Just a note to tell everybody that I've added several online archery calculators to my website (www.Strikepoint-Press.com). They can be used to calculate an arrow's speed, energy & momentum, trajectory and accuracy, and a bow's dynamic shooting efficiency. There have been numerous questions in this forum about these topics over the years and they should help to answer some of the questions.
Take a look at them and give me some feedback. Do they work ok on your computer? Are they useful/interesting? Easy to understand? Etc. Etc.
Just go to the site and click on the "Free Archery Calculators" tab.