a bow before. I figured this was a cheap way and might be fun. From the reviews I've seen, it is accurate within 2-3 fps as long as you measure consistently.
Tell me if this sounds reasonable....
I shot about 20 arrows. I consistently got readings in the 180s. I didn't do the math, but I would say 183 fps was the average. I measured the distance exactly and measured the sound readings consistently. This was with a 45@29 66" Toelke Whip shooting 12gpp arrows with a 9 strand ultracam string. I was expecting something around 170 fps.
For the record, I love this bow and don't care if it shoots 200 or 150, but I'm interested to know if the 183 sounds legit.