shorter bows can shoot fast, and alot of Native American bows were shorter,, Sioux bows,, 23 inch arrow was average, etc,,
I made a straight tip sinew bow 54 inches, 180 fps with 10 gpp arrow,, just for example,, it really depends on design, just depends on what you calling fast,, etc,
there is no need for a good solid anchor,, unless that is your preference,, looking at the profile of this bow,, you can guess it has good cast for its draw weight,, a 500 grain hunting arrow probaby more than 180 fps and shooting hard enough to kill a buffalo, short is as short does,, yes a longer well designed self bow could do that,,, but it wouldnt be short ,, and yes I have a chrono, and test long and short bows,, and love both,, most people make longer bows so there is more info on them,,